Short news:
On my 5 emails to JE i got no response.
The diameter of the pistons is app. 83,90 mm. I gave the set to my local Porsche mechanic for exact measuring and it seems that i can use this CP-Set with my E-cams.
Engine data: 2,2 E
Year/month: 1971/may
Engine nr: 621 1518
But there´s one question unanswered. Has anybody out there any data regarding cam-timing ? Should i use the factory-timing for the normal E-pistons ?
Any help would be appreciated.