lt1 ready for boost?
Thread Starter
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Joined: Jun 2011
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lt1 ready for boost? got a 383 stroker lt1. eagle rotating assembly with forger crank, rods, and pistons. rods are h beams and mahle iverted dome -16.00 cc. port and polished heads. now for the question, what kind of psi would this setup hold? any one buid something close to this? i will be running a gt-45 with a air to water intercooler.
TECH Apprentice
Joined: May 2010
Posts: 333
Likes: 1
From: Arkansas
Do you know your cr? in the end it's all in the tune. I would say a stock motor with the best tune might be better than a all forged motor that's lean and has to much timing. Whatever you do you'll enjoy it it's a whole nother game...
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got a 383 stroker lt1. eagle rotating assembly with forger crank, rods, and pistons. rods are h beams and mahle iverted dome -16.00 cc. port and polished heads. now for the question, what kind of psi would this setup hold? any one buid something close to this? i will be running a gt-45 with a air to water intercooler.
What are the flow numbers of the heads? What are the intake port sizes? What are the cam specs?
These are all things that we need to know to provide a more accurate guess.
I make 648 RWHP @ 6500 RPM (15 psi) on a Procharger F1.
Theoretically, a motor built a lot like mine would be able to make 600+ at 13-15 psi.
Need more numbers.
Thread Starter
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Joined: Jun 2011
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im not sure of the cc on the heads. all i know is they are port and polished. they were on it when i got the car. cam is a comp .503 intake .510 exhaust. i think im gonna need a custom grind cam for the turbo. heads have never been on a flow bench.
Staging Lane
Joined: Jul 2006
Posts: 92
Likes: 1
From: Chattanooga, TN.
My last build was a 383 with 16 cc dish pistons, but with 53.6 cc combustion chambers, my CR was still around 10.6-10.7:1 so I only ran about 6 lbs of boost. I ran a water/methanol injection system with no intercooler and had it tuned and it did pretty well, all things considered. With a 224/236 573/571 116 lsa cam and just mildly cleaned up heads, it made 467 rwhp/ 470 rwtq.
Not to hijack, but I have a question or 2: isn't a dish the same as inverted dome? Why call it -16cc if it's really adding 16cc? At +16cc, your still above 10:1 cr assuming 54cc chambers.
yeah my motor is being built with 31cc dishes and 61cc chambers to get to 8.8:1 but I plan on running 18-20psi. yours sounds like it will most likely be a wee high for serious boost, but you can still probably get away with a low boost set up
As long as the tune is done correctly used discipline. LT1 owners by the **** ton have put spray on their car, got greedy and have blown ring lands out the exhaust only to land upon the windshield of some unsuspecting vehicle sending it careening off the road in a fiery ball-o-death.
My last build was a 383 with 16 cc dish pistons, but with 53.6 cc combustion chambers, my CR was still around 10.6-10.7:1 so I only ran about 6 lbs of boost. I ran a water/methanol injection system with no intercooler and had it tuned and it did pretty well, all things considered. With a 224/236 573/571 116 lsa cam and just mildly cleaned up heads, it made 467 rwhp/ 470 rwtq.
