Wheel Slip Indicator?

[donpearsall]

Does there now exist a simple, inexpensive aftermarket wheel slip indicator (I know, I know, it's your rear end)? What I am envisioning is something like LED lights that indicate when your front and rear wheels are a certain % out of sync. This is not traction control because it does not control anything. Internet searching reveals that it is on some OEM vehicles but nothing about aftermarket devices. Anything?
Thanks
Don

[1212FBGS]

Yes its called a tachometer!......   better yet, get traction controll
Kent

[Cajun Kid]

Well all I know is this weekend at Maxton I did not need an instrument to indicate my wheel spin,, it was evident to me and anyone from the start to the quarter mile marker,,,  

"It was not a 1/4 mile Burn Out"  it was just an extreme loss of adhesion !!!

Charles

[Jasontmc]

Rick Y. used to run front and rear wheel speeds with bicycle speedos. cheap and fairly accurate when calibrated correctly.

[bvillercr]

You have two free ones, one on the right the other on the left.  If you want to keep them working good use  ear plugs.

[wobblywalrus]

Don, please post any info you find out about this.  It does not appear to be impossible.

[SPARKY]

The factory types compare the electrical signal generated by the wheel speed sensors which are nothing more than low voltage generators.  most of us run different size tires front to rear if the rear generates more it would be spinning.

[maguromic]

It wouldn’t be that hard to build one.  You could use two wheel speed sensors and a CAN interface.  Also your coding would need to have some values for acceptable wheel slip so you wouldn’t get a false reading.  But if your going to all this trouble might as well add some more functions and at that point it will be faster to use an off the shelf data logger.  Tony

[jimmy six]

I understand the Al Teague's liner had such a device. It worked thru a row small lights, green when it had no slip and a line of ambers which showed how far he was off, I heard it had come from Banks and I'm sure it was used with a data aquisition system. He controlled the slip with his right foot....JD

PS: Don't take this to the bank, I just heard about it.

[Seldom Seen Slim]

Unh, there's an expensive way to do it -- with a data logger.  For instance, our MoTeC has inputs where we send information from front and rear wheel speed sensors.  We calibrate the unit to account for the difference in wheel circumference - and then we teach the MoTeC to give us whatever output signals we want.  In the present case we have programmed it to turn on a bright yellow light, labeled "Wheel Spin" when the rear speed exceeds the front speed by 7%.  Everything is programmable.

But the MoTeC ain't cheap, and if all you're going to do is wheel slip indicating -- you can do it lots of other ways.

[robfrey]

Brandon and I were thinking of building one like Teague's.
Maybe if we built a batch of them we could all share in development cost?
How many would be interested? Might be a fun group project.

[RogerL]

I use a MoTec system and it works great. have a light that tells he when i get to a preset % slip. will be activating the traction control piece this year. because the car is all wheel drive, have had to adapt a GPS system to input the car velocity. Commercial GPS generally is not sensitive or responsive enough to provide input. i use a system made in the UK that was developed for just that purpose. as stated above, it is somewhat expensive, but the MoTec offers a ton of options for data logging and tuning. i originally bought the MoTec because of the complexity associated with running compressed natural gas as the fuel. found that it had a lot of additional features, some useful, some just cool. pm me if you would like more info.

[hayaboosta]

Don, I have wheel speed discs that bolt on the front and rear 'Busa wheels if you think that may help you. EM me if you have questions. Thanks!  Scott 

[saltfever]

Turk had something simple on the Camaro. He mentioned it was useful in another forum. Maybe Keith will speak up.

Vehicles rarely have the same diameter wheels front and back and would have to compensate somehow. Motec is out-o-my league! . . . but I am sure interested in alternatives.

[blackslax]

It could be done with prox sensors and metallic discs.  The number on each wheel would compensate for tire size.  The prox could be sent to a simple "black box" that counted each, and output the difference to LED lights.  I am not an electronics guy, but we have done similar devices for my day job.  One of my kids teachers told me what I needed to get for circuits at Radio Shack (under $30) and he put it together for me.  I then made a nice cover.  came out nice.