another Piston ID question

[pishta]

Anyone recognize these? they are 318 pop-ups .030 over, have L and R on the tops, 2 equal valve reliefs, have 2 F's on the pin side, and inside they say 147 and "HY-DUTY" inside as well as an "H" with a dot. Nothing under the pin. Look cast from inside mold marks. Rough marks are discolorations from moisture/shelf life. Never installed.

 

[pishta]

KB SKB399 as a replacement? I need 1 only.

 

[pishta]

I guess they are in fact " HY-DUTY" pistons, inc. based in CA a while ago, belly up and I need one. I guess Im F'd. I read the compression height as 1.78 and a dome height of .170 so its shorter than a KB399 but has a taller dome. Any 3.9 V6 guys need some pop ups? Cheap and you get an extra...;-)

 

[Abodybomber]

Might calls Egge machine,they used to cast pistons....

 

[Marcohotrod]

shorter comp. height and taller dome-sounds good-do the math on comp ratio if U want to get fancy, and compare weights. U may get lucky, they need to be close, not exact, unless U are racing for the world championship

 

[pishta]

Thanks, Ill just sell the 6+1 set to a V6 guy. I dont even own a 318.