Many on this side of the pond have converted to hardened valve seats. Does
this modification along with stellite valves, eliminate valve recession
completely? You never hear about valve recession on modern cars, which I
presume come with hardened seats and valves.
Bob Donahue (Still stuck in the '50s)
Email - bobmgtd@insightbb.com
52 MGTD - NEMGTR #11470
71 MGB - NAMGBR #7-3336
----- Original Message -----
From: "Telewest (PH)" <paul.hunt1@blueyonder.co.uk>
To: "Mike Razor" <mrazor@mis.net>; <mgs@autox.team.net>; "Barrie Robinson"
<barrier@bconnex.net>
Sent: Sunday, April 20, 2003 2:42 PM
Subject: Re: Fuel Additive
> With the then impending demise of leaded petrol from the UK in 1999 the
> Federation of British Historic Vehicle Clubs organised a set of tests by
the
> Motor Industry Research Institute at which new BL A-series engines were
> tested both without and with various additives. The A-series was known to
> be particular susceptible and new engines were used as anything else
> wouldn't have been a level playing field. The engines were run at very
high
> speeds and heavy loads for long periods, and recession certainly happened
on
> untreated and some treated engines, the additives for which were deemed to
> have failed. At the time only four additives were deemed to have passed
> giving acceptable protection against recession. Of course, the recession
> rate on engines used less harshly, and with many thousands of miles
running
> on leaded, will be much less, quite possibly non-existent.
>
> ----- Original Message -----
> From: "Barrie Robinson" <barrier@bconnex.net>
> To: "Telewest (PH)" <paul.hunt1@blueyonder.co.uk>; "Mike Razor"
> <mrazor@mis.net>; <mgs@autox.team.net>
> Sent: Friday, April 18, 2003 6:17 PM
> Subject: Re: Fuel Additive
>
>
> > At the risk of repeating myself for the "nth" time. Canada has had
> > unleaded fuel for a coon's age and I have heard no horror stories about
> > "valve seat recession" on Brit cars.
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