dukenukemx

Can my 85 32V 928 use 87+ coils? They are very common and that's why I'm wondering? Like these ones for example? PartsGeek also shows similar coils. Pelicanparts thinks that 85+ 928's use the same coil.

https://www.partsgeek.com/catalog/19...tion_coil.html

https://www.pelicanparts.com/catalog...ELIGNT_pg3.htm

https://www.ebay.com/itm/18560821584...Bk9SR4yjvKH5YA

https://www.ebay.com/itm/27047043475...Bk9SR4yjvKH5YA

https://www.ebay.com/itm/18560500554...Bk9SR46jvKH5YA

Mrmerlin

I would suggest that you purchase used coils from 928 INTL as they seem to have a better track record of working than the new coils do.

NOTE make sure to match the coil to your coil wire connection, as the later coils have different connections.

GregBBRD

Yes.

Mark Anderson

If you can find new coils good for you. I have been selling lots of used ones ( we test them first)

GregBBRD

I think our parts suppliers got spoiled by not having to keep inventory on pieces like this....
As the supply network has gotten "tighter", the ability to get an order in the morning, call IMC, SSF, or Worldpac right away, and getting parts to ship that afternoon, has greatly diminished.
Yeah, not needing inventory, marking things up 30 to 100%, and selling them the same day, was financially great.
But it's a new world....changed dramatically, from Covid.

I've kept large boxes full of pieces, like this, for years and years....for my own use on clients cars.
I rarely need to order anything to any job. When it's Friday afternoon and we discover that we need an ignition amplifier or coil (or anything else) in order to finish a car....we have that part.
And when it became very obvious that Porsche was going back to Bosch (and Sachs, and others), having pieces remade for their own use, with the premise that Bosch no longer provide these "exclusive" pieces to the aftermarket suppliers, this really started to make sense.

Invest in the stock market two years or more ago?
Or buy Porsche 928 parts....
Guess which one is going to do better?

dukenukemx

This sounds ominous. I know there's a parts problem with either lots of crap or lack there of. Also what do you mean match the wire connections? Aren't they labeled positive and negative?

SwayBar

The posts on the coil are different sizes.

Landseer

About halfway down page 61 of the 135 page 1985 USA Service Info Tech document on CD1 of Morehouse collection, Porsche states that the coils for new 32V car type 944 Identical.

Maybe that will help expand your search universe. At least for hunting used ones. As Rockauto shows a series of 5 brands.....all out of stock.

Seems a conspiracy.

Mrmerlin

the early style coil has a socket type connection thus the coil wire end must have a barb type to fit this socket .
The later type has a sparkplug tip with the screwed on end removed type.
so neither one of these coil cap parts are interchangeable.
Just make sure you get a coil wire that matches the coil you have
NOTE some types of coil wires have screwed on ends and the ends can be unscrewed to fit either type of coil .
Generally unscrewing the end caps of the coil wire increases the chance of damaging the internal wire.

Bulvot

In a pinch, Standard Motor Products UF48 is supposed to work. RockAuto has them, as does Amazon and eBay:

https://www.rockauto.com/en/moreinfo.php?pk=47841&jsn=3

davek9

Does the dust cap fit these or are they too thin? The top looks like it has the same wire guides.

Thank you,

Dave K

ROG100

We just got in 10 new 944 602 115 00 Bosch coils - 944 602 115 00 - they fit 84 to 86 ROW 16v & 85 to 88 32v.
They do fit 89 to 95 but as has been said you need different coil wires - yes we even stock the coil wires.
We have a 1500 sq ft Mezzanine stocked with parts.

dukenukemx

I was under the impression that different coils respond differently and might make the car run bad. I'm not too worried about physical connections.
Wish I had known this sooner as I ordered a Bosch coil. Only one, so if I need a second then I might consider this one.
My dust cap is missing. Did anyone design one so I can 3D print it? I don't wanna design one if I can avoid it.

systemsc

Here are coil values for some typical Porsche coils; https://www.systemsc.com/diagnostic.htm

Typical Ignition Coil Values

Bosch TCI (911 black/silver) - R(primary) = .70 ohms, R(secondary) = 6200 ohms, N = 90,
L(primary) = 3.6 mH, L(secondary) = 30 H, ~ 60 mjoules @ 6K RPM - 6 cylinders TCI
Bosch TCI (944 black/silver) - R(primary) = .70 ohms, R(secondary) = 3100 ohms, N = 50,
L(primary) = 5.8 mH, L(secondary) = 15 H, ~ 70 mjoules @ 6K RPM - 4 cylinders TCI
Bosch TCI (928-32V black) - R(primary) = .53 ohms, R(secondary) = 5700 ohms, N = 100,
L(primary) = 2.6 mH, L(secondary) = 24 H
Bosch Blue Coil - R(primary) = 3.5 ohms, R(secondary) = 8800 ohms, N = 65,
L(primary) = 12 mH, L(secondary) = 50 H, ~ 30 mjoules @ 6K RPM - 6 cylinders TCI
Bosch CDI (small black) - R(primary) = .30 ohms, R(secondary) = 700 ohms, N = 78,
L(primary) = .20 mH, L(secondary) = 1.2 H
Bosch CDI (small silver) - R(primary) = .70 ohms, R(secondary) = 720 ohms, N = 63,
L(primary) = .40 mH, L(secondary) = 1.6 H
Bosch TCI (Porsche 993) - R(primary) = .70 ohms, R(secondary) = 8200 ohms, N = 90,
L(primary) = 3.1 mH, L(secondary) = 25.3 H
MSD Blaster (8202) - R(primary) = .9 ohms, R(secondary) = 5300 ohms, N = 98,
L(primary) = 4.5 mH, L(secondary) = 43 H
MSD Blaster (8222) - R(primary) = 1.1 ohms, R(secondary) = 4700 ohms, N = 95,
L(primary) = 4.2 mH, L(secondary) = 38 H
Perma-Tune - R(primary) = .90 ohms, R(secondary) = 10000 ohms, N = 125,
L(primary) = 4.7 mH, L(secondary) = 74 H

dukenukemx

Got the new coil and installed it on the drivers side and it certainly drives smoother. The reason I changed it is because I noticed that when I unplugged any one of the wires on the drivers side distributor the car would stall out immediately. Put this new coil and that stopped happening. I think I should replace the passenger side just to replace 37 years old coil. If I can't find another Bosch coil then I might go with @Bulvot link.