1JZ-GTE max boost on stock turbos

[Kingsoup]

OK, I am sure everyone is sick of reading about 1jz swaps but I am just curious if anyone knows what the stock turbos will provide up too in boost? I am talking about the CT12a's I think they are called, also does anyone know what size injectors are on it? 440's or maybe 550's?

I'm gettin 1JZ fevor!

----------------------------------------------------
88 Supra Turbo

[controler]

I am fairly certain that the max you'll get out of 12a's are 22 psi. I don't know where the specifics are, but they lose efficency there, so most guys keep them at 19-20 psi. As for the injectors, I know jspec 2jz's came with 430 cc, so I would assume the 1jz's are similar.

[Trent@SupraSport]

I was talking to Orin at the TX2K2 meet and he was unable to get his car there because of his injectors.

Stock injectors are 380cc's. He has a set of big Blitz turbos and was trying to do a swap to 550's to support it and was having trouble. But he did tell me the stockers are 380.

[toypro]

stockers are actually 370cc..You can wire in the mkiv 550's by adding a resistor in-a mk3 turbo one should work. The 1j uses high impedece side feed type injectors. I had a set of mkiv 550's I was going to use, but I just traded them for the jap spec 2j 440's. Remember with 2.5 liters vs 3, you don't need as much fuel-you'll make more power on a 1j with 440's than a 7m can. The ct12a isnt that great of a turbo from what I've been reading. They have creamic wheels which aids in decreasing spool time(I read that the lag is not at all noticable), but limit the amount of boost you can run-most say 15 psi is the max you can run before the blades actually come apart. I've been told the ct 12b uses the same size shaft and blades, only steel and these can be swapped into a ct12a turbo. Supposdly the mk4 turbos don't bolt right up to the 1j, but with a little work can be made to fit. This is my plan later down the road. With the cheap prices those turbos go for, it be worth a shot. The high impedance 440s can be had for cheap as well-just find someone who has bought a jdm 2j-those injectors are worthless to them. I got a fuel rail with the 550 for 200 than traded straight up for the 440's. The mkiv turbos go for around 250-500 depending on milage. They have made as much as 470rwhp on a 2j-and who said a 1j was expensive to modify? The more and more I read about the 1j, the more I can't wait for it to get here.......
T minus 14 days till delivery........

[Kingsoup]

Awesome, thanks for the info guys, thanks a lot for the extensive infor toypro, I can't wait for you to get your engine either )

Dreaming of 1JZ's

------------------------------------------------
88 Supra Turbo

[jbsupra89t]

Originally posted by toypro
The more and more I read about the 1j, the more I can't wait for it to get here.......
T minus 14 days till delivery........

I hear that, mmmm.... 1JZ. 6 days here.

-J

[psychot|K]

how much did you guys spend? cause i'm interested too

front clip or just the engine?

[Kingsoup]

I am also curious on the cost you guys are enduring, and how you managed to source the special parts you need for the conversion, bellhousing ect. is the clip coming with a 5-speed? Is that 5-speed a R-154 with a diff belhousing? or is it like a W-58?
Just trying to figure out what kind of trouble I want to get into.


Thanks!

-------------------------------------------
88 Supra turbo

[jbsupra89t]

well, first of all, if you got the time and money, i dont think there is any kind of trouble you can't get out of :D as for the bellhousing, my particular clip is coming with the 1JZ bellhousing and 1JZ flywheel. with the 1JZ bellhousing, that allows it to bolt right up to the R154 (i am uncertain how it would work with a W58, someone care to clarify?). but if you weren't sure of what to get (just 1JZ-GTE or clip), i would most certainly recommend the clip. because everything you see in your 7M bay would come in the engine bay of the 1JZ (except you would just have the parts from a 1JZ, but you can see my point). as for your question about the trans, the 5spd in the 1JZ is the R154, but a diff bellhousing, as i mentioned above. because the transmissions are the same, the bellhousing will match up on the R154 side, and also on the 1JZ-GTE side. you cant use the 7M bellhousing because the bolts dont line up. i hope this answered your question. just trying to help. (toypro, care to confirm anything i just said with what you have read/heard? thanks.)

-J

[psychot|K]

hehe ok but how much does the clip COST :)

[jbsupra89t]

for me, 2700 including shipping.

-J

[psychot|K]

hmmm
that's not too shabby
mind telling me where from?

[Kingsoup]

Thanks jbsupra89t, thats what I wanted to know. Sounds like if I could find a clip for not too much that might be the idea. I did hear though if you got a engine +ECU+harness+mounts but no tranny you could use the W-58 bellhousing from the mk4 too bolt onto a R-154 that would mount onto the 1JZ. Anyone know that forsure? I heard that along with the JDM 7M's most 1JZ's come with autos so it might be hard to find a 5-speed JDM R-154 along with the engine and accessories.

