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MotoSook MotoSook is offline
Somewhere in the Midwest
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Join Date: Oct 2001
Location: In the barn!
Posts: 12,495
Originally posted by magic930
When I researched this subject for my rebuild I concluded that the ni resist ring is a safety measure needed on engines that are intended to produce over 500HP or over 1 bar of boost for extended periods. I thought that the purpose was not to prevent "lifting" but to prevent the head from moving sideways, or pressure blowing out sideways. The head studs had better prevent any lifting or you would have other problems really fast.
I understand how the niresist rings work. As I stated above, the expansion rates of the material is what concerns me. Adding a tortuous path to prevent compression leak does not change how the studs will react under tension, as a result, it won't prevent head lifting. (magic930...we are talking about running over 1+ bar of boost so lifting is a concern)

The BIG issue is that all these "fixes" appear to be band-aids. So I wanted some field data!

Henry, we'll talk. I'll give you a call.

Last edited by MotoSook; 03-05-2005 at 09:13 AM..
Old 03-05-2005, 08:04 AM
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