Pertronix ignition on 72
 

Was thinking of changing the stock points on my 72 ,350 to pertronixs , any help or information would be great , will the factory tach still work correctly too ?

Re: Pertronix ignition on 72
 

Pertronix Ignitor [I] and Ignitor II work OK with tachs, but the Ignitor III, because it's multi-spark, does not.

Get a GM HEI. It's more reliable and parts are everywhere. If your Pertronix burns out, you'll need to buy a new one.

Re: Pertronix ignition on 72
 

We have 10 Pertronix modules in original distributors and D100 distributors in use right now.

I keep an extra module in case one goes out, but I have never had a problem.

Re: Pertronix ignition on 72
 

And, yes, all have working factory tachs.

Re: Pertronix ignition on 72
 

I installed the Petronix 1181LS in all my classics stock distributors. Only have factory tach in the 64' C30 and 71' Monte Carlo and they work just fine. Summit part # PNX-1181LS

Re: Pertronix ignition on 72
 

Thanx for the replies guys

Re: Pertronix ignition on 72
 

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I put a Pertronix kit in my stock 327 distributor when they first came out many years ago. (I think early '80's) I have never touched it and it is still working good.

LockDoc

Re: Pertronix ignition on 72
 

The base version of the Pertronix works great. My friend has installed over a hundred of them over the years and the only ones that ever had any issues were the ones with built in Rev limiters. I have several of them in my vehicles none of which have ever failed and stranded me unlike some of the HEI's I have had. For peace of mind I carry a set of points and all the screws to reinstall if I were to have a failure and face being stranded.

I forgot to add that my factory tach works with the Pertronix. It is actually closer to accurate than the aftermarket market HEI that the PO installed in the truck. With the HEI the tach read low about 15%.

Re: Pertronix ignition on 72
 

I have a Pertronix on the 327 in my '68. It has been installed for about two years now, no problems.
I still don't trust it, so I keep a distributor and all the tools needed to swap it, behind the seat where the factory jack used to live.
I used to be a boat mechanic and encountered several DOA pertronix units, so I have trust issues.
The pertronix, so far, is working flawlessly.
The only reason I changed it is it is darn near impossible to find quality parts for points ignitions these days, unless you can find some good NOS parts, it's all junk.

...This discussion is pointless

Re: Pertronix ignition on 72
 

I ran an Ignitor II for about 7 years on the 292 L6 in my '68 C/10. Worked fine for that time, until it didn't. Above 3000 RPM it would shut down. Totally black out. I had to switch key OFF, key ON, kick in the clutch as fast as I could, slow to about 50, then drop the clutch in gear and it would pop start. Usually when on the freeway with some impatient jerk crowding my tail pipes. The engine would coldcrank at speed until I got it out of gear. Worked OK at lower speeds.
I called Pertronix tech help. They said to send the bad pickup module in. I did. Never heard back.
I went back to points for a year, then got a GM HEI.
Yes, I've blown a couple HEI modules since then, but I keep one in the glovebox
and can swap it out in 15 minutes.
Still waiting for Pertronix to get back to me, 9 years later.

Re: Pertronix ignition on 72
 

I put the stock appearing Petronix Distributor # 104600 in my 72 C10 along with the #40011 coil and 7MM Wire Set # 708101 and they were installed in 2015.. Factory Tach doesn't work properly but isn't original to the truck as I changed out whole dash and gauges to a rebuilt I got from a Board Member, PTS70CST.. Bought one of these new tach boards, link, but haven't installed it yet and hoping it'll fix the Tach problem..

https://www.ebay.com/itm/14318007273...53.m1438.l2649

Re: Pertronix ignition on 72
 

I bought the Cajun Tach Shop I6 board and installed it in a non working V8 tach housing. It worked great. I sold the truck before I had a chance to drive it on the road though.

LockDoc

Re: Pertronix ignition on 72
 

I run both, HEI in Otis and Petronix in my 40 because of firewall clearance, never an issue with it. I also ran Petronix on a flathead V8 for many years with no issues.

Just remember you will have to match a coil to it.

Re: Pertronix ignition on 72
 

Ttt

Re: Pertronix ignition on 72
 

I recently installed on my 68 C20, all good.
I've also has one in a '67 Camaro for years, been fine.
One word of advice (and sadly I ran into this) ...DON'T forget to turn your ignition OFF. I now am in the habit of just removing the keys. If you do leave the ignition ON, ...the coil will burst, literally.

Not that you haven't figured this all out, but me being detailed (anal lol ) I put some notes together. Here is a link, there are a couple other notes in the same ImageEvent album.
https://imageevent.com/hvclassics/au...=0&y=1&z=2&l=0

Re: Pertronix ignition on 72
 

That's an issue with the Ignitor [I] only. The Ignitor II will not burn out.