Stuart,
I've been told the same thing about hardened seats. The idea is to improve
heat transfer from the red hot exhaust valve to the head which acts as a
heat sink. The hardened seat serves that purpose. Intake valves run much
cooler and so hardened seats are not really necessary. As far as the
argument about unleaded gas I ran my 250 as a daily driver for four years
(about 60,000 miles) on Amoco unleaded premium almost exclusively with no
issues.
Greg Dito
CD6250L
----- Original Message -----
From: "Richard Good" <goodparts@desupernet.net>
To: <StuBeatty@aol.com>; <6pack@autox.team.net>
Sent: Monday, October 20, 2003 11:16 PM
Subject: Re: New Valves
> Stuart,
>
.... I recommend Stellite exhaust valves with hard seats and the stock
intake valves. I
> don't think hard seats are necessary on the intakes.
>
> Richard Good
> Good Parts
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