72 Datsun 240z

You are right! Mechanic should get this engine running with pertronix ignitor module 1761, 1.5 coil and 1.5 ohm ballast.

Ill try it! See what happens. Right now we have the pertronix 1.5 coil installed with 1.5 ballast

The thing is my mechanic solved the rough idle and misfire after take off from long traffic by installing an msd blaster 2 coil replacing the pertronix 1.5 coil and 1.5 ballast resistor. The problem is the stock tach does not work with the msd coil which i believe is 0.7 ohms. Going back to the pertronix, the tach worls but the car runs bad.

So what do you recommend? Keeping the 1.5 ohms pertronix and 1.5 ballast resistor i the circuit?

The tach is back in commission connected to the petronix ignitor 1.5 ohms with ballast resistor. Its a shame you cannot make the 1972 240z tachometer work with the MSD blaster 2 coil. Car was running fine at idle and no hesitation or misfiring even when coming out of long traffic jams. Been fighting this problem for more than 11 years and thought this could be a solution. I guess the MSD blaster coil has more power and keeps the spark plugs clean. Any recommendation?

Just thinking if he wired it incorrectly could it damage the tachometer?

I would like to clarify that I dont know the specifications of this msd blast 2 coil. I do know it did solve the rough idle and the misfire issue when coming out of a long traffic jam. Its connected to the pertronix 1761 module installed in the stock hitachi distributor. Just wondering if this msd coil compatible with this petronix module in anyway?

My mechanic finally solved the 11 year old problem by resdjusting the carbs with the temperature of the car during traffic jams, 3/4 of the Temp gauge and an MSD blaster coil. Now he is asking me for a diagram or schematic to get the petronix 1.5 coil and 1.5 ballast resistor running and the 1972 240z tachometer working alltogether. Can seem to find it in the web or haynes manual. Do you have any reference for this? Guess the stock tachometer wont work with the MSD blaster 2 coil.

Let me explain this better. My mechanic is trying to fix rough idle issues when my car is at idle during long traffic jams. He removed the Pertronix 1.5 ohm coil and the 1.5 ohm resistor connected to a Pertronix ignitor 1711 module, and installed an MSD Blaster 2 coil. The tachometer in my 1972 240Z is no longer working? Any ideas of how should i wire this so it brings my tach back to life.

Recently swapped my 1.5 ohm Petronix Coil and 3.0 0hm resistor with a MSD Blast coil with no coil. Car runs much more better and does not hesitate on traffic jams. Problem is tachometer is not working. How can i fix this?

My mechanic replaced a pertronix 1.5 0hms coil and 1.5 resistor coil with an MSD Blaster 2, 3 ohms coil. He got a better spark at idle and car runs much better. The thing is the stock 72 240z tachometer doesnt work any longer. Can someone give us directions on how to connect this correctly so it works as it did?

Ahould i retard the timimg from 20 to 17 degrees and then adjust the fuel mixture in both su carbs? This are my engine specs.

My mechanic really sucks. Look at the way he set my timing. He argues that everything needs to be subject to trial and error. I know i have a schneider 274f cam installed but 20 degrees?

Know this is an old thread. Nevertheless, while checking the su carb set ups and other things, i found out the last mechanic had set the timing as attached. I do have a schneider 274F camshaft. Shouldnt i have 14 degrees the most? I guess my timing is really out of spec. Mechanic set as as shown in the pic. Shouldnt it be lower?