Setting Initial Timing 350/350 GM style cam
Thread Starter
Burning Brakes
Joined: Feb 2009
Posts: 780
Likes: 1
From: Shelby NC
Setting Initial Timing 350/350 GM style cam
Have a 77 350 rebuild with 350/350 GM style cam hdry lifter. Anyone set one of these and knows what best initial timing might be for this cam? When I put the vac on the advance it pulls up to about 12 degrees at idle--take vac off and the initial went back to 0. I have moved the initial up to 5 degrees and then plug the vac back on and it goes to about 17 at idle.
Should the initial be any more than 5 degrees with vac disconnected?
Thanks for any help----
Should the initial be any more than 5 degrees with vac disconnected?
Thanks for any help----
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
I would guess your initial with the vacuum advance line disconnected and plugged would be around 12 or 14. Check the timing sticky at the top of the tech and performance page for help setting your advance curve.
Thread Starter
Burning Brakes
Joined: Feb 2009
Posts: 780
Likes: 1
From: Shelby NC
Thanks for the reply-should have paid attention to the above listed notes--good article there lots of good info!
