EVO3 mods question

[gotboost2ggst]

I have a 2g gs-t and I have these mods EVO3 turbo walbro 255 fuel pump greddy type-s bov injen intake greddy turbo timer Apexis N1 exh autometer boost gauge now here the Question I want to know what other mods do I need to do to make 350hp on my evo3 turbo

[joemathews]

-Pocketlogger and palm
-SAFC or SAFC II (or DSMlink instead of both the logger and safc)
-cams
-port the shit out of everything
-fmic or much bigger smic
-intercooler piping
-660cc injectors (you may be able to get away with 560cc evo injectors, but 660s are a safer bet)

That should just about do it with good tuning. Your car must be running very well as well.

>>EDIT: and something to control boost with

[scottsee]

forgot the afpr
boost controller??
ps. if you get new cams i strongly suggest getting new lifters. veary important to have new lifters with new cams. dont forget to soak the lifters in new oil overnight before installation.

[97_3clipse]

fuel pressure regulator..?

[joemathews]

afpr=adjustable fuel pressure regulator

[joemathews]

afpr=adjustable fuel pressure regulator

You can run a 255 lph without one, but some claim the stock fpr is overrun with pressure (many people run without an aftermarket fpr though...I might be one of those people someday )

[kjewer1]

To clarify, a 255 of any sort WILL overrun the stock FPR. The question is do you have the tools to observe the overrunning, and even if you do, do you care

Edit> On a 2g, even with a AFPR 99% of the time you will overrun the stock return line as well. Run a 4 dollar 5 foot length of 3/8th brake line back to the tank, and use all 3/8th rubber hose. Stock stuff is ~1/4 inch.

[guitarXgeek]

Is there a certain defined point at where the stock FPR is overrun? Like, is there a specific pressure/flow that will begin to overrun the FPR? I'm asking because I'm curious if I need an AFPR with a rewired 190lph that I'm putting in soon.

[kjewer1]

In my experience a 190 is pushing the limits of the stock FPR, but its well within the ECUs ability to compensate. I don't think its necessary.

There is really nothing between the 190 and the 255, so it really just comes down to no for the 190 and yes for the 255. Cars will cary slightly with the bosot pressure where the FPR takes over again though, but it tends to be between 5 and 15 psi. Once fuel pressure is over the "creep" pressure (FPR over run is the same thing as boost creep. Call it fuel pressure creep ) it goes back to the correct base pressure across the injectors.

Edit> For example. A 255 and stock FPR gives you a base fuel pressure (hose off) of 55 psi. On your 2g (for this example) you should have 43 psi (1g is 38 psi) base pressure. So Fuel pressure will always be 55 psi, until boost gets over 12 psi and it rises 1 to 1 with manifold pressure. Lets say a 190 puts you at 45 psi. You will be rich at everything under 2 psi boost on that same 2g. It could even work out to be in vacuum. For example, Idle vacuum of 20 in/HG equals -10psi (2"/hg is 1 psi), so at idle with the hose on fuel pressure should be 33 psi. Lets say the 190 gives you a pressure of 43 with the hose off, but 37 with the hose on. So at idle (20") you are 4 psi too high. So at vacuum greater than 18"/hg you will run rich.

I hope this makes sense. If you understand how the FPR is supposed to work and the difference between hose on and off, etc, it should make sense. Its a bit of a pain in the ass though, I know Maybe I can elaborate on this later if there is some interest in a more in depth explanation of how this system works...