[6pack] unleaded fuel

[Robert Lang]

On Fri, 9 May 2008, John VanNorman wrote:

> I just noticed this thread on the 6-Pack website.  I'll be honest, I
> never knew this:
>
> http://www.6-pack.org/modules.php?name=Forums&file=viewtopic&p=37566#37566

Me niether.

That's because I don't believe that it's accurate that Triumph "switched" 
to hardened valve seats.

As far as running unleaded, my car had over 90k miles of unleaded 
REGULAR. No valve recession 'till my distributor got flakey and I had 
ignition on run-down... burned a couple of valves (but it sounded kool!). 
I'm at 9.5:1 now and run mid-grade fuel (because I run a lot of ignition 
advance). No pinking with 91 octane (R+M)/2 method.

I have heads from all years and I have yet to find a hardened seat in a 
factory head unless it was installed after the car was in service.

> John V.
> 1974 1/2 TR6

regards,
rml
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