Can anyone confirm the driver ratio for an R90S tach? I have an R90S motor in my /2 conversion and want to add a tach... Blue Moon sells the accessory tach below (for /2's) and if the ratio matches my plan would be to get the tach and the /2 tach cable. If the /2 cable doesn't work I would combine that one with an R90S cable (hopefully). Blue Moon sells a 2:1 and a 4:1 tach Also, anyone buy one of their replacement speedos and have any info?
I did ask BM, the answer was "I don't know" LOL. Wirespokes says it is 2:1, so I think I am going to pop on a tach and see what happens
几乎可以肯定我/ 6chanical tachs are 2:1. Looking to do something similar on a conversion project and used a drill to test three tach heads: 4:1 and 2:1 /2 and a mechanical /6. At max drill speed, the 2:1 /2 and the /6 heads read approximately the same rpm so assuming they are the same ratio. That said, remember what they say about assumptions :) Hope that helps.
