Posted By: Cab_Burge
Stroker pistons, AKA "hockey pucks" - 06/09/11 06:38 AM
I'm in the middle of assembling my next low deck stroker motor, 505 C.I.bracket motor. It is a 400 block I bought several years ago from AndyF 
It will have a 4.25 stroke Ohio Crankshaft CO. crank, bore is 4.350, 6.700 CAT forged steel H beam rods with BB chevy sizes on both ends and a set of custom Diamond pistons that should end up around 12.5 to 1 comp. ratio depending on which cylinder heads I use and the CC of the chambers. I thought I would post the pictures and some information on them, this is the first high compression bracket motor I've built from scratch since I moved to Oregon back in 2005. The pistons are not a max effort class pistons, but there not a shelf piston either 
They weigh 722.25 grams with the rings,spacers, retainers and wrist pins. The pins are the standard .990 pins as far as I know, not the real good stuff like the ultra lightweight tool steel short rascals that are avialble from Diamond, maybe next time 
The piston in the rear is a 1970 TRW 383 +.060 Magnum stock replacement piston. BTW, I remember why I don't like dual spiral locks on stroker pistons for low decks using long rods 
Enjoy 
It will have a 4.25 stroke Ohio Crankshaft CO. crank, bore is 4.350, 6.700 CAT forged steel H beam rods with BB chevy sizes on both ends and a set of custom Diamond pistons that should end up around 12.5 to 1 comp. ratio depending on which cylinder heads I use and the CC of the chambers. I thought I would post the pictures and some information on them, this is the first high compression bracket motor I've built from scratch since I moved to Oregon back in 2005. The pistons are not a max effort class pistons, but there not a shelf piston either They weigh 722.25 grams with the rings,spacers, retainers and wrist pins. The pins are the standard .990 pins as far as I know, not the real good stuff like the ultra lightweight tool steel short rascals that are avialble from Diamond, maybe next time The piston in the rear is a 1970 TRW 383 +.060 Magnum stock replacement piston. BTW, I remember why I don't like dual spiral locks on stroker pistons for low decks using long rods Enjoy
This is the first time I'm going to be using these smaller rings, I hope there is some power as well as and good sealing with them 
That was doing a quick check to see what it ended up at, I will check all 8 tomorrow 
I wasn't planning on running a vacume pump on this motor due to being told that these rings are the stock ring sizes used in the new car motors like the LS1, 3rd. gen Hemi and the modular Ford V8 
It depends on which heads, intake, carb and the dyno 
good luck with the build . the pistons look nice. I will be ordering a light weight set soon.