----------------------------------------------
88 Supra Turbo

[jbsupra89t]

yeah, i have heard that the 1JZ's came most often mated to the automatic trans (i have NO idea what the name of it is). and the 5spd models are even less, far less. that doesn't mean that you wont find one, though. though i am NOT ENTIRELY SURE of this, if you found a front clip from an AUTO, you could goto www.supras.nl and look for the info on the bellhousing and acquiring one (i think he mentioned somewhere on the site that he could get one), and find an 5spd ECU. while that may be more work than it's worth, it would logically seem like a valid option. i would not know because i have never heard of that being done, just a thought that came to mind. so answering your original question, i have no idea about the bellhousing from the W58 and bolting it onto the R154. one place i know you could go to try to ask these questions also is southfloridatuners.net and click on C&N performance. they have these swaps. HT(somewhat)H

-J

[jbsupra89t]

sorry, it's southfloridatuners.com

[toypro]

Most 1j do come from Soarers-which are like 99% autos. You cannot mate the r154 without any bellhousing but the 1jz one-the w58 husing from the 27 will bolt to the 1j-but not to the r154. To use an r154 you also must have the right flywheel-neither the 7m or the 2j w58 will work with the 1j/r154 combo. JZA70 manual tranny clips are pretty hard to come across. I got a manual turbo R model on the way-I am going to be paying about 2800ish for everything. But I am getting the entire clip, the lsd,doors the suspension and some other stuff I'm sure I've forgotten. My frined who owns an engine import buisness is bring two exact same clips(and everything else listed above over) I don't know for sure, but I think the other one has not yet been sold. I don't know what he'll want for everything on the other one-I am supposed to be getting a "friend" discount so I am unsure the cost on the other clip-I do have to stop by his shop on Monday so I'll ask him about it . I personally would not even go about attempting the swap without an entire clip until enough people have done it so everything thing you need will be noted somewhere.It would suck to be missing a small part that keeps your engine from running, and not be able to find that particular part in the USA. The only items I know of that are needed that will not come with the clip is a power steering hose from a 93-94 mkiv turbo(I'll have the part number next week) and the throttle cable from a mkiv turbo-these are both needed to convert the car to left hand drive. The AC I still don't know about. I doubt you'd be able to swap the jdm lines in and I am 99% sure you won't be able to use the 7m ones. Maybe custom lines would have to be made. I still have yet to decide if I'll even both keeping the AC-I may just scrap it for the weight savings....

[jbsupra89t]

toypro, the other clip, does that include all the seats and all those other goodies? if so, could you please email me at tdr2000c@yahoo.com i have some inquiries for you. btw, i already have a clip coming, just not one of the super clips with all the other stuff. thanks.

-J

[SupraKirk]

Originally posted by toypro
Remember with 2.5 liters vs 3, you don't need as much fuel-you'll make more power on a 1j with 440's than a 7m can.

Can you explain this further?

[toypro]

Originally posted by SupraKirk


Can you explain this further?

I guess I am assuming with less displacement, you'll need less fuel for a good air/fuel mixture. I know the 1j makes 50 more horsepower stock and has smaller injectors than a 7m(370vs440) the 1j guys don't seem to upgrade until higher in the horsepower levels than the 7m guys.I could be wrong, I am 90% sure that a 1j that layed down 600ish not long ago was running 550's, which I don't think you could get away with on a 7m..

[HedgehogSandwich]

The ceramics on the !JZ are the weak part of the engine. They're small turbos on the 1JZ to allow for quick spool up, and smooth acceleration. They dont like increased boost.

Dont go over 14 psi with the stocks, the ceramics will seperate from the main shaft after prolonged use. Most modded 1JZ 's go for uprated turbo's.

adi

[jbsupra89t]

hedgehog, you know any good parts sites in england that have a good selection of 1JZ parts? thanks.

-J

[HedgehogSandwich]

parts..no. for most of my parts i ahve to go to Toyota, and they normally have to import them.

There are one or two tuning companies that sell bolt ons for the 1JZ, but they are few and far between.

