Hi,
New to the forum.
Hope to receive some help on some items.
I am restoring a 1951 Buick Special Model 48
After assembling the straight 8 and running it, I had a backfire thru the carb at 1800 RPM.
So I rechecked my timing chain marks and found I was one tooth off. Corrected that, reassembled, and now no backfire at 1800, but now backfire starts in at 3000 RPM.
I have checked initial timing, mechanical advance, vacuum advance. All are within specs. Tried 2 different carburetors because the backfire seems to go away when you close the choke plate about 3/4 of the way.
Both carbs no difference.
I have checked valve lash several times.
Tried another distributor with no difference.
Do you think I have a wrong or defective new re-ground cam?
Any suggestions would be much appreciated.
Pulling my hair out, and at 63, there is not much left.
Thank You
Tiltbilt
New to the forum.
Hope to receive some help on some items.
I am restoring a 1951 Buick Special Model 48
After assembling the straight 8 and running it, I had a backfire thru the carb at 1800 RPM.
So I rechecked my timing chain marks and found I was one tooth off. Corrected that, reassembled, and now no backfire at 1800, but now backfire starts in at 3000 RPM.
I have checked initial timing, mechanical advance, vacuum advance. All are within specs. Tried 2 different carburetors because the backfire seems to go away when you close the choke plate about 3/4 of the way.
Both carbs no difference.
I have checked valve lash several times.
Tried another distributor with no difference.
Do you think I have a wrong or defective new re-ground cam?
Any suggestions would be much appreciated.
Pulling my hair out, and at 63, there is not much left.
Thank You
Tiltbilt