Bracket racing an auto rs

I'm bracket racing my 05 subi RS. If you really don't know what bracket racing is, its hard to explain. I am having trouble keeping the car consistant. Does anyone bracket race a subi before, or does anyone know how to change the shift points on an 05 RS? That might be the problem

Thanks

Could the temperature of the transmission fluid affect the shift points, if by just a couple hundred RPM?

How is it inconsistent? Is it shifting differently on each run?

I drive about a a 10-15 mile trip to the track, get there, tech, and run. it goes about 17.15-17.25 the first run. Then it goes about tenth slower every run after that. I havent looked at the shift points carefully, but the engine temp gauge is the same every time. The lauch RPM is the same, every time. I figured out where on the track the problem is. Its in the 60 and 330 ft. I dont have a gauge for the tranny temp so im not sure. ill clock the RPM points. 2 weeks in a row it did about the same thing. i dont know
Thanks

I'd say get more gauges, that way you can see what's different on the car every time. But I would surmise, as you have, that it's a temperature thing.

but it really couldn't be the tranny fluid temp because the auto is an electric shift. But ill get a more specific temp guage becasue the stock one sucks

Yeah, I guess temperature as well because I get onto a highway less than 2 blocks out of the parking lot at work, and on cold days it takes about 3/4 of a mile for it to heat up enough to kick into high gear (A crappy 88 Camry, also an automatic).

If the car sits for longer between subsequent runs than it does before the first one, that might give the tranny fluid enough time to cool and thicken up. Not noticeable on the street, but against a clock over 1/4 of a mile, it could be.

Yeah. We're talking tenths here. But every hundredth counts sometimes on a drag strip. Even though it's an electric shifter, it could still be a transmission fluid issue. The temperature of the fluid will affect the length of time it takes to actually move the gears around.

I have tried for a few runs(not a lot) to idle the car while im in the lanes, but other then that there is really no way that I can control the temp because i can't turn the cooling system on and off other than letting it idle. i'll keep testing