[Mgs] Unleaded fuel and Cylinder Head

[Stephen West-fisher]

The consensus on the Land-Rover list (if there can be such a thing) is that
it depends upon how hard you run the engine. On an old Series Land-Rover you
are running around 4000-4500 rpm at 60-65 mph (getting up there for an old
farm implement) and folks that do that on a regular basis appear to have
more of a problem with unleaded fuel. Some people don't seem to have any
problems while others do. When my engine was redone I did have the seats put
in but there was no abnormal wear upon teardown.

--
Stephen West-Fisher
Coastal Data Systems
727.599.4271
http://www.coastaldatasystems.com/

-----Original Message-----
From: mgs-bounces at autox.team.net [mailto:mgs-bounces at autox.team.net] On
Behalf Of Denise Thorpe
Sent: Sunday, February 22, 2009 6:06 PM
To: mgs at autox.team.net
Subject: Re: [Mgs] Unleaded fuel and Cylinder Head

BlankHi Tom,

My '67 MGB has 330K miles on it and I've never made any modifications to the
head for unleaded fuel.  I bought the car in '79 with 100K miles on it and
have rebuilt 3 engines for it, the first when I first got the car.  No
removed
head has had excessive valve seat wear and I don't use any additives.  Most
of
these miles were in California.  I know there are listers out there who have
had valve problems with unleaded gas but I just haven't had that experience.
Maybe it's because my car has the low-compression engine or the fact that I
always use a 160 degree thermostat.  Or maybe because most of those miles
were
with the top down.