The 1JZ is also very rare in the UK, with very little information and parts available.

adi
JZA70

[MK2_1JZ]

Well I've stopped dreaming about 1JZ cause I've got mine going! Good luck fellas in the conversion. Mine took 5 weeks of hard work. All worth it though.

www.1jzsupra.20m.com

[turbotoy]

Originally posted by toypro


I guess I am assuming with less displacement, you'll need less fuel for a good air/fuel mixture. I know the 1j makes 50 more horsepower stock and has smaller injectors than a 7m(370vs440) the 1j guys don't seem to upgrade until higher in the horsepower levels than the 7m guys.I could be wrong, I am 90% sure that a 1j that layed down 600ish not long ago was running 550's, which I don't think you could get away with on a 7m..

This really isn't valid. What we are concerned with is mass flow rate of air through the engine, though it is a function of displacement. All things held constant except displacement, it will take equivilant mass flow rates of air to get equivilant power output. Since we need to control the ratio of the mass of the fuel injected into the mass of air, fuel requirements will be roughly the same for the same power output regardless of displacement.

[turbo7mgte]

Originally posted by Kingsoup
Thanks jbsupra89t, thats what I wanted to know. Sounds like if I could find a clip for not too much that might be the idea. I did hear though if you got a engine +ECU+harness+mounts but no tranny you could use the W-58 bellhousing from the mk4 too bolt onto a R-154 that would mount onto the 1JZ. Anyone know that forsure? I heard that along with the JDM 7M's most 1JZ's come with autos so it might be hard to find a 5-speed JDM R-154 along with the engine and accessories.

----------------------------------------------
88 Supra Turbo

to run the r154 in a 1j you need:

call mueler fab and have one made tell them you want a 7m flywheel with a 2j bolt pattern on the center

from hkspower at socalsupras.com

[Frank]

Thanks turbotoy. I was thinking the same but I didn't want to lead anyone astray. I secon turbotoy.

[cullen]

for all who are doing a 1jz swap... how will you wire the thing up?
even if you have a clip, the harnesses are still different. are you going to cut and extend all of the wires? mike u. will make a custom harness that bolts in for you, it is about $800, ouch!

[Wade]

Originally posted by toypro


I guess I am assuming with less displacement, you'll need less fuel for a good air/fuel mixture. I know the 1j makes 50 more horsepower stock and has smaller injectors than a 7m(370vs440) the 1j guys don't seem to upgrade until higher in the horsepower levels than the 7m guys.I could be wrong, I am 90% sure that a 1j that layed down 600ish not long ago was running 550's, which I don't think you could get away with on a 7m..

The 1jz makes more HP stock cause it's running more boost stock than the 7m.
1JZ = 280HP @ 10.5psi, 7M = ~282HP @ 10.5psi.
The reason the 1JZ can make more peakHP is because of it's short stroke and it's propensity for higher rpms.

[CTsupra]

Ok, to run the 1jz on a ma70 or an ma71 chassis you need:
1. 89'+ liquid filled motor mounts (yes your 89'+ motor mounts have liquid in them) and an 91'-92' crossmember.
2. The 1jz bellhousing to fit the r154. Toyota part # 31111
3. Cluth part #(opt) 14111
Toyota should be able to import these. You get those parts and your done!

Im getting a 1jz-gte+ecu+a modified lhd harness for $1500 if my deal works out. Orig. price $2500, but since the guy im going through might buy the body of my car minus engine&tranny for $1000, hes gonna take it off the price of the package!!!!!!!! :D

Also, does anybody know exactly what the stock turbos on a 1jz can max boost before they choke themselves?

[Great-S]

Originally posted by Grey87T
Ok, to run the 1jz on a ma70 or an ma71 chassis you need:
1. 89'+ liquid filled motor mounts (yes your 89'+ motor mounts have liquid in them) and an 91'-92' crossmember.
2. The 1jz bellhousing to fit the r154. Toyota part # 31111
3. Cluth part #(opt) 14111
Toyota should be able to import these. You get those parts and your done!

Im getting a 1jz-gte+ecu+a modified lhd harness for $1500 if my deal works out. Orig. price $2500, but since the guy im going through might buy the body of my car minus engine&tranny for $1000, hes gonna take it off the price of the package!!!!!!!! :D

Also, does anybody know exactly what the stock turbos on a 1jz can max boost before they choke themselves?
14lbs anyhigher it'll just spike and drop

[psychot|K]

but just swap out the turbos and put in 2 really sweet HKS GT2510 turbos...that would be a SWEET setup.
NO lag and good for about 550HP (been done on a RB26DETT)
or run a nice T51R SPL
LOL

[OB-1]

Originally posted by toypro


I guess I am assuming with less displacement, you'll need less fuel for a good air/fuel mixture. I know the 1j makes 50 more horsepower stock and has smaller injectors than a 7m(370vs440) the 1j guys don't seem to upgrade until higher in the horsepower levels than the 7m guys.I could be wrong, I am 90% sure that a 1j that layed down 600ish not long ago was running 550's, which I don't think you could get away with on a 7m..

