In a message dated 8/28/2007 10:57:37 A.M. Pacific Daylight Time,
d_dibiase@yahoo.com writes:
Good to know, Bill, since my '65 has a 3-main engine sitting in it that will
be coming out as soon as I wrap up this '76 engine deal....
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So many of these were dumped in the old days with people wanting to go to
the supposedly superior 5 main. In fact the 3 main puts out a little more power
(less friction), spins more easily and is really quite durable even in
endurance racing. In fact it will rev to levels that are not safe for an
unmodified
5 main (that is, over 6500, assuming fitment of suitable valve springs).
Yes, the crank will flex a little more and will have a shorter service life
as a result, but if you aren't racing and running to 8K, don't worry about it.
I have run several over the years in the race cars and so can give my
personal recommendation. I continue to run one in my street MGA coupe.
Bill Spohn
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