Originally Posted By: clinebarger
That's a Selectively Austempered Ductile Iron Cam Core (SADI), This material IS NOT suitable for Roller Cam applications, Even after the hardening process.....The work surface is still cast iron!!
In the 90's some budget aftermarket (Retro-fit) roller cams were SADI cores, Failure rates were VERY high, I can't believe an OEM manufacturer would use this in their "flagship" engine.
These cams are around $68 dealer cost.
That's a Selectively Austempered Ductile Iron Cam Core (SADI), This material IS NOT suitable for Roller Cam applications, Even after the hardening process.....The work surface is still cast iron!!
In the 90's some budget aftermarket (Retro-fit) roller cams were SADI cores, Failure rates were VERY high, I can't believe an OEM manufacturer would use this in their "flagship" engine.
These cams are around $68 dealer cost.