I know everyone is saying don't go over 11psi or14 psi. I ran 16psi on the stock turbos and 22 in Houston with no problems other than over heating and warping the head. But that's a different story. Hardpipe kit does wonders and an aftermarket inercooler will give you the ability to raise the boost. I got a set of CT-12Bs (2) complete pairs for sale if anyone wants them. The car is running nicely now and I cannot wait to raise the boost up once I get my EVC Pro in. I know everyone is saying don't go over 11psi or14 psi. I ran 16psi on the stock turbos and 22 in Houston with no problems other than over heating and warping the head. But that's a different story. Hardpipe kit does wonders and an aftermarket inercooler will give you the ability to raise the boost. I got a set of CT-12Bs (2) complete pairs for sale if anyone wants them. The car is running nicely now and I cannot wait to raise the boost up once I get my EVC Pro in.

OB1
1.5 JZ GTE
Blitz K26 Twin Turbos
550cc 2JZ upgrade w/ resistor

[Great-S]

Originally posted by OB-1


I know everyone is saying don't go over 11psi or14 psi. I ran 16psi on the stock turbos and 22 in Houston with no problems other than over heating and warping the head. But that's a different story. Hardpipe kit does wonders and an aftermarket inercooler will give you the ability to raise the boost. I got a set of CT-12Bs (2) complete pairs for sale if anyone wants them. The car is running nicely now and I cannot wait to raise the boost up once I get my EVC Pro in. I know everyone is saying don't go over 11psi or14 psi. I ran 16psi on the stock turbos and 22 in Houston with no problems other than over heating and warping the head. But that's a different story. Hardpipe kit does wonders and an aftermarket inercooler will give you the ability to raise the boost. I got a set of CT-12Bs (2) complete pairs for sale if anyone wants them. The car is running nicely now and I cannot wait to raise the boost up once I get my EVC Pro in.

OB1
1.5 JZ GTE
Blitz K26 Twin Turbos
550cc 2JZ upgrade w/ resistor
:eek: that setup you have looks sweet this is billy if you don't know who i am already. let me know what you run with that setup.laters and happy boosting

[Kingsoup]

I'm suprised this thread has lasted so long, hee hee. I was originally thinking that if you bought the 1JZ with the two c12a's, maybe since they flow much higher CFM then the CT-26 that making big power on the stock turbos might be easier. @ 14 psi on the CT-26 mk3 makes about 300hp right? A 3000GT TT @ 14psi makes 400hp, right those two tiny TD04's make more CFM then the poor CT-26 does at that boost level.

If you figure that the c12a's flow more CFM then the CT-26 does, then you would figure also that @ 10 psi you would be flowing say 400cfm as apposed to 280 cfm on the CT-26 @ 10psi

Anyways I was thinking that with a proper intercooler and hardpipes + exh,intake you could maybe get 400hp out of the ct12a's assuming they had a max flow of 9psi a piece @ 250cfm a piece or something like that. If you figure a T04E for the 7MGTE + manifold costs over 1000$ american, you would get the equivelant in stock turbos from the 1JZ not to mention pre-improved internals and a MHG from the factory. Its a tricky bit of kip, I wish someone who has done the 1JZ swap would inform us of the max power that can be made on the c12a's. Although I guess you could buy the motor with no turbos, then get some ct12b's then you would know what your're flowing.

I wonder if the way to go is to buy a stripped down 1JZ with no turbos just ECU and harnass + bellhousing and get some ct12b's and 550's from some upgraded mk4, perhaps a stock mk4 intercooler and zoom zoom your way into speed happiness.

So many options, so little money. :sad:

-------------------------------------
88T

[jbsupra89t]

wait a second, i was under the impression that you couldn't use the CT-12Bs from the MKIV, because they only use one wastegate instead of two on the CT-12As. OB1, if you can use those CT-12Bs on the 1JZ, you might wanna check your pm. thanks for the information everyone.

-J

[OB-1]

Originally posted by titesupra
for all who are doing a 1jz swap... how will you wire the thing up?
even if you have a clip, the harnesses are still different. are you going to cut and extend all of the wires? mike u. will make a custom harness that bolts in for you, it is about $800, ouch!

I take it you have something special under your hood with the ET and trap speeds you posted. What was your sixty foot times? What engine combo? Like to see your pics if you don't mind.

OB1

[89Turbo]

Originally posted by Kingsoup
...not to mention pre-improved internals and a MHG from the factory.

