HHR SS Topics and information on the 2008-2010 Chevy HHR SS Turbocharged models.

Launch Control Mode - RPM

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Old Nov 20, 2009 | 09:33 AM
  #1  
WS6's Avatar
WS6
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From: Denton, Texas
Launch Control Mode - RPM

When driving my "08 SS - Auto, I mash the gas pedal, and the engine will only tech up to 3000 rpm. All the posts I have read on this forum says everyone's SS revs up to 4000 rpm in Launch Control Mode.

Whats up with mine.
Old Nov 20, 2009 | 12:14 PM
  #2  
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Originally Posted by WS6
When driving my "08 SS - Auto, I mash the gas pedal, and the engine will only tech up to 3000 rpm. All the posts I have read on this forum says everyone's SS revs up to 4000 rpm in Launch Control Mode.

Whats up with mine.
maybe different for the auto?
Old Nov 20, 2009 | 01:07 PM
  #3  
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XXL
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Somebody with an auto and HPT should be able to look this up in the stock tables.
Old Nov 20, 2009 | 01:15 PM
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AFAIK, the Autos will rev up to 3200-3500 rpm (don't remember EXACTLY where the tach was when I was testing mine, but it was in that vicinity). Manuals will rev up to 4100 rpm's I believe. I'm pretty sure they did that to avoid too many people from grenading the tranny if they were foolish enough to do neutral drops or had too much tire slippage under the wrong conditions...

Later
Allex
Old Nov 20, 2009 | 01:18 PM
  #5  
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How do you keep from just smoking the tires?
Old Nov 20, 2009 | 01:36 PM
  #6  
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Originally Posted by ckriensky
How do you keep from just smoking the tires?
Press on the gas lighter? I am not too sure, each time I try LC I light them up. Caused me to go through a set of the Michelins in about a year. Plus, I race too much.
Old Nov 20, 2009 | 05:24 PM
  #7  
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Originally Posted by asanti
AFAIK, the Autos will rev up to 3200-3500 rpm (don't remember EXACTLY where the tach was when I was testing mine, but it was in that vicinity). Manuals will rev up to 4100 rpm's I believe. I'm pretty sure they did that to avoid too many people from grenading the tranny if they were foolish enough to do neutral drops or had too much tire slippage under the wrong conditions...

Later
Allex
Your beliefs are true. I have the fiver, tried it out several times and it steadys on 4100rpm in LC mode.
Old Nov 21, 2009 | 12:00 AM
  #8  
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I believe the auto is low because of the tq converter stall...in neutral it will peg at 4100....in gear its in the 3k s
Old Nov 21, 2009 | 06:50 AM
  #9  
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Originally Posted by IgottaWoody
I believe the auto is low because of the tq converter stall...in neutral it will peg at 4100....in gear its in the 3k s
That is correct. the stock converter stalls at a much lower RPM.

Not most new GM cars are limited in netral today. You can stand on the gas and only go to 4100 RPM. GM has a built in rev limiter that changes in gear. I am not sure but have seen this on several throttle by wire systems. They all seem to have it.
Old Nov 21, 2009 | 10:11 AM
  #10  
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Yes, stock converters always rev low.... that and the whole sucking up enormous amounts of usable power for us auto guys!



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