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RS Motorsport :: Classic Speed Restored • View topic - Piston ID
Page 1 of 1

Piston ID

PostPosted: Tue Feb 02, 2010 6:26 pm
by JamesR
i bought a set of TRW Forgies [or so i was told..]
and now im not so sure they are what i was told they are...
unfortunatley i bought these months/years? ago, and figured that ill probably never use them now, so ill sell them.
but can anyone tell me if they are any good?
just realised they're standard size too..
:? :?
cheers.
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PostPosted: Tue Feb 02, 2010 6:56 pm
by gen mk 1rs2000
got any side on pics ?

PostPosted: Tue Feb 02, 2010 7:34 pm
by G Dub
Wouldnt the casting numbers on the underside indicate that they are cast and not forged?

PostPosted: Tue Feb 02, 2010 7:50 pm
by mickas
They are cast. And appear to have a heap of detonation on that pitted one :(

PostPosted: Tue Feb 02, 2010 11:05 pm
by JamesR
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PostPosted: Tue Feb 02, 2010 11:09 pm
by JamesR
iv never really seen forged pistons, so i cant really compare..
but theres no casting lines anywhere which threw me off i guess.

oh well.

PostPosted: Wed Feb 03, 2010 8:19 am
by joe84
they do look like trw forgies as it look like the gudgeon is retained by those circlip thingies i can double check the numbers later i do have a set here

PostPosted: Wed Feb 03, 2010 8:24 am
by joe84
numbers match so they'll be forgies, they just have the lumpy tops taken off

PostPosted: Wed Feb 03, 2010 9:07 am
by JamesR
thanks Joe.
i do remember looking them up ages ago, and i thought i found a reference to that number, and being trw's, but when i checked again, couldnt find anything, so started to seriously doubt myself.

PostPosted: Wed Feb 03, 2010 11:48 am
by joe84
what are some opinions on re using a piston with that much pitting ?? i wonder if there's enough meat to give it another shave ?

btw james pm sent

PostPosted: Wed Feb 03, 2010 12:06 pm
by JamesR

PostPosted: Thu Mar 25, 2010 8:40 am
by mattj

PostPosted: Thu Mar 25, 2010 8:32 pm
by escortmk1600gt

PostPosted: Thu Mar 25, 2010 8:51 pm
by Tom Murphy

PostPosted: Mon Mar 29, 2010 8:36 am
by mattj

PostPosted: Mon Mar 29, 2010 9:26 am
by Tom Murphy
I would guess that you shuld line up the little indent in the piston crown with the inlet valve. Having thouht about the pitting a bit more I think that you should trial build the block as the piston may come obove the deck. I had a set of TRW forged pistons and when they were machined flush with the deck all the indents for the valves were gone.


Tom