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Author Topic:   HEI TIMING
stealth
Member
posted April 28, 2003 10:22 PM
I HAVE 355 MOTOR AND HAVE NOTICED THAT WEHN SETTING TIMING AS I REV THE MOTOR THE TIMING LIGHT BECOMES ALMOST STEADY LIGHT UP TO ABOUT 3000-3500 RPM THEN IT STARTS TO ACT MORE LIKE A STROBE LIGHT AGAIN. TIMING LIGHT IS BRAND NEW. I WAS JUST WONDERING IF THIS IS NORMAL OR IF I MIGHT HAVE A POSSIBLE HIGH RPM IGNITION PROBLEM. I HAVE REPLACED THE DISTRIBUTOR AND STILL SEEM TO SEE THE SAME THING. THANKS FOR THE COMMENTS


SLEEPY GOMEZ
Member
posted April 28, 2003 10:43 PM
It sounds like your timing chain has a lot of slack in it. The cam load can develop a harmonic wave at certain rpms. This rpm can vary with cam design, valve train (springs) pressures and timing chains.

This can also happen with a distributor that has too light of springs on the centrifigul weights. This can cause the weights to flutter thus affecting timing. SLEEPY

flywheel
Member
posted April 29, 2003 09:55 AM
I HAVE TRIED HOOKING POWER CABLES TO ALL DIFFERENT POSSIBILITIES. THE MARK DOESNT MOVE AND THE LIGHT DOESNT SHUT OFF, IT JUST GOES FROM BEING AN ALMOST STEADY BEAM OF LIGHT TO MORE OF A STROBE LIKE IT DOES AT ABOUT 1000 RPM.


#28
Member
posted April 30, 2003 10:58 AM
Plug wire may be breaking down.


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