I don't think the 1JZ-GTE comes with a MHG from the factory. As for the max power level on stock turbos, I think Mike Urbano's Supra had about 500hp when it had stock twin turbos on the 1JZ-GTE. I might be wrong though.

[HedgehogSandwich]

The 1JZ uses MHg's standard.

[mkiiisupra89]

[quote]
There are one or two tuning companies that sell bolt ons for the 1JZ, but they are few and far between.
[quote]

Wrong answer. They are few and for between out side of Japan. The 1jz has been around for 12 years and has been well developed. HKS, Apex, Blitz, Trust/Greedy, etc all sell everything. I can get a bigger HKS intercooler for my jza70 (1jz mkiii) than I could for a jza80 (2jz mkiv). Depending on what your engine/ecu came out of you may even be able to get a Apex Power FC (drop in programable fuel computer for less than $1500!). I just have to have it imported and that is slow and expensive.

Andrew

[Kingsoup]

Whats all this business about extending the wiring harness by 3 feet? is this adapting the soarer harness too the MA70? Do you still have to do this if you get a JZA70 harness?

Lets keep the info rolling! 1JZ's for all!

--------------------------------------
88 Supra Turbo

[jbsupra89t]

the reason you need to extend the harness 3ft is because the 1JZ was made for a RHD car. so if the harness leads off of the intake manifold, and the ECU is under the glove box, then that means from the intake mani. to the glovebox is not far at all. but because on our 7M the harness traverses the engine bay along the firewall, and into the passenger side under the glovebox. that is the appropriate length. as for the bit about the soarer harness, no matter what 1JZ you get, if it comes with a harness, and hasn't been changed in any way by someone stateside, than it is too short, and needs to be changed. hope that somewhat helps you out.

-J

[psychot|K]

but who says you have to mount it in the glove compartment?

[cullen]

ob1, check your PM's for your answer

[Great-S]

Originally posted by jbsupra89t
wait a second, i was under the impression that you couldn't use the CT-12Bs from the MKIV, because they only use one wastegate instead of two on the CT-12As. OB1, if you can use those CT-12Bs on the 1JZ, you might wanna check your pm. thanks for the information everyone.

-J don't think you can fit the the 2jz turbos in there i think there a little bit bigger and my pea shooter (ct12a) is already touching my firewall

[Frank]

Why are we even talking about the stock turbos? Dude, you're gettin' a single. J/k. Anyone know what the 1jz will do on pump gas with the twins? Big single?

[MK2_1JZ]

Check out this link
http://home.kooee.com.au/celicamad/video.htm

Its a 1JZ powered Cressida that made 274RWHP with the stock turbos, large intercooler, twin dump pipes of the turbos and 3" exhaust.
Frank

www.1jzsupra.20m.com

[jbsupra89t]

is that on stock boost?

-J

[hks1jzgte]

i made 500 rwhp on my 1jzgte with stock turbos at 17psi. posted in street racing magazine. the stock turbos are ct-12 but the 2jz stock turbos are ct-20 they will nto fit without fabbing all sorts of mounts for it. they do not bolt on. if your trying to make gobs of hp from this engine let it breathe big cams, big turbos that is the only way. or you can also do the 1.5 j using the 2j bottom end and 1j top end too bad you loose the high rev limit though.

[Kingsoup]

Thanks jbsupra89t, (smacks himself in forehead) that makes perfect sense!

hks1jzgte thats a helluva lotta power on stock ct12a's, I would surmise that your 1JZ was running non-stock cams and or nitrous?

That 1JZ powered cressida page rates the stock power output of the 1JZ at 199 RWHP I think, what kind of dyno is that measured on? Did someone screw up a Khw conversion from Australia on that one? seems a bit small for a 1JZ.

Also assuming I get a totally stock 1JZ from Japan, what are my options for removing the 180kph speed limiter? Will disconnecting the speedo cable do it? (already done, hee hee) or more accuratly I would figure it cuts at like 6000rpm in 4th, 4000 rpm in 5th? Does anyone know what fuel cut for boost is on the stock ECU?

---------------------------------------
88 Supra Turbo

[jbsupra89t]

takakaira.com has a "speed cut controller" from greddy for like 100 + shipping. that would appear to solve that problem. but i dont know for sure, i dont have one. hope that helps somewhat.

-J

[toypro]

Aussie #'s are always low-don't you guys usally use a different type of dyno, like a mustang dyno or something like that? It's just everytime I see a dyno sheet from down under it always seems low and somebody told me they use a different style of dyno.


