good info

thanks for the info it was a big help

Thank you very much,I needed that info to get me jump started...

turbo b16a
 

Thanks! this post helped alot. I got a couble newbish questions tho..could i run 8-10 psi with stock ecu and fuel injectors? if not what kind of injectors would be good? and could i keep the stock fuel pump or would I need to upgrade? im running a b16a vtec.

Hi Guys.
I am a vehicle customizer who is new to the Turbo scene. I did try the search engine looking for V8 turbo's but did not find an answer to my question.
I am Building a 55 Chevy Bel Air. The engine is a 93 LT1 which I have the complete harness and Computer. I am running a 5 speed with 3 : 73 Gears. I would like to build a twin turbo set up.
I have been trying to google questions but cannot really get a straight answer. The engine is stock with about 275 HP. I would like to be between 500-600.
I would like to purchase used turbos but im not sure which vehicles to look at. I saw the models listed on the first page of this thread but am concerned that they came from small 4 cylinder engines and may not be enough boost for my goals.
Any advice would be greatly appreciated.

You likely want a couple of T3 turbos from 2.3L Fords. They should spool up quickly and make the power you want since getting into the high 200hp range with those turbos is fairly easy; I don't think you'll have a problem hitting 500whp but 600whp might be a stretch.

Control is going to be important, so software like EFI Live or some other GM tuning software will be important. One place I wouldn't skimp is the intercooler. If you're going to pump the output from both turbos into an intercooler, pay the extra and get a quality unit from Specaro or PWR.

You can also look for smaller Holeset turbos, I am not familiar with all the model numbers but I think HX35 is maybe what you want as well.

Another link for cheap turbo parts and accessories

Turbo Kits, Turbo Manifolds, Import Performance Products, SSAutochrome Inc.

Looking for a turbo exhaust manifold for an LB4 (4.3) V6 any particular place to look? Junkyards no luck I'm looking at $700 plus at dealer... Is it even worth turbocharging my truck? -.-

a pair of T4 T60s would be a good size for twins. you got a V8, let that thing breathe!i got a 98 TA with an LS1 so i know. I got a T76 with .96 rear mounted going on with mine. the LT1 will be ok with a little smaller single if you want but if you want twins a pair of T60s is a bare minimum and an intercooler is a must. You stick too small of turbos on a V8 and your gonna casue two things.... your gonna limit upper RPM power becasue the turbo will be physically unable to push anymore air and 2 your gonna over heat the intake charge and get heat soak in your intercooler and cause earily detonation and kill your motor in the process. also dont go too small on the wastegate. 38mm are "ok" on rear mounts but front mounts need at a minumum a 46mm wastegate to control all that extra air. we bypass waymore air then a 4cyclinder. A tial 46mm wategate is a great start point.
We got 4 extra cyclinders then alot of these smaller engiens so cooling and fuel control is an absolute must! alot of this forum is orientated towards smaller motors so the turbos recommendations are smaller and internally gated. nothing wrong with that but we pump more air and fuel. Tuning is also a biggy.

heres alittle help to get an idea of what you might what to do for LT1/LS1 engines. I know its kinda like another whats what but its to assist another performance group that has a little more base power to start with ;)
Turbo FAQ - LS1TECH


also i dont know why my fuel system schematic is thumbnailed but whatever

Thanks for all this info, the links especially