Loseing Power at High RPM's

[Peter's Eclipse]

my 2gen gsx loses power at high rpm's. when the turbo kicks in it has alot of tourqe at around 3,000 to 5,500 then it slowly loses tourqe. do you guys have an idea what might be the problem? these are the mods i have in the car, dejon tool upper i/c pipes, greddy boost controller, hks cat-back, act clutch and flywheel, autometer gauges (boost, a/f ratio, and oil pressure), msd 8.5 spark plugs wires and a warblo 255 fuel pump(not installed yet) the car is running at just under 15 psi.

 

[5150DSM]

The T-25 does not have much of a top end to begin with but at 15 psi you should pull to redline(or near it anyway) It sounds more like you may be running lean up top and having some timing pulled. Do you have any datalogging capability for timing and fuel trims?(not the A/F gauge) The exhaust, intake and upping the boost may have increased airflow to the point that the stock pump and/or injectors are not capable of providing the necessary fuel at WOT. Re-wiring your stock pump may give you a little help but you can't be sure without datalogging. It probably is not a good idea to install that 255 without an AFPR as that will probably overrun the stock FPR and make you run pig rich giving you a different problem. My suggestions: get an AFPR and larger injectors and install them with the 255, of course then you will need some form of fuel control. Turn down the boost until you can get the proper fuel mods. Most importantly, get some sort of datalogging capability, better yet, get DSMLink if you can. Good Luck.

 

[blcknspo0ln]

:laugh: its cause you have the t25 :laugh:

its general knowledge the t25 loses steam after 5500 rpms. nothing is wrong, its just how the turbo is.

upgrade to a 16G or higher if you want to keep boosting til 7k if not.. shift at 5.5k - 6k for max power