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how does the rev limiter work?

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Old Jul 19, 2006 | 09:15 PM
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Default Quick rev limiter question.

What method does GM use to limit RPM on a factory LS1 engine? Does it pull fuel, spark or a combination?

Thanks!
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Old Jul 19, 2006 | 10:12 PM
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I belive it cuts fuel
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Old Jul 19, 2006 | 10:13 PM
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Originally Posted by Sgt. Spuds
I belive it cuts fuel
Same here. Not 100% sure on the spark but I know it cuts fuel...and I think that's all it does....
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Old Jul 20, 2006 | 05:51 AM
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I Believe it controls both.. Don't quote me on that though.
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Old Jul 25, 2006 | 09:20 AM
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Yup, its a fuel cut off.
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Old Jul 25, 2006 | 08:29 PM
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if it cuts fuel, shouldnt it slow down then?
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Old Jul 25, 2006 | 09:00 PM
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not if it cuts enough off just to stop pulling. if your rev limiter is 6700 rpms and it only supplies enough fuel to reach 6700 rpm's, bouncing off the rev limiter will hold you at 6700 rpm's. it just won't let you have enough fuel to let you go higher.

don't quote me on that, that's just common sense telling me what to post.
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Old Jul 25, 2006 | 09:31 PM
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Originally Posted by ChocoTaco369
not if it cuts enough off just to stop pulling. if your rev limiter is 6700 rpms and it only supplies enough fuel to reach 6700 rpm's, bouncing off the rev limiter will hold you at 6700 rpm's. it just won't let you have enough fuel to let you go higher.

don't quote me on that, that's just common sense telling me what to post.
thats pretty much what i was thinking cause they were saying that it was cutting the fuel off which to me means letting your foot off the gas or having the computer doing that when it gets to that point, cause i know when ive hit it, it was bouncing off the rev limiter tell i let off, but if its just cutting enough fuel to stay at that point, that makes more sense to me cause of it staying up in rpm then slowing down. thanks for clearing that up.
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