i have me pcm tuned and it is supposed to shift at 6600 and revlimitor is at 6800...but the other nite i was at the track and saw the tach as iwas crossing the lines and it was at 7000+ looked about 7150????
i hope my tach is for some reason FASTER than what real rpm are???
but i thought they were typically slower
thanks
daniel

 

Yeah i have heard that they are up to 200 rpm's off sometimes so i wouldnt be worried

 

yes, stock tachs are off

 

My tach is pegged WAY before i hit my 7100rpm limiter..

 

My tach reads ~200rpm higher than the scanner indicates at idle. I used to be a little concerned about a +/-1000rpm idle, but 800 seems right for an M6.

 

Ditto

 

i just put a new autometer tach in today,and at idle the stock tach is 500 rpms off from the autometer tach.