3tc compression? (diff pistons)

[japlish]

hi guys,
i have a question regarding stock 3tc pistons: how many different oem versions were there?
a friend and i recently picked up a 13t and it has different pistons to my mates old one and as far as i know they both had stock pistons?

this is the top of the 13t one (piston NOT at TDC yet):

and the top of a 3t one:


now i know its impossible to get an exacting answer but does anyone know which one may have better comp?

[WDE_BDY]

From memory, 13T pistons will not work with the 3T head and the 13T head is crap with a heap of emission gear.

Callum

[w810sc]

Just by looking at the pistons I would have to say the 3T would have better comp. If you want to raise it up a bit more you could use the 2T head (smaller squish area) or in combination of decking the block and shaving the head plus using a thinner head gasket.

[japlish]

maybe the 13t dome is higher on one ide to make up the same comp as the 3tc piston?

i was just going to deck the head, i've been told you can go as far as 2mm? (if the head has never been milled before)

anybody know where to get a thinner HG?

[dude]

do you want some high comp forgies for it? my mate has a set he may sell cheap....pm me