Replacing points with Petronix Ignitor: 1975 280C

[travismcgee]

Has anyone replaced their points on a 1975 280C ( engine: 110.921) with a Petronix Ignitor system and if so do you have the catalog #. I went to their website and there are about a million to choose from. Thanks.

[Arthur Dalton]

Get dist # and use these guys ,,they are the best .

http://www.vintageperformance.com/retrorockets/mercedes.htm

[travismcgee]

Thanks Arthur, that is exactly the info I is was looking for.

[ML75719]

I installed the Pertronix kit on my 72 220. The distributor number on mine was not listed but they were able to identify the correct fitting from a photo.

[hisnibs]

I installed Petronix system in my 73 280C (110 engine). Had to have it professionally done. Works great. Noticable acceleration. Haven't checked gas milage.

[Arthur Dalton]

A Tip fpr you Pert guys,

Best to put a kill sw with the Pert-1 cuz many burn out if left On w/engine Off.

Also doubles as a theft deterent.................

[ML75719]

Originally Posted by Arthur Dalton

A Tip fpr you Pert guys,

Best to put a kill sw with the Pert-1 cuz many burn out if left On w/engine Off.

Also doubles as a theft deterent.................

Do you put the switch between the ballast resistor and the Ignitor?

[Arthur Dalton]

You can.. or anywhere the coil will not get B+ V....
If the reluctor on the Pert happens to be stationary in the trigger position by chance with B+ feed , it is energizing the coil and will burn out. But, if coil is out of the circuit, there is no high Amp draw on the Pert Module.
Very common on the Pert-1 , the Pert 2 has a breaker circuit so as to allieviate that condition, but guys like the performance and simplicity of the Pert-1 better., so a kill sw is the answer. It also comes in handy if you are working on the car and need the key On for testing or adjusting valves, etc without having the key power the Ignition.

And if you hide that sw under the dash, [ or anywhere] you automatically have a theft protection Kill, although that is not the intended reasoning behind the switch..it is just an added benefit.
Some guys also go a step further and use a DPDT sw so they can also add a Blinking Red LED to the switch ....they mount the LED in an Obvious spot in the Dash so any passer-by crooks see you have an ARMED car.
No big deal, but better than nothing...The Led also reminds you when you go to start the car that you have the Kill ON.
Radio Shack has a cheap 12V Blinking Led that has the blink circuit and dropping resistor circuit all self contained, so you just have the 12V +/- to hook up to have LED Warning. Real simple.
Some guys just do the LED ..it does nothing but look like an Alarm..I put one on my Golf Cart....

Don't put the kill before ballast b/c you will still have ign with crank if the car has Ballast By-pass for Start/Crank...........................

[dquance]

When you install it with the flame thrower coil, modify the coil power to bypass the dropping resistors, you get a hotter spark.

Doug Q

[Arthur Dalton]

Originally Posted by dquance

When you install it with the flame thrower coil, modify the coil power to bypass the dropping resistors, you get a hotter spark.

Doug Q

Yes..if you use their matching FT coil, it is already internaly ballast...