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-   -   1.8 stock piston pictures? (https://www.miataturbo.net/engine-performance-56/1-8-stock-piston-pictures-35311/)

Faeflora 05-21-2009 11:02 AM

1.8 stock piston pictures?
 
Does anyone have any pictures of stock 1.8 pistons? I'm looking for a head-on shot that shows the valve relief cuts.

I've searched all over the interweb and I can't find any pics. Plenty of wisecos/supertechs in this forum but again, I couldn't find stock pics.

Thanks much..

magnamx-5 05-21-2009 01:07 PM

They all have reliefs on em yeah, even though our motors are non interference i gues its just for insurance.

Faeflora 05-21-2009 01:14 PM

I'm looking for pics because I'm wondering if the stock pistons have the same little dimple that the supertechs do..

Laur3ns 05-21-2009 05:03 PM

At your service:
http://lh5.ggpht.com/_Oml-XV4A08o/SM...0/21082008.jpg

The chip missing from the top-right corner is not OEM.

bayside blue 05-21-2009 11:40 PM

4 Attachment(s)
heres some high quality pics from when i first took my head off...
ill get a pic or them cleaned up for you later

Attachment 205681

Attachment 205682

Attachment 205683

Attachment 205684

Braineack 05-22-2009 08:41 AM

these are 1.6L pistons, they look very similar...

http://boostedmiata.com/bad_rings/melted_piston003.JPG

richyvrlimited 05-22-2009 09:53 AM


Originally Posted by magnamx-5 (Post 410742)
They all have reliefs on em yeah, even though our motors are non interference i gues its just for insurance.

Surely the engines are non interference because of the relief cuts in the pistons?

Faeflora 05-22-2009 10:31 AM

OK so I can't tell. Are these stock pistons or supertech pistons?

http://i8.photobucket.com/albums/a48...y/DSCN0994.jpg
http://i8.photobucket.com/albums/a48...y/DSCN0995.jpg
http://i8.photobucket.com/albums/a48...y/DSCN0996.jpg
http://i8.photobucket.com/albums/a48...y/DSCN0997.jpg

Braineack 05-22-2009 10:40 AM

they look like stockers to me. y8s has supertechs in his possession, ask him to compare.

Savington 05-22-2009 03:28 PM

1 Attachment(s)
Attachment 205661

Super similar, but there's that little dot on the squish area that the Supertechs don't have.

Faeflora 05-22-2009 04:31 PM

So, the pistons I posted are indeed supertech not stockers?

mistersolo 05-22-2009 05:06 PM

1 Attachment(s)
Here's a picture of a new 01 piston. It has three height levels on the face total. The valve reliefs are larger for the intake side of the piston.

The piston next to it is supertech's try at a 84mm factory compression piston. Note the dot on the top surface towards the right.

Your 03 piston should look like the 01 posted if it is factory. - which is doesn't.

Yours could be lower compression supertechs.

Most of the factory pistons have a small cresent shape cut out of them between the intake valve reliefs and the perimeter of the piston.

John

Faeflora 05-22-2009 05:57 PM


Originally Posted by mistersolo (Post 411071)
Here's a picture of a new 01 piston. It has three height levels on the face total. The valve reliefs are larger for the intake side of the piston.
John

Thanks John, the 3 height levels looks like the easiest way to tell. I guess this motor does indeed have the supertechs.

Thanks also to everyone else that posted pics!


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