Variable Compression Ratio?

[~JM~]

 

[Chuck Leeper]

Mine worked well @ 850 crank HP.
If more than that, I suggest heat treating the parts to reduce chances of welds breaking.

 

[salvageV6]

Those won't last long without ZDDP additives.

 

[1986 Buick GX1]

What oil should I use with those?? Hahaha

 

[corsair231]

Downside is those are only good for low rpm engines. Anything more that 13,000 rpm and you stand the chance of piston float.