Verify a Part (distributor)

[911s]

Hi all,

I have a question regarding how to verify a particular part. I recently got a distributor. I was told that it is from a 2.7 RS engine that had MFI. It is a Bosch unit, and has the part number 0 231 184 004. Below the part number is the letters JFUD and the number 6, with an arrow that's pointing left.

I have another distributor, which I believe came from a 2.7l, CIS engine that has the same numbers on it. Is there any way that I can verify that what I received is in fact an RS distributor (without having to have the curve on it checked)? Does anyone know whether the RS had a different distributor body than a CIS? Any help would be greatly appreciated.

Thanks,

Bob (911s).

[Early_S_Man]

Bob,

While the pn you gave was not used on the 'original' '73 RS engines, it was, nevertheless, used in later 911/83 ROW 2.7 Carrera MFI engines! The original RS 2.7 used distributor 0.231.169.011, which used 'mirror-image' points from the later points for the 184-series distributors

No, the CIS 2.7 distributors didn't look any different than earlier MFI 2.4 distributors or the 911/83 distributor! Various numbers from 0.231.184.001 to 0.231.184.007 were used in 2.7 CIS engines after 1974, but NEVER the '004' version which had a much more agressive advance curve than was ever used on a CIS engine, as well as a 7300 rpm rev limiter rotor!

Originally, the 1974 2.7 CIS engines used the same distributor as earlier MFI and CIS 2.4 911T engines ... 0.231.169.008 with a 6500 rpm rev limiter rotor! All of the later 184-series CIS distributors also used 6500 rpm rev limiter rotors.

The following thread has pertinent advance and timing data, and an exploded parts diagram for the 2.4 -2.7 engines' distributors, including the RS 2.7:

distributor lube...

[911s]

Hey Warren. I mistakenly started another post, rather than reply to this one. Anyway, thanks for the info, and appreciate any insights you may have in using this '004' distributor on a 2.7 with webers and solex cams.

Thanks,

Bob.

[Early_S_Man]

Great info Warren! So, the '004' should be for MFI engines. I intend on using it on a 2.7 with webers and solex cams. I've heard that CIS distributors need to be recurved for this type of application, so I'm hoping that this distributor will work for me. Appreciate any insight you may have in this subject!

You probably don't have a good source of vacuum that provides a strong signal at idle, so I would recommend not using the vacuum retard at all, since it was only effective at idle for emissions compliance! Timing would be set at 10° BTDC @ 900 rpm under those circumstances.

Below are the advance specs for the '004' distributor:

[911s]

Thanks warren! That's the information I needed (setting initial advance at 10 degrees BTDC @ 900rpm w/ vacuum disconnected). Thank goodness for the people like you that are on this BB.

Thanks again,

Bob.