[64-3Deuces]

Been ages since I used points. I see Delco D106P and D106PS. I know there is clip and screw terminals, so my guess is that the "PS" designates the screw terminal. Correct or no? Any advantages of one over the other? Thanks.............................

[John V.]

No expertise here but you are right, the D106P was the type used in Production with the spring type terminal for the leads, the D106PS had the screw type terminal.

I would guess that the spring type was used in production just because it was easier/faster to connect the leads.

Not sure when the D106PS was introduced or why it may have been preferred by mechanics for service, I suspect it was not "better" by any measure, just different in the manner for connecting the leads. I found no evidence that it was ever used in production. The D106P is what is listed in my '66 MPC, could be that the D106P was sold for Service by dealers (and used by them for tune-ups) while perhaps the D106PS was strictly sold thru non-dealer sources.

Perhaps in production they also worried about a stray screw jamming up the works. Or maybe it was just cheaper without the screw, the idea that even fractions of a penny add up for the millions of cars GM sold every year.

The better set was the D106HP, designed for high rpm use and a better wear block material plus higher spring tension which perhaps caused more distributor cam wear.

Others have claimed the D112P is better yet but have seen that disputed.

I have also read that Standard Motor Products has for years made most of the branded points, including those sold as Delco.

According to one source, Delco discontinued the D106PS in 1982. Then discontinued the D106P in 1992.

The D112P seems to have been introduced in 1969. Read a good discussion of this point set. It had a lower profile terminal attachment point and smaller footprint overall, the purpose so that it could fit under some sort of shielding that was used on later model distributors. If incorrectly substituted, the D106 units would short against this shielding and not work. The D112P had the same type wear block as the D106P and D106PS, so not as good as the D106HP according to this source who seemed pretty knowledgeable about the various types.

I do not know if any of these alternate point sets got a screw type terminal aside from the D106PS although from what I've seen only the D106P looks to have had the spring type terminal.

Saw a guy selling the D106PS (original p/n 1966289) on ebay for $10.

Another seller had the D106P (original p/n 1931988) on ebay for $139 for a sealed can of 10.

The D106HP (original p/n 1948671) can also be found on ebay.

No idea if any of these are vintage NOS and made to the original specs or later Delco sets that were produced with lesser materials/design.

So it seems the D106P was the style used in production if you want it to look factory correct. The D106PS was used for service but so was the D106P. The D106HP was superior but somewhat different materials and appearance.

[Old Goat Racer]

Examples And a set of Blue streaks

[Tom Vaught]

Optical illusion or did the D112P point set use a wrench to adjust the dwell vs the old allen head cable screwdriver? Looks like a hex head on the D112P points.

Tom V.

[Old Goat Racer]

^^^ Good eye. Actually it is set up for both. Go figure .......

Also it feels like it has a stronger spring than the other two.
I was always told it helped control point bounce at high rpm ?

[War eagle]

Old goat racer does any of those have the hi-po vented contacts? We used to sell them over the counter and I believe were the Corvette part but fit anything V-8 GM. Definitely heavy spring and the hole in the contact allowed the diffusion of heat but caused premature wear of the adjacent contact.

[Old Goat Racer]

If I have to open these boxes one more time I'm going to charge admission. Just kiddin.
Only the Blue point has a hole in the bottom half of the point if that's what your referring too ?

[64-3Deuces]

Thanks to all for the info, that’s what I needed. Plan to use points/cast iron distributor on my never ending 64 day-two period correct resto, though its been ages since gapping the points & setting the dwell.

The car will be a low RPM toy, so regular points will work. I have seen NOS on E-Bay and yes don’t know if that’s the “old” stuff or the “new” stuff Rock Auto has Delco points but in their description they state that it is a premium aftermarket part.

[geeteeohguy]

The 112's were introduced for the high revving Z-28's and Corvettes of the day, originally. At least that's what I read 40-odd years ago. I use NOS 106's in my GTO's with no issue, and also in my '61 Corvette, which has been retrofitted to a '69 distributor for its vacuum advance. No points bounce well past 6000 RPM, so a great choice for the Pontiacs which rev lower in general. The 112 has a much stiffer spring than the 106, at least all of mine do. Currently have about 10 spare sets that are over 30 years old and in the queue to be used as needed.

[64-3Deuces]

geeteeoguy
You confirmed my plans. Based on my intended usage, an keeping the old skool theme, the D106 will work just fine.

[60sstuff]

Always good to have the old vintage OEM type of tune-up parts on the shelf so you can keep these cars running as they were intended.

My 67 MPC shows two points, the spring clip points as #1931988 and the screw type #1966289 as shown below.

Besides the points you could use (if you wish) the D409 Rotor, D308 Distributor Cap and the called for AC Spark plugs.

The Dist. Cap "without the R" has been very difficult to find and expensive. The Corvette guys need this Cap also for the mid-year vettes.

Chris.

[64-3Deuces]

Chris.
Picked up some NOS #1931988 points and correct NOS AC plugs. Have seen a few of the caps you mentioned, a bit above my pay grade ! Shooting for period correct but not concourse bit will Delco. Thanks for the other Delco PNs

[Goatracer1]

I have several Delco point sets that I got new in the 1960's and they all have the spring type connection.