Author Topic: 1970 GT500 Spark Plug Removal  (Read 1202 times)

shelbymann1970

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Re: 1970 GT500 Spark Plug Removal
« Reply #15 on: November 18, 2022, 01:01:10 PM »
Gary, you are correct. Under-Cap electronic, MSD Blaster II coil disguised as stock, 8mm Plain black Jacob's wires, plugs were gapped a little bigger. Great system, something I recommend to everybody. Looks stock, much better than points and stock coil.
I like the look at it is non invasive. I'm happy with the performance.
Shelby owner since 1984
SAAC member since 1991
1970 GT350 4 speed(owned since 1985).
  MCA gold 2003(not anymore)
1969 Mach1 428SCJ 4 speed R-code (owned since 2013)

FL SAAC

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Re: 1970 GT500 Spark Plug Removal
« Reply #16 on: November 18, 2022, 01:03:50 PM »
Gary, you are correct. Under-Cap electronic, MSD Blaster II coil disguised as stock, 8mm Plain black Jacob's wires, plugs were gapped a little bigger. Great system, something I recommend to everybody. Looks stock, much better than points and stock coil.

MSD + Petronix  = Stealth and reliable
These cars are meant to be driven so enjoy the hell out of all of it. Not just the look of it when its all cleanCS

A person without a sense of humor is like a wagon without springs.It's jolted by every pebble on the road

Florida S.A.A.C Love All-Serve All, Take Time To Be Kind

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crossboss

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Re: 1970 GT500 Spark Plug Removal
« Reply #17 on: November 18, 2022, 01:53:34 PM »
Gary, you are correct. Under-Cap electronic, MSD Blaster II coil disguised as stock, 8mm Plain black Jacob's wires, plugs were gapped a little bigger. Great system, something I recommend to everybody. Looks stock, much better than points and stock coil.

MSD + Petronix  = Stealth and reliable



Well....not really. Pertronix has had many failure issues. I prefer the Dura-Spark II set up. Its OEM, and dead nuts reliable. Another plus, IF you need replacement parts, its at any local auto parts store.
Past owned Shelby's:
1968 GT-350--Gold
1970 GT-500--#3129--Grabber Orange.
Current lifelong project:
1969 Mustang Fastback/FOX chassis, 5 speed, 4 wheel discs, with a modern Can-Am 494 (Boss 429), Kaase heads, intake with a 1425 cfm 'B' Autolite Inline carb, ala Trans-Am style…Whew!!

FL SAAC

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Re: 1970 GT500 Spark Plug Removal
« Reply #18 on: November 18, 2022, 02:13:36 PM »
20+ years in a 428 on a petronix one unit....priceless  !
These cars are meant to be driven so enjoy the hell out of all of it. Not just the look of it when its all cleanCS

A person without a sense of humor is like a wagon without springs.It's jolted by every pebble on the road

Florida S.A.A.C Love All-Serve All, Take Time To Be Kind

I have a UNGOLD car

crossboss

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Re: 1970 GT500 Spark Plug Removal
« Reply #19 on: November 18, 2022, 02:14:45 PM »
20+ years in a 428 on a petronix one unit....priceless  !


Tony,
You are one of the lucky ones...
Past owned Shelby's:
1968 GT-350--Gold
1970 GT-500--#3129--Grabber Orange.
Current lifelong project:
1969 Mustang Fastback/FOX chassis, 5 speed, 4 wheel discs, with a modern Can-Am 494 (Boss 429), Kaase heads, intake with a 1425 cfm 'B' Autolite Inline carb, ala Trans-Am style…Whew!!

FL SAAC

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Re: 1970 GT500 Spark Plug Removal
« Reply #20 on: November 18, 2022, 02:17:20 PM »
20+ years in a 428 on a petronix one unit....priceless  !


Tony,
You are one of the lucky ones...


I've heard that before over and over....
These cars are meant to be driven so enjoy the hell out of all of it. Not just the look of it when its all cleanCS

A person without a sense of humor is like a wagon without springs.It's jolted by every pebble on the road

Florida S.A.A.C Love All-Serve All, Take Time To Be Kind

I have a UNGOLD car

TA Coupe

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Re: 1970 GT500 Spark Plug Removal
« Reply #21 on: November 18, 2022, 04:12:35 PM »
Sometimes you make your own luck by doing things the correct way which a lot of people using the pertronics didn't do.

       Roy
If it starts it's streetable.
Overkill is just enough.

427hunter

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Re: 1970 GT500 Spark Plug Removal
« Reply #22 on: November 18, 2022, 05:19:34 PM »
20+ years in a 428 on a petronix one unit....priceless  !


Tony,
You are one of the lucky ones...


Scott, the issues you are concerned about with pertronix were solved many years ago (resistor wire voltage), I have run pertronix on every vehicle in the fleet for over 20 years without one failure. They make a great product.
“You keep using that word, I do not think it means what you think it means”

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Jackie Brown


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pbf777

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Re: 1970 GT500 Spark Plug Removal
« Reply #23 on: November 18, 2022, 05:56:25 PM »
     We have also been recommending, selling and using the Pertronix Igniter replacement product or an awfully long time with good results and minimal failures.   :)

     But, one thing you don't want to have happen is to expose them to voltages over 15-16V as that will toast 'em!  So don't blame the Pertronix Igniter for it's failure if your regulator is out of adjustment (you shouldn't be exposing the 12V battery this for any duration either!  :o) or because your applied battery charger is set to a voltage greater. (careful of the "Fast-Charge" & "Boost-Start" modes!)  ;)  But I have questioned why their product isn't designed to tolerate this as it is not so uncommon an event for one reason or another?   :-\

     Scott.
 
