Sharif,
you tested the aps tt kit to 650whp. Was that with the standard aps fuel system and other inj. or a complete other fuel system

 

you can't produce that much power with the stock aps fuel system. you need bigger injectors.

 

yes i know, but is it enough to just change the inj.

 

You need larger fuel rails and might as well do a return fuel system while your at it around 450-500 rwhp.

 

The turbochargers, theory, are good for 40ft/min worth of airflow...each. This equates to roughly 800 crank hp. Given the drivetrain losses, I would expect a max of 650-700whp, depending on the dyno.

 

On my personal car I will be keeping the standard APS TT kit and try to see if we can make 700rwhp on these turbos. My engine will have the 3.8L stroker kit so it is very close to a 3.5L engine ( and basically the same displacement as a built 3.5 with 100mm bore on the pistons). I know the actuators are going to be a problem at high boost and we are going to see what we can do to fix that.

I will be running the CJ Motorsports Stage 3 fuel system with HKS 1000cc injectors incase anyone is wondering about the fuel setup I doubt think we will have a problem of hitting the high 600s to low 700s on my car. (Hopefully

Will keep you guys posted

-George
GT Motorsports

 

George, have you considered converting to external wastegates? From what I've gathered on the forum, the manifolds on the extreme kit are physically the same as the standard kit with the exception of the wastegate flanges. If that 's true then all you'd have to do is buy the extreme manifolds and weld the flappers shut on the turbos and you'd have an external setup. I think you'd be doing a great service to all the standard APS TT owners looking to make big power if you try the conversion.

 

We are currently looking into a few different options on convert the standard kit to external setup on my car, There might even be a "kit" for sale to do this if you are not local. Stayed tuned for the progress on my car

-George
GT Motorsports

 

Sam,
We already tried this..Thoes internal WG's need to go..We could never hold 18+ PSI to redline, even with the upgraded actuators..We creeped just over 650 last dynos we did, bet we wired the actuators shut and got dangerously lean with our current fuel system..
We since scrapped the idea and decided to go twin GT35's.
PS you get my new purchase order?

 

Hey Julian,

I will check with Sam on the P.O. We will more than likely end up converting my APS TT to a External Setup as you said boost is going to be hard to maintain at these high levels.

Thanks for your input!

-George
GT Motorsports

 

IMHO, those Turbos are blowing hot air after 18psi anyway..
Ps have sam call me tonight to confirm the po.

 

Thats not what I wanted to hear

Guess we will have to find a way to make 700 @ 18psi

I really don't want to change my turbo kit right now.....

I'll pass the msg, take care

-George
GT Motorsports

 

Cool. I'm going to follow your progress like a hawk.

 

Good luck George.

If I may ask, why the 3.8 instead of bigger? I'm sure there is a reason. Thanks!

 

Well there are a few reasons,

-This will be the FIRST GTM 3.8L Stroker
-Maintain more "meat" on the block ( 95mm bore vs 100mm )
-Able to use HKS Headgaskets since it will be a smaller bore
-Engine will be more of a "revver" than the 4.2L stroker
-Much larger turbos are needed to take advantage of the 4.2L kit
-Interested to see the results

Turbos should spool very quickly with this engine!

-George
GT Motorsports

 

Nice. I am also looking to maintain my APS TT kit no matter what kind of build I do (I just like the spool-up-ness lol). So if the results are awesome then I will seriously consider the 3.8L option.

Good luck!

 

My car is into the 500's, but the highest legitimate numbers I have seen are from MrTomcat at over 600 (as was previously posted)

If you're intention is to go over 500, get the extreme kit because of the EWG, big test pipes, and fuel system that are included with the kit.

 

a 3.8stroker wow, your beating nissan to there own engines. It will be funny if the 3.8RS engine comes out and it pulls up to a 350z and its like yea i got a 3.8 aswell buddy lmao. Nice man. I wonder what the 3.8strked engine would produce NA.

 

VERY, VERY interested in this as well.....

 

I really want to know how to solve the problems of the APS TT kit turbos on very high boost. I am planning on using them on my built block for 600rwhp. So this would be very nice if this problem of the IWG would be and can be solved. You got my vote