Toothed Wheel questions

Ron B. · Post by **Ron B.** » Wed Sep 17, 2008 2:03 pm

i just got home from a car rally with my mercedes. With the MJ it runs far better than I expected (shame about the broken trans band though..) .
I have to modify my wheel and Pick up set up though. At present i have the wheel mounted on the front of the pulley and i want to machine the damper with teeth to make the whole setup simpler.
Does it matter what Width with the teeth are ? because the damper is somewhat larger than the Ford wheel i am using at present.
Does it matter that the damper is steel and not segmented iron?
Heres my set up as it is presently.

Post by **brentp** » Wed Sep 17, 2008 3:19 pm

Hi Ron,

As long as the toothed wheel is ferrous metal you will be fine.

As for the width of the teeth: Yes, I believe you can make them a bit more narrow without affecting the signal quality. How much more narrow you can get away with in your situation depends on a variety of factors.

Without the proper test equipment to measure the signal emitted from the VR sensor, it is hit-and-miss: your main indicator is simply to verify if your engine continues to run smoothly and without missing ignition events. If the signal from the VR sensor is weak, the EDIS module will lose sync with the wheel and try to re-acquire. While it re-acquires the wheel, no ignition events will occur.

Can you keep both wheels on while you transition to the new design? That's the most prudent approach, so you can compare the two against each other.

Ron B. · Post by **Ron B.** » Wed Sep 17, 2008 9:33 pm

Hi Brent,Yes I have both in place to experiment. As you can see in ther picture the astock damper is somewhat larger so the teeth will be further apart I think . Should i machine them so the gap between is the same size as the ford wheel,meaning the teeth will be passing under the pickup longer, ? or should I attempt to make them the same size? .

NITROPIXIE · Post by **NITROPIXIE** » Wed Sep 17, 2008 10:02 pm

I think i can help on this, the teeth should always be 10 degrees apart (except the missing one) so if your using a bigger trigger wheel the teeth will be further aprt from each other. By doing this the teeth will not pass the sensor for longer as long as rotational speed stays the same, there will just be more metal going past the sensor.

Hope this helps and makes sense

Ron B. · Post by **Ron B.** » Wed Sep 17, 2008 11:01 pm

It sure does! many thanks!!