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Sorry for the late weigh-in on this subject. I had an unusal situation where I had a low-mileage HiPo engine, complete except for the flywheel. I plan to use this engine without replacing any of the reciprocating or rotating components. It is also going into a Fairlane K-code automatic. So, I needed a HiPo flex-plate. These are impossible to find. But, I came across an NOS 302 flex-plate stamped C8OP-C and decided it would be a good candidate to have it rebalanced from 28.2 oz.-in. to 30.4 oz.-in. Not only does the NOS flex-plate give me perfect ring-gear teeth, but it will be near perfect in imbalance to add to an already perfectly balanced engine (sans flex-plate).
I talked to John Cavataio at Dynotech Engineering Services in Troy, Michigan (248-362-2777) (http://www.dynotechengineering.com/) about what they could do. He said, “we set the flex-plate up on our STR balance machine and compensate for 28.2 oz-in of imbalance on the machine’s dial plate, neutralizing the existing imbalance. We then add 2.2 oz-in of material 180 degrees from the comp weight to raise the imbalance to 30.4 oz-in.” My cost was $175. Now I have a perfectly functioning HiPo flex-plate to add to my engine assembly. Dynotech's workmanship was first-class as can be seen in the photo below.
[Blocked Image: http://www.fordsmallblock.com/Pictures/flex-plate-HiPo.jpg]
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Wise choice Bob, Dynotech does excellent work........ They can evaluate and balance full running drivetrain systems.
[Blocked Image: http://www.dynotechengineering.com/images/vehicle%20balance.jpg]
Edited by - kar-nut on 09/17/2009 07:03:31