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Poll: What's your favorite target compression ratio for boost or N.A.?

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Old 12-28-2017, 09:08 AM
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Default Poll: What's your favorite target compression ratio for boost or N.A.?

I asked this question on the Gen. 3 forum as well, but here the chamber options are a little wider. 60cc, 65cc, 70cc all being pretty common.

The question is: If you could pick one ratio for boost and another for N.A. (plus a light hit of spray maybe) on your street/strip vehicle, what would it be? 9.0, 9.5, 11, 11.5?
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Old 12-28-2017, 10:56 AM
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60cc or 65cc for N.A. all depending on pistons used with around 11.5, I'd be will to go higher if a larger cam is used. Or 11.0 with a smaller cam to keep down cylinder pressure.

For F.I. 70cc it's open as it's boost dependant if less boost more compression 9.0 to 9.5 with a little meth and cooler to keep from detonation. Factory GM cars with FI such as Edelbrock S/C come in with factory 11.0 compression yet less boost.
Old 12-28-2017, 03:52 PM
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Thats kind of a loaded question.

11.2:1 N/A, 9.4:1 with roots/screw, 9.6:1 with turbo or centri.
Old 12-29-2017, 04:57 AM
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how big is the cam? How big is the motor? What heads? What fuel will be used? Etc etc etc. Come on man...
Old 12-29-2017, 05:29 PM
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For a street/strip, daily driven, NA, 6.2L LS3.......I would want something with a bit more compression than stock......something around 11:1 to 11.3:1 would be my goal.

KW

Last edited by KW Baraka; 12-29-2017 at 05:35 PM.



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