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Grady Clay Grady Clay is offline
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Join Date: Dec 2003
Location: Arapahoe County, Colorado, USA
Posts: 9,032
I find nothing wrong with the proper Titanium alloy rods for racing
except they are very expensive.
I donít know who makes the best Ti race rods for a 66 mm crank.

I used the 2.2 (non-S) rods that we reworked by lightening, polishing,
and shot peen.
I used OE Porsche bolts and nuts.
Everything passed Magnaflux, Zyglow, and X-ray.
For three engines I had over 100 rods.
Out of that number we probably didnít use two as ďsuspicious.Ē
Never found an actual defective part.

These engines ran 8300 max all the time, 8800 intentionally on occasion,
and probably saw 9000 unintentionally.
Rebuilt every 25 track hours.
Never had a failure or found a potential problem on rebuild.

Here is a 2.0 steel rod (66 mm) and a 935 Ti rod (70.4 mm) for comparison. I
canít find a 2.2 rod here at home.
It would be useful for someone to post a picture of
a 2.0 rod and 2.2 rod side-by-side on some graph paper.

There are some good comparisons of the various Porsche
rods on p. 65 of Bruce Andersonís 2nd Edition.
Everyone should have this book in addition to Wayneís.

Old 07-20-2004, 09:41 AM
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