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Thread: FS: 87.5mm Mahle Racing Pistons and Cylinders 10.3:1

  1. 02-09-2015, 01:25 PM #1
    specialty72s
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    FS: 87.5mm Mahle Racing Pistons and Cylinders 10.3:1

    For sale is one set of factory 87.5mm Mahle racing pistons and cylinders, 10.3:1 compression ratio. These were removed from a Ritchie Ginther racing engine, and were re-lined (Nicasil) and bored to the original pistons by Ollie’s of Santa Ana, CA approximately 10 years ago. They have been stored in a dry, climate controlled environment since. The number 6 piston has had some minor contact by an exhaust valve and some small debris at some point in time, all of which was checked when the cylinders were re-Nicasiled. The number 6 cylinder has three lower fins broken, as seen in the photos, with no damage to the cylinder or the cylinder wall.

    Our customer purchased these pistons and cylinders for a 2.5L ST project build back in 2005 from Armando Serrano. Included in the photos is a copy of the dyno sheet from Bill Yates (dated 11/4/71). The dyno sheet results: 180 ft-lbs torque at 6,000 rpm and 244 bhp at 7,500 rpm.

    Asking $3200.00 or best offer plus shipping. Located in Allentown, PA 18109. Please contact me at speccar@verizon.net or 610-437-9333 with any questions.

    We also have for sale a set of factory original ST cylinder heads that were a part of the same build and completely rebuilt by Ollie’s. Link here: http://www.early911sregistry.org/for...Cylinder-Heads

    For more photos: https://www.dropbox.com/sh/8qpx3qesy...30oNhhj4a?dl=0
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  2. 02-11-2015, 05:41 PM #2
    914-6gt
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    Hi Mark, when you get a chance can you please confirm that what I sold Paul back in 2005 were in fact the "87.5mm" and not the slightly smaller "86.7mm" MAHLE piston set? At that time, I had both sets of 911 ST MAHLE pistons and can't find my notes easily to verify.

    Thanks!

    ST Engine Configurations;

    911/70: 2,494cc (86.7mm bore x 70.4mm stroke) LONG-STROKE
    power: 275 PS @ 8000 rpm
    valve dia. intake/exhaust: 46mm/40mm
    valve lift intake/exhaust: 12.1mm/10.5mm
    port diameter intake/exhaust: 41mm/41mm
    injected

    ST 86.7mm MAHLE Pistons and Cylinders.jpg

    ST 86.7mm MAHLE Pistons and Cylinders - Photo 5.jpg

    911/21: 2,380cc (87.5mm bore x 66mm stroke) SHORT-STROKE
    power: 250 PS @ 8000 rpm
    valve dia. intake/exhaust: 45mm/39mm
    valve lift intake/exhaust: 12.1mm/10.5mm
    injected

    ST 87.5mm MAHLE Pistons and Cylinders - Photo 2.jpg

    ST 87.5mm MAHLE Pistons and Cylinders.jpg
    Last edited by 914-6gt; 02-11-2015 at 06:58 PM.
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  3. 02-12-2015, 05:09 AM #3
    specialty72s
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    Armando,

    Yes, these are the short-stroke 87.49mm pistons and cylinders.

    Thank you,
    Mark
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  4. 02-12-2015, 06:20 AM #4
    914-6gt
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    Hello again Mark, thank you for the swift reply. I'll take these also, they should stay with the ST heads and glad to see that happen. Armando
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