123 ignition on Classic V8?

Someone discussed it here recently. SEARCH is your friend.

 

Here: https://www.ferrarichat.com/forum/posts/148108665/

 

I recently installed a Petronix Ignitor II on a Ghibli with excellent results. Best to also replace the coil with their recommended Flame-Thrower. I repainted the coil in satin black and placed a Bosch sticker. Everything looks stock.

https://pertronixbrands.com/products/pertronix-91884-ignitor-ii-adaptive-dwell-control-bosch-8-cyl?variant=31797074231332

Ivan

 

I have a Thor ignition on my Mexico 4.2. Excellent solution, the engine runs like a charm and very good right from a cold start....

CU lbird

 

I finally found this website again. http://quattroporte.online.fr/usefull.htm

I thought it might have what you're looking for but I don't think so.
Still, it's full of neat info on QPs and other Maseratis.

 

Pardon the off topic question on your thread Fredric,..

Ivan,

How do you feel about the quality and performance of the Petronix on the 3500/6 engine?

 

I believe there is a chart in the factory service manual that may help.

 

You have a 4.2 liter V8 in your Qp1 so why not look in one of the other cars which used that motor like an early Indy or Mexico?

 

You can download various manuals here. https://en.maserati-club.net/manual_download.php?id=80

I bet one of those has the definition of the advance curve.

 

Some years ago, a fellow F-Chatter, 3500 GT owner was hesitant to send his distributor to Pertronix from Europe. Since I live in California, where Pertronix is located, and had dealt with them before on other applications, I served as the initial test & set up. I also had a spare distributor!
It's been running trouble free for years now. In fact, the car still has the original spark plugs installed from my initial fire up & dial in, which was after a 30 year slumber. I used color tester to dial the freshly rebuilt carbs (from Pierce), and have been driving the car ever since.

 

The Pertronix Ignitor I recently installed on a Ghibli only replaced the dual points. The advance curve is still dictated by the original distributor.

I am not familiar with the 123 ignition but it sounds like you are replacing the complete distributor. Since Maserati later used a Bosch distributor on the same 4.2 liter engine you have then logic dictates that the Bosch advance curve will work just fine on your engine and that is what the folks at 123 should use.

Ivan

 

FYI That link doesn't work.

 

Good luck and I hope that's enough for them.

 

You should provide them a copy of the actual curve as they will need to know when advance starts, the rate it increases, and when it stops (goes flat).

Ivan

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The really neat advantage of this solution over the Pertronix is that he can control/alter the advance curve electronically so no more centrifugal weights and cams. Everything that wears out on the classic Marelli. I wonder if Pertronix will ever get there?