Quote:
Originally posted by JET@Feb 12 2004, 09:19 PM
You have to use the correct bearing size Jacek.
Raptor, I agree with Lightning, you are going to increase the pressure on the oil between the bearings if you decrease the diameter of the crank. Just like smaller diameter tires have a smaller contact patch. I would think that is a bigger possibility of squeezing the oil out than the extra speed.
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Actually, this isn't something that is just me guessing, it is proven theory. Decreasing diameter does reduce bearing surface speed. Consider it like this, in the same revolution, a larger bearing journal is going to have a larger circumfrence to cover which means higher speed on the bearing surface causing more friction at higher RPM.
As far as squeezing oil out, there would be no issues if the correct oil viscosity, preasure and bearing clearances are used.
As Vicious pointed out, on this small of a reduction in diameter, the benefit would be negligible. My main point on that was that it isn't necessarily a bad thing if the nitriding isn't affected.
And yes I am getting old, but you are still older Mike and from what I hear, Shane too! :razz2: