Got the part number for 12 plug single diz??

[cstreit]

Gang,

Looking for the part numbers for the 12 plug RSR distributor and rotor from Bosch. Not the dual cap design, but the single cap, does anyone have them?

THANKS!

[emcon5]

I remember hearing that Andial does conversions, and sells the parts. I also remember hearing that the distributor cap is > $1K.

http://www.andial.com/

Tom

[Wayne 962]

There were many different types of these, depending upon the advance curve and the application it was used in...

-Wayne

[Eric Coffey]

Steve W. of Rennsport Systems is the RSR/twin-plug guru up here in the Northwest. I am sure he would have the info you need. Prepare yourself though, I heard the caps alone are over $1000.


RS Systems:

503-244-0990

or:

www.rennsportsystems.com/~porsche/

[brianhinfl]

Yes, talk to Steve W. I remember him telling me there were only like one or two of these.

He is the guru on these things.

[beepbeep]

*cough* for 1000 bucks you can almost get complete mappable direct-fire system with EFI *cough*

Ohh...i forgot...you like MFI and stuff, right?

[cstreit]

Well not exactly. I'm trying to get a few thru an "insider" from "somewhere"...

Basically I need the part numbers for the ones that would work on my 3.0L diz... Or do I not know what I am talking about?

[dean]

I heard they are not made anymore

[Doug Zielke]

At JW's swapmeet this summer, a bunch of us coralled Steve Weiner (who was also looking for a bargain) and tapped his vast knowledge on a multitude of subjects.
I remember him saying somthing about having 12 lead caps made up...until he found out how many thousands he'd have to sell in order to amortize the tooling cost!

[Wayne 962]

These distributors are designed for race use - not street use. As a result, none of them (at least I don't think) have centrifugal advances in them. Maybe the twin Marellis did.

Therefore, they won't work well on street cars at all. The reason why they don't have centrifugal advances is because they are meant to be run in race cars, along a narrow band. So the timing is set for that band.

I would recommend a Tec-3 system over one of these distributors. Andials solution is probably better if you want to have that big twin-plug look...

-Wayne

P.S. All this info is in the new book...

[brianhinfl]

Wayne

I think you were given some wrong information. I referred to my notes from my many engine building discussions with Steve Weiner @ Rennsport. This guy has forgotten more about twin-ignition hardware than most people know,..

Here's the quick summary:

Bosch made 2 breakerless twin-plug distributors; one with
advance for the RSR and one without for the 934-935. The RSR
one works fine in street or race engines. The distributor is
not smart enough to know, nor care if its in a race engine or
in a street engine.

The Marelli twin-plug distributors (2 versions) all had
advance mechanisms and worked great in any twin-plug engine.

The Andial-converted ones used production Bosch breakerless
unit and modified it to accept the RSR cap and rotors. Works
great, if you can get the RSR cap & rotor.

[andyjboy]

Chris, I was doing a bit of 'digging' around on this subject recently in an attempt to identify a Bosch twin-plug distributor that was in a box of parts that came with an original 911R engine.
These engines originally used the Marelli twin-plug distributor but if anyone thinks that Bosch twin-plug caps are expensive they should try getting new parts for the Marelli equivalent !

Anyway as far as I determined by liaising with various experts (including numerous discussions with both Steve Weiner of Rennsports Systems & Peter Sanchez at Andial) is that there were at least 4 different Bosch twin-plug distributors used:

Early 2.8 RSR (with contact points) ? ??? ??? ??
Late 2.8 RSR (breakerless) B 237 490 11
935 (breakerless) B 237 490 13
3.0 RSR (breakerless) 0 267 490 13

The best price I found on the RSR twin-plug cap was $380.

Incidentally, this RSR twin-plug distributor c/w twin CD boxes & associated wiring was sold on ebay last week for $2500.






Andy Boyle (UK)
'69 911E

[Wayne 962]

I did check, and you're right - I had forgotten about the RSR one. This is because the 917/935 one is much more common (if you can even say that) than the RSR one.

Still, in the grand scheme of things, using one of these distributors is mainly for show - it's not practical (money-wise) to install these in a street car. For the amount of $$$ that you spend on a distributor, you can buy a 964 setup or crank-fire ignition and a supercharger setup! I have seen these distributors go for about $4000-$5000.

-Wayne

[Early_S_Man]

Chris,

Bosch twin-plug cap -- 911.602.950.00

Bosch twin-plug rotor -- 911.602.927.00