Been a while as my trucks been fine! 
But recent trip has put it off the road!
Dreaded cracked piston.
I’ve gone thru multiple options including buying a bent 100 for the fte, but sold it on.
So am rebuilding the hz. I’ve done a bunch or researching how best to care for it this time. And for the life of me I can’t find a conversation regarding lowering the compression ratio to regular factory turbo numbers. Eg 1hdt 18:1, or 6bt @ 16:1
Choosing the hdt, to drop to 18:1 I gotta find 8cc which if simply milling the piston face was kosha, that’s like 1.1mm
Doesn’t sound like much work.
Get fancy and mill the factory combustion shape down as well to retain its purpose and maybe leave a shelf around the top the same cc amount of the chamber.
This has got to be worth trying!!
There are thicker pistons offered for these too, seems most are pre decked .15. Sole even have fancier elongated chambers in them. Given their kinda dick and balls shapes the elongated ones might be a compensation.
It seems a crude way of dropping CR
Has anyone done or heard of it done? Would it hurt the edge of the head gasket area? Is that dick and balls area really crucial? Cos from where I’m standing, it’s a given the hz was never meant for turbos tho we all wanna do it and mostly end up breaking a thing
But recent trip has put it off the road!
Dreaded cracked piston.
I’ve gone thru multiple options including buying a bent 100 for the fte, but sold it on.
So am rebuilding the hz. I’ve done a bunch or researching how best to care for it this time. And for the life of me I can’t find a conversation regarding lowering the compression ratio to regular factory turbo numbers. Eg 1hdt 18:1, or 6bt @ 16:1
Choosing the hdt, to drop to 18:1 I gotta find 8cc which if simply milling the piston face was kosha, that’s like 1.1mm
Doesn’t sound like much work.
Get fancy and mill the factory combustion shape down as well to retain its purpose and maybe leave a shelf around the top the same cc amount of the chamber.
This has got to be worth trying!!
There are thicker pistons offered for these too, seems most are pre decked .15. Sole even have fancier elongated chambers in them. Given their kinda dick and balls shapes the elongated ones might be a compensation.
It seems a crude way of dropping CR
Has anyone done or heard of it done? Would it hurt the edge of the head gasket area? Is that dick and balls area really crucial? Cos from where I’m standing, it’s a given the hz was never meant for turbos tho we all wanna do it and mostly end up breaking a thing