Streetspark/DC ignition?
Below is from Phil Jacobs, PhD, Performance Ign Systems. He also made & sold computer systems, so he knows a thing or two.....
Out of the OEM ign systems, he rates GM HEI #1 followed by Ford, then CVhrys.
He is NOT going to give HEI that rating if it quits at 4500 rpm. There could be many reasons an engine stops pulling at 4500, mech & electric. Electrically, it could be low voltage supply, high resistance leads etc, no name a few.
Below is from Phil Jacobs, PhD, Performance Ign Systems. He also made & sold computer systems, so he knows a thing or two.....
Out of the OEM ign systems, he rates GM HEI #1 followed by Ford, then CVhrys.
He is NOT going to give HEI that rating if it quits at 4500 rpm. There could be many reasons an engine stops pulling at 4500, mech & electric. Electrically, it could be low voltage supply, high resistance leads etc, no name a few.