go non vvti twin turbo

Trev

 

how about non and make life easy.

 

Elaborate please? If theres no significant difference from BPU power levels I'm leaning towards the 96 vvti model because its newer/less mileage and I like the redesigned front bumper...I'm only going for BPU and maybe modifying the stock turbo(s) nothing crazy

I used the seach button but all I founded out is the vvti ECU is hard to tune in higher HP like 500+ Is the vvti ECU that much of a hinderance?

 

bumpy

 

if you want 7m type torque get the vvt-i...it gets max tq by 2400rpm...

1JZ-GTE VVTi 280 hp @ 6200 rpm
378 Nm @ 2400 rpm

1JZ-GTE 280 hp @ 6200 rpm
362 Nm @ 4800 rpm

http://www.supras.nl/view.php?page=modsEngineReplacement.htm

 

I'd go vvti, i am pretty sure they are actually putting more power out of the box than the non vvti. Kinda like the real power ratings on the 2jzget vvti aristo.

Used parts from japan are easier to find for the non vvti engines though.

the vvti models also run 9:1 compression compared to the 8.5:1 of the non vvti, so that may factor into your decision also.

 

how about tunablity? is the vvt ECU gonna be a pain in the ass even though I am going to go BPU? I heard the ECU resets everything after tuning with a piggyback

 

bump bump bump

 

Hey man,

if you are just going BPU i'd say VVTI for sure!

Can't go wrong. if you plan on going further go for the older one

 

May want to ask on the celicasupra forum, they have quite a few more vvti swapped cars than this forum. I asked the same question, and the few that replied said the vvti.

 

Looking for High HP, go old and go single. VVTi is harder to tune for high HP unless you standalone.

 

thank you thank you!

 

If you are just bolting on intake/exhaust/IC then I'd go with the single VVTi.

They changed it for a reason.

Technology is not a bad thing...

 

yes the more i learn about the vvti 1jz, it seems like it could make decent power with a PFC piggy back ECU and a bolt on upgraded turbo (forgot the name of it) to replace the CT26
thanks for the pros and cons!

 

I:m pretty sur wethey use a ct20b not a ct26

 

the stock turbo on a vvti 1jz is a ct26......95% sure one that.......

 

I've seen a lot of Apex'i Power FC's for the vvti 1jz-gte motor on ebay lately from AP engineering. You should be able to tune it really well with that.

Power FC

 

My mistake, its a ct15b. It definately is not a ct26.

 

btw, TRD makes a upgraded turbo for the VVTi still. It bolts onto the stock manifold. Too bad they dont have anything like it for us...

 

Due to ceramic turbine the safe boost up is limited to 1.2 bar and can only make about 320 hp. So if you like bpu go with non-vvti version. Boost the stock twin to 1.5 bar and you make 400 hp.

 

Resurrection =)

Anyways, i plan to do a 1jz swap as well and was wondering which i should go for. I'm not looking to make crazy HP, just something that is reliable, but can haul ass at the track. I'm interested in the vvti because of fuel efficiency, compression ration, early torque, and the fact that most haven't been abused. the vvti's are cheaper, also fuel efficient, and easier to find parts for. The current upgrades i have on my 7m is a 255lph fuel pump, 3in IC with 2.5 IC pipes, hks bov, LEX AFM, and apexi air filter. i plan to use all of them for my 1jz swap, except for the obvious parts like sparks plugs, spark plug wires, etc. How much more is the vvti compared to the non vvti? For my use, is the vvti the better choice?

 

seriously dude you had to bump a thread that was 6 years old

 

I'd get the VVT-i then again I am biased and went with the 2JZ-GTE VVT-i. For the most part the VVT-i swaps follow the same rules as the non VVT-i swaps with reguards to the engine mount brackets, oil pan sump and, water pump / fan system.

Diffrerences are.
The ECU pinouts but I have seen the 1JZ VVT-i pinouts somewhere online.
They require MAFs but the 1JZ VVT-i MAF corresponds to the 1UZ MAF so you can pick it up on eBay or off a wrecker.
The VVT-i's have a partial DBW tb (like the IS300) but this really means nothing to you because they still run a traditional TB cable.

Pro
VVT-i
Single Turbo on 1JZ VVT-i far surperior to older twins
newer engine

Con
MAF so a vent to the atmosphere BOV isn't advisable.
1JZ VVT-i has a different flange pattern which limits your choice in aftermarket manifolds.

 

What's DBW?

i was thinking of upgrading my ct26 and using it on one of the 1j's. The shop also does custom metal work. i would use the stock manifold but just weld in a a flange for the ct. I heard vented BOV's are not good with a MAF, but i had no problems with my 7m in terms of vacuuming or compression. Has anyone used an upgraded 57 trim ct26 on a 1jz vvti or non vvti?

These are the guys that would be doing the swap. I went there to see it in person and it was no joke. They had plagues of two mk4's that came out in magazines. they also a bunch outside along with a viper and a lotus. They're a little expensive, but have a very good rep.

http://www.e-shiftperformance.com/home.php

 

Drive-by-wire or as Toyota called it ETCS

http://www.youtube.com/watch?v=fQSfJgjDjwU

some people get it confused with "true" DBW that Toyota uses currently

http://www.youtube.com/watch?v=6bvH9Sv7GkQ

this is another good video to watch

http://www.youtube.com/watch?v=BlD42hYETmA

I'm pretty sure the 1JZ VVT-i manifold is clocked downward so there isn't a lot of room for a turbo even if you changed the flange on it.

 

Drive-by-wire or as Toyota called it ETCS

http://www.youtube.com/watch?v=fQSfJgjDjwU

some people get it confused with "true" DBW that Toyota uses currently

http://www.youtube.com/watch?v=6bvH9Sv7GkQ



this is another good video to watch

http://www.youtube.com/watch?v=BlD42hYETmA

I'm pretty sure the 1JZ VVT-i manifold is clocked downward so there isn't a lot of room for a turbo even if you changed the flange on it.

Those vids were great dude, it just made things a lot clearer for me. It also made me want the vvti more lol. I was suggesting the change of the flange to accommodate my ct 26. Would it be more economical to go straight to a new t3 turbo pair with a t3 manifold? That way i can sell my ct26 and part out with my 7m.

 

in the 1JZ-GTE VVT-i family ... only the JZX110 is fly by wire ... AFAIK the JZX100's and JZZ30's are not ... also the turbo on the VVT-i model is a CT-15 ... not the crappy ct26

 

the ct15 is better than the ct26?
Please elaborate on the jz's.