Re: [tuner23] passed CA smog

["Geoff Hemsley" <ghemsley@uswest.net>]

> Thanks Geoff. I just cannot develop the faith in stainless that I have
> in NiMoNic alloys. And an oversize exhaust valve and tract seems to be
> the ticket for good street performance!

I hear you Bill.  Personally I wouldn't downgrade from the stock Inconel to
any lesser material for the exhaust valve, especially an oversize valve with
its poorer heat transfer geometric ratio.  The reason I brought up Ferrea is
that, in exhaust valves for more popular engines and semi-finished
competition valves, they offer several ascending grades of material they
consider to be well above Inconel in temperature performance.  Perhaps if
they had enough inquiries, they might offer 2.3 exhaust valves in these
materials as well.  As it is, Ferrea have a wealth of options for anyone
willing to adapt one of their blanks or Chevy smallblock valves to fit the
2.3.  I believe one approach would be shortening the stem by the necessary
amount, machining a keeper groove in the right place, and adding a lash cap
or "hard tip", although I don't know if the lash caps or hard tips would be
compatible with the stock 2.3 rockers.  If not, there's probably a solution
for that too.

Geoff.


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