I have a have been. oing back and forth with trying to figure out this setup
People tell me you cant use a efi fuel regulator with the walbro pumps
And I hear go with a small turbo with a big motor then I see people with stock 6.0's with 70mm turbos . I have a

85 el comino
Stock L92 and heads
Gm single plane w/ elbow
Ls9 cam
Built th350 maybe a 2800 or 3000 stall
Grand national rear w/ 342 or 373s

Help

 

What do you intend to do with it when its done?

 

Oh its going to be a street car take in to the track every blue moon

 

basically what you need is a horsepower goal, everything else can be figured out from there

 

And is it going to be on pump gas or e85?

 

Pump gas
Hp goal 500+

 

Id say a gt45 turbo, 80lb injectors, and the stock tb will get you the with ease and have some room to turn it up some not if but when you get bored with it.

 

Oh and a aeromotive brfpr will do the trick too.

 

How much boost should I run ?
Ls1 stock tb ?
What size gears?

 

10-12lbs should get it done. Seeing as the l92 is dbw you will probably have yo use the stock truck tb or ls2/3. And if it were me id run 3.00-3.25 gears.

 

stock truck intake, stock return rails, stock regulator built in, stock throttle, stock heads, gaskets, cam, etc etc will easily do 500+ with a gt45 turbo.

we did 500whp on a totally stock 4.8 and a gt45, valvesprings floating away!

i would recommend some cheap pac 1218 springs and hammer it with boost

 

hey not to jump in and steal the thread but what do you all think a 76mm on3 turbo ballbearing would do with a setup like that on a ls1 fbody motor

 

i would say anything in the 4.8-7.0l range with a 68-88mm turbo is good with me in any vehicle

 

I'd say, it kicks ***..

<-I run one, rear mount, I need a bigger wastegate, and a stronger transmission. Stock 4L60e ain't cuttin it.

 

Im not running dbw or the intake i have a gm single plane

 

With the elbow check my setup at the top

 

Are you going to open the gap on the rings before you put it all together?

 

Stock stock stock

 

I'd say buy my tc76mm turbo . Will spool fast and make up to 800hp.