Rebuilt 350 - detonation --> Cam swap?

[Greasey Harley]

THREAD RESURECTION:
I got tired of the mediocre power of this motor with 28* total timing. I decided to tear it down and do an exploratory surgery.
This is what I found.
SPOILER ALERT, some of my previous calculations were off.
Actual numbers:
Pistons---------------8cc, Flat top with 4 valve reliefs, Measured with a syringe
Head-----------------65cc, Advertised, also measured with a syringe
Piston to deck------.020, Measured with a Mitotoyo caliper
Gasket thickness---.041, advertised
Bore:----------------4.06", bored.060 over
Stroke:--------------3.48, stock

My new calculations:
This yields a compression ratio of 9.68 with a quench of .061 and intake duration @ .050 is 204
I think I have solved my detonation mystery.

-Russ



Summit racing compression calculator
https://www.summitracing.com/newsand...ion-calculator