Optimum Tranny temp at the track.....
06-11-2009, 09:29 AM
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Optimum Tranny temp at the track..... Was hoping to get some feedback on what tranny temps some of the drag race crowd is seeing. I have a 4l60 with a 4k edge stall and last night I was seeing 220 degrees on the tranny temp... thoughts?
06-11-2009, 09:41 AM
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06-11-2009, 10:29 AM
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I have a tranny cooler and no, I don't let it idle in the pits. I don't use a trans brake but I do come up to 2700 on a 2 step.
06-11-2009, 11:05 AM
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that's interesting, I will check on that. Definately makes sense.
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06-11-2009, 12:03 PM
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I dont like to pull to the line till the tranny temp is at or below 150. Sometimes it doesn't happen that way though. The closer you get to a final, the less time you have for a cool down, but I take what I can get. Full throttle 2-3 upshifts with a hot tranny will eventually make your 3-4 clutches go by-by.
Mec
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06-11-2009, 12:20 PM
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I dont like to pull to the line till the tranny temp is at or below 150. Sometimes it doesn't happen that way though. The closer you get to a final, the less time you have for a cool down, but I take what I can get. Full throttle 2-3 upshifts with a hot tranny will eventually make your 3-4 clutches go by-by.
Mec
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06-11-2009, 02:50 PM
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Depending on what you have done to the computer, it reads tranny temps and coolant temps and retards / advances timing accordingly. Cool the engine down too much and the VCM will make sure the timing gets cut back. Get the tranny too hot and the same thing happens. I cooled my stuff down and even iced the intake and slowed down 0.29 seconds. A non VCM controlled car would have picked up. I turned all those intake air temp and engine coolant relationships off in relation to timing and did the same thing with cool water and ice a few weeks later and picked up 0.22 seconds from the prior run.
You can cool it or heat it all you want, but until you take control of the computer, it will compensate accordingly.
You can cool it or heat it all you want, but until you take control of the computer, it will compensate accordingly.
06-11-2009, 02:57 PM
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Depending on what you have done to the computer, it reads tranny temps and coolant temps and retards / advances timing accordingly. Cool the engine down too much and the VCM will make sure the timing gets cut back. Get the tranny too hot and the same thing happens. I cooled my stuff down and even iced the intake and slowed down 0.29 seconds. A non VCM controlled car would have picked up. I turned all those intake air temp and engine coolant relationships off in relation to timing and did the same thing with cool water and ice a few weeks later and picked up 0.22 seconds from the prior run.
You can cool it or heat it all you want, but until you take control of the computer, it will compensate accordingly.
You can cool it or heat it all you want, but until you take control of the computer, it will compensate accordingly.
06-11-2009, 03:02 PM
#12
Depending on what you have done to the computer, it reads tranny temps and coolant temps and retards / advances timing accordingly. Cool the engine down too much and the VCM will make sure the timing gets cut back. Get the tranny too hot and the same thing happens. I cooled my stuff down and even iced the intake and slowed down 0.29 seconds. A non VCM controlled car would have picked up. I turned all those intake air temp and engine coolant relationships off in relation to timing and did the same thing with cool water and ice a few weeks later and picked up 0.22 seconds from the prior run.
You can cool it or heat it all you want, but until you take control of the computer, it will compensate accordingly.
You can cool it or heat it all you want, but until you take control of the computer, it will compensate accordingly.
