LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

cold weather vs timing

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Old Dec 9, 2003 | 03:02 AM
  #1  
TRIPLE G's Avatar
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From: Bradenton,FL
cold weather vs timing

Does the cold weather affect the stock timing. Reason i ask is i am running a 100 shot with stock timing. I ran the car over the weekend and it felt stronger than it has before.
Old Dec 12, 2003 | 09:38 PM
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Cool air is denser than warm air, therefore containing more oxygen. Your MAF sensor will pick up on this and the PCM will add more fuel, increasing horsepower. Cool air also allows more timing advance vs. warm air.

So, your car probably was a little stronger, since the conditions were right.
Old Dec 12, 2003 | 10:33 PM
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It probably doesnt matter but i dont have a mas. I have a 93, speed density car.
Old Dec 13, 2003 | 02:06 AM
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just because you are a speed density car does not mean you are exempt from physics....

cold air = more power, whether its in a speed density car, mass air car, lawn mower, or go kart....
Old Dec 13, 2003 | 02:13 AM
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Originally posted by SVT Killer LV
just because you are a speed density car does not mean you are exempt from physics....

cold air = more power, whether its in a speed density car, mass air car, lawn mower, or go kart....

Thank you. I am well aware of the whole cold air makes more power. The question was will real cold weather cause the car to run more timing than in warmer weather. In the case of running N20 would you want to take out a degree or two more timing than you normaly would. Or does the car just add extra fuel to compinsate for the less dense colder air and not effect timing at all.
Old Dec 13, 2003 | 02:52 AM
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good question, my mind isnt working right now so maybe someone will chime in


im assuming cold air will have less knock retard then the pcm ups the timing? now im just talkign out of my ***
Old Dec 13, 2003 | 07:21 PM
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OK now I understand. In a NA application you would want to advance your timing in cold weather because well more timing means more power duh blah blah blah...

However your question pertains to n2o, you do not want to give yourself back your timing just because it is cold. The reason you retard your timing with n2o is because the rate that the motor burns when it is on the bottle is a lot faster than NA, so by advancing your timing you run the risk of detonation from the cylinder firing too early. In short just because it is cold doesn't mean you can advance your timing on the bottle, timing is retarded on n2o for different reasons, IE the properties that nitrous have and its burn rates...I think that answers your question.
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