datzenmike wrote:As a rule fully floating pins free up a small amount of power.
every bit helps and its one of the reasons im doing this build. another is i hate reaching for third on every hill. i would rather be watching a pyrometer than hanging out in the slow lane with the 4ways on
the marine and industrial Chrysler motors that i have are of better quality than the Plymouth and Desotos. however chrysler could have used a couple more mains. there are 5 main bearings supporting a 31in long 90lb crank.
i went to buy a tcase for parts. I showed up in the m37 and the guy says "i have one of those for sale its beside the house". i walked around the corner and there was a rolling chassis with a new set of tires. the guy said "$500 and there are a bunch of parts inside the house" so i laid out some cash. i was looking at getting new tires and i couldn't pass on the deal. it took me four very heavy trips to move everything home
while spelunking in the heap of parts i noticed that everything I needed to rebuild the truck was there. boxes and boxes of nos, parts, bearings, seals, bushings and fasteners. every part for the motor is machined and coated in Cosmoline. i could walk into the shop tomorrow and start assembling. i could even have a fresh stock 251 rebuild hanging on the crane for Christmas.
but being ahead in the game at the start I figured i would put a little extra into the build t
if that 2% more power can be translated into specific fuel consumption i will take the .28 of a mile per gallon for around $50 a piston shipped.datzenmike wrote:As to exotic coatings the heat loss saved may add 2-5% more power.
pretty much. just a self locking adjustable tappet, cap, keepers spring and valve.datzenmike wrote:I imagine there is provision for clearance adjustment and valve lifter