Keith
Ain't so simple bud. Depends on the RPM range your working with. If I'm
building a motor for my truck I want a long stroke to torque it around. If
this motor is going in my Hondaliner I want the big bore / short stroke.
Short stroke equals less piston speed. Big bore means more surface area for
the expanding gasses to push on. And when using the same heads the big bore
will unshroud the valves which will generally promote better flow. Combined
they will build more HP in the upper RPM range. Believe you will find the
same basic results whether you are running a 496 or a 304 inch motor.
JB, #79 ?/GCC
----- Original Message -----
From: "Keith Turk" <kturk@ala.net>
To: <land-speed@autox.team.net>
Sent: Monday, July 12, 2004 11:53 PM
Subject: Bore stroke combinations
> David and I were chatting on the phone bout this idea... and now I've got
a
> much better idea about what he was talking about...
>
> He's actually done this test... the results of which will be published at
a
> later date... his real request was why do you think one is better then the
> other... . he is looking for your personal perspectives... he is
researching
> it to find truth.. and only the dyno and corrected conditions can give him
> that... empirical data...
>
> The reason he's limiting it to a particular Cam and head combination is so
> neither can be optimized for a purpose and to try and limit the test to
Bore
> and stroke only.... it's obvious that a combination can be optimized one
way
> or the other... and either combination can be set up as both a high rev
motor
> or a torque motor....
>
> My understanding of his goal is to decide if there is any merit what so
ever
> in a particular bore and stoke over another combination.... without
> artificially pimping one set up over the other...propping it up so to
speak
> with optimized cam's for a given combination...
>
> This is a PURE bore and stoke test.
>
> Now what say you?
>
> Keith
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