Was going to ask this in another forum, but figured not many people in a driveline forum have transbrakes.
I've been having trouble with reaction times. BTE pro brake in a 'glide, new (last year) K&R delay box.
Just to see if there was any correlation between my weird reaction times and trans temp, I put in a trans temp gauge a couple races ago.
Here's what I found. When trans fluid is <150, reaction times are .025-030 slower than when trans fluid is >180. One trans guy has already said 'this isn't possible', but I've got three solid races of data that seem to prove otherwise. Data log shows no difference in converter flash that I can tell or any other signs, car is as deadly consistent as anything out there.
One race was a two race in one day deal- not much time between rounds..Trans temp stayed in the 175-180 range (staging) and around 210 turning on to the return road. Reaction times made sense- had a few .50X bulbs, one .500, a .51x bulb, and one .532 (in the final, I knew I missed it a little but he was .538 and I won, so I'm not fussing about that one)
Next race was the electronics class at the Footbrake 150+50, two day deal with almost 200 footbrake cars, and around 50-60 electronics. Anywhere from an hour-hour and a half between passes. Warmed the car up good before first hit, Trans temp 1st pass was 160 (I was -.002), next pass was almost 2 hours later (and I didn't warm up trans) staged at 130, and added .010 to the box, .034. Next pass, almost the same thing staged around 140 trans temp, .030. Next pass was about an hour and a half later, took .005 out of the box, trans temp again 140, .038 and got loaded up. Next day, about the same thing, except I got lucky and went some rounds..was averaging about an hour and a half between rounds UNTIL 5th round when I had less than 30 minutes since last round, trans temp was 185 when i staged...and I was -.015/dead 9 to his .058/dead 0..(at 8 cars
Last weekend at Atmore..same thing. Warm car up, stage around 165, -.002 first time shot. Had to fix a head bolt that started seeping a little so I didnt get a second time shot. Run for the money, again, forgot to warm trans up, stage at 135, .050 reaction. First round (about an hour and a half later), same deal, didn't warm trans up, .045, and I'm in the way at the stripe. Bought back and was screwed anyway, dude threw down a .005 package on me, I was dead in the water..
All that said...is something going on with the brake, is fluid temp really screwing with it that much, or what? Right now it's got Hygard in it for fluid, we have a Thursday night TNT/Bracket deal tonight and it's gonna get some Type F put in it if I can find some, to see if it makes any difference.
It could be me, but after doing this off and on 20+ years (plus what the practice tree tells me)...if it were .010-.015 different, I'd believe it could be me. But not .040-050, sorry I aint buying that.
Had a couple trans guys tell me there's no way that fluid temp is causing the 'brake to release slower or faster. Any ideas or opinions??