Originally Posted by cudaman1969
Originally Posted by CMcAllister
Originally Posted by cudaman1969
Well hell let’s take all those stroker cranks, small block and big block, and throw them in the trash since the BORE makes so much power. I guess the big 3, Cat, Cummins, Offy-Drake, ships, freight trains, any and all got it all wrong.


None of those run 7k. Or even half that normally.

They don’t have too rev to make the power to push those heavy loads. One point the 383 and 400, both have same crank but 400 much bigger bore. What’s the difference in HORSE POWER from each? What maybe 5, Negligible


At the low RPM the factory rated those engines it didn't really matter that much. Besides, the factory ratings were rarely correct. The numbers were usually fudged for marketing reasons. Any race engine builder will tell you that bore size makes power in a wedge headed engine. People have known that for at least the last 50 years if not longer. The big problem with making power that way is finding a big bore block. In the old days they didn't exist. These days they exist but they cost a lot so the average racer doesn't mess around with big bore combinations. A 4.500 bore is probably the largest bore size that the average bracket racer will ever get their hands on, especially a Mopar guy. Chevy guys and some Ford racers have the option of larger bores.

Last edited by AndyF; 02/23/21 06:54 PM.