Pertronix info for 76 2.7L

[911Bus]

I have a 1976 2.7L with 40 IDA's and Bosch dist. I just tried to instal the Pertronix 1867 and it seems that it will not let the advance move as it is almost touching it? What Pertronix # have you used?
Below is a pic of the dist as I don't have the # with me. I'll pull it out after lunch and post what #'s I find. Also, will these grounded ignition wires work with MSD?


Any help would be greatly apreciated.
Geoff.

[911Bus]

Since no one has replied I ground down the edge of the mounting bracket of the pertronix so it would allow enough room for the advance to move. It fired right up and idled smooth a check of the timing and I took it for a test run.
It now runs like crap! It feels the same as when the points are dirty (it feels like the spark is scattering or not enough spark) I only have a Bosch red coil with the pertronix and no CD or msd . Could this be a reason for tha bad running?

I have a 6al that I may instal but also need to know if the sheilded wires in the above pic (Beru) will work with a MSD.
Thanks.
Geoff.

[Rex Walter]

Geoff,

I have a 6AL and pertronix on my 2.7L. I had to work to get the pertronix to slide down the dist shaft far enough to allow the rotor to seat correctly. I also have the ground straps on my wires with no problem. If your engine is not running well, double check your timing, your plug wires, and vacuum advance.

Rex

[bigchillcar]

damn..thought i'd been smokin' crack staring into that engine bay (beautiful motor, btw). i just couldn't figure out what in the hell kinda mod you'd done to your p-car..
ryan

[Rex Walter]

Wait! Did you say that you don't have a CD box hooked up? Just points and a coil? You cannot use the pertronix to replace the points if you do not have a CD box. The points ground the coil while they are closed, which allows the coil to build up a charge. When the points open, the charge is dumped through the plug wires to the spark plugs (a very simplified explanation). The pertronix is only a trigger for the CD box. They do not ever complete the circuit to ground, and will not allow the coil to build up a charge. The CD box allows the coil to build up a charge faster, that way it can supply multiple sparks at low RPM, and a stronger spark at high RPM than conventional points. When points are used with a CD box, the points act only as a trigger, they do not carry voltage through the coil to ground any more. That's why points last so long when used with a CD box.

Just hook up your MSD box - I can tell you how I hooked up mine. It's easy.

Rex

[Rex Walter]

After reading more from pertronix, it looks like you can use it to replace the points. It must ground the coil electronically. Re-check your connections. I used the part number PE-1867.

Rex

[911Bus]

Thanks Rex,
I'm going to instal the MSD tonite. The motor runs good up till aprox 3500-4000 RPM then it just seems to die off and I guess that there just isn't enough spark. The MSD works well in all my other cars so i'll give it a try in the Porsche Bus.

Thanks.
Geoff.

[}{arlequin]

I can't believe it's running at all WITHOUT any CD box in there....

You can use the "grounded" wires with the MSD. I am using them w/ 6AL and have had no problems.

[911Bus]

I instaled the MSD last night and what a difference! The motor came alive, now it's nice and crisp with no high RPM problems.

Thanks for your help.
Geoff.

[bigchillcar]

sweet! great ending to this thread..good to know - the cd box ain't optional!
ryan

[Rex Walter]

Geoff,

Wonderful result!

PS - Can we see more pictures of the bus?

Rex

[911Bus]

Thanks Guys.

If you want to see a few shots from the build up of the bus you can go to this link.
http://www.airspeedparts.com/community-forum/index.php?act=SF&f=20

There are a bunch of broken links from the first updates when it was very rough. I'll get those fixed ASAP.
I'll post a few more finished shots in the next week or so.
Geoff.