Okay lets start somewhere and move on from there... First off I want to know
how we are going to supply Fuel to this monster...( anything over a C
Motor ) is it going to be naturally aspirated, Nitrous, or is it going to
be super charged... What is the design intent of the engine? LSR, Street,
Drag racing? Do I want bottom end Torque or do I want high RPM HP?
My understanding is somewhat limited but here's my take...
A longer stroke gives you a better bottom end and mid range torque ( good
for Drag racing? )
A shorter stroke keeps air flowing at higher RPM ranges and and reduces the
overall wieght of components... better High RPM hp?
Okay that's as far out on a limb as I'm climbing for the moment.
Keith
> Let's assume you've got two big-block Chevys, both with 11.0:1, both with
> the same solid-roller cam (253/260 at 0.050 on a 111), and both with the
> same heads, intake, carb, oil pan, and headers. Both engines are 489ci.
> However, one uses a bore and stroke of 4.55x3.766, and the other is
> 4.28x4.250. The rod-ratios are similar: the long-stroke is 1.53:1
> (6.535-inch rods), and the short-stroke is 1.63:1 (6.135-inch rods).
>
> What's the difference in the power curves and the required tuneup of these
> two engines and why?
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