Slow AT shifts during Nitrous
10-31-2006, 01:16 PM
#1
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Slow AT shifts during Nitrous
So during WOT w/o nitrous my shifts are quick and crisp. During nitrous runs they are long. What could this be? Is it because of all the power the transmission is receiving or because the nitrous doesnt turn off during shifts? Im thinking a window switch will fix this problem some but maybe I just need an engine damper? Oil was changed on the transmission like two weeks ago and yes I have a transmission cooler installed.
11-04-2006, 07:10 PM
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Originally Posted by sciontctuner87
i have an 05 tc auto with a 50 dry shot and my shifts are great i run a 16.3 without it and 15.0 flat... my rpms never go below 4500 and i lunch at 2200 rpms
are you neutral dropping it? (that's horrible for your tranny... not to mention that you are running nitrous on top of that stress.... youch!)
11-04-2006, 08:30 PM
#14
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hey if you are running nitrous you really arnt worried about that kinda stuff but it is more the brakes than the tranny and it is not going to hurt anything at all if you are doing it at the tree for like 1 sec come on guys and yes brake torquing really helps
11-04-2006, 08:35 PM
#15
not really, it is much more then tranny. That is a lot of torque to be holding back. it is also making A LOT of heat in the tranny. stress and heat are the 2 main reasons why AT's break down.
Also, theres lots more stress on the brakes when stopping at 50~ mph then there is when youre brake torquing. Theres no actual friction between the rotors and the calipers when the car isnt moving
Also, theres lots more stress on the brakes when stopping at 50~ mph then there is when youre brake torquing. Theres no actual friction between the rotors and the calipers when the car isnt moving
11-04-2006, 08:52 PM
#17
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Everybody that races an auto tranny has to powerbrake it. That's the only way you're going to get a decent launch. Plus you'll need to shift it manually, as opposed to what I saw a bunch of people saying in another thread ("just let it shift itself, that's the best").
11-04-2006, 09:05 PM
#18
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Isn't shifting an auto like a manual really bad? And besides when you do that, the engine shifts even slower in my opinion because you have to take your foot off the gas. Eh, maybe it does work but I haven't been able to make it. lol.
11-05-2006, 12:27 AM
#19
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Dude you dont need to shift it manually. Basically what I think will fix my problem is getting a window switch to cut off the nitrous right before it shift. 6100rpm. And NO i will not go down to a 35 shot!!!
11-05-2006, 01:42 AM
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Originally Posted by XD40tC
Dude you dont need to shift it manually. Basically what I think will fix my problem is getting a window switch to cut off the nitrous right before it shift. 6100rpm. And NO i will not go down to a 35 shot!!!
a window switch wont help between shifts, you pick two RPM levels and nitrous will only spray in those levels... usually 3000-6100 is a good range... during a shift you are definately in that range.... so tell me again, what's the point?
Oil was changed on the transmission like two weeks ago and yes I have a transmission cooler installed.
don't waste money on a window switch if you think it's going to help your shifts (it wont, but it would help you from triggering nitrous at too low of an rpm level...
good luck! and I hope you get some help from my advice
