Thread: How much compression?
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09-05-2010 05:12 AM #7
CHR Member
- Join Date
- Mar 2007
- Location
- Granbury
- Car Year, Make, Model: 68 Chop top
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- 147
I see that is Comp XR290HR cam, I am going to use the XR276HR cam. My bottom end is all stock. Comp recommends 9:1 compression with the 276 cam. With a 10cc dome I get 8.8 and 21cc dome I get 9.6 on the calculator.
What is your base timing, mechicancal, and total timing set at? How much vacuum do you have at idle?
You have been a big help, thanks!
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