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911 RSR BOSCH Twin-Plug Distributor (3.0 Liter)

These are photos of the factory BOSCH Twin-Plug Distributor as used on the 1974 Porsche 911 RSR, 3.0 liter race engine. The p/n is "B 237 490 011". The shaft diameter of this distributor is 30mm, just as the 'late' Marelli RSR twin-plug distributor.
911 RSR BOSCH Twin-Plug Distributor - Photo 1
911 RSR BOSCH Twin-Plug Distributor - Photo 1		 911 RSR BOSCH Twin-Plug Distributor - Photo 2
911 RSR BOSCH Twin-Plug Distributor - Photo 2		 911 RSR BOSCH Twin-Plug Distributor - Photo 3
911 RSR BOSCH Twin-Plug Distributor - Photo 3		 911 RSR BOSCH Twin-Plug Distributor - Photo 4
911 RSR BOSCH Twin-Plug Distributor - Photo 4
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 1
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 1		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 2
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 2		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 3
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 3		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 4
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 4
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 5
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 5		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 6
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 6		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 7
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 7		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 8
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 8
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 9
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 9		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 10
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 10		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 11
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 11		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 12
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 12
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 13
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 13		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 14
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 14		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 15
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 15		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 16
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 16
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 17
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 17		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 18
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 18		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 19
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 19		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 20
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 20
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 21
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 21		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 22
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 22		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 23
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 23		 BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 24
BOSCH 911 RSR Twin-Plug Distributor (NOS) Photo 24

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Christian Soriano 19-Nov-2011 12:50
Dear John:
I need a contact breaker point for a twin plug engine for one old Porsche 911 the distributor is Magnelli Marelli
If posible to help me
Best regards
Christian Soriano
slidevalve911rsr03-Dec-2005 17:45
Hello John. The Distributor advance curve is a good question, again from the RSR manual the only specification is the total advance of 27*- 28* total advance @ 8000 RPM.
John Wright 02-Dec-2005 23:58
Do you know of a printed distributor advance specification for this distributor.

I looked in an old Bosch distributor book, but they didn't cover racing distributors.

Thanks,
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