Forums » Classic Cars » Sunbeam Alpine -- mechanical tach drive
  • Treb

    July 26, 2010 1:43 p.m. Treb Reader

    My brother in law has a nice S3 Alpine, with a S5 motor installed. The S3 came with the 1592 (I think) and the S5 with a 1725.

    The later car used an electronic tach; the tach in the S3 is mechanically driven from the distributor shaft.

    Before he sent it out for a high-dollar restoration, I had made a small spacer to go between the bottom of the S3 distributor and the S5 engine. This let us use the S3 assembly and the mechanical tach.

    When it came back from the restoration shop, the engine had been rebuilt as a pure S5, and the S3 tach disabled. (No idea at the moment on the whereabouts of the S3 dizzy and tach drive)

    Here's my question: how should we adapt the S5 engine/distributor to the S3 tach?

    Thanks Matt

  • Treb

    July 29, 2010 2:45 p.m. Treb Reader

    Anybody?

    Heck, even a picture of the tach drive for an S3 would be a big help. I recall some sort of alloy plate with the takeoff built in, but it's been ~ 10 years since I worked on this.

    Thanks Matt

  • Series6

    July 30, 2010 12:35 a.m. Series6 Reader

    Treb,

    I can't help you as both of mine have/will have Ford V6's.

    I might recommend posting the question on the Sunbeam Alpine Owners site. www.saoca.org

    No cost to join the Forums.

You'll need to log in to post.

Moroso
Lime Rock Park
Saferacer

Yes or No

What’s your favorite British sports car?

Triumph

45%

MG

13%

Austin Healey

19%

Aston Martin

3%

Jensen / Jensen Healey

3%

TVR

13%

Morgan

3%

Check back soon for the next poll. View all polls