Taboo.......Davis traction control

[billetbirdcage]

speaking of drag racing , i saw a article several years ago about a control device that used a sensor on the front wheels and the drive shaft to control wheel spin , i have wandered if this would work on a dirt car using the rt frt wheel , which is always on the ground and the drive shaft , you ever heard of this billet ?

That's how they all work when I say a senor based system or one that actually measures wheel spin. All you need is a vehicle speed, that can be a front wheel sensor or anything that would measure the speed of the car like a ground speed sensor or GPS. Then all you need is something to measure rear wheel speed, that could be anything from just a RPM signal, rear wheel speed, driveshaft speed or anything from the crankshaft to the tire. The last thing is a way to stop wheel spin, IE throttle, brake or timing control.

The issue with sensor based stuff is reliability and hiding it. Using a tach or RPM signal for rear wheel speed is easy to hide but you would need to adjust the computer for every gear change or tire size change. While not hard, your going to have to remove computer from car to adjust the ratio or drive the car and have a way to reset the zero spin %. This can be a red flag, that something is up. Then you still have the vehicle speed sensor/item to hide.

Actual sensor based systems can actually control the wheel spin to a set %, I had one where I can just drive like normal but instead of modulating the throttle off the corner I just hold it to the floor. It would adjust the throttle 7 times a second to keep the wheel spin at the % I set it at. The problem with this was there are sensors on a front wheel and a rear wheel, then a Tee in the power steering to power/move the servo to work the throttle, power steering solenoid, a computer, wires and etc. Back then it wasn't known about thus not illegal so you didn't have to go crazy hiding it as no one knew to look for anything.

Now, could a guy get away with this today? Not real likely, but I feel like if I tried I could probably slip this by most sanctioning bodies but it would be a lot of work. I won't get into a ton a details but someone that's pretty knowledgeable about these types of systems really only has to look for a few items and trace that stuff back. No matter how good you hide something, there are things that have to be there and if you follow that stuff closely on the car and don't assume that firewalls and what not aren't double walled and if a like or wire goes thru something it in fact comes out the outer side with no Tee off it. Given 20 to 30 minutes of time, I feel I could find TC on about any car excluding timing based systems since there isn't any way to check the electronics of that quickly and be accurate.

[Kromulous]

Hey Billet from your studies, how much tire spin % can there be on a dry slick type track, something cleaned off with some black all around? We were sitting around talking about this in the pits, most guys couldnt comprehend how much tire spin there could be in these conditions.

[billetbirdcage]

Hey Billet from your studies, how much tire spin % can there be on a dry slick type track, something cleaned off with some black all around? We were sitting around talking about this in the pits, most guys couldnt comprehend how much tire spin there could be in these conditions.

Open engine LM average slick track (not super super slick):

Vehicle speed low 70's MPH
Rear tire speed just over 100 MPH

As an average, on this track average actual vehicle speeds where around 65 to 95 MPH, rear tires where generally going 20 to 30 MPH faster then vehicle was at any point the driver was on the throttle.