Originally Posted by feets
oopsie! I forgot about the 6 speed thing.
On the rollers, that was an incomplete thought. I am wondering how close the speeds must be between the front and rear speed sensors to relieve the problem.
I wonder if there's not an easy way to mount a second set of speed sensors on the rear wheels.
When I converted the hot rod to EFI, I was going to need a second crank position sensor at an exact distance from the first. It was only firing half the engine because it was set up for a dual rotor RX-7.
I've got a machine shop at home where the garage used to be. Fabbing something up would be no biggie but I haven't taken the wheels off the car yet.
I had thought about a box with a motor with and a couple of sensors fitted to a toothed wheel too, but just figured it would be easier and cheaper with electronics. I guess its a case of each of us using whatever facilities and expertise we have to hand. How closely the speeds have to match may be an issue like you mention, but I will be taking the speed signal from a rear wheel sensor so the replicated front sensor signal will exactly track the rear just as it would on the road. The mechanical method may need you to try and track the motor speed manually as the car is run up on the rollers. The system definitely needs to see 4 good wheel signals above 30k km/h (I think from memory) to reset the ESP/ABS system after reconnecting any of the sensors. Which suggests the speeds need to be within the bounds of what is expected to occur in real world conditions.