adjusting cams was Re: [Shotimes] Help with engine stumble in 95 MTX

[bjshov8]

When you regrind a cam without welding it you reduce the base circle,
meaning you need thicker shims to set proper valve clearance.  This doesn't
imply increased lift because the top of the lobes could be treated several
different ways- you can have higher lift, increased duration, or a little
bit of both.  If lift was increased then it could become an interference
engine.  However "could" and "does" are 2 different things.

> Don't the +.020 and +.040 cams have thicker valve lash caps that are added
> somewhere? On top of the valve stem? and beneath the lash cap? I forgot
> about those. That must be enough to make it an interference engine.