Pistons specs question for 340 build

pishta said

like I stated before, seen it both ways but the DSS website says the dish is -16..Seems most state a dish as a negative cc
"...-16cc Small Block Mopar Dish Top..."

Probe states a 360 dished is -16
Ross piston states 340 Forged Dome volume is +5.5 cc

Chrysler Dodge Mopar 340 Piston Sets

Click to expand...

Ross has it right. Any amount of piston head that REMOVES volume from the overall chamber is stated as a NEGATIVE NUMBER. It will not come out correctly when calculated for compression otherwise. Don't take my word for it, DO THE MATH!!!!! Use a positive number there instead and you'll quickly see IT AIN'T RIGHT! lol