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Re: TR6 valve seats

To: oliver <sumton@sbcglobal.net>, Triumphs <Triumphs@autox.team.net>,
Subject: Re: TR6 valve seats
From: Michael Porter <portermd@zianet.com>
Date: Mon, 05 Dec 2005 05:22:34 -0700
oliver wrote:

>i'm not sure about your diagnosis, but while the head is out, you might want
>to shave it a bit and port it as well . . . .
>
>the 74 had lowered compression for emissions.
>  
>
Uh, only in the US.  If you notice, Paul's car was an export to Africa 
(because it's PI-equipped) and the US rules didn't apply.  In fact, 
significantly altering the compression ratio is likely to cause further 
problems in recalibrating the fuel injection metering unit (not to say 
that it can't be done--it's just an additional potential problem).  The 
metering units were pretty much set to operate with the compression 
ratio of the PI engine.  A big shave would also likely require 
installation of tubular pushrods so their length can be adjusted.


Cheers.

-- 
Michael D. Porter
Roswell, NM

Never let anyone drive you crazy when you know it's within walking distance....


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