What exactly do these 2 terms mean, Im looking at pistons for my stroker, I ordered a Eagle stroker crank for 1 piece seal blocks and rods, and i found the 18cc dish top keith blacks giving me 8.7:1 with my 76cc heads(thats still pump gas right?)
I can order them with a floating pin or pressed, thats what I dont get.
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1987 Chevrolet Caprice classic Brougham. 142,000 on the 305 and still chugging
Pressed means the pins are pressed into the small end of the rod. Floating means the pins are retained in the pistons with snap rings and the rod is bushed so that the pin can move around in it. Of course, this means the rods have to be prepared for the floating pins.
Stock pistons are pressed.
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1988 9C1 - Modified LM1 @ 275HP/350TQ - TH700R4 - 3.08 8.5" Disc Rear - see it at http://www.silicon212.org/9c1!
There's a lot of perceived pros and cons to both conventions. Floating pins require more parts, more machining. They can also promote piston skirt slap since you have introduced another axis of motion into the mix. Some racers use coatings on the piston skirts to combat it.
Unless this is a race-only engine, you'll be gaining little by going to floating wrist pins.
