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Kirkham Motorsports

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Old 03-24-2015, 04:33 PM
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Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
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Well that was one heckuva project! You know I like anything that includes pics like that. Very nice. Of course, you could of always just bolted on a torque strap....
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Old 03-24-2015, 04:44 PM
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Quote:
Originally Posted by patrickt View Post
... Of course, you could of always just bolted on a torque strap....
I think that's what the ERA bolt limiter is that he referred to. Still, a pretty good project.
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Old 03-24-2015, 05:25 PM
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Nice job John, reminds me of making molds in junior high school. They should work well. Dennis Olthoff is the only other person that I am aware of who makes polyurethane motor mounts. This is definitely a thread to hold on to.
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Old 03-24-2015, 06:09 PM
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I don't think the Oltoff mounts are the right part for an ERA. Not all FE mounts are the same.

The ERA limit bolt certainly helps, but I suspect the bigger problem is the Right mount compresses during hard accel and allows the Left header to come up. During engine braking you would have the opposite problem. I have seen contact marks on enough cars to convince me it is a problem, and I couldn't resolve mine completely.

I did put the ERA limit bolt in the LH and RH mounts.

The urethane sticks like crazy. The OEM mounts are essentially made the same way, but the "rubber" is much softer.

Rodney - I would consider doing a run of mounts. 10 pairs would likely be enough to make this a cost effective project. That would be enough to justify a more permanent mold that could sit on the shelf and be pulled out as needed.

John
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