HOW TO GET MORE TOTAL TIMING?
Thread Starter
Racer
Joined: Oct 2001
Posts: 412
Likes: 0
From: Monroe North Carolina
HOW TO GET MORE TOTAL TIMING?
I cant get more than 38 degrees with vac. connected at a very high rpm around 4000 rpm. What do i need to do to get more advance? when i connect the vac there is no change in advance either? What is wrong???
Safety Car
Joined: Aug 2000
Posts: 3,909
Likes: 26
From: Clymer PA
Re: HOW TO GET MORE TOTAL TIMING? (Corvettelvr73)
To get your total timing advance you want to remove your vacuum advance while checking your timing. With the vacuum advance removed you want to tach the motor to 3000RPMs. While pointing the timing light at the balancer turn your distributor counter-clockwise (advancing it). Do this until you get your desired reading (if you are running a small block you should shoot for 34-36 degrees total). Now tach the motor up to 3500RPMs to insure that you aren't getting any more advance. Clamp down your distributor and you are done. This should all be done with the vacuum advance line removed.
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Re: HOW TO GET MORE TOTAL TIMING? (Corvettelvr73)
If you're not getting any vacuum advance much above idle rpm, the canister is probably bad. Unless you already know that your distributor has been curved to provide total mechanical advance at a lower rpm, be sure to rev the engine up to about 5,000 rpm to make sure that it's all in. Unless you know that it's through advancing, any readings you get will be meaningless. I'd start with 36º total with vacuum disconnected and go from there. With a 16º vacuum can, you should then have 52º total with vacuum connected and working.
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: HOW TO GET MORE TOTAL TIMING? (Mike Ward)
Why would you want more than 38 degrees? Small blocks like 34-36 best.