Originally posted by MK2_1JZ
Check out this link
http://home.kooee.com.au/celicamad/video.htm

Its a 1JZ powered Cressida that made 274RWHP with the stock turbos, large intercooler, twin dump pipes of the turbos and 3" exhaust.
Frank

www.1jzsupra.20m.com

[Kingsoup]

I'm trying to figure out all details before I attempt this swap so here are a few more Q's, maybe this thread can become a good reference for people who want to do this swap as a good guide does not seem to exist yet.

Assuming the 1JZ you get from Japan does not come with an intercooler what are the options for cheap? Can you use the stock mk3 intercooler? I think the pipes are on the same side, I assume you would have to fab up some custom bends to make it fit but it should work. What about putting a stock mk4 IC on it?

Also I read something about using some Mk4 powersteering lines for the 1JZ. Are these hardpipes that are necessary to run too the steering rack because of the switch from RHD to LHD?

Responses are appreciated!

------------------------------------
88 Supra Turbo

[jbsupra89t]

if it doesn't come with an IC, then takakaira.com has some intercoolers. you cant use the stock mk3 IC with it. as for the endtanks, they are on different sides. now, i have never done this, but this is merely a suggestion: could you get a custom IC with opposite endtanks? perhaps, i honestly dont know. merely a suggestion, and if someone wants to shit all over my suggestion, feel free. :D as for a stock mk4 IC, the stock is a sidemount, and i am not that familiar with it, sorry. and yes, you would need the "main powersteering line" from the mk4 also. yes, that bit about the switch from RHD to LHD is correct. bear in mind, i am CURRENTLY doing the swap, so i am by no means the authority. i dont know everything, i am learning as i go, i am just merely telling you what i have been told, and what i see as i go. i hope i am somewhat of a help to you in your quest (for lack of a better word).

-J

[Kingsoup]

Thanks for the info jbsupra89t, how is your swap coming btw? Did yours come with an intercooler that you can fit? I am trying to figure out all the bits I need to walk into the shop with so hopefully within a few weekends of work I can drive out with a working 1JZ in my car.

I hope to have all the parts lined out on the ground, all lines, wiring harness patched and ready to fly, engine all checked out, powersteering lines that are needed, and crossmember, mounts, ect. I don't wanna buy a huge intercooler right away, just get the motor in their and working, worry about raising boost later.

So here is my list so far.

1JZ motor complete with Harness extended 3 feet
1JZ bellhousing for R-154 adaption
Motor mounts from 89+
Crossmember from 89+
Powersteering Lines from Mk4
Intercooler of sorts, perhaps from donor 1JZ car
Electric Fans for Rad
Throttle Linkage from Mk4 (or make your own, we did on 6MGE)
Oil Pressure sender from 7M?
Other parts from 7M switched over?

What am I forgetting? Lets make the master list

----------------------------------------
88 Supra Turbo

[toypro]

The mk4 throttle cable is only about 30.00-but right now is on backorder-mine's been ordered for two weeks-should be here tomorrow from toyota. You need the high pressure line-it was a bit pricey, like 175.00. This must be from a 93-94 mkiv turbo-apparently some changes were made. My clip came with an intercooler,but it looks to be about the same quality as the mk3, so that would be a good upgrade to do-it would be much easier to fit an aftermarket one like the npr since the ports are opposite-the way an intercooler should be. You can also use your 88 crossmember and mounts from what I've read. Need to use the brackets from the 1j with the mounts from the 88. The wiring is not just as easy as extending the harness-none of the body plugs will plug in-at least on my 89.All were completly different. I spent 3 days tracing every wire on the 1j to make custom "sub harnesses" which,if everything works,will allow for a plug and play type setup in my car. It was a pain it the ass though-I hate electrical work,that might have played into it..It would be easier if you didn't swap the hydrolic fan setup-I'm trying it and I'm not 100% sure it will function right-it has it's own ecu and a seperate temp sensor in the radiator, so if you don't get the radiator, go with electronic fans as it supposidly won't work right without the temp sensor. You'll also have to make custom PS cooler lines, but thats not hard. To get your ac to fit and work, use the 1j compressor-but remove the top plate(4 allen head bolts)and use the one from the 7m compressor-ac lines should bolt up fine(can't say for sure yet-ask me next week:) ) You'll have to use the oil sender from the 7m if you want your stock gauge to work, but the kicker is it won't fit right in-not enough space to go where the 1j sensor is(it's just a switch type sensor-won't work the gauge) You can either go with an aftermarket oil pressure gauge-which isn't a bad idea) or what I did was make an adapter to get it to work. I happened to have an extra greddy EGT gauge fitting laying around(the part that screws into the manifold)same thread pitch as oil pressure port(1/8 npt) I then when to home depot(yep I Lam'ed it) and bought some fitting from the pipe section and made a little adapter-I'll post a picture in a minute of it.It just barely cleared but worked. I should hopefully know next week how everything works out....

