Try 4500RPM /60= 75RPS
75RPS x 8cyl/2 for 4 stroke =300 ignitions per second

 

That coil is a "licensed" repop, that has nothing to do with Delco other than a licensing fee was paid.

 

But original poster does not have a “factory points distributor”, he has a transistor ignition distributor and needs a TI-compatible coil.

 

If you plug in the GM part # 1115263 which is the correct coil for a 69 TI system, Rock Auto shows under GM Restoration Parts the Standard Motor Products coil, just paint it black.
https://www.rockauto.com/en/parts/gm...tion+coil,7060

 

How long until everything is a "repop", "reman" etc. until there is nothing "original" left.
We keep on buying the crap, 2-3-4 times to find one that works. It's just more profit for the sellers... and they know that is what we have to do.

 

OP
stab in the dark
is coil mounted in Original position ? near-vertical, atop intake ? (oil-filled ign coil may fail if not)

 

DO NOT use any coil unless it is a GM t.i. coil. The aftermarkets are junk. The so called licensed reproductions are junk. Find either a known good used or n.o.s. (not likely) GM coil. Aftermarket coils blew out 3 t.i. modules in a matter of seconds in my t.i. L71. I bought a used one from Dave at tispecialties. It wasn't cheap, but it is still working.

 

Comes with 3 yr warranty. There is also a UC12 and UC12T. They are lower cost SMP coils and unsure where they are made. IC12 is Napa's version supposedly made by SMP but have not verified that.

 

Modern warranty....

If the part fails, we'll send you another one.....just like it......... (that doesn't give me a 'warm & fuzzy' felling...)

 

FWIW. AC Delco is no longer a manufacting company. Have not been for awhile now. They are now a MARKETING CO. As long as a manufacturer meets the minimum spec requirements and pays the licensing fee ANY company can put their part in AC box. I've been a tech for over 30 years and watched as what was once some of the highest quality parts in the world become some of the worst. It's a shame.

 

Not quite true. GM still does 'cover it's a$$' with contracts and specific quality requirements (on paper). I'm sure that initial production from any foreign factory must pass 'muster' to some degree. I doubt that GM has the resources to do any performance functional or reliability testing of these licensed items, but I believe those legal obligations keep the makers from sending out complete junk to them....like they are willing to do to smaller vendors. And I'm sure that the 'junk makers' aren't even willing to jump thru the legal hoops that are required as a provider for GM labeled parts.

 

Maybe there is an arc over occurring somewhere that is damaging the coils? Try running the car with the hood up in the dark and see if you see any flashing.

 

What stuff are you seeing in the link that are incorrect......I am curious......I know my ignitions but the numbers I can't spout off the top of my head.

Jebby

 

yes stock mount sitting upright, beside distributor, within ignition shielded box

 

ill try this thanks

 

update, i spoke to dave. He says hard to say if coil or perhaps amplifier. he confirmed the delco coils are the same as chinese with exception of the ones he buys from his vendor in Indiana that used to provide parts to GM. He talked them into making a run of them last year. His are oil filled Delco no shortcuts, to spec. Considering the work involved in replacing the amplifier (seems tough to get to) i'll try the version from rockauto and see if that improves my situation, before i spend big bucks with Dave to keep this car bone stock. . if another coil *****, i guess i move on to the amplifier?

 

Yes pricey but i agree probably worth it and i plan to buy it once have a better idea of my problem. Basically so far ive learned i have installed nothing but Chinese junk in this car (non-Delco AND Delco alike) from local auto parts or Ecklers. i dont believe i have gotten over 25-30 miles with any of the coils installed so far. i get to my destination and later try to leave and No Start scenario. I'll try the SMP blue streak and see how that holds up, at least theyre cheaper but appear to be American made (I hope) per the website. If i can get multiple trips out of it i expect the next move to be Daves coil. Thanks for your help everyone. Out of town for a week but stay tuned.........

 

Mexico.

 

I'd get some technical info on that coil before I used it. The original TI coil had a high turns ratio to reduce the primary flyback voltage to keep from blowing up the output transistor and its zener protection diode. The later replacement boards have higher voltage capability (higher voltage until breakdown) parts in them, but I don't know the part numbers of those parts to know if they'll withstand the higher flyback voltage from points-type (lower turns ratio) coils.

Just FYI.

 

numbers?


It's not my desire to badmouth anyone (as I mentioned earlier, I've heard mostly good stuff about their products), so I'll just posit that he wrote that page to appeal to shadetree mechanics and non-electrical types. I'm not his audience

But, to answer your question, here are a few of my responses, in no particular order, to some of the items and topics in the link that could have been described differently: (I erased several additional items, as I didn't want this to look like a complaintfest.)

1) In actual operation, a TI coil puts out the same secondary voltage as a points coil. The plug gap and cylinder pressure determine the arcover voltage, not the coil.
2) The collapsing magnetic field makes the secondary voltage. The coil doesn't give a crap if the battery is 6v, 12v, or even 24v.
3) An ignition coil does not operate in a transformer mode. You can't take 12 volts, multiply it by the turns ratio (points@100, TI@150) and somehow get the necessary 10-20 thousand volts needed to break down the plug gap at WOT.
4) The higher turns ratio of a TI coil does not increase the secondary/plug voltage (see #1 above). What the higher turns ratio in a TI coil does is reduce the primary flyback voltage so that the fragile Germanium power transistor (and protection zener) in the original design doesn't blow up the first time you start the engine.
5) Both points and TI systems are voltage and current limited. They both run off 12v and have ballast resistors in their primary wiring circuit to limit the current.

Gotta headache. I'm done.