General Category > Quadrajet Carb Talk and Tips

350 having detonation problems.

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tayto:
good news! so if i am understanding right it sounds like you have 29* TOTAL timing. You will probably be want initial timing around 8-12* and then keep your TOTAL timing around 28-30. I don't know if you read my post earlier but grade of fuel are you running?

Cliff Ruggles:
With high compression and small cam there is nothing wrong with a low initial timing number. 

I ran my high compression 400 SBC with tiny cam at 4 BTDC and put nearly 200,000 miles on it w/o issues anyplace.

Years later I built a 1967 327 with high compression and small cam and it didn't want much timing either, but had a smooth idle and great power, plus managed pump gas just fine.

In any and all cases with these things give the engine the timing it wants even if you end up a little below the "norm".  We've learned over the years that things done to improve combustion efficiency have the engine wanting LESS timing at every RPM, not more......Cliff

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