[Signman]

For years NHRA has not allowed wheel and driveshaft sensors directly connected to ECU internal data loggers. Bo Kenney warned me about that in 2009 when the season before he was checked at several national events. As part of your agreement to race this access is granted same as checking your carb. If NHRA lost the equipment or has no one trained is on them it's simple as accessing the ECU and looking at settings. The list of approved ECUs is known accessing each and what to look for can be provided by manufacturer with basic computer skills, minimal training and a guidebook for each it's easy.

If you are logging DS speed it must be a separate device the sensor cannot be directly wired to the ECU disabling traction control.
It's all about traction control and wheel counting.

What brought attention recently was a pro mod team not allowing NHRA to look (so they have the ability) the argument being exposing fuel and timing maps which are proprietary to the team may be copied and shared. If the team had doubts about NHRA personnel morality or had something to hide is between them and NHRA.

What you do with your car is your business and NHRA if there are any doubts. Years ago I was questioned about having a transbrake. Funny thing I didn't have a 2 step never have!

By the way MSD Grid can do with a carb combo most of what EFI ECU can do.