Originally Posted by chip-3door
you can get one piece for when you need to rev hard and the head not come off and land on a piston.
ive just ordered some in 214N, only about 15 quid each.
im hoping to get some nimonic80 1mm oversize ones made at some point, but they will be about 60 qiud a valve
Cool, high tensile then
So what RPM should i think about changing them for 1 piece? I mean there's not much point having high RPM with a supercharger, because with the gearing it would be boosting too much and rip itself to bits.