S2000 Engine Management Engine management topics, map and advice.

Stock rev limiter

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Old Aug 4, 2010 | 07:36 PM
  #31  
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Originally Posted by gernby,Aug 4 2010, 10:55 PM
It's the combination of it climbing slower and dropping faster that makes the rev limitter more rapid.
a slower climb will not make it to the limiter as fast, thus increasing the delay between fuel cuts. so i dont' understand how that can make anything faster?

depending on the level of part throttle we are talking about, the climb rate is more subjective - it can be much slower than at WOT throttle or also most the same...
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Old Aug 5, 2010 | 05:29 AM
  #32  
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Originally Posted by thesilverbullet,Aug 4 2010, 10:36 PM
a slower climb will not make it to the limiter as fast, thus increasing the delay between fuel cuts. so i dont' understand how that can make anything faster?

depending on the level of part throttle we are talking about, the climb rate is more subjective - it can be much slower than at WOT throttle or also most the same...
I think we are probably talking about 2 different setups. I set my rev limitter at 8500 and my rev limiter recover at 8499. In this case, the slower climb really just reduces the amount of overshoot. If I set the recover RPM lower, then I could see how the slower climb at part throttle would slow down the oscillation.
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Old Aug 5, 2010 | 06:05 PM
  #33  
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Originally Posted by INTJ,Aug 2 2010, 11:55 PM
So the buffer is to 8,500 and two of you are hitting 8,700?
same as gernby i softened up the timing and got it down it 8600 and i've softended it more but i haven't dataloged since the last change

here's the latest results

first cut was at 8455 (in 4th gear)

2nd @ 8600
3rd @ 8561
4th @ 8551
5th @ 8600
6th @ 8542
7th @ 8522
8th @ 8600
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Old Aug 5, 2010 | 06:16 PM
  #34  
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[QUOTE=gernby,Aug 5 2010, 09:29 AM] I think we are probably talking about 2 different setups.
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Old Aug 5, 2010 | 07:18 PM
  #35  
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The higher recovery point was not to soften the rev limiter. I just didn't want to pay any unnecesary penalty for riding the rev limiter at an autocross. If I'm going to ride the rev limitter, I want it to stay as close to 8500 as I can keep it.
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Old Nov 5, 2010 | 09:19 AM
  #36  
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I finally got my setup and was looking at the tables. Gernby, My Hondata stock setting put rev limiter at 8200 for the AP2, and Silver the VTEC window is 5900-6400. It does not appear that timing is retarded at all near the limit. Unless I'm misreading it, it is still max 40 deg advanced at the limit.
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Old Nov 5, 2010 | 11:53 PM
  #37  
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i guess launch control is a bad idea

what if u cut ignition instead of fuel?

My friend has an ignition cut on his n/a si it shoots huge fire balls
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Old Nov 8, 2010 | 08:34 AM
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You would not want to cut ignition instead of fuel, since that may fuel wash your cylinders, contaminate your oil, damage your catalytic converter, and create a lot of soot on your back bumper.
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Old May 30, 2011 | 06:47 PM
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Originally Posted by gernby
You would not want to cut ignition instead of fuel, since that may fuel wash your cylinders, contaminate your oil, damage your catalytic converter, and create a lot of soot on your back bumper.
You would if you're trying to keep a turbo spooled

Yes back from the dead.
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Old May 31, 2011 | 04:53 AM
  #40  
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Originally Posted by spectacle
Originally Posted by gernby' timestamp='1289237676' post='19782880
You would not want to cut ignition instead of fuel, since that may fuel wash your cylinders, contaminate your oil, damage your catalytic converter, and create a lot of soot on your back bumper.
You would if you're trying to keep a turbo spooled

Yes back from the dead.
How would unignited fuel help keep a turbo spooled?
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