the car-69camaro six speed 3.70 rear.
engine-496bbc aluminum heads, 10.1 compression, efi, twin t70s with .96 a/r with log style headers and 50mm wastegates, intercooled, solid roller 652 lift 308 advertized 264 @.050 single pattern.

i have read several threads about compression and still have no answer some say you need 8.0:1 others say you can go 11:1 no problem. this car is 80% street driven 20% track. my goal is 1000rwhp on RACE GAS. i dont care how much power it has with pump gas, it already has too much for the street without turbos. i am going to run 6-8 psi on pump gas which is as low as i can go with my wastegates. my question is can i run this with pump gas or is it too much compression. i can put thicker gaskets to lower it. changing pistons is out of the question since it is already balanced with all forged internals already. but since this is primarily a street car do i want to keep it at 10:1 for economy and power under boost?

 

If your going to run it on real octane it will be fine. I don't think you will get in trouble with 8psi on pump. That is a large bore though and I don't have a lot of experience with that engine. On a small bore 4v I wouldn't be afraid of running 15psi on pump, but like I said I don't know how your engine works in a dynamic state.

 

Your making it more difficult then it is.

 

any definite answers

 

on race gas no. race gas and 11 is fine.

 

10 to 1 is fine with 10 Lb.. Again GOOD tune and you'll be fine..
Cooler plugs etc..

 

good cus i decided to run 6psi only, till i get some race gas and meth

 

its all in your tune man run aggressive it will detonate

 

I agree it makes a great car, especially for a daily driver it will still have tons of torque without boost. Just make sure it's tuned right and that you have a good intercooler.

 

according to the new owner of my old cobra. i ran 11.5/1 on 8psi with pumpgas no intercooler. i was allways putting in a few gallons of insurance race gas though. maybe why it lived while i had it. if you run a mix id say you would be fine. i would not take chances on running strait pump on anything forced induction, but thats just me. pay a few dollars on filling it up, or hundreds on rebuilding it. depends on if your going to a local cruise in or hitting the power tour long haul i guess.

 

What does it have for cranking compression hot?

 

I run 10:1 I've always run 10:1 and that's on pump gas 91 Cali which is like the worst of all the gasolines. I have a great intercooler and you can run up to 12 psi on normal gas. Anything more you need race gas... If you want higher boost.

 

not sure, it doesnt run right now. how much is too much?