question about Mazdaspeed 3 stock piston

[nocoastgangster]

I took some pictures at Zoom Zoom Live in Chicago, IL, and I have a question about the piston i saw in the engine cutaway they had. It has a black spot in the center of the sidewall of the piston? I was wondering if somebody could tell me what it is, and it's purpose? I've uploaded some pictures to show what i'm talking about.
Thanks ahead of time,
Tim

 

[Brian MP5T]

Coated Skirt to reduce scoring the cylinder,

Works like the Razor "Smooth Strip" that you used daily..

It's a way to improve the stability of the piston during movement without having to make the piston so close, that it causes problems.

 

[SeanMSIII]

I took some pictures at Zoom Zoom Live in Chicago, IL, and I have a question about the piston i saw in the engine cutaway they had. It has a black spot in the center of the sidewall of the piston? I was wondering if somebody could tell me what it is, and it's purpose? I've uploaded some pictures to show what i'm talking about.
Thanks ahead of time,
Tim

I saw the cutaway at ZZL in Houston. Pretty cool but a little rusty. Anyway, did you get a shot of the tiny turbo? I'd love to have that for desktop wallpaper or maybe an avatar.

 

[nocoastgangster]

tiny turbo

here are some pictures I took of the turbo. a few are cutaways.

 

[Captain KRM P5]

even the aftermarket pistons for this car have the coating, ie - supertechs

 

[Brian MP5T]

here are some pictures I took of the turbo. a few are cutaways.

That looks like a Brass Journal Bearing, Not a Ball Bearing????

 

[SeanMSIII]

here are some pictures I took of the turbo. a few are cutaways.

Thanks! I get a bizarre thrill out of looking at the guts of this stuff. I suppose it allows me to pretend I understand how it all works.

 

[Brian MP5T]

It's as simple as it gets...

A Turbine
A Compressor
A Bearing

 

[SeanMSIII]

It's as simple as it gets...

A Turbine
A Compressor
A Bearing

Oh, enlightenment! Sorry, I didn't mean to sound that mechanically naive. I don't mean the function of the big pieces, I mean every intricate detail revealed by the cutaway as well as the whole device. Any mechanical device, not just a turbo.

 

[Brian MP5T]

^^ I'm just a H8TR early in the AM.. It was just a joke..

 

[msp35]

Why are there 2 nipples on the WGA?