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[Fot] TR4 Valve spring - pressure, assembled height, suppliers

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Subject: [Fot] TR4 Valve spring - pressure, assembled height, suppliers
From: "Tim Murphy" <timmurph@fastbytes.com>
Date: Tue, 8 May 2012 13:40:23 -0500
Cc: ryan.murphy@fdlco.wi.gov
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The machinist doing the work on our cylinder head tells me that we only have
about 70 pounds of pressure on the seats.  He thinks this is pretty low, in
his experience with other engines.  He also asked if I had the assembled
height of the springs, i.e. how much compression when assembled to the head.
He usually has this spec and shims the spring to obtain the specified
height.  Lastly, the alloy retainers are pretty beat up and the origin of
the springs are unknown and he thinks they look questionable.  Who are the
suppliers of valve springs, retainers, keepers and spring seat hardened
washers for racing purposes?

 

Thanks,

 

Tim and Ryan

1961 TR4 #317
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