Maybe have some sort of rpm sensing system with a reflector attached to the rear wheels & have a sensing device in tech fire up the car on the bench you should be able to hear the difference & see the diference on the rpm sensor.
I have a real concern about this I have an older Novak & cannot afford 200 clams to buy a new one at this time.
I can understand that completely. Which is why the rule is there I just be sure we can enforce it correctly.
After getting some question from people as far as how many speedo we will have on hand at the champs. I would like to inform everybody While we are not sure how many we will get, there is a good chance we will have them to sell at the champs.