Crawler
Full Access Member
I am not an IDI expert what so ever. So take what I ask or say with a grain of salt.
Any engine that is assembled with the possibility of tight tolerances or with custom parts, or any valvetrain modifications, should have the PTV checked. No matter what a builder/designer/seller/assembler/aunt May/witch doctor say.
Valve reliefs are a common thing in the diesel world. Often times a better way to get PTV clearance vs sinking the valves and messing with valvetrain geometry.
Modifications to the head, valve recession, etc... plays a part in compression. So not flycutting pistons for compression reasons is not a good argument vs modifying the head.
How much is the base circle on the cam being ground down? Would a larger cam blank help with the valvetrain issues y’all have mentioned? I know the Cummins and Duramax guys have run into this on larger cam grinds. I just don’t know the specs on the IDI cam and how y’all are grinding them.
Any engine that is assembled with the possibility of tight tolerances or with custom parts, or any valvetrain modifications, should have the PTV checked. No matter what a builder/designer/seller/assembler/aunt May/witch doctor say.
Valve reliefs are a common thing in the diesel world. Often times a better way to get PTV clearance vs sinking the valves and messing with valvetrain geometry.
Modifications to the head, valve recession, etc... plays a part in compression. So not flycutting pistons for compression reasons is not a good argument vs modifying the head.
How much is the base circle on the cam being ground down? Would a larger cam blank help with the valvetrain issues y’all have mentioned? I know the Cummins and Duramax guys have run into this on larger cam grinds. I just don’t know the specs on the IDI cam and how y’all are grinding them.
