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gla924sem · Joined: 08 Nov 2002 Posts: 405 Location: Taylor, Michigan

Anyone have a picture of a 1982 NA Piston?

Took the engine to the rebuilder yesterday and he felt that my 1982NA might have turbo pistons instead of NA ones.

Mine look identical to the ones in the engine section of the Haynes manual.

I was a rookie when I had the engine rebuilt 14 years ago and this is the first time I've seen then since.

daniel · Joined: 18 Jun 2009 Posts: 687 Location: Sydney, Australia

Both NA and turbo pistons are dished, he is most likly expecting to see a flat top.
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gegge · Joined: 27 Jul 2007 Posts: 1124 Location: Sweden

Yes, but only the NA has valve reliefs and doesn´t sit flush to the blockdeck like the turbopistons.
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Carl Fredrik Torkildsen

924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
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924RACR · Posted: Mon Dec 20, 2010 10:28 pm Post subject:

Turbos have a really insane dish, look like you could use them to hold candy.
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Harm · Joined: 02 Apr 2009 Posts: 1378 Location: Holland

gegge · Joined: 27 Jul 2007 Posts: 1124 Location: Sweden

Any idea if they are cast of forged?
How deep is the dish?
Are they 100% non-interferance?
Do they sit flush to the deck?
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Carl Fredrik Torkildsen

924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs

gla924sem · Joined: 08 Nov 2002 Posts: 405 Location: Taylor, Michigan

THANKS........that's what mine look like.

Will convey this info to my engine rebuilder.

Brockoli · Posted: Tue Dec 21, 2010 12:24 pm Post subject:

Harm - is the first pic you posted euro pistons? I think they are. I thought all the NA north American pistons had lots of dish and euros had a very slight dish with big valve clearances.
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