Points to electronic ignition GT4

Hello

This must be discussed earlyer, but quick question: What type of aftermarket ignition kit to instal to replace points inside my Marelli S 159 A distributors (twin setup). What Pertronics ignitor kit is suitable? Maybe MR-142 (suitable atlest for Marelli S155P). Or maybe Crane ??

Thanks, Juha

 

I have 2x Crane XR700 installed on my GT4, one for each distributor but you can also use the Crane XR3000 which I believe have a hotter spark and are slightly larger.Here is a description of both,
http://www.kbengineparts.com/craneignition.html

 

Thanks your reply.

Actually, I already have CDI ignition (Mallory) in use. My problem is, that I need to know what specific installation kit is needed to replace points (optical or magnetic pickup) that fits inside distributor without major modifications. Crane systems are coming, I assume, with optical trigger.

Also, my goal isto get rid of the mechanical advance system (and points), and replace them with programmable 3D system, (MegaSquirt) that also takes account manifold pressure when determing current ignitionadvance in partial load situations (partial throtle). Mechanical system relies only for rpm. The MAP controlled ignition timing gives better low end torque and power, and makes driving in traffic easyer. Atleast I hope so..

Thanks, Juha

 

I documented my conversion from pages 12-14.

http://www.ferrarichat.com/forum/showthread.php?t=105874

 

I used Pertronix modules, you can do a search or PM me for more info.

 

Darrell,

Do you have pictures of the setup?

Joe

 

Here is a pic of the installation...
Image Unavailable, Please Login

 

Thanks for the pics and replies. They are wery helpfull.

I think I go for the Pertronics units. I assume, there is no special installation kit availible for our distributors, so I need to make baseplates to attach the pick up unit as shown in the picture. What the pic does not show, I think the ignitor unit uses magnetic picup, or is there attached on the saft some sort of shutter, as was in the Crane system? Thanks for the detailed thread overall, Beta Scorpion.

So, I need to order just the plain ignitor unit x 2 for 4 cyl engine?

Juha

 

As of last year, there was no kit for our application. Be sure that you get (two) 4-cylinder modules for a clockwise-rotation application; I used the MR-142 modules. The pertronix ignitors use magnetic triggers, which are in a ring that goes over the points cam/shaft. Also as of a year or two ago, Pertronix did not have a magnetic ring that fits our points cam, so I had to modify the ring that came in the kit to fit.

 

Darrell
I want to put Pertronix units in GT4. Read from a guy in the group that Pertronix now made units for the 308s. Excited I called Pertronix directly. They said NO they don't make a kit specific. But that if I sent them my distributors they would set each up for $350 each. So much for that idea.

Glad to see your post. I want also want to go your route. At least now I know which kit to purchase. What do you have to do to modify the ring. Do you have a source or schematic for the baseplate.

Please email me so Ican pick your brain and get this set up in my car

[email protected]

thanks
Cal

 

While waiting for the pertronix unit, I decided to lock up the original advancemechanism and temporarely use points to trigger my programmable ignition (megasquirt) and CDI (Mallory). I note, that dual system distributors can be operated with one points and one CDI box. So just the one set of points in other distributor gives trigger to Megasquirt, that calculates the amount of advance, and triggers CDI wich operates the coils. Distributors forwards the spark to plugs. Now I just need to take engine out and put new pistons etc. in. And restore and upgrade everything else also...

Juha