years ago, I used custom made "johns racing pistons" can;t remember where
I got them, but they were not to outrageous at the time. I did get a
little out of hand, and went with 11 to 1 compression ratio with large relieves
in the pistons for valve clearance. Wow what a difference in the performance
well worth the effort, an Alpine that WILL get out of its own way
I might of gotten them from tiger tom down south, I will look around to see
if I can figure out where I got them
Paul Appleton in RI
1966 alpine
In a message dated 2/12/2015 2:47:18 P.M. Eastern Standard Time,
alpines@autox.team.net writes:
Hi,A few years back, about five, I rebuilt my Sunbeam Alpine 1725cc
engine. I
had to bore it out to .040 over and I used some pistons purchased from
Victoria British. They did not look like any other pistons that I have ever
seen, and I have see quite a few, as they had a slot down the camshaft
side
rather then the usual four holes up near the oil ring groove. I expected a
bit
of oil use after the overhaul, but it kept getting worse and worse, not
better, to the point that I was laying down a blue cloud as I drove; it
sure
kept people from following to close! Last fall I pulled the engine apart
and
discovered that all of the pistons had broken skirts and the oil rings did
not
appear to expand as I had expected (photo at
:http://www.madbrits.org/DS.gif)!
Further the oil pressure pegged and ruined the pressure gauge! So the
questions are: Where do I find better quality .040 pistons? and does anyone
have a working oil pressure relief valve which will fit a 1725 cc Alpine
engine (I have not checked it out yet, perhaps a cleaning is all I need)?
~~~~~~~~~~~~~~~~~
73 de Dave KB9CSW
~ ~ ~ ~ ~ ~ ~ ~ ~
David Wm Spearing
kb9csw@juno.com
~~~~~~~~~~~~~~~~~
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