Quote:
Originally posted by GTStang
Here is the truth if you have two physically identical blocks, heads and intakes etc.., The only difference is one uses more bore to get 305 CU and one use more stroke to get 305CU. The engine with more bore will make more torque because piston surface area is more deciding factor on torque.
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It will make more PEAK torque, but the more stroke the more power you have at low RPMs.
I plugged everything into my desktop dyno, everything the EXACT same except bore and stroke. The one was factory bore and stroke of a 305-3.735X3.48. The other I made 4'' bore and 3.034'' stroke. The factory 305 make 1 more HP and 2 more ft/lbs at 2K RPM. But the 4'' bore made 6 more peak HP and 2 more peak ft/lbs. Low end power is what a longer stroke is for, high end goes to shorter stroke engines.