I have a very light (17 lb) Tilton clutch and flytwheel setup in my C6, and noticed the rev limiter did a very poor job at limiting revs during first gear wheelspin or revving in neutral. I've logged RPM as high as 7600 with extreme cutoff set to 6600.
So I set the extreme cutoff to 4000 and tried a few different things to see if I could get the limiter to kick in instantly (my latest tune is attached). Unfortunately nothing worked. I then logged a few things to try and figure out what was going on. I exported this log without interpolation (though I did manually interpolate rpm) so I could try and figure out the timing of events: https://docs.google.com/spreadsheets...mWtSQwy_TU1DYk
Part of the problem seems to be that fuel cut is not activated until the motor is past the rev limiter, sometimes hundreds of RPM past. The other problem is the engine continues to accelerate even after the rev limiter is activated, even though spark and fuel cutoff were enabled. Injector pulse width does not simply drop to zero as expected, but tapers off. I'm not sure when or if spark gets cut, as I'm not sure how to log that. The limiter finally starts to work around the time throttle position drops (on it's own, even though the ETC limiter is disabled). I'm not sure if this is coincidence, or it's the throttle closing which actually limits the motor. The dropping injector pulse width could just be a result of the throttle closing and dropping MAP.
The result is I rev as high as 5268 with a 4000 RPM extreme cutoff.
Is the only solution to this a very heavy clutch and flywheel setup? I suspect a stock pressure plate with a light flywheel would still significantly over-shoot. I'd love to be able to enable flat shifting via the park / neutral settings. The delay in starting fuel cut would even be acceptable if it just cut fuel and/or spark instantly, but it clearly does not. Maybe the solution is just an aftermarket rev limiter and two step box.
Thanks for any help.