[Fot] TR4 crank

[Tony Drews]

As I understand it, the stock crank will live pretty much forever if 
you shift at 5,000 RPM.  If well prepared (good radius between 
bearing surfaces and the rest of the crank, possibly nitrided as 
well), it will live a number of seasons shifting at 5,500 RPM.  When 
you start running it to 6,000 RPM, that's when the longevity drops 
pretty quickly - a season or two is about it before the #4 journal 
section goes.  Some last longer than others.  Sometimes when it goes 
it doesn't take out much else, sometimes it kills the block and a rod or two.

Tony Drews

At 06:23 PM 5/2/2012, westerneagleracing at att.net wrote:
>FOT,
>I am having the engine in my TR4A race car rebuilt.  Are there any
>alternatives
>to a billet crank?  We are looking for about 150hp (not a super
>powerful
>170-190).
>Thanks.
>Western Eagle Racing/Ron Jacobs
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