Originally Posted by
swrracing99
I have had this problem for the last 3 times I have built my motor. I have been running E-85 just wondering if anyone else has had this problem. The crazy this is it burnt the back 2 cylinders on each side really bad. I have been told timing issue, lean, too rich or vacuum leak. I do know that I am tired of building motors only to burn pistons. The last 3 motors have only lasted not even 2 races. Any suggestions would be appreciated. QFT 500 2bbl, vortec heads, 34 deg timing, 92 jets, 7 1/2 lbs of fuel pressure, holley aftermarket pump.