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Purpose of rev limiter by temp table?

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Old Mar 21, 2002 | 05:57 AM
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From: Cecil County Raceway!!!
Default Purpose of rev limiter by temp table?

It was listed in degrees C and had reduced limiter values (5000) at temps at and over 100C

I couldn't find a rationale reason for this since if you look at the revlimiter delay, at temps over ~140F, there was no delay going from the rev limit by temp to rev limit by gear table. So it seemed to contradict itself <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
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Old Mar 22, 2002 | 06:04 AM
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From: Cecil County Raceway!!!
Default Re: Purpose of rev limiter by temp table?

this is the table I'm talking about...temps are listed in degrees C so this is well beyond the operational temp of the engine <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

<img src="http://www.wam.umd.edu/~krzew/temptable.jpg" alt="" />
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Old Mar 23, 2002 | 10:45 PM
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Default Re: Purpose of rev limiter by temp table?

I just changed the rev limiter today, used HPP3 (download) as a sanity check. HPP3 does not differentiate from its rev limit values and places the selected value in the table. I put my target rev limit in the temp table for all the IAT's that I might be running at the track in cold weather (phx not too cold)
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Old Mar 24, 2002 | 07:29 AM
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Default Re: Purpose of rev limiter by temp table?

Rev Limiter by Temp table simply prevents you from over-revving a cold motor (or a VERY hot one).. nothing more than that...

You can test this out.. set the lower temp rev limits to something safe (say 2500).. and start your cold motor, you will be prevented from reving past 2500 until the engine warms up.

IMO this is nothing but a safety feature to make sure the car is at least a little bit warmed up before you go redlining it....
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