piston sizes

[dgym]

hello guys,
I'm trying to get as much info as i can during rebuild of my twin cam and am struggling to identify my pistons.
they are AE branded. the numbers inside read:
20343B
DE 2
AE..
92
G1

no markings as to std or +anything.

ive measured them with the micrometer across the gudgeon pin level at 83.42mm (3.284")

still trying to figure it out but seems that should be around +. 030?

i cant seem to find any useful internet info about part numbers, even having found an old AE- NURAL interchange reference.

please tell me anything you know boys!
-Jim

[Chrispy]

I had AE pistons in mine. There was some more useful info stamped on the crown. Anything on yours? Cleaned the carbon off it yet?

[dgym]

nope, crown is clean and all i have is a hand scribed arrow.
I wonder if they have been machined perhaps.

[promotor]

hello guys,
I'm trying to get as much info as i can during rebuild of my twin cam and am struggling to identify my pistons.
they are AE branded. the numbers inside read:
20343B
DE 2
AE..
92
G1

no markings as to std or +anything.

ive measured them with the micrometer across the gudgeon pin level at 83.42mm (3.284")

still trying to figure it out but seems that should be around +. 030?

i cant seem to find any useful internet info about part numbers, even having found an old AE- NURAL interchange reference.

please tell me anything you know boys!
-Jim

If you were to add piston to bore clearance of 0.003" that would give you a bore size of 3.287" which is closer to +040" (3.290") than it is to +030" (3.280").
What is the biggest measurement you get on the skirts regardless of how high or low on the skirt you measure?

I can't help with clearly identifying the piston numbers other than saying it's not the "usual" Lotus piston numbers I've seen here in the UK.

[2cams70]

Can you post a picture?