[jimbobiggens]

All car manufacturers test the fool out of their computers so they
1: don't break anything and last past the warranty period
2: make the non-car guys happy with the idle and smoothness
3: make the gubbermint happy with emissions.

This leaves quite a bit on the table as far as performance goes. The Formula 1 ECU I mentioned was tuned with a completely different set of lookup tables from the production 5.0 GT. The actual hardware was the same as production, though.

The aftermarket doesn't have those restraints, all they have to do is declare them "off road use only".

Sometime in the '90's they went from 15 mhz to 45 mhz for the processor and upped the memory from 64kb to 1000kb. As far as I know, that hasn't changed although Ford is kinda tight-lipped about the Coyote engine's ECU.

All I'm trying to say is the rev limit is not because the computer can't handle the speed. The hardware is not the limiting factor, the software is. Maybe the guy misspoke, or the other guy heard him wrong.