High IAT count/ does it pull timing?
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TECH Regular
Joined: Dec 2001
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From: So cal.
High IAT count/ does it pull timing? My last visit to the track my iat was 133 when i launched and my timing seemed to be low on that pass. The next pass i let the car cool for an hour and went a tenth and a half faster, laptop was dead so i couldnt a-tap to compare the timing and the iat.Do high temps pull back the timing?
<small>[ August 02, 2002, 11:00 AM: Message edited by: mjf454 ]</small>
<small>[ August 02, 2002, 11:00 AM: Message edited by: mjf454 ]</small>
Re: High IAT count/ does it pull timing? Hotter intake temps put the PCM on a "milder" timing table. So, yes, hotter intake temps will drop your timing. Additionally, the hotter intake temps increase the KR reaction.
An iffy solution to this problem:
You can replace the inlet air resistor with a set value resistor, or timing tricker, as we call it. This will fool your computer into thinking it is colder outside and keep you on the more aggressive timing tables.
HOWEVER, there is a catch. If you car cannot handle the additional timing (ie you have KR) then the timing tricker will actually give you a negative effect, and all of your power will disappear into knock retard.
Good Luck
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
An iffy solution to this problem:
You can replace the inlet air resistor with a set value resistor, or timing tricker, as we call it. This will fool your computer into thinking it is colder outside and keep you on the more aggressive timing tables.
HOWEVER, there is a catch. If you car cannot handle the additional timing (ie you have KR) then the timing tricker will actually give you a negative effect, and all of your power will disappear into knock retard.
Good Luck
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Teching In
Joined: Jul 2002
Posts: 24
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From: Right Coast, USA
Re: High IAT count/ does it pull timing? With my 2002 Z06:
At an IAT of 90 degrees F you lose 1 degree of timing. By 140 degrees F you lose 7 degrees of timing. See my post near the bottom of this page:
http://www.z06vette.com/forums/showt...4&pagenumber=2
At an IAT of 90 degrees F you lose 1 degree of timing. By 140 degrees F you lose 7 degrees of timing. See my post near the bottom of this page:
http://www.z06vette.com/forums/showt...4&pagenumber=2
