Which distributor do I use
 

I have just about finished rebuilding my 2.4T and I have two distributors that I can use. One part # 0.231.184.004 is for a 75-76 Carrera. The other #0.231.169.008 is for a 73 T Canada/ROW? My car now has 2.2s pistons, GE40 cams, MSD6 ignition with optical trigger, SDS electronic fuel injection and the head ports have been opened up to match the manifolds ~33-34 mm. I was planning on not using the vacuum retard on either dist. Are the advance curves on these two close enough to not matter? Or is there one clear choice?
Thanks in advance!
Barry

Thanks "in advance"? I think there's a pun in there somewhere. Thanks in total advance, vacuum advance...

Use the later 0.231.184.004 version, which is for ROW Carrera 2.7 cars, not USA models! It has the same advance curve as the original '73 0.231.169.011 version for the RS 2.7. Advance is set at 10 degrees before TDC without the vacuum retard connected, and should be 32-38 degrees Before TDC at 6000 rpm -- when checked VERY BRIEFLY!

The later distributor has been sold by PMO for several years as an upgrade when converting to Weber/PMO carbs!

------------------
Warren Hall
1973 911S Targa

Out of curiosity when should a 911 dizzy be "all-in"?

6000 RPM seems a little high to just start being all-in advance wise. I would think it would be all-in by 5000 RPM.

On the VW type 1 engine running a Bosch 009 I always time it at 3500 RPM for all-in with 32 degrees of advance. And the engines will usually start fading about 5000 RPM. Note that usually the engines are not stock, stock would hit the wall at about 4500 RPM.

Thanks

------------------
Adrian Pillow
1979 911 SC
1966 VW Microbus
PCA - Peachstate Region

The majority of the advance is 'in' by 4000 rpm. in the spec book, the last two test levels are at 4000 rpm and 6000 rpm, and the acceptable range of advance for the 6000 rpm mark begins at the same advance as the top limit of the 4000 rpm test. For the RS 2.7 disrtibutor, the range is 25-31.5 degrees @ 4000 rpm and 32-38 degrees @ 6000 rpm.

This was illustrated in a recent topic in graphical form from the service manual for '72-'73 cars:

http://www.pelicanparts.com/ultimate/Forum3/HTML/009677.html


------------------
Warren Hall
1973 911S Targa

I was just talking to my mechanic about this, as I'm looking to fire my RSR dual plug setup with a converted euro distributor. I have a line on an ROW SC distributor (this is for an SC BTW), but my mechanic mentioned that PMO sold these 2.7 ROW's for carb use for years new, and at a reasonable price (he recalled $250). Anyone know if PMO still sells these, and how much? I don't have the patience to setup faxing just to find out the details on 'em.

Hello

The 169 series is NLA and replaced by the 184 series.

The 2,4 S & Carrera curve is more aggressive then the T curve. And therfore would suit better. Maybe you have to recurve it to 2,2 S specs.I also would try vacuum advance

Grüsse

Gentlemen, Thank You for your information and links!

P.S.
Warren "what's really going on out at Groom Lake?"