At 07:45 PM 03/25/2005 -0800, Bill Babcock wrote:
It would be a very worthwhile endeavor to get a smaller crankshaft pulley
or a larger waterpump pulley. We probably need about 60-70 percent of the
pump speed we have now. It would require some testing and some engineering,
but it seems like a worth project. Ken--have you ever considered doing
something to fiddle with the pulley ratios?
Remember, slowing down the water pump will further reduce the coolant
pressure in the block. You want decent coolant pressure in the block to
quench the steam bubbles that will form, and the inherent poor coolant flow
towards the rear of the block makes #4 the target for localized overheating.
I'd be cautious with this approach to finding more ponies, especially if
you have had cylinder #4 overheating issues.
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