andy2
Veteran Member
- Joined
- Sep 24, 2004
- Location
- Bowmanville,Ontario,Canada
- TDI
- 13 Jetta,94 Golf drag car 585bhp,Samurai buggy BHW 300bhp,97 Ram cummins
The camshaft is something like 270-272*. We should really tear down the engine to see if the .009" piston to cylinder wall clearance is necessary or not. The ring end gap was also getting big with the extra piston to cylinder wall clearance.Now I remember the pictures you posted back when turning down the core for that.
nice wide piston/wall clearances there
I also vaguely remember your diamond pistons didn't have steel ring land inserts, did you have any troubles with the lands sinking down?
I've had a rash of broken top rings lately and the secondary ring lands always seem to mush their way down into the oil ring when they're forced to take up the slack without the steel insert
Are you making your own pistons now? If so wouldn't be surprised,lol !
Thats my only other worry about my current pistons ,the ring lands. Never had an issue without having the steel ring land insert on the diamond pistons. They were not used in a "daily driver" application and would never see any measureable wear.