MTFCA Forum

... For his informative new article in the September- October Vintage Ford magazine for his technical know-how write-up for the Heinze coil 2.0- Fixing performance problems with a points upgrade. ... Just received my copy in today's mail.

Thank ya sir! Sorry for delay, just seeing this. I hope it helps Heinze owners. I have been getting great feedback on the coils I rebuilt with the new points. These run very stable and hot.

Kingston High bridge are the next coil points to remake, I’m hoping to have a working prototype by the end of November.

David

Williamston T Works

Woody23 wrote: ↑

Sun Nov 02, 2025 8:55 am

Thank ya sir! Sorry for delay, just seeing this. I hope it helps Heinze owners. I have been getting great feedback on the coils I rebuilt with the new points. These run very stable and hot.

Kingston High bridge are the next coil points to remake, I’m hoping to have a working prototype by the end of November.

David

Williamston T Works

When you say "hot", can you elaborate? I suspect you mean in the amperage output? I recall the K-W's should be set at between 1.2 to 1.3 A, which of course is a fairly small window. Being the consumate "TW Timer Snob" that I am, with excellent lifespan on the little carbon brush of over 4K miles on a brush, likely over 5K, I'm wondering if it's because when I got these coils from the late RV the reason my brushes last so much longer over some other folks I hear about, is because they're not "too hot"? Sadly I don't remember what the amp output of the Heinze coils should be. All I know is I do love them, they're quiet, seem to be able to run forever without "tinkering" (RV once said they seldom need messed with) and fwiw mine are now pushing 20K miles on them.

That article on the Heinze coils is the only article that has made any sense to me in years! Keep it up!

The term “hot” is more of how far the arc will jump an air gap. The larger the gap the “hotter” the spark. Most of the Heinze coils I see are set pretty low. This typically causes cold start issues, inconsistent fire times and is less top end.

There are four different coil packs I see in these coils(see attached photo )and they all behave a little differently. So setting a set all the same amp draw does not mean they are all running the same. There is a lot of finesse that goes into these coils to get them to perform at their full potential.

So tuning is much more than just installing new points and setting the amp draw. That is an entirely different story.

In my research I found the reproduction points to be too stiff to perform to their full potential when you look at idle to flat out. I also discovered the some of the Heinze coils had the adjustment knob set back further so the points were loosing a lot of the adjustment control due to the gap. It will make more sense once after reading the article.

These new points perform very well at all speeds and a second point was made to fit the other style tops.

A lot of people don’t run Kingston of Heinze coils because they don’t trust them or not happy with their performance, so that was my motivation to find the issues with these coils and correct them.

I have remade the Kingston low bridge and these ‘11-13 Heinze points and they now run just as well as KW points. My next set is the Kingston High Bridge. It’s pretty time consuming and a bit pricey to make the prototypes but as more people start to use them and see the difference makes it worth the effort.

The goal is for owners to be able to enjoy their cars without having to rig KW coils into Heinze or Kingston boxes. This project makes that more feasible.

Happy touring!

David Woods