Quote:
Originally Posted by Tim Ayers
Interesting, Pete. So I guess this may be an obvious question, but I'd assume you don't need to use a insert if the entire guide is made from bronze.
Do you knurl the valve opening/hole in the guide or just run it tight?
I'm also assuming bronze guide would wear better than a cast iron stock-type.
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No inserts with solid bronze guides.
No knurling. Fit at .002.
A set of bronze guides will run a whole season of races. (10 full programs, including hot laps, timing in, dash, heat and 30 lap main)
As a side note, cast iron guides have very good wear properties if chrome stem valves are used. Very poor heat dissipating properties though.