[toypro]

oil sender adapter...

[toypro]

intercooler

[Kingsoup]

Holy Kripes! Murder you say? I'm exhausted from work but I will read this better tommorow, thanks for the more info and the pics! Wow looks like someone put in the wrench time.

"The Busta brought ME home"

F&F quotes a plenty when so tired as I.

-----------------------------------
88T

[Frank]

I am going to give this a little bumpy-bump. I have a question. I have calculated that building my 7m will run about $5500 including a lexus AFM and 550's, JE pistons and rings, Crower rods, Suprasport sport turbo upgrade and elbow, 2.0mm HKS stopper type, ARP hardware throughout, timing belt, misc hoses and head and block work. I may be a few hundred shy b/c I am not sure what it costs to rebuild a head. And who knows, I may upgrade the valvetrain if I'm gonna spend that much already. Oh, and about $500 worth of dyno time and tuning is factored in there.

Assuming I can get a 1jz front clip for $2500, I figure about $500 for the bellhousing, $500 for misc belts and hoses and $500 for tuning, that gives me $4000. Then I see above that i have to have several assorted parts off other cars to put the thing together and that probably brings me to $4500.

I can't possibly see myself coming out ahead with a swap, so what am I missing? I purposely excluded the clutch, FMIC, BC, BOV, guages, etc b/c they will be needed for both. So what else am I completely missing?

PS> This thread has been extremely helpful for me. Thanks for the good (I hope! ;) ) info guys.

[OB1JZA70]

Originally posted by supra_89t
I am going to give this a little bumpy-bump. I have a question. I have calculated that building my 7m will run about $5500 including a lexus AFM and 550's, JE pistons and rings, Crower rods, Suprasport sport turbo upgrade and elbow, 2.0mm HKS stopper type, ARP hardware throughout, timing belt, misc hoses and head and block work. I may be a few hundred shy b/c I am not sure what it costs to rebuild a head. And who knows, I may upgrade the valvetrain if I'm gonna spend that much already. Oh, and about $500 worth of dyno time and tuning is factored in there.

Assuming I can get a 1jz front clip for $2500, I figure about $500 for the bellhousing, $500 for misc belts and hoses and $500 for tuning, that gives me $4000. Then I see above that i have to have several assorted parts off other cars to put the thing together and that probably brings me to $4500.

I can't possibly see myself coming out ahead with a swap, so what am I missing? I purposely excluded the clutch, FMIC, BC, BOV, guages, etc b/c they will be needed for both. So what else am I completely missing?

PS> This thread has been extremely helpful for me. Thanks for the good (I hope! ;) ) info guys.

1JZ conversion Archives (http://groups.yahoo.com/group/MKIIIJZA70/)
If you get the front clip it should include the bellhausing. So that is 500.00 saved. The hoses and extras shouldn't run you now more than 300.00. I got Elvis 87 together for roughly around 4000.00 including storing his front clip in storage for a few months.

Eric, Can you send me a couple of the oil sending unit adaptors? I am in need of 2 right now. Thanks.

Orin B Sr

[OB1JZA70]

Originally posted by supra_89t
I am going to give this a little bumpy-bump. I have a question. I have calculated that building my 7m will run about $5500 including a lexus AFM and 550's, JE pistons and rings, Crower rods, Suprasport sport turbo upgrade and elbow, 2.0mm HKS stopper type, ARP hardware throughout, timing belt, misc hoses and head and block work. I may be a few hundred shy b/c I am not sure what it costs to rebuild a head. And who knows, I may upgrade the valvetrain if I'm gonna spend that much already. Oh, and about $500 worth of dyno time and tuning is factored in there.

Assuming I can get a 1jz front clip for $2500, I figure about $500 for the bellhousing, $500 for misc belts and hoses and $500 for tuning, that gives me $4000. Then I see above that i have to have several assorted parts off other cars to put the thing together and that probably brings me to $4500.

I can't possibly see myself coming out ahead with a swap, so what am I missing? I purposely excluded the clutch, FMIC, BC, BOV, guages, etc b/c they will be needed for both. So what else am I completely missing?

PS> This thread has been extremely helpful for me. Thanks for the good (I hope! ;) ) info guys.

1JZ conversion Archives (http://groups.yahoo.com/group/MKIIIJZA70/)
If you get the front clip it should include the bellhausing. So that is 500.00 saved. The hoses and extras shouldn't run you now more than 300.00. I got Elvis 87 together for roughly around 4000.00 including storing his front clip in storage for a few months.

