Twin Plug Distributor

[atelier14]

As I am considering twin-plug ignition on my spare hot-rod 3.0L SC engine with 46 PMOs I wonder what the 'best' twin plug dist. would be to purchase in terms of accuracy/ tolerances/ overall building quality/ reliability?

JB Racing's dist. seems to have a good reputation and are used extensively also here in Europe, so this might be the 'best' way to go?

I plan to run it with a twin coil MSD.

Any suggestions or personal experiences are appreciated!

Many thanks,
Christian

[Steve@Rennsport]

Originally Posted by atelier14

As I am considering twin-plug ignition on my spare hot-rod 3.0L SC engine with 46 PMOs I wonder what the 'best' twin plug dist. would be to purchase in terms of accuracy/ tolerances/ overall building quality/ reliability?

JB Racing's dist. seems to have a good reputation and are used extensively also here in Europe, so this might be the 'best' way to go?

I plan to run it with a twin coil MSD.

Any suggestions or personal experiences are appreciated!

Many thanks,
Christian

Thats an excellent choice.

[Turbo_pro]

I use the Supertec / Rennwerks distributor with very good results.
I chose the Supertec option because I wanted a distributor that had an old school aesthetics. I really hate use billet aluminum parts on my 911s and turbo engines.

Billet stuff looks great on my hot rods but just doesn't seem right on a Porsche.

[atelier14]

Jim,

Got your point regarding the aesthetics.

Does the Rennwerks from Aaron/ Supertec contains internal ignition triggering with an adjustable advance curve? What sort of bearings/ bushings and internal shaft seals is used?

Do you use it with a MSD? Is the price comparable to the JBR?

Thanks,
Christian

[blue72s]

Saw this at the early registry today:
Porsche 911 RSR BOSCH Twin-Plug Distributor Reproduction Made in Germany

[m1franck]

If you are not concerned with an "original" looking distributor filling the hole in the engine case, wouldn't an Electromotive crank trigger setup be a better way to go? Seems like at under $1,400 it would cost less than these 12 plug wire distributors & would certainly be a cleaner install since you don't need 2 CDI or MSD boxes. Aren't they also much more tunable that a traditional distributor?

What's the downside, other than not being original looking?

[AlfonsoR]

Ignition accuracy is the key to making the most power, right.

[Turbo_pro]

Originally Posted by atelier14

Jim,

Got your point regarding the aesthetics.

Does the Rennwerks from Aaron/ Supertec contains internal ignition triggering with an adjustable advance curve? What sort of bearings/ bushings and internal shaft seals is used?

Do you use it with a MSD? Is the price comparable to the JBR?

Thanks,
Christian

The distributors are built (curved) to your engines specifications.
The foundation for the distributor, hence the triggering mechanism is from a stock 911SC or 930 turbo. I think the early distributors are actually based on a BMW distributor.
The Rennwerks/Supertec distributor uses shaft bushings like the stock SC but adds a sealed high speed ball bearing directly under the rotor for additional high speed stability (much like the Marelli and Bosch twin plug distributors).

I use the MSD 6AL as recommended by Henry. 1 MSD box and 2 high vibration Blaster II coils.

I believe the Rennwerks dist. is slightly more expensive.

[atelier14]

Thanks Jim.

Don't you need to run twin MSD boxes (6AL) on a twin plug setup?

Best,
Christian

[Carrerax]

After talking to several people including Steve W, I decided on the one from JB Racing. IMHO it had a few benefits and my wires are also from JB. Steve W was able to spec the dist and JB made it and the wires to Steves specs. It is a beautiful piece. Plus the wires are the nicest ones I have seen (especially after I got all the white lettering off of them). Anyway, a big thanks to Steve and the guys at JB. FYI, the motor is a 3.2ss with RSR pistons, 46PMO and mod s cams.

[JohnJL]

Originally Posted by atelier14

As I am considering twin-plug ignition on my spare hot-rod 3.0L SC engine with 46 PMOs I wonder what the 'best' twin plug dist. would be to purchase in terms of accuracy/ tolerances/ overall building quality/ reliability?

JB Racing's dist. seems to have a good reputation and are used extensively also here in Europe, so this might be the 'best' way to go?

I plan to run it with a twin coil MSD.

Any suggestions or personal experiences are appreciated!

Many thanks,
Christian

That's exactly what I run in my hot 3.0 with 40IDA Webers.

[lindy 911]

I have a Rennwerks twin plug with one MSD 6AL firing two blaster coils. It works well. If you want the full output of each coil you will need two boxes but some say it's not necessary.

Lindy