matts85vet

installed a fluidampr today with new pointer. with the timing marks on the damper i can now see that my spark advance with wire connected is about 45* as i revved the motor. is this too much?

ive heard sbc's like a total of 36-38* total advance

whats the best setting?

thanks in advance

matt

BadSS

You have to find true top dead center with a degree wheel and set the tab to zero before you know for sure what the timing is. If we're talking pump gas and the engine likes 45-degrees, meaning it's not pinging and it's where the engine runs the best ET,, chances are the timing tab is off.

MR NICE

On a carb car the vacumm advance adds timing at part throttle, numbers in the 50's are normal,when you go to WOT the vac. advance is no longer in use, then it's mech and base timing.. I have no clue about the computer timing at part throttle.

mseven

the best setting is to set it to 6* w/est disconnected and when reconnected allowing the ecm's timing table to do it's job . At certain rpm's v.s. load (not @WOT) the timing table will have as much as 45*.

383vett

You're correct about the vacuum and mechanical advance distributor. The same holds true for computer timing. With little or no load, the timing will easily reach 45 or 50 degrees. It is at wide open throttle at full load that timing will be at around 34 degrees or so.