performance expectations

[wildriceracing]

I have just completed some significant work on this car (see my profile for details) and it has dyno'd at just 250 whp. The crew says the turbo is only pushing 8 psi (max) because the 2.5" turboback with a stock cat will not let it push any more - restricting my whp. Does this sound accurate?

 

[nine5raptor]

no, unless it is clogged.

stock psi is 11.

do you have a boost controller on there? I didn't see one in your profile.

 

[1fast97gsx]

sounds accurate to an extent. Get a boost controller and crank it up. Put a test pipe or at least hfc on there and if you have the money go to a 3" exhaust setup.

 

[Mike 99GSX]

Please tell me I'm reading your profile wrong. Do you really have a 54 trim turbo with a 255 pump and 660s and no way to control fuel? Yikes

 

[wildriceracing]

Thanks. I do not have a boost controller yet. They are telling me to get a 3" cat and catback first. I had expected to be getting 350+/- whp after the current mods. Was that realistic?

If I can get general concurrance this is a requirement, next steps would be to add 3" cat (Random Tech) and catback (Tanabe?) and Apexi AVC-R, but wold rather not just throw money at it if it can be fixed with better tuning.

Thoughts?

 

[wildriceracing]

Originally posted by Mike 99GSX
Please tell me I'm reading your profile wrong. Do you really have a 54 trim turbo with a 255 pump and 660s and no way to control fuel? Yikes

(I'm still learning, but..) the DSMLink should handle fuel management, correct?

 

[Mike 99GSX]

For the price of an AVC-R, you could get a manual boost controller and an AFC. You need a way to control your fuel. You can't just run 660s on a stock ECU without lowering airflow signal.

 

[wildriceracing]

The DSMLink (not previously on my profile) should handle that, correct?

 

[Mike 99GSX]

Originally posted by wildriceracing
The DSMLink (not previously on my profile) should handle that, correct?

Yes

 

[Zenja]

Obviously, crank up the boost. Once you do that you should see good results assuming you're tuned properly.