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Registered
Join Date: Dec 2001
Location: Off grid in Eastern ONtario
Posts: 234
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Unfortunately I don't have any stock springs to measure, I have been relying on info from various sources.
I do know that the springs have been in the engine for about 20 years and many track miles, and that the rest pressure is about 130. I now suspect that the increased forces and hence the torque required to drive the cam might explain why the IM aluminum gear have up. The failure of that gear is the reason I tore down the engine .
It would be nice to know the stock seat force, likely there is some discrepancy between the checking method and the installed height.
Need to think about this a bit but it sounds like the springs (and upper and lower retainers) are needed.
Dang
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