Boost on 11.6:1 C/R
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Boost on 11.6:1 C/R
alright i have a slightly stupid question. I have recently been bitten by the turbo bug. i HAVE to have a turbo but i really dont want to swap out my pistons.
How much boost could i get by running on my forged 408 with a high C/R??? any ideas?
How much boost could i get by running on my forged 408 with a high C/R??? any ideas?
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You could probably run more than 5psi, but you would have to run race fuel with it all the time and no timing I would guess.Not sure though,but you can just buy a set of head's with bigger chamber's and run some thick head gasket's also to help lower the compression.IMOA
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If it was my setup i would run 10lbs of boost and the race gas and play with the timing,but I would not go over 10lbs.What is the stock compression like 10.5 or close to it,so it is not that far off of stock.That is what I would do if it was my car but I like the extreme of thing's anyway.
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How much boost at what octane will be an exercise of trial and error. You obviously will be much more limited, you will extract more power for a given air flow vs a low compression engine. If I had to guess, I would say 10psi on 118 with 15* or so of timing will net you very respectable results. Meth/water injection will help stabilize the mixture if you are picking up knock.
Be vewy vewy cafull and take it slow.
Be vewy vewy cafull and take it slow.
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I was making 5-6psi on 11.6:1 on (mostly) 91 octane pump gas for a while before I got new heads. I just pulled the timing back a little and ran a little race gas for extra insurance. It ran great and pulled hard, and it was on the stock bottom end too with a 222/224 cam on a 114 LSA.
I'd buy some larger chambered heads to lower compression before I swapped pistons, seems like a lot less work...
Rob (Bad30th)
I'd buy some larger chambered heads to lower compression before I swapped pistons, seems like a lot less work...
Rob (Bad30th)
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man i sware i just locked one of these
your gonna have to tune and see, there is no set psi to CR to many varilbes
https://ls1tech.com/forums/forced-induction/208864-turbo-faq.html
your gonna have to tune and see, there is no set psi to CR to many varilbes
https://ls1tech.com/forums/forced-induction/208864-turbo-faq.html