SBC base timing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Nordic · 03-20-2014, 01:19 PM

What do you run for base timing in a non stock 350?
The new motor is .30 over 10:1 pistons 650 cfm holley and a mild cam(
valve lift Int .420 exh .443
cam lift Int .280 Exh .295
duration 278 288\
hyd lifters (not roller) )

Some people say to advance timing until I pings and then back off 2 degrees, others say to use a vacuum gauge. I just don't want to run to advanced.
starts and runs well at 14 degrees .not enough? to much? points dist with working vacuum advance.
opinions?

03-20-2014, 01:19 PM	#1
Nordic Registered User Join Date: Jun 2011 Location: Unionville CT Posts: 168	SBC base timing What do you run for base timing in a non stock 350? The new motor is .30 over 10:1 pistons 650 cfm holley and a mild cam( valve lift Int .420 exh .443 cam lift Int .280 Exh .295 duration 278 288\ hyd lifters (not roller) ) Some people say to advance timing until I pings and then back off 2 degrees, others say to use a vacuum gauge. I just don't want to run to advanced. starts and runs well at 14 degrees .not enough? to much? points dist with working vacuum advance. opinions?



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