340ci vs 360ci engine

70aarcuda said
dont know how bushed rods makes an engine rev faster...weight of the pistons, rods and cranks usually determines how fast an engine can rev...called physics...

360 pistons are lighter then 340 in stock form...by over 100 gram...x 8 is 800 grams...which is almost 2 pounds...they use the same rods...and the 360 crank is lighter since it is cast..and balanced for a liter pistons...

in fact 360 pistons will always be lighter then a 340 due to the compression height of the pistons with the 360 having a longer stroke and both engines using the same deck height blocks.

take a 5 pound hammer and swing it...and take a 2 pound hammer and swing it....which one swings faster???? 2 pounds.....physics...

Yeah but the aftermarket 340 pistons and 360 are lighter than stock. Yes the 360 pistons-same brand, type--will be a bit lighter but that is due to a shorter skirt. Shorter skirts pistons rock more in the bores and that effects ring sealing. When everything is spanking brand new its no big deal, everything seals perfect in both motors. As they age it starts showing up.

High rpm's increase the wear. Longer strokes increases the piston speeds.

At 50,000 miles which motor has less wear, the 340 and the pistons will be rocking less in its bores.

360's lasted so long in stock forms cause they were not to be revved to 6,000+ rpm like the 340's were. Many maybe hardly seen 5,000 rpm's

Yeah a good rebuilt 360 will last a very long time. Today 3.5 stroke isn't much. Parts are machined better, pistons are made better. The weight has come down also.

360's are cheaper to rebuild and find and do make more sense to build up I will admit. I'm dumb, I built a 340, lol