I just got back from burningman, so I was way behind in my email.
On Fri, Aug 25, 2006 at 10:14:17PM -0400, Jim Juhas wrote:
# I'll weigh in on the question of clearance. I think "tolerance" is the
# wrong word here.
Correct, clearance is the correct word.
#
# The shop that did the bearing work on my 5.0L ford engine for my Cobra
# replica selected bearings individually for each journal to give me
# greater clearance than the middle or low end of the tolerance range, his
# premise being that an engine being pushed harder develops more heat and
# should have proportionally greater clearance at cold. He builds lots of
# race engines.
With the motor being supercharged, the tighter clearance means that
the rod would not bang as hard on the journals. The thinner oil is to
compensate for the tighter clearance and get the oil flow. We also
looked around quite a bit to find a set of the good (practically NLA)
clevite bearings.
I'll check it with plastigage and see what sort of clearance I'm
getting.
--
Software that holds your hand is one thing, software that holds your
hand and won't let go is really, really annoying.
Larry Colen lrc@red4est.com http://www.red4est.com/lrc
|