High Compression 390

MOPAROFFICIAL said

You can only run so much dynamic/cylinder pressure on 91octane before you have issues. Closing earlier than [email protected] will put you on the edge ... and you dont seem a very capable tuner if you're here asking US for cam advice, bub, so I'd really think hard and try to understand what and why is being said.

I wouldn't use less than 278 duration or I'd drop the compression down for a smaller cam.
Are you building around a compression ratio?
Are you handcuffed to it?

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Wow, thanks... I guess I am asking for opinions from people that might have more experience in this than I do. Not sure what a forum is for if not that. After I do this I will be glad share my experience with people. But at this point I have never built a 390 stroker 11:1 motor.

For the CR, there are not a lot of choices out there for pistons. So right off the bat I was thinking that 11:1 was too high for what I was building. But it is right on the cusp of ok at 7000 ft of elevation with AL Heads. I can build a 9.6 CR motor with cast iron heads and call it good, but wasn't sure I was selling the motor short at that point.