Thread: 525 combo

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525 is 060 and 4.500 and i did build one some time ago for a air boat .if you use a 6.700 rod with a 4.500 crank 010 down would be a CH of 1.240 and if you used a 6.800 rod it would be 1.140 if you use a 6.535 rod would be 1.405 all piston CH worked off piston down in hole 010 so a deck of 10.190 . as for what rod that up to you as the builder .but je makes pistons that start at 4.280 bore and you can get something up to 4.375 bore if you want a bore that big. then deck the block to where you want it to be. they have a shelf piston that get you very close with the 6.535 rod and there is allways custom pistons. there has been many post on here about how long the rods needs to be??? there is many thing that come in to play here more then just the rod .for heavy load i do not care for any piston CH under 1.230