Solutions for too much compression

Valiant360420 said

Results are in...

Plugged the vacuum advance.

Total at 3000 is 34
At 2000 is 28
At 1500 is 20
Idle at 800 rpm is 10 degrees

Pinging it’s head off under power, even at 2000 rpm. Power feels pretty good until I have to let off because of the pinging.
I’m using a regular timing light, not a dial back.
I did recheck my timing mark today.

Question...

If I go buy a jug of high octane race gas, and then try to run more advance, and it doesn’t ping. What would that verify?

Click to expand...

That it's not lean like some ex'spurts claim.
If it was lean... it would surge at cruise, not necessarily ping at all. I swear ...some people read a bunch of **** and think they mastered the universe. Lean tune... if it's that lean, you're already breaking ****.
34 or whatever is too much total timing/power timing for the octane and your dynamic.
Bring it down to 25... then drive it and increase it 2 degrees at a time till it pings again....then take 2 out. That's what your motor likes on the gas you use.

Remember what I said to you in my first response, 25 is all I can run and I have a hair more than you ...so if you're pinging at 28, lower it to 25... if you're still pinging go to 23.

It's not that your carb may not need tuning, it's just well known you cant run that much with that amount of cyl psi.