Timming Question

[sprtsjunky32]

I have a 1999 vortec motor that i put in my vette it has a 500 lift cam in it iam running a 670cfm holley street avenger on it i was wondering if someone could tell me what i should set my timming at it is a 350 5.7 liter


Thanks sprtsjunky32

 

[JohnZ]

Don't know what type of distributor you have, but a good starting point is 10*-14* initial timing and 20*-22* of centrifugal advance in the distributor, all in by 2500-2800 rpm, with a vacuum advance can connected to full manifold vacuum that adds 15* with at least 2" Hg. less vacuum than you show at idle.