pistons

[Organic]

Price: $1025

Location: CA

Description:

 

$1025 shipped
 

NOS 

OEM

 

Edited April 5, 2020 by scooby

[Recycler]

Hi Scooby

 

In the market for these ... contact me at

projectsllc@cox.net

 

Steve

[Organic]

On 4/4/2020 at 11:19 PM, Recycler said:

Hi Scooby

 

In the market for these ... contact me at

projectsllc@cox.net

 

Steve

steve is passing on these, so they are still available 

[otisdog]

Can you give us a little more info on these? I run the number on OEMBMW and get a 'specified part number was not found'.

Thanks

 

[jk16vturbo]

I believe these are Tii Piano Tops as I have heard them referred to before.

[Conserv]

First oversize (“+0.25” and “89.22”). And piano-top implies an E12 head...

The height of the piano-top determines the compression ratio. There are threads that correlate height with compression ratios, as E12 piano tops were manufactured in a range of compression ratios: I believe from 8.3:1 to 9.5:1 (was there ever a 10.0:1 ratio for European tii’s with E12 heads?).

Likely irrelevant comment: those orange labels indicate bona fide old NOS. I believe the orange labels were phased out in the 1980’s! Cool.

 

Regards,

 

Steve

 

Edited May 31, 2020 by Conserv

[venoak]

Just some additional information about historical use of this size piston.  
For what it’s worth, I’ve got a factory rebuilt replacement m10 (Red or was it Blue bolt) in my car.  When KB refreshed it, a few years back now, we discovered that the factory rebuilt replacement motor carried first oversize overbore (“+0.25” and “89.22”) piano tops.  I think this was the standard configuration for replacement m10’s from BMW back in the day.  Not sure about the compression ratio, we didn’t think to measure the piano top height at that time.

 

Mark

[02Les]

According to the BMW Blue Parts Book...……...

11 25 1 261 880 = Euro tii

 

HTH

[otisdog]

2 hours ago, 02Les said:

According to the BMW Blue Parts Book...……...

11 25 1 261 880 = Euro tii

 

HTH

W&N says this part number CR = 9.5:1

[otisdog]

Well, since folks are still reading this a week later....W&N also said that they've never seen a 10:1 oem piston for the E12 head....

[shermanmartinez]

Walloth & Nesch are correct. 9.5:1 for E12.

shermanmartinez at Hotmail dot com

[TicoCafe]

Are these still available? I realize its an older post..