twin turbo or single for lt1 350??

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Jun 19, 2005 | 09:28 PM

#11

Tom-Guy

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Joined: Feb 2003

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Re: twin turbo or single for lt1 350??

Twins vs single is really just a matter of packaging. 79 Trans Am should have enough underhood room it is irrelevant - do what you want.

As for turbo selection, since I'm ASSuming this is a bone stock LT1, I'm with hotsex on the pair of .42/.48 Saab units. All these guys recommending hybrids or GT turbos or straight T4's haven't the first clue - sorry, guys. Stock L98/LT1 had the rear bores #7/#8 incorrectly (under) clearanced, so when you hit at or over 400 whp the stock pistons expand due to heat, bind in the bores, and start busting things up real good. A single T3/T4 with .82 AR turbine and stage 5 wheel would exceed what the stock LT1 can take.

Jun 19, 2005 | 11:28 PM

#12

topspeed

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Joined: Nov 2004

Posts: 319

Re: twin turbo or single for lt1 350??

plus .42/.48 T3's are cheaper haha

Jun 20, 2005 | 02:02 AM

#13

45psi

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Joined: Feb 2003

Posts: 0

Re: twin turbo or single for lt1 350??

Quote:

Originally Posted by Erich

I think for twins, you do want the T3/T4 hybrids. You got an extra 50 ci on the mustangs. As far as twins or singles-maybe the grass is always greener but after making twins, it seemed that making a single would be easier (fitting the turbo in the engine bay, IC connections). But I would not have done it any other way. Two banks of cyl, gotta have twin turbos.
Erich

this guy made me laugh. i mean you can really tell he's an import guy trying to give domestice setup advice. lol

Jun 22, 2005 | 11:59 PM

#14

shmaptoe

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Joined: Feb 2004

Posts: 198

Re: twin turbo or single for lt1 350??

one of my friends is running a gt40 on his lt1. psi is low but its still sick. takes a second to get going though, but thats probably cause it's in a 5000+ lb caddy