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How high has the bar been raised?

There's an early "soft" rev cut on OEM tune (fuel based, goes overly rich), I believe, to make the hard rev limit (ignition cut) put less strain on the motor.

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Old 02-07-2014, 04:08 PM   #13 (permalink)
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There's an early "soft" rev cut on OEM tune (fuel based, goes overly rich), I believe, to make the hard rev limit (ignition cut) put less strain on the motor.

You'll see little "divots" in the dyno graph as you approach rev limit on a factory tuned motor, just before the OEM ignition cut.

I'm intrigued by where this all goes, but I am guessing either a seriously ported and polished head and/r different IM will be needed to really capitalize on the higher rev limit.

On a related note, will the VVEL maps (if untuned) be able to extrapolate beyond, say, 7800?

Would love to see someone with stiffer valve springs and a massaged head/IM combo (and, I guess a VVEL tune plus different exahaust cam) push it into the 8+ K range. If torque didn't drop off, that would be a seriously powerful, screaming to redline VQHR.

This is all pretty uncharted territory, at least as far as I know, so looking forward to more details as this comes together
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Last edited by Jordo!; 02-07-2014 at 04:11 PM.
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