IIRC, traction control devices are illegal in bracket racing. At least anything with real time display. That said, programmable digital ignitions are perfectly legal, stupid NHRA...
You would have to be able to decipher code to catch some of todays cheaters, and first you'd have to find it!

And before some idiot comes on here and says it's simple just do it like we did back in the 70's and take all the electronics out. Let me say I LOVE electronics racing. It's a numbers game and I love numbers. Most of the guys around here ain't much smarter then me, lol, so not to worried about them cheatin'. Now the big money races, the Winter Series, etc. that is another story.