thanks

 

i know with the stock setup you can adjust the wastegate and it wont taper as much. Not too sure if that will work with your setup though.

 

[quote=.MM;7883220]My car spikes to around 28.5 psi at 4k RPM with my FP Red and then slowly tapers to around 22.5psi by 7800 RPM.

How can i get the car to hold more boost or not taper?

thanks

Matty[/quote
try a good electronic boost controller brother.

 

The only true answer to this question is turbo upgrade.
The stock turbo cannot make and then sustain 28psi to the rev limiter, period.

 

He already has a FP Red.

 

I am tuning a FPRed... tapers to 27-28 PSI by redline. Even with 3 port solenoid maxed out Kelford Stg2's. Full cutout in TP. All other supporting mods.

 

I have heard many with the FP red having this issue. GL with finding the solution bro

 

my 8 with fp red taper to around 25 too with the hallman bc. After installed greddy profecB, problem solved.

 

I don't know why I put stock turbo, I saw Red.
IMO, the only way to hold 28psi to the limiter is a bigger turbo than the Red (a 35R would do it, LOL).

My point was that its the physical limitations of the turbocharger that are making it taper.

 

my 08 X with stock turbo redline at 25psi then taper to 20psi, not bad for stock turbo. Gotta be from the greddy ebc.

 

Upgrading to a very stiff WGA spring would help a bit (might also cause boost spikes) as well. Upgrading to a EWG would help a bit and a tubular exhaust manifold should help that.

Otherwise, I say your best bet is to upgrade to a 3 port solenoid to hold more boost up top.

 

and electronic boost controller should help but as some say you need i a bigger turbo

 

boost controller is not going to be able to change physics, so I'm not sure why you guys keep recommending an ebc like it's some magical device.

 

I think Goofygrin meant to say that a boost controller is Not going to change physics.

 

HAHAHA thanks, ya that's what I meant lol