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the subject of a longer rod is one that most engine builders with a dyno - will tell you its what they see - in the way a longer rodded motor makes torque -- ( HP is a by product of torque ) and the time the motor takes to rev up under max load that is the key to it all -- just say the exact combo just the rod length is diff you gain 2 things a lighted piston - compression hight is lifted - and shorter as well reducing - ( drag ) - dwell time at both the top of the cylinder and the bottom - as has been said - the dwell time difference is a big part of a better combustion burn completeness -- engine timing and fuel curve as well as exhaust tuning is very important to get the max - most people dont get 25 percent of what it has to offer - the other thing is the rod swept movement at both the top as well as the bottom of the crank stroke -- it changes the rod / stroke - ratio number -- and this is the smoking mirror part to some -- but not for a hobby tuner / builder to bother with - it works yes - but remember in a race motor the lighter the rotating and reciprocating assemblies are --- that becomes power to the wheels and not soaked up buy the motor itself to rotate - SBF motors are designed light chevys are not as -- you will have to work at it to get their -- LW pistons -LW rist pins - lw crankshaft like 42 pounds is still not out of the question money wise and alike -- jz
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