Originally Posted by Daddyz:
All the OEM engines will spin faster than they can breathe- I'm guessing the bottom end will take 7500 or so on any of these without issue. The real issue is spending that much time bouncing on the rev limiter. Oil pump cavitation (or downright breaking gears like the Ecotec is known to) and valve spring fatigue will end up being the big issues with this engine format (shimming an OEM spring is not the same as an aftermarket spring, folks).
I doubt you'll ever see a rod break without a bearing showing oiling issues.
So, by this (above) can I say IF RPM limits were set BELOW the revs that push the OEM pieces past their design, wouldn't that have actually saved $ & kept "2.4" "OEM" racing to it's original "pull it out of the junkyard" concept? (at it was "sold") - I understand "bouncing off the rev limiter" at any setting prolly not ideal, but - in line with the "big 3", I'd just think the lower paying "D2 STYLE" classes could do smthn of the same...NOW...