Armin,
Here is the “Identify” page from the
JE website:
How To Identify - JE Pistons
I don’t see a necessary number on your piston.
You should email JE with your image and ask for the specifications on these pistons.
euro@jepistons.com
Measure the diameter of the piston (to 0.01+ mm) to provide them that number.
Measure the piston-to-cylinder clearance and compare to Steve’s recommendation.
I am curious why these appear to be 83 mm.
A 2.2 should be 84 mm.
Are these a 3 mm over-bore on 80 mm (2.0) cylinders?
Please post an image of the head gasket surface on the cylinder (2.0 is a flat gasket, 2.2 is a CE ring).
My lame eyeball tells me the piston crown appear so high that they could be for the deeper 2.0 head and very high CR.
What is the engine number and the type number of your engine?
What are the casting numbers on either side of your crankcase (just below the oil return tubes)?
Best,
Grady
PS: Armin, the translation was an offer to be polite for our members who are not English as their first language.
We want to encourage others world-wide to participate in this Forum.
If a little Google Translate helps, great.
Most, world-wide can read 'Porsche technical' without translation and get the gist.
Anyone can post in their native language and include a Google (or other) translation to English.
Every Porsche enthusiast is welcome here and we
all benefit.
G.