What does a rev limiter sound like?
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,185
Likes: 0
From: New Wilmington PA
What does a rev limiter sound like?
I heard an unpleasant noise some time ago near 5500 rpm. The car lost power and went "kluff de kluff kluff" (best I can do with text). Kind of sounded like I had hit a garbage bag and it was stuck under the car for a second.
So... I'm looking for a description of what a rev limiter sounds like.
So... I'm looking for a description of what a rev limiter sounds like.
Instructor
Joined: Nov 2004
Posts: 100
Likes: 0
From: Brisbane Queensland
Depends really on the type of cut being imposed, if its a fuel cut or a spark cut, sometimes they can sound like you described, sometimes like a backfire (thats what it sounds like on a supra anyways when hitting 7500 rpm) 
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I have bounced mine off the limiter a lot. It just sounds like it is missing (which is actually wha tit is doing). Mine cuts out individual cylinder so it does not load up any and backfire. I have mine set at 7000 but to try it I dialed it back to 5000 and just stood on it. Let it bounce for a few seconds just to know what it felt like. Now when it bounces off at 7000 I know exactly what it sounds and feels like.
Drifting
Joined: Nov 2002
Posts: 1,951
Likes: 1
From: Shore NJ
Originally Posted by Gordonm
I have bounced mine off the limiter a lot. It just sounds like it is missing (which is actually wha tit is doing). Mine cuts out individual cylinder so it does not load up any and backfire. I have mine set at 7000 but to try it I dialed it back to 5000 and just stood on it. Let it bounce for a few seconds just to know what it felt like. Now when it bounces off at 7000 I know exactly what it sounds and feels like.
Burning Brakes
Joined: Nov 2004
Posts: 1,028
Likes: 0
From: San Antonio Texas
am told hitting the rev limit frequently is hard on the drive line and can expand mufflersexhaust systems due to backfiring in exhaust (gas buildup). therefore, i'd say a rev limiter could sound like a big VISA bill!
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 1,185
Likes: 0
From: New Wilmington PA
Very interesting replies. Thanks guys. I've only gone past 5000 RPM twice on this EFI setup since I kind of have to pick the right time and place to tune that area of the maps. The first time I heard a tremendous bang followed immediately by a quieter bang. The second time was as I described above. At first I thought it was detonation so I took some timing out. When it happened again I began to wonder about the temporary, el-cheapo, tachometer I'm using. I'm now fairly certain the while the tach was reading 5100 I was actually closer to 5500. I never thought to check for this in the logs and I don't have them anymore.
By the way.. the rev limiter seems to be a two stage type. Exactly how intelligently it works I don't know
By the way.. the rev limiter seems to be a two stage type. Exactly how intelligently it works I don't know
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Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Originally Posted by greyghost79
am told hitting the rev limit frequently is hard on the drive line and can expand mufflersexhaust systems due to backfiring in exhaust (gas buildup). therefore, i'd say a rev limiter could sound like a big VISA bill!
