TurboBandit

Hey all...
So i've been building my LS1 turbo setup in my '00 S10.

I have a single in tank walbro 255 pump, and 60# injectors.
Planning on running 8psi. 10psi IF Everything is going ok.
t70 turbo.


I've read mixed messages on needing to run a fuel pressure regulator or not. Some say you don't need it, some say you do... also makes tuning much more difficult, or no?

Next is the fuel pump... Does there need to be a dual pump setup? or will single pump suffice?



Lastly... Do you FI guys all ditch the MAF and go with a MAP sensor?

onfire

iTrader: (17)

Since you're doing a custom install...I'd put a Weldon FPR in it with a return line to the tank..really helps a single Walbro. 8-10psi max will be fine with a single Walbro and 60's. At that level of power you could easily keep the maf tune and tweek the PEvsRPM table and be fine. If you crank the boost up...everything, except the Weldon/return, changes.

TurboBandit

What would happen if you run without a 1:1 regulator? can you use the stock regulator at all? I used to tune honda's and suzuki motorcycles, and always used the stop pressure regulators with a MAP sensor.

allthrotle

iTrader: (2)

im running 7-8 lbs on my car with just a stock regulator and a 255lph pump and 60lb injectors. if you plan on sticking with that boost level you dont need any fancy regulator.

Avengeance

iTrader: (4)

IMO the only way to go with a boosted car is with a AFPR..... I wont ever run a boosted car without one.

It only cost me a couple hours of my time and a couple hundred bucks to add one to my procharged SS.... its nice to see the FP gauge move the other direction when I stab the throttle. The piece of mind is nice too.

Schantin

iTrader: (6)

It's not any harder to tune the car with an aftermarket fuel pressure regulator.

Ditching the MAF for SD is a personal opinion. I always did. I still run SD. The MAF will work fine if it's tuned properly (and not maxing out from the increased airflow). I like the control that 2-bar SD gives me and when I was FI the car made more power under the curve using 2-bar SD.

TurboBandit

NEW IDEA.... also, probably some dumb questions.

I'm running:

Corvette fuel rails and stock Fuel Pressure Regulator.
This has the feed and return line. not single.
I have the Walbro and 60#s.
Running MAF

Do i put the MAF on the inlet of the Turbo???????????????

And with a feed and return line, i'll always have a constant Fuel Pressure. No variable fuel pumps for me like u F body guys...

onfire

iTrader: (17)

Maf goes between the turbo and the tb. Vette rails with GM return/FPR is a nice set-up.

TurboBandit

So then how would the MAF read the extra air from boost?

black98ws6ta

iTrader: (77)

Because that air is passing from the turbo to the throttle body?

TurboBandit

From my fluid dynamics courses that i took in college, and all that other junk... If i have air at 14.7psi (atmospheric) and air at 14.7+8psi (in boost), the flow over the MAF is the same, just a different pressure... which the MAF can't read... It doesn't have a barometer in it, ya know?

The maf on the front of the turbo, however would read ALL air going into the turbo, before it's compressed. Where as a MAF between the TB and turbo would not read the extra boosted air...

Unless i'm an idiot and people have done it this way before.... Hope someone can correct me? or agree with me???

Lonnies Performance

iTrader: (16)

It is called a MASS air flow sensor because it can determine the air density & calculate the mass of air moving through it. It measures more than velocity & can compensate for the air density. It will work fine on the pressure side & offers less restriction there as well. All LS1 cars with chargers put them right before the throttle plates.

TurboBandit

You convinced me~


Pic as of 4 weeks ago:



Engine is in...