340 Vs 360

273 said
For one longer stroke doesn't make more torque displacement does a 0.40" 400 (408 ) RB and a 408 LA has the same torque producing ability because while the crank will multiply the cylinder pressure the RB has a bigger piston (more cylinder pressure) equaling out the the effect.

Secondly its also wrong that an equally build 340/360 that the 360 will kick the 340 or 318 for that matter in the nads because of torque, maybe cause of bad setup but not because of torque because a 400hp engine no matter if its a 2l 318 340 360 440 540 all can accomplish the same amout of work in the same amount of time thats the definition of horsepower= move 33000lb 1 foot in 1 minute. Or cars weight/quarter mile/E.T.

RustyRatRod said
I passed advanced high school English with high Bs and As, but your post makes zero sense.

Yup. X2

Given equal linear force from the piston, a longer stroke will produce a greater force when measured in foot pounds. Reason can be found in the simplest machine, the lever. At 3.31", the 340 has a mechanical advantage ratio of about .26 to one where the 360 at 3.58" has a ratio of about .30 to one. 1000 pounds of force at the crankpin of the 340 will yield 260 ft/lb. of torque. The same 1000 pounds will result in 300 ft/lb. of torque with the 360.

The .040 larger bore results in less than a 2% increase in piston head area. Undeniably larger/better, but I would have a hard time believing that would offset the torque gains found in the crank stroke. FWIW, small block ford and chev also have 4" bores. Stroke them to the Mopar specs and there would be no difference in their mathematical ability to generate torque.

Which brings you to the real difference. Horsepower will be found in the heads! That is a whole other discussion and it has been gone over many times.

Enough of my soapbox for today. 340, 360, or even the 318! Performance pieces interchange, but there is much more to building an engine. Build for your needs and budget.