pertronix ignition

I am switching to an older style distributor with a smaller cap, Then I got a new MSD Coil and it stated that if you have a distributor with points you needed a Ballast resister, rated at .8 ohm. So then I figured well I am updating to an electronic system with the pertronix 1181 unit so did the need for a ballist resister still exsisit.

So I was going to install a pertronix 1181


Well i called pertronix after reading the instructions on the 1181 it states that you must run a ballast resister rated at .7 ohms and that if you leave the ing key on for more than 30 seconds it could burn up the unit.

I then found out that they have a new model 91181 that solves these problems, that you do not need to run a ballist resister and that leaving the key on does not affect the device it has a automatic shut off.
Quote:
Features
Ignitor II systems develop up to 4 times more energy between 3000 and 5000 RPM than standard ignition systems. High RPM performance is improved when used with the Flame-Thrower II super low resistance (0.6 ohms) 45,000 volt coil.

• Adaptive dwell maintains peak energy throughout the entire RPM range, reducing misfires while improving engine performance.
• Develops on average 4 times more available energy between 3000 and 5000 RPM, and 2 times more available plug voltage.
• Peak current level is reached just prior to spark for maximum energy without the heat build-up, increasing coil and module life.
• Adjusts spark timing at higher RPMs to compensate for the inherent electronic delay.
• Senses startup and develops more energy for quicker, easier starting. Built in reverse polarity and over current protection shuts down the system, preventing component damage.

Just thought that some of you might want to know this info.

Otis