How high do you want to go. Mine have seen 8000rpm.
As you can hear, they have no probs at high revs - this test wasn't big enough to get really serious either :) Its nothing for the shift light, set at 7500rpm, to be lit for an entire run. The previous tacho would sit on the stop which was at 8000rpm.
Solids in my 3k after a big rev were always out of adjustment anyway. So there was never an advantage. The maintenance side sucked.
IMHO a lot of other issues are blamed on the lifters .
Now I'll just wait to be yelled at :cool: