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Original Message
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| RE: Iron/steel shafts reduce the moment arm. |
| By John - 03/27/2002 5:23:27 PM; IP 142.177.97.134 |
| Well, actually Aluminum End Support Stands, like the type FPP sells, do EXACTLY the same thing as merely upgrading the shaft to a stronger (thicker wall) unit. This is because all the end stands do is stiffen the shaft along the area the rocker rides on. But there is still considerable moment-arm force as only the existing end stand bolt is utilized. Now, some end support stands, like the ones Dove,...or is it Total Performance (Can't remember)sell, do a lot more because they utilize the last head bolt location for additional clamping to the head. This essentially puts the rocker shaft in a double shear position which makes it incredibly stronger than merely stiffening the shaft through the FPP type of end stands or using a stronger shaft like the type Harland Sharpe sells. Incidentally, concerning stronger rocker shafts, it should be remembered that in this type of application, a thick walled tube is almost as strong as a solid tube. The difference is almost negligable. It is a stronger steel that helps the most...BUT...harder also may mean more brittle depending on the process and material, and that's not good. I use FPP stands with the Harland Sharpe shafts, BUT if I had to do it again, I would buy a set of the end support stands that use both a head bolt and a rocker shaft stand bolt and keep the OEM Ford shaft. |
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This thread, so far...
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