Originally Posted by mberndt
1.) I'm not basing any fuel requirements off of my NB AFR guage, it's just saying it's running rich, which is what I want...
2.) I'm not running some HUGE turbo, it's quite small actually a T28 at 5-6psi.
Dude, I respect that you've done it before, but obviously u care about SPEED and TRACK competition, whereas I don't.
answer me this question:
Will A small turbo w/ FMIC on a daily driver, with a simple FMU running a bit rich, stock fuel pump or high-flow if needed, hold up to the demands?? So far it has run perfectly, no probs whatsoever.
First off how do you KNOW that your running rich? Your method of measuring your afr is about as accurate as sticking your head up your tailpipe. your gauge tells you shit for information.It's your motor so go ahead an rely on it to tell you what you want to hear/see.
secondly, what does the turbo size have to do with anything? If your lean your lean regardless if your running a 14b turbo or a t4 turbo, either way your gauge won't tell you any different.
Thirdly, I care more about reliablity then anything else. What good if 400whp if it only lasts half way down the track. Reliablilty is number one period. It's no different then the average joe running his car on the street, what good is a turbocharged engine if it's sitting in your garage parked because you blew the motor? Everything comes back to reliablity period.
To answer your question, yes you should have a high flow fuel pump if your running a fmu. The stock pump with stock injectors and a 12:1 fmu is only good for about 4psi before it starts to lean out. It's gets dangerously lean above 4psi. And yes I tested that to get my info, it's not just some number I pulled out of my ass. I'm not one to spread usless info in an effort to sound smarter then I am.
We mention tuning because you "think" you know the condition of your tuning when you really don't. If you don't want to fork over the cash for a wideband 02, do yourself a favor and get your car on a dyno with a wideband 02, throw in a fuel pump and adjust the afr with the afc.
Every car is different, you cant base your situation on your brothers car it's a completely different car.
i'll say it again, when I had a lightshow (aka air/fuel ratio gauge) in my car, it would read lean when I knew for a fact that I wasn't. it would start stoich and about 5psi would peg in the lean area all the way to redline. It's funny bacause the wideband 02 that we were tuning my car with showed an air/fuel ratio of about 12:1.....I'm telling you they are worthless.