Eric, Can you send me a couple of the oil sending unit adaptors? I am in need of 2 right now. Thanks.

Orin B Sr

[kalium]

Originally posted by controler
I am fairly certain that the max you'll get out of 12a's are 22 psi. I don't know where the specifics are, but they lose efficency there, so most guys keep them at 19-20 psi. As for the injectors, I know jspec 2jz's came with 430 cc, so I would assume the 1jz's are similar.


You have GOT to be kidding...22psi? NO FARKEN WAY

[HedgehogSandwich]

Jees theres a lot of wrong info flying round on this thread...

anyway, the 1JZ uses 370's.... nad id aggreee theres no way the stock CT12's would hit 22 psi... they're just too damn small.

[Majik16106]

but what about the hybrid set up, swapping in the B compressor wheels and shafts, doing a little clip and porting. Wont they take 18-19 then? I thought I read someplace that someone almost made 500rwhp on the hybrid ct12s with some extra work. 470-480 maybe...? and you wouldnt need the 550cc injectors for that.. you could use Jspec 440s right?

[vxturboxv]

What is the big deal about extending the stock wiring harness?

My friend just got a sheet of alum and made a bracket to mount it on the right side of the car under the hood. Why bother bringing it in the car? Put a plastic bag over the damn thing and mount it. It can go anywhere!!! Right? I may be wrong but my friends car works just fine. Computer could be mounted upsidedown on the freek'n hood if it has to be. I'd much rather do that than spend 800 on extending it. Just my .02 correct me if I am wrong please.

My buddy did his entire conversion with the front clip he ordered from nippon.(+ the throttle cable) Mind you this clip cost $4000 plus shipping!. But I'm sure he just got raped on the price and it is no different than the front clips U use.

SO WHERE DO ALL YOU GUYS GET THESE CLIPS SO CHEAP!!!!?:mad:

HELP US all out! PLEASE! Everyone brags about how much they get the clips for but noone tells us where? The more cars we build with 1jz's the more the demand for parts will be and lower the prices.

Thanks
Adam

[Majik16106]

your wrong in a couple places adam, no flaming, just correcting. You can check the 1jz sticky faq for more info. first extending the harness is free, 700 is for the custom made one. Second, its not just an extension, it has to be mixed n matched. The 1jz engine harness wont match up to the 7m body harness. thats the problem. stuff like your gauges, fan, tail lights, relays.. yadda yadda. So thats the problem. I dont know how your friend did his, but he couldnt have just extended it unless he transferred all the 1jz body harnesses, but that would mean taking the ac control, gauge pod, stereo, etc out of his clip, and thats kind of pointless, its a lot harder than it sounds.

[HedgehogSandwich]

Adam - theres a reply on ******** about this.

Toy-pro - i think youre right about the BHP figures.. i think you lot in the US have higer quoted figures than other countries for bhp. From what i can tell a 550 bhp US car relates to a 450 bhp UK car or Aus car or thereabouts... actual power is the same, just different reference.

Majik - its entirely possible for hybrids to produce the figure youre quoting.. it depends on the build..

[mbirie]

I guess I am assuming with less displacement, you'll need less fuel for a good air/fuel mixture. I know the 1j makes 50 more horsepower stock and has smaller injectors than a 7m(370vs440) the 1j guys don't seem to upgrade until higher in the horsepower levels than the 7m guys.I could be wrong, I am 90% sure that a 1j that layed down 600ish not long ago was running 550's, which I don't think you could get away with on a 7m..

I think your right on that. The larger displacements have larger torgue values. Peak torque is max cylinder fill wich would take more fuel to balance the air fuel ratio. The high horsepower comes from higer rpms.

[raysupra]

dont post on 8 year old post.

[Haze<3Supra]

Holy 8 year old bump, batman.

[supraracer01]

I think your right on that. The larger displacements have larger torgue values. Peak torque is max cylinder fill wich would take more fuel to balance the air fuel ratio. The high horsepower comes from higer rpms.

and THIS was necessary???

[Twin2Turbo]

and THIS was necessary???

haha!!

[TaSe]

HAHAH Jesus i started reading realizing fuck this thread is old

[Haze<3Supra]

and THIS was necessary???

It was absolutely necessary! He's been waiting 8 years for someone to respond to him, and now he can finally rest easy.

[Kingsoup]

A mere 8yrs ago I made this post? turns out people run 360rwhp with 2jzGTE cams on stock CT12a's though, I still am hunting importing my perfect JZA70.

[Twin2Turbo]

haha wow