New crate 350, backfires...stumbles...

[clif1968]

Originally Posted by 67ChevyRedneck

Thanks! I put a new edelbrock on a crate motor two years ago and made sure I hooked the vac adv. to the port that has no vac at idle, and left it hooked when I timed it to 8 degrees BTDC. I thought 8 was the max your supposed to go on a stock motor, but I might bump it up to 10 to see what it does! It runs great now, maybe I'll be able to free up some horsies!

Just make sure that it don't ping under load. If you have to much advance it will ping usually in third gear at slower speeds with light acceleration. That's a sure way to blow a hole in a piston, or blow out a head gasket. I normally time engines by ear, advance a little at a time until I hear it ping then back it down a little. This is usually were I find the "sweet" spot in any motor.