« Last Edit: November 18, 2022, 05:58:59 PM by pbf777 »

shelbymann1970

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Re: 1970 GT500 Spark Plug Removal
« Reply #24 on: November 26, 2022, 08:14:38 AM »
Gary, you are correct. Under-Cap electronic, MSD Blaster II coil disguised as stock, 8mm Plain black Jacob's wires, plugs were gapped a little bigger. Great system, something I recommend to everybody. Looks stock, much better than points and stock coil.

MSD + Petronix  = Stealth and reliable
Petronix...I remember when my friend never made it to a show as his petronix fried in his CJ 69 Mach1 on the way to the show. I'm not well versed on after market ignitions but know the one on my Mach1 that Cobrask8 put in decades ago works great and the NOS points I put in my GT350 with the stock 1970 setup still works great more than 2 decades later and has never failed me. Cruising stock is fine. Want more performance then aftermarket might be the way to go.
Shelby owner since 1984
SAAC member since 1991
1970 GT350 4 speed(owned since 1985).
  MCA gold 2003(not anymore)
1969 Mach1 428SCJ 4 speed R-code (owned since 2013)

shelbymann1970

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Re: 1970 GT500 Spark Plug Removal
« Reply #25 on: November 26, 2022, 08:15:58 AM »
20+ years in a 428 on a petronix one unit....priceless  !


Tony,
You are one of the lucky ones...
+1 I have heard too many failures over the years with Petronix but that was MANY years ago(90s). I pass by  a building with their logo on it all the time and wonder if it is them. Wixom Mi.
« Last Edit: November 26, 2022, 08:18:08 AM by shelbymann1970 »
Shelby owner since 1984
SAAC member since 1991
1970 GT350 4 speed(owned since 1985).
  MCA gold 2003(not anymore)
1969 Mach1 428SCJ 4 speed R-code (owned since 2013)

crossboss

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Re: 1970 GT500 Spark Plug Removal
« Reply #26 on: November 26, 2022, 12:02:26 PM »
Guys,
All I am saying is you can take a 'chance' with Pertronix. OR use a reliable, OEM, readily available set up (and parts store friendly) Ford Dura-Spark II. Its your choice. I have been using the Dura-Spark since the 1980s, and NEVER experienced a failure. My worthless two cents...
Past owned Shelby's:
1968 GT-350--Gold
1970 GT-500--#3129--Grabber Orange.
Current lifelong project:
1969 Mustang Fastback/FOX chassis, 5 speed, 4 wheel discs, with a modern Can-Am 494 (Boss 429), Kaase heads, intake with a 1425 cfm 'B' Autolite Inline carb, ala Trans-Am style…Whew!!

shelbymann1970

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Re: 1970 GT500 Spark Plug Removal
« Reply #27 on: November 27, 2022, 10:05:09 AM »
Guys,
All I am saying is you can take a 'chance' with Pertronix. OR use a reliable, OEM, readily available set up (and parts store friendly) Ford Dura-Spark II. Its your choice. I have been using the Dura-Spark since the 1980s, and NEVER experienced a failure. My worthless two cents...
As Dan(Cobrask8) said about my 69 428SCJ "Under-Cap electronic, MSD Blaster II coil disguised as stock, 8mm Plain black Jacob's wires, plugs were gapped a little bigger." I bought his old car off if his ex back in the winter of 2013. I had no clue what the system was on the car when I started putting the engine bay back together. He has a great memory and when I changed the plugs out they were a larger gap(.042 I believe) than stock. All I can say is the car has hookers on it and a stock M carb now and it runs really strong with zero issues with the ignition which I think should be at least 30 years old? I would not have a problem using a petronix if needed but my points system works great on my GT350(351W). When I first started to get the car running after dropping the engine back in it wouldn't fire. A Machine repair friend from work and a big Chevy guy who has done more BBCs for people than anyone I know told me to sand/file the NOS points. Did it and the car fired right up. Always learning then and now. Thanks for your insight on other systems to use. Gary
Shelby owner since 1984
SAAC member since 1991
1970 GT350 4 speed(owned since 1985).
  MCA gold 2003(not anymore)
1969 Mach1 428SCJ 4 speed R-code (owned since 2013)

427hunter

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Re: 1970 GT500 Spark Plug Removal
« Reply #28 on: November 27, 2022, 11:32:23 AM »
Guys,
All I am saying is you can take a 'chance' with Pertronix. OR use a reliable, OEM, readily available set up (and parts store friendly) Ford Dura-Spark II. Its your choice. I have been using the Dura-Spark since the 1980s, and NEVER experienced a failure. My worthless two cents...


Scott, you are disregarding what people are telling you who actually use the pertronix. I know you "heard" some stories that are now almost 30 years old - you need to just let it go. If you don't like pertronix then don't use it, but those of us that actually use it have no reason to lie or steer people the wrong way. It fits under cap, mounts to the original distributor with no mods, and works perfect. The one in my 66 vette is the same pertronix that I installed in 1999! 
“You keep using that word, I do not think it means what you think it means”

Inigo Montoya

“This life’s hard, man, but it’s harder if you’re stupid”

Jackie Brown


2000 hours of my life stolen by 602 over three years