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2.0S Nitrided rods

I just pulled apart a 69S long block. The connecting rods have a large "S" that appears to have been written with a white permanent marker.

Are these the special nitrided early S rods?

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Tom Butler
1973 RSR Clone
1970 911E
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Old 10-03-2008, 11:07 AM
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Are they black in color?
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Old 10-03-2008, 12:31 PM
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Here's pics.

Not black....But clearly factory marked as "S".

Must be something different between these and standard 2.0 rods.



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Tom Butler
1973 RSR Clone
1970 911E
914-6 GT Recreation in Process
Old 10-03-2008, 04:16 PM
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Tom

Those are the "S" rods. I have seen them in different shades from black to about what you have pictured there.
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Aaron. F.S. 1965 Solex engine w carbs/cleaner
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Old 10-03-2008, 06:22 PM
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Quote:
Originally Posted by tom1394racing View Post
Are these the special nitrided early S rods?
Yes, only early 2-2.4 liter S were nitrated. My guess someone other than factory marked them with white S.

Last edited by Shoepop; 10-03-2008 at 07:27 PM.. Reason: add info
Old 10-03-2008, 07:27 PM
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Quote:
Originally Posted by Shoepop View Post
My guess someone other than factory marked them with white S.
The white "S" marking is a factory marking usually found on the 2.0 S rods.
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Aaron. F.S. 1965 Solex engine w carbs/cleaner
Burnham Performance
https://www.instagram.com/burnhamperformance/
Old 10-04-2008, 06:39 AM
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Somewhere I saw reference to "the special 2.0S nitrided crank".

Is there a difference between the 2.0S crank and the standard 66 mm CW crank?

I thought Porsche had all their cranks nitrided.
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Tom Butler
1973 RSR Clone
1970 911E
914-6 GT Recreation in Process
Old 10-05-2008, 11:46 AM
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Quote:
Originally Posted by tom1394racing View Post
Is there a difference between the 2.0S crank and the standard 66 mm CW crank?
No

Old 10-06-2008, 07:27 PM
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