After posting this thread, I've decided to proceed with the turbo LT1. I'm thinking of flipping the stock LT1 manifolds, rather than purchasing/fabricating manifolds. Here's an example of what I'm speaking of:





The setup will be a 383" @ 8.5-9.0 CR (all forged internals), splayed 4 bolt mains, ported stock heads & intake, cam (undecided)... this will run through a new WC T-5 and a rebuilt BW 9 Bolt. I'd like to see 500 rwhp on between 7-10 lbs of boost. Yes, I realize that the weakpoint is the trans, but it's free. I want the turbo to start spooling (making power) around 2250-2500 RPM... So, I was tossing around a 68-72mm turbo (probably a precision). I don't care so much about "big numbers" or top-end horsepower, but overall fun/driveability.

So what are your thoughts on the cast iron manfolds... and what's the consensus on the turbo size..

thanks in advance!

 

nice set up thats alot like what im thinking of doing.

 

Let me know if u find out some other nice routes, Im mocking a turbo setup in my LT1 Iroc next weekend, Im gonna try both block huggers flipped and S10 conversion headers swapped (i have seen this done)

Jay

 

what mpg you get with this setup? I want build MPG lt1 turbo, i heard using some turbos you can get better mpg than stock engine have.

 

Its really not going to be much fun with gearbox and rearend full of metal soup.

Especially saying you want to aim for a bottom end power setup, when thats going to be the biggest thing melting the drivetrain, if you at least did something that comes on up top you'll have a better chance of it lasting a little longer.

 

I want use th400 gearbox with 2.73 posi, then its get good mpg in highway too ca 2100rpm 90-110km/h
What choice of turbos will get better mpg than stock lt1 mpg?

 

if i live USA i drive DD 454 or something like that, gas is cheap in USA.
In our country lowest octane is 95 and it costs 1.36euros per liter and 98 1,39-1,40 euros
I dont understand why USA people blame for high gas prices and drives with prius or something.