Adam123

iTrader: (1)

I have my block at machine shop now. Checking bore installing cam bearings, o-ringing block and balancing and blue printing rotating assembly.
Rotating assembly: factory crank, h-beam connecting rods and JE forged dished pistons.
Just got my 317 heads in. Going to order cam and springs in a couple of weeks update with part numbers later, probably have atleast a 114 l/s on cam. Looking for valves. I don't plan on putting larger valves on heads.

The engine is an 00 lq4, came with wiring harness and pullies/accessories. etc.
In need of ecm and debating on transmission since motor has the longer crank
I have 4 700r4 at the shop.

Wondering how much boost a stock intake can handle

probably use a .68 a/r and a 76mm .96 a/r turbos. I want boost in lower rpms.

This project will take a while, I've been reading all forums and learning alot from members here. I'll take all the advice members are willing to give. I'll have pictures of the build eventually. I work offshore so I'm not there to work on it often. This is going into a 78 trans am. My dad and brother are engine builders but aren't familiar with the ls engines and the local machine shop that is doing the block work for me has built only one ls motor.

I don't get to check on here to often so my responses may be delayed.
Thanks to everyone's advice!!

skinnies

iTrader: (33)

I ran the times in my sig on the stock intake and have seen 20+ lbs on them when doing some testing on the street.

Adam123

iTrader: (1)

Well I'm going to keep intake stock then, talked to machine shop 2day, pistons are on back order. Looking for some descent exhaust valves now.
Ordering Comp cams extreme xe 273 camshaft in a couple of weeks or a week b4 I go home. It has a 114 l/s so I think that it will do fine with turbo. 2000-7000 rpm range.
i broke my darn oil pressure switch so I'm ordering that as well.
When I start the turbo set up I was wondering what to do with the O2 sensors, the motor came with 4, I know I don't need all 4 but how many do I use and do I merge the wires so the puter reads from all 4. ?

Mike@Diablosport

iTrader: (2)

You want to keep both front O2 sensors assuming any street driving.
You can eliminate the rear O2s through tuning.

Adam123

iTrader: (1)

Thanks, how far away from the manifolds should they be mounted?

xshawnjones

thats sick man. kinda what i wanna do with my next build!

Adam123

iTrader: (1)

Yeah I seen on another forum where a guy in fl. did the same with some import and the thing was wicked fast. He had boost from around 1600 to 7000 rpms. He hand made all the hot and cold side tubing. And I think the new 250s have a compound turbo on the engine from factory.
I have a 79 t/a so I should have plenty of room under the hood to plump the things in.