I forgot to share something....I have had for the longest time a "miss" of sorts in my stock HEI and as recently in my new Accel-brand distributor. It caused my timing light to read inconsistently, and I could "sense" the miss there no matter what I replaced in the engine.
Well, I read an interesting article about timing downloaded from the Chevyhiperformance.com web site, and in one of their insets they mentioned how HEI have always been plagued with a "miss" attributed to the rotor spark sometimes jumping to ground through the rotor hold-down screws. They mention how the solution was found by Performance Distributors -makers of Davis Unified Ignition (DUI). They use nylon screws to hold the rotor down. I recently ordered some screws from them ($0.50 each), and I installed them in my car's distributor rotor. When I fired the engine it was like day and night! The miss was gone, the timing light has not lapses, and the car gained more seat of the pants torque. I have yet to test it at the track to see if I gained anything, but the smoothness alone is well worth it. Some of you may want to give this a try.
Well, I read an interesting article about timing downloaded from the Chevyhiperformance.com web site, and in one of their insets they mentioned how HEI have always been plagued with a "miss" attributed to the rotor spark sometimes jumping to ground through the rotor hold-down screws. They mention how the solution was found by Performance Distributors -makers of Davis Unified Ignition (DUI). They use nylon screws to hold the rotor down. I recently ordered some screws from them ($0.50 each), and I installed them in my car's distributor rotor. When I fired the engine it was like day and night! The miss was gone, the timing light has not lapses, and the car gained more seat of the pants torque. I have yet to test it at the track to see if I gained anything, but the smoothness alone is well worth it. Some of you may want to give this a try.
