With that said, I don't quite understand the attraction to the JDM 2JZGTE opposed to the USDM 2JZGTE. Wouldn't the USDM provide better upgrade opportunities and create less stress finding parts?

 

Any proof of this? Because I've heard otherwise from numerous of sources. Unless you own the JDM 98+ Aristo, Supra motors how would you know? Even then it's a pain in the *** to take out the stocks.

Not to mention, I thought pre 98 JDM GTE twins were CT12B.

It's rare to find a USDM GTE. Even if you find one it will have a lot of miles....

JDM 2JZ-GTE VVT-I motors have a higher rated HP and 20lb-ft more torque than the USDM GTE. Also a bit more suitable for daily driving because of the VVT-I.

Getting tuned this week and upping the PSI to 18lbs YAY! Wish me luck!

P.S. After I install a Greddy Speed Cut Defender imma bring her to the track. Hopefully beating Jeff's 450WHP 12.9 sec @ 1/4 mile on single turbo setup. I am going to do it on my STOCKERS.!

 

all sources i have every recieved info from have said that ALL JDM twins are ceramic, which is the reasoning for the USDM twins being so popular. The same sources also point to the fact that the year discrepancy is the difference between the pre 98's being non-VVTi and the post 98 being VVTi (which is why the 98+ are desirable for the GS because there is less wiring involved when not trying to delete VVTi.

 

dont forget fuel cut controller, that would be embarrassing.

also, i do wish you luck, but am pretty sure you won't be able to put that much power down on stock twins....otherwise why would these guys shell out $4k+ for a single setup?

 

They aren't. JDM Aristo turbos use a steel wheel and are slightly larger than U.S. spec turbos.

You aren't going to make 450whp on the stock turbos at 18lbs. A 12.9 does leave alot to be desired but sounds marginally slow for a car on stock stall and really slow for a car with an upgraded stall. Remember that Jeff has never dynoed his car, all the power claims he has made are based on his personal estimate of what it feels like so you really can's base anything off of his times.

 

I was not trying to blatantly call him out on it but now that you say it, I guess I am. If he was pushing 450WHP 12.9@1/4 mile is sad....And there are BPU supras who have done high 470+WHP on stock twins...I didn't claim I would be making that much on stocks, I was just simply saying I am going to try and beat his 1/4 mile time on stocks.

I am running a piggyback AEM FIC on my car it deletes the boost cut.

 

BTW: CT20A are ceramic and are larger than USDM gte twins.

 

Jason, SlvrGS300 has done a 98+ Aristo swap into his GS. That is how he knows.

 

High 470whp isn't average on a bpu supra, especially an Auto (I owned a 6spd TT for 5 years) though it is possible (Hagen broke 500whp).
I didn't go back through your post to check if you have already done the injector swap but you won't be able to safely make over low 400's on the stock injectors. You may want to look into swapping in the Usdm injectors and a resistor pack (not sure if it's needed with the Aem) to give a little more fuel.

In my opinion the Vvti motor does not respond as well to mods as the non-vvti gte. The only major difference between them is the head and I would guess that the cam profile is less aggressive in the vvti motors just as the previous gen non-vvti motors are well known to have considerably less aggressive cams than Usdm cars. With full engine control (Fcon Vpro) you are able to alter the stock cam timing profiles which should produce considerable gains but again, I haven't tested that though I would expect to see considerable gains, especially on singled cars.

Either way, good luck on your project!

 

After further research and taking a close look at the turbos. SlvrGS300 is right, The Aristo CT20As are steel shafts and larger than the USDM GTE. Although the turbos are not marked with the model number.

 

I'm not saying you can't get high numbers off us spec twins but I think you had mentioned something about mid to high 300's on 14 psi? I really doubt that. Just from my own experience i swapped over to us 550 inj and us spec twins in ttc with safc2 and on 97pump did 358rwhp on 17psi. I've heard of people getting a lot more but haven't seen any dyno sheets to prove what they say. You find that a lot of people claim certain hp more based on thier butt dyno than an actual dyno test. Good luck with your project.

 

Well I can't prove it now because I just tuned it with AEM FIC and raised boost by doing a VSV mod on top of the wastegate spring mod now im at 20psi holding pretty strong to red line. My Greddy Speed Cut Defencer should be coming in soon so I'll get that wired in and throw it on the dyno and take it to the track. And post up the numbers.

But again it was just my predictions it could be less. But I know defiantly if I had a manual tranny I would be pretty close to mid to high 300s.