I have a 5.7 hemi 2013 that ive retrofitted ina 1972 car using a MP crate PCM.
It is a std 5.7 with an Inertia 209/2016 .556" cam and 6.4 intake manifold and injectors.
Initially i left the std 6000 rpm rev limit and at 5800 rpm the car would lean out massively on the dyno.
We raised the rev limit progressively as the car made max power around 6600 rpm.
However every time anything up to the rev limit in the tune sometimes 200 rpm before sometimes 600 rpm before it reduces pulse width to act as a rev limit.
Do these not have a hard cut ignition rev limit or do we rely on a fuel cut leaning us out while its still ramping up in rpm?
Ive attached a log