Piston cc's info

[dwg86]

http://www.fourwheeler.com/techarticles ... atios.html

This article shows the sealed power piston part number H802CP having a 17.5cc piston dish. With the ring land volume 1.3cc, the total being 18.8cc. This piston also has the highest pin hight 1.592, for a better quench. I plan on using these pistons in my stroker. I have opened up and polished my combustion chambers to 61cc.

[gradon]

My bro has got a line on those in h802cp20 flavor. I've seen two sites that list the dish as being 15.1(dino's site) and as being 15.8(I just saw this a couple days ago), but definitely not the 17.5cc you've found. Are you sure it's not the 677P, that has a dish of 17.5cc? Anyhow I would love to have a hyperT, coated skirt piston with a bigger dish so I can keep the CRs down after decking.

[dwg86]

No I'm not sure, just what the article says. They added 1.3cc for the ring land grove to the 17.5cc they said the dish was in the piston. I was hoping someone has a set they can cc. Anyone???

[dwg86]

Looking at the article again, they are also listing the 677p as 17.5 cc's.

[gradon]

On my build, .043 HG, deck .030", the difference b/t 15.1cc and 17.5cc is an scr of 10.25:1 and 10.0:1, so I'm hoping the numbers that article listed hold true.