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Re: TR3 engine machine work

To: triumphs@autox.team.net
Subject: Re: TR3 engine machine work
From: Bschwartz@encad.com (Barry Schwartz)
Date: Thu, 14 Nov 1996 07:33:21 -0800
> When an engine is "milled" is the material removed from the head, the
> block or both?  Do you try to take a minimum amount of material so as to
> true the piece or is there some optimum amount?  What is that amount?
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
With most of these questions it depends on what your goals are for this
rebuild, a nice restored stock runner, or more performance.  Most of the
time, unless the block is not true or flat, the head only is milled, and if
not for performance, only the amount required to true the head (usually
around ten thousands or less ( .010 ) will do it).  If your increasing the
compression for more performance,  than more is required-the 'optimum'
amount depends on what compression ratio you want to achieve-
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>       Can I "port" the head myself? (In the basement, with a Dremmel tool and
> significantly impaired on Michelobe beer) or is that the type work best
> left to the machine shop?
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Yes, but you had better know what your doing here, I've done many myself but
used the competion manuals as a guide as to what to do. (tried and tested
methods).  Just simply making the ports bigger is not always better, and in
some cases can actually reduce flow.  It's your call, and it's a messy job,
but the benefits even on a street machine are worth it.
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>       Does anyone have experience with a product called Red Glyptal?
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Yes
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>  Is it worth the effort?
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What are you using it for?  It's my under standing that this stuff was
originally intended for painting the unmachined area of an engine block,
underneath the intake manifold on 'V' type engines to improve oil dranage.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>       Other than getting new valve seat installed in the head, is there any
>other obvious machine shop work I'm missing at this point?
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In my opinion while you have every thing apart and at the machine shop
(unless already done) replace all the exhaust valve seats and the exhaust
valves with no-lead hardned valves, replace the valve springs and replace
the valve guides with bronze ones-other than that, no :-)

Barry Schwartz
Bschwartz@encad.com (work)
Bschwart@pacbell.net (home)
(San Diego)
70' Spitfire (under-going major surgery) ,  72'-V6 Spitfire (daily driver)
70'GT6+    


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