383 wont rev over 4500 rpm

[firefighter3931]

 
Ron, if the ICL was setup retarded, can it be compensated by "over advancing" the timing to get the powerband better at lower rpm?  or...................?

The only way to adjust the powerband is with cam timing. Advancing the ignition timing is sometimes beneficial if the engine combination wants increased spark lead but that in itself won't alter the effective operating range of the engine....but it can make the engine feel stronger/more responsive off idle. 


Ron