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-   -   Wossner Pistons? (https://www.miataturbo.net/engine-performance-56/wossner-pistons-103973/)

Oil Leak 10-09-2020 10:17 AM

Wossner Pistons?
 
1 Attachment(s)
Recently bought a set of 12:1 85mm Wossners, and haven't seen many people use them, or post much about them.

Was wondering if anybody has experience using these, and if the rings that come with the pistons are sufficient?

technicalninja 10-09-2020 11:10 AM

What I see is SHARP edges on the pop up.
Sharp edges are usually bad to have in the combustion chamber.
I will avoid this brand because of your picture...

Oil Leak 10-09-2020 11:24 AM


Originally Posted by technicalninja (Post 1583217)
What I see is SHARP edges on the pop up.
Sharp edges are usually bad to have in the combustion chamber.
I will avoid this brand because of your picture...

1- Wossner is a very repeatable high-end piston manufacturer
2- How do you think you increase compression ratio, you pinecone.

Midtenn 10-09-2020 12:24 PM


Originally Posted by technicalninja (Post 1583217)
What I see is SHARP edges on the pop up.
Sharp edges are usually bad to have in the combustion chamber.
I will avoid this brand because of your picture...

If you zoom into the picture you can see the dome has chamfered edges.

gesso 10-09-2020 12:38 PM


Originally Posted by technicalninja (Post 1583217)
...Sharp edges are usually bad to have in the combustion chamber.


Originally Posted by Oil Leak (Post 1583218)
...
2- How do you think you increase compression ratio

I mean sharp edges do take up more volume than rounded over edges, thereby increasing compression. But I would usually be concerned about sharp edges being causes of increased detonation. Increased compression and increased detonation seems like a bad idea...
​​​​

Oil Leak 10-09-2020 12:56 PM


Originally Posted by gesso (Post 1583227)
I mean sharp edges do take up more volume than rounded over edges, thereby increasing compression. But I would usually, be concerned about sharp edges being causes of increased destination. Increased compression and increased destination seems like a bad idea...
​​​​

Yes, this will help me get to my destination at an increased rate.

LeoNA 10-10-2020 06:04 PM

No manufacturer makes a ready to run piston. Unless your seeking detonation and broken ring lands. They all have to be massaged. Some are better then others just by design but they all need blending and deburring.

Oil Leak 10-12-2020 08:00 AM


Originally Posted by LeoNA (Post 1583304)
No manufacturer makes a ready to run piston. Unless your seeking detonation and broken ring lands. They all have to be massaged. Some are better then others just by design but they all need blending and deburring.

You're**

I have an extremely competent machinist handling the heavy lifting, and a CNC head being built with these pistons in mind. Thank you all for the irrelevant and useless input completely unrelated to the question at hand.

concealer404 10-12-2020 10:03 AM


Originally Posted by LeoNA (Post 1583304)
No manufacturer makes a ready to run piston. Unless your seeking detonation and broken ring lands. They all have to be massaged. Some are better then others just by design but they all need blending and deburring.


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