Well if long stroke is the reason, then how come an 1100 race spridget can
pull 8200 rpm in top gear? This is fact.
While it is true that long stroke makes things more difficult, the reason
may not
be what you think.
I'll say again that the key to high rpm is the engines ability to suck
fuel/air mixture
into the combustion chamber. It so happens that with long stroke, you are
forced
to use smaller valves than you would otherwise choose to (long stroke means
smaller
bore for the same capacity; smaller bore means less cross sectional area for
the valves)
Even so, a long stroker like the 1098cc engine can still be made to pull
high relatively
high RPM by a combination of cam, porting and big (as possible) valves. In
lower gears
it would happily pull 9 or 10,000 if allowed to (just before the crank
breaks :-)
Mike
----------------------------------------------------------------------------
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Mike Gigante mikeg@vicnet.net.au
Watsons Creek Vineyard http://www.vicnet.net.au/~mikeg
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-----Original Message-----
From: Bob MGT <BobMGT@aol.com>
To: mgs@autox.team.net <mgs@autox.team.net>
Date: Friday, January 02, 1998 2:56 PM
Subject: Re: MGA superiority, long strokes, RBB stuff, Fergussons,
Venoliaslugs
>There's all this talk about how long stroke engines won't rev. Does a long
>stroke engine design have any advantages? Better torque maybe?
>
>Bob Donahue (Still stuck in the '50s)
>EMAIL - BOBMGT@AOL.COM
>52 MGTD - under DIY restoration NEMGTR #11470
>71 MGB - AMGBA #96-12029, NAMGBR #7-3336
>
|