Eclipse GSX Turbo Upgrade HELP

[TheRomer]

I would go with the evo3 16g, and nothing else for what you want. This setup is easy to tune, easy to learn with, and is proven to make over 400 hp. I know someone that has gone sub 10 sec 1/4 on a 16g. So the power is good enough for you.

Also, if you get all the supporting mods, then you will with a good tune do no damager to your car (99% of the time if you arn't a tool bag). These including your fuel pump, injectors, exhaust, and upgraded intercooler (not neccasary, but certainly wanted). You will also need a type of tuning, logging software. The best choice being DSMlink by far. Yes it is expensive, but it is a $550 well spent. You can tune, and log at the same time. This is what will save your engine and your car. If you go this route, I suggest getting nothing lower then 950 cc injectors, since DSMlink can handle those just like stock injectors, so you wont even notice a difference until you let that turbo spool. Also, just get the 255 fuel pump while your at it. You will not need a FPR (fuel pressure regulator) with this setup, only if you flow more air with a bigger turbo you will need one.

With this in mind, adding an exhuast, an intake, and making sure you have no boost leaks with a boost leak tester (check out VFAQ on how to build/use one), this setup will make for a killer street Daily Driver, that can be reliable if done right. I hope this helped, and that i didn't miss anything.

[Thor06]

I beg to differ on the 255 deal. Kevin has done some pretty extensive writing on that in this forum as I remember and yes, you will need an aftermarket FPR. The reason for this is has nothing to do with the air flow, if I remember Kevin's posts right its not because of WOT flow problems (at WOT the stocker is sufficient) but its idle that is the problem. The inside diameter of the fuel passage just cant get rid of the extra fuel quick enough at idle. I'll try to dig it up if I can but I wouldnt chance it.

Oh yeah, welcome to the forums TheRover.

[Black99GST]

for kevins post! the only reason i bothered with the FPR with my 255 was because if kevins post! you NEED it for that much fuel

[TheRomer]

Well I beg to differ on that, becasue I run an evo3 16g with 880 injectors, and a rewired 255 pump with a stock FPR, and my car idles and drives like a dream . Yes, it would obviously be better, but if you don't have the money, you do not NEED one. I don't plan on putting one on my car at all. This again is for the money-needed people.

Edit- Of course, getting a FPR is MUCH MUCH better, but if you cant get it, then you don't need it. They do help though obviously with Kevins loggings and findings.


Thanks for the Welcome Thor, but I used to be !$GSX!$ or something like that, but that name was to ricey and pointless. It is now TheRomer, not TheRover . Rememeber me?

[spyderturbo007]

If you want the car to run properly, you need a FPR with a 255lph pump.

I hope Kevin (kjewer1) doesn't mind, but I'm going to paste a reply of his to the same discussion over at dsmtuners.com.

Originally Posted by kjewer1

The stock FPR will also bollix fuel pressure in a very predictable and repeatable fashion, but it will not be a linear change. That's what makes it tough to tune around, though it can be done. I'm a big fan of giving the ECU what it expects, and that's 43 psi across the injector at all times.

To provide a quick illustration of what is going on, simply check your base pressure and compare it to expected base pressure. For example, if the stock reg and 255 is giving you a base pressure of 50 psi, that is 7 psi over what the regulator is trying to achieve. At everything up to 7 psi of boost, fuel pressure will remain at 50 psi. Once you get to 8 psi, it will start to rise 1:1. So everything from 7 psi and under is banjaxed, and anything over 7 psi is normal. You can see the non-linear relationship as boost pressure rises. At 2 psi you are 5 psi too high, and at 6 psi boost you are only 1 psi too high. At 20" of vacuum, fuel pressure is 17 psi too high. And that makes it pretty obvious why this is a much bigger problem at idle/cruise.