Quote:
Originally Posted by blykins
Horsepower/torque is one of the biggest factors there.
Most of your Mountain Motor and some of your Pro Stock engines use extremely long strokes.....like 5.5-5.75". They will zing to 8000-9000 as quick as you can get on the loud pedal.
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Long stroke Pro Stock engines? I don't think anyone uses a bore smaller than 4.70" with stroke in the 3.50"-3.60" range. I think they are also using an 8.90" deck height to keep the compression height to a minimum while utilizing a shorter, lighter rod and to keep the push rods shorter. Regarding rods, I believe they are running Honda rods. They're basically BB's built to ultra-light SB specs except for the bore... so they'll rev...