just been looking thru all my old pics on computer and found this...

now story behind it, is im a mechanic, and work mainly on coaches,
well i undertook a engine re-build of a VOLVO B12m engine that was knocking,

i'd never done one before but ploughed on anyway,
whn it came to taking the pistons out, this is what i found...







now i can clearly understand the reason/design of it!! mega strong heavy crown.
lightweight alluminum skirt...
held together by the pin,

my question... altho its not somthing i am going to do..
would it be possible to re-create a custom piston of this design for car engines??
and if so.... would there be any benefit in doing it?






now if somone knows of this design already in a car... ignore the thread and call me stupid lol!!

 

Pointless, expensive, and probably worse.

That engine has very different requirements to a smaller engine.

 

this is what i thought.... but thought it might make for interesting discussion lol...

 

i wouldn't think it beneficial to try it, it will be very heavy, all designed for a high torque low revving engine after all with big displacement relative to a car engine.
less skirt is better though like some of the cosworth and JE pistons, even standard zetec types aren't bad.

 

What is the top section made from ?

 

tbh mate i dont know, all i remember is it was heavy! and the skirt was light as a feather

 

Same here, ive built a few truck engines up and some have had this seperate crown and skirk combo, mega heavy crown and light weight skirt.

Seen a few of the crowns "eaten away" on the thrust sides too!!, usually on chipped trucks or scania's that have been round the clock or had common injector faults (scania's) lol