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Join Date: Apr 2001
Location: Vancouver, BC, Canada
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Best Valve guide material..SI...others?

My machinist recommends SI valve guides (see SI Web Site ) for my 993. I know Steve W. has his own (or are they?) and others seem to have other formulations etc.

I know I won't get an answer but what is the best guide for street/some track use / (yes, I know to throw out the OEM guides). Its very confusing with lots of "trust me" type statements without any quantitative information (its the engineer in me I guess...)

Cheers,

Mike
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Mike
97 993TT Arena Red - "Scarlett"
Old 01-14-2006, 03:30 PM
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The old reliable standby material is phosphor bronze which SI does carry.

There are some newer alloys that are touted by various shops.

I went w/ the phosphor bronze when I did my 993 motor
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Bill Verburg
'76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone)
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Old 01-15-2006, 05:11 PM
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I had heard about some sort of Aluminum-bronze alloy...sounded pretty hokey to me.
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97 993TT Arena Red - "Scarlett"
Old 01-15-2006, 06:54 PM
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The phosphor bronze were developed for the 935s and have been successfully used on every model since.

When the newer alloys have as long and good a record they will deserve the same consideration. But I didn't want to experiment
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Bill Verburg
'76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone)
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Old 01-16-2006, 07:14 AM
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Old 01-16-2006, 07:14 AM
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