 915 /916 mechanical speedo drive, 915 /916 mechanical speedo drive |
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| rgalla9146 |
 Oct 28 2025, 04:58 PM
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Advanced Member  Group: Members Posts: 4,840 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None 
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Anyone here have a running driving Martin Bott 915 / 916 conversion with mechanical speedo drive ?
My car is up and driving but my mechanical speedo shows 120 mph when GPS says 60. I've tried other 914 speedos and even borrowed a '72-'73 911 speedo to see if that was the difference. It wasn't. A well known instrument restorer suggested the difference I was seeing was outside the range of normal adjustment. I'm trying to stay with 914 era parts. Anyone ? |
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| Steve |
Oct 29 2025, 08:09 AM
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914 Guru Group: Members Posts: 5,955 Joined: 14-June 03 From: Laguna Niguel, CA Member No.: 822 Region Association: Southern California
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Did you try reaching out to Martin? It does sound like a trans gear issue. You can also try James at PMS. He built my MB 916 trans, but mine is an electric speedo. Ron is the only one that I know of that installed the mechanical drive option. He hasn’t checked in for awhile.. @RON S.
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Posts in this topic
rgalla9146 915 /916 mechanical speedo drive Oct 28 2025, 04:58 PM
mepstein Can you substitute a 914 drive and try it. Oct 28 2025, 06:54 PM
rgalla9146
Can you substitute a 914 drive and try it.
Mar... Oct 29 2025, 06:53 AM Maltese Falcon See if California Motorsports (Lake Havasu) has a ... Oct 29 2025, 05:07 AM |
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