Hope I dont sound like an idiot here but I've been searching forums for days and cant figure out whats going on here :S
'84 318 w/ M10 engine -- bought the car with a 7000 tach in the cluster, hits the limiter @ 4200...tried a 5000tach cluster I had lying around, tach reads the same at around 4000.
I was thinking maybe its an old rotor thats reducing the limiter, but the car FEELS like its revving a lot higher than the gauge is letting on
Everywhere I looked says that M10s should rev to 6500--I dont really care about revving high I just want to make sure that my gauge is accurate, which I dont think it is :S.
I was thinking about the "coding chip" for a while, my 5k cluster has one but my 7k cluster doesnt (apparently they didnt come before 86) so wouldn't this make the cluster without the chip accurate (assuming it was from the same car)?
dont know if it has any bearing but the temp guage on each cluster is also screwed, reads all the way hot (checked fuses, grounds)
I guess if anyone could verify for me what tachs came in what models/engines, and what replaces the coding plugs in e30s prior to 86...or really give me any way to make this stupid tach read correctly