Best Twin-Turbo upgrade

17801 Views 25 Replies 9 Participants Last post by theman, Oct 30, 2001

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Discussion Starter · Oct 28, 2001

Could someone tell me what the best twin turbo upgrade would be? And this would be applied to a streetable Supra, not a strictly track Supra. So I need it to spool semi-fast....I do not want much lag.

Thanks,
Dave

at:

1 - 20 of 26 Posts

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Discussion Starter · #2 · Oct 28, 2001

It's really a personal preferance.

I would put 3037s on my Z if I could. Lag isn't a big issue since power is always a downshift away.

for a relatively small twin kit you could upgrade the stock CT-20 turbos with CT-26s and keep the sequential system. For something a little bigger you could go with a twin TD05 16g or HKS 2530 kit. These 2 kits are very common for 300Zs but I'm sure they can be adapted for Supras also. There are also quite a few daily-driven street Supras with 2835 kits. These kits have considerable lag, but make enormous power.

Is there any reason you aren't considering single turbo kits? There are MANY more options with single kits than twins.

pooshda

· #3 · Oct 28, 2001

Id like to see a Twin SP57 actually... two fast spooling turbos would be one, significantly less laggy twin setup which would still produce some very decent power I would imagine.. Others want to see it as well.. Id gladly be the Guinnie Pig (sp?)

G

Discussion Starter · #4 · Oct 28, 2001

I have taken note of all the options in the single-turbo upgrades, but want to stick with what the car was created as. I am also intending to place my car into shows, and since everyone uses single turbos, I do believe my car will be an eye-catcher. Has anyone heard anything special about the K3T twin setup by Blitz?

Now as complete body-kits go, which should I choose?
ABFLUG S900
TRD Widebody
Veilside Limited Edition

Dave

Z from Japan

· #5 · Oct 28, 2001

hmmmmmm

I think for a street Supra that was twins hmmm.....

I would say a twin 62-1 T04B/T3's with a medium sized exh housing and a stage 5 wheel. They should run you around $1600 for the pair. If you had enough money, go ahead and get the BB option.

They should max around 750hp with a very quick spool. The comp housings have a 4" inlet like the "big" T series turbos, T61 - T76. That would make a mean visual effect.

controler

· #6 · Oct 28, 2001

If you like the spool up time of the stock turbos, you could have them sent out to get a new compressor wheel. It's the least expensive solution, and can support big horsepower gains. I think majesticturbo would do it, as well as any other reputable turbo shop. Although it won't be exactly for a show car, but that would be the method I would go with.

BoostedToy

· #7 · Oct 28, 2001

I always thought the stock MKIV TT's were CT12's, could be wrong on that. I am going to have to disagree with you about putting the CT26(MKIII turbo's) and utilizing the stock sequential system. I seriously doubt that twin CT26's would bolt onto the manifold. If it were the case that they did, EVERYONE should be doing this, seriously. The CT26 is a fairly large stock turbo. I know for a fact that the housing is much larger than a T25(16g mitsubishi) used on the DSM's. The CT26 dwarf's the stock twins used on the MKIV's. If this twin CT26 setup would work on the MKIV's, it would be a very very good upgrade. you can take CT26's and send them off to Majestic Turbo and have 60-1 wheels put in. This would be MAJOR flow. I would say this setup would be good for 600rwhp, no doubt about it. Even stock CT26's you would probably make 500-525rwhp at 20psi. CT26's would be good for about 14-15psi each. Outside of this they are just blowing hot air, but that would be 28-30psi on these puppies, and big hp at 200 per turbo...

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Discussion Starter · #8 · Oct 28, 2001

BoostedToy said:
CT12

I know that the Jap. Spec Supras had CT12Bs but I always thought the Amer. spec Supra had CT20s.

Does anyone know for sure?

I'm pretty sure that the CT26 upgrade is posible. I remember talking with a Supra owner here in Austin who claimed to have upgraded to twin CT26s.

BoostedToy

· #9 · Oct 28, 2001

I still don't see how it would work...you'd need a different manifold i'm pretty sure. I dont think you realize how much of a difference size wise there is between the CT12/20's and the CT26's. There is a significant difference. These turbos may be able to work in a true twin setup...but as far as the sequential goes i doubt it. The CT26's from compresser inlet to where the downpipe elbow connects to the exhaust side...is probably at least 2" longer...this would cause major clearance issues since the stock twin setup on the MKIV's have the turbo's exhaust sides back to back and are lined up like that. If someone could make it work though, i would definitely buy the kit if it were cheap. Two CT26's would be big power. I saw an article in a japanese magazine where an MKIV was running on twin CT26's and hit 212mph(gear limited i think) and was making a little over 600rwhp.

