400sb,750v.s.holley,cam Installed Straight Up,timing Correct.
Ive Dejetted Carb From 74's To 68's Thinking It Was Running Too Rich, The Header Glow Is Less, But Still Present. Any Help?? Ty.
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400sb,750v.s.holley,cam Installed Straight Up,timing Correct.
Ive Dejetted Carb From 74's To 68's Thinking It Was Running Too Rich, The Header Glow Is Less, But Still Present. Any Help?? Ty.
Is it a new motor? Or has the distibutor been out? In the past when I have seen glowing headers the timing has been way late or retarded and the fuel was still burning as it left the cylinders. This can happen if you are a cylinder off on the distributor rotation. Instead of being advanced on #1 like you think, it is actually way retarded on #2. I sure hope that makes sense, I don't know how else to describe it. Double check to make sure your rotor is pointing to the #1 wire on the cap when the motor is at TDC.
Pat
I had a similar problem on a small block 350. The headers would glow bright red. My valves were adjusted too tight. My neighbor who used to work for GM asked how I adjusted them and I told him a half of a turn after the pushrod would no longer spin in my fingers. He said just go a quater turn. I went home and adjusted his way and the cherry red headers went away.
Wrong way on the jetting, lean makes it worse. You need enough unburnt fuel remaining to quench the fire, or it'll still be burning when the valve opens. More advance would be my solution, first.