very crude rev limiter on 7747 ecm.....

[Fast355]

Sounds like it's time to add a 6AL, and have a proven limiter.

Stock RPM/Speed limiters kill fuel so I don't see killing fuel as overly harmful.

[Six_Shooter]

Stock RPM/Speed limiters kill fuel so I don't see killing fuel as overly harmful.

Nothing wrong with killing fuel, provided it's the ECM doing it, so that the entire injection event is killed and not cut off part way through an injection event causing a lean condition.

My suggestion was based more on the "add this" and "add that" posts and ideas that were starting to creep into the discussion. The 6AL is a proven and reliable soft touch rev limiter that prevents fuel loading up, due to the way the cylinders are dropped out.

[lionelhutz]

You can't ensure the fuel is present at the right ratio for one combustion cycle and then cut-off the next when using a TBI, no matter how good the PCM is.

[Fast355]

You can't ensure the fuel is present at the right ratio for one combustion cycle and then cut-off the next when using a TBI, no matter how good the PCM is.

^^^^