Anybody with info on possible usage of twin CT26's on MKIV's due tell!!!

G

Discussion Starter · #10 · Oct 28, 2001

The twin 62-1 T04B/T3's with a medium sized exh housing and a stage 5 wheel sounds like a good idea to me. I'm all about the freaky visual effects. Thanks for the ideas. If anyone else has any other unique ideas, be my guest to tell me what to choose...I have the money and time to spare...so I'll be the guinea pig for now, then tell you how everything works out.

Thanks for the idea Z

Dave

2JZFAN

· #11 · Oct 29, 2001

Even though this was my idea first I'll post my findings, basically it's an HKS 2535 kit. All the HKS XXXXr kits have significantly more lag over the XXXX kits the "r" makes a difference. Anyhow the 2535 kit is ideal because it's estimated at making 620rwhp estimated on basic mods and spools like crazy almost with zero lag I was told. So the only thing is to put that on a supra it requires some welding and a custom DP. But take the car to SP engineering whom I have been talking to and they'll help ya out. What you need is the HKS starter kit (includes header etc etc.) then you purchase the turbos 2535s separately. Then boom you have the first killer TT upgrade car stole my idea and started the next trend in supra performance before I could get a chance

heh good luck brotha!?!

G

Discussion Starter · #12 · Oct 29, 2001

I see your point about the size. Here is a picture I found of a Toyota Celsior with a 2JZGTE and twin CT26s. This is definately not what was under the hood of the person I talked with.

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Discussion Starter · #13 · Oct 29, 2001

US Supras use CT12s

The US Supra use CT12s (US CT12C and Jap CT12B) aswell but they are different spec from the Jap model. The US model uses steel turbine blades instead of ceramic and while the Jap model spools up significantly faster (and provides more Torque lower down in the RPM range) the US turbos have a much better top end. The US turbos are a popular fit for Jap Supras in Australia and I suspect UK.
Andrei

BoostedToy

· #14 · Oct 29, 2001

I'd love to someone make a twin CT26 kit for MKIV's. The CT26 is very reliable as well.

G

Discussion Starter · #15 · Oct 29, 2001

"Anyhow the 2535 kit is ideal because it's estimated at making 620rwhp estimated on basic mods and spools like crazy almost with zero lag I was told."

??????????????????????????

I talked with few people who have said due to the size of the HKS 2835s, the lag was tremendous.

Not your T100 lag, but still, you understand the point...and the only way to reduce the lag was to introduce nitrous. I will add nitrous to my car, for looks, but never for use! Perhaps they were speaking of their ass, but that is what I was told. My car will be virtually completely HKS, so if the 2835 does spool fast (very fast), then that's definitely what I will go with.

Dave

G

Discussion Starter · #16 · Oct 29, 2001

Re: US Supras use CT12s

SoupraTT said:
The US Supra use CT12s (US CT12C and Jap CT12B) aswell but they are different spec from the Jap model. The US model uses steel turbine blades instead of ceramic and while the Jap model spools up significantly faster (and provides more Torque lower down in the RPM range) the US turbos have a much better top end. The US turbos are a popular fit for Jap Supras in Australia and I suspect UK.
Andrei

cool, thanks for correcting me.

2JZFAN

· #17 · Oct 29, 2001

Why did you qupte what I said? When I say 2535 I mean HKS 2535's not 2835's. The 2835's spool faster than the 2835R's but either way the 2835's are still slow spooling. Also lemme say when I say zero lag I was told zero lag if not less compared to stock turbos. Clarify what you mean by the way..

WhiteS97 said:
"Anyhow the 2535 kit is ideal because it's estimated at making 620rwhp estimated on basic mods and spools like crazy almost with zero lag I was told."

??????????????????????????

I talked with few people who have said due to the size of the HKS 2835s, the lag was tremendous. Not your T100 lag, but still, you understand the point...and the only way to reduce the lag was to introduce nitrous. I will add nitrous to my car, for looks, but never for use! Perhaps they were speaking of their ass, but that is what I was told. My car will be virtually completely HKS, so if the 2835 does spool fast (very fast), then that's definitely what I will go with.

Dave

KERR

· #18 · Oct 29, 2001

i know mayo did 545 or 575 with a SP57, so too of those would be NICE!

I also want twins just cause they look good.

SpEed^DeMOn^

· #19 · Oct 30, 2001

hks 2535

If you don't mind me asking; how much does the hks 2535 kit cost?????

2JZFAN

· #20 · Oct 30, 2001

Well there is no kit, basically these are prices from the hks pages but like $5k for the starter kit (ie. header and others etc etc) plus like $2.5k per turbo. I guess from the book it should be about 10 grand but if you actually priced it from a seller it should be less. Also it needs a custom DP and some welding, but I bet it's worth it..

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