Vintage Mustang Forums - View Single Post - Pulley change, what to expect?
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post #5 of (permalink) Old 08-03-2019, 11:22 PM Thread Starter
groho
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Join Date: Nov 2005
Location: norcal
Posts: 715
On the longer courses, 1 min or so the turns are not as tight so borgeson/saginaw ham can responds extremely well, especially in the slalom. But when you get to the smaller 30-40 sec tight courses, with extremely tight low speed turns, the pump doesn't like coming off a high speed scenario and then suddenly dropping to near idle rpm and turning full left or right. I made some control valve changes early in the year that worked very well in the long courses, but was obviously cooking the pump at 6500. I'm thinking Turnone had some very good feedback and "slowing the pump down" to stop the cavitation. With that I also changed the control valve back to stock, and did the pulley change..... fingers crossed.
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