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BauerR · Joined: 13 Apr 2022 Posts: 10 Location: Baltimore, MD

Hello all.

Looking to replace an original (42 y/o) ignition coil on a US '81 S2.

Wondering if there are any upgrades exist?

Thanks
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996 Turbo ('04)
928 S4 auto ('89)
928 S4 manual ('87)
957 Cayenne Turbo ('09)
931 Turbo S2 ('81)
951 Turbo ('87)

chuck21401 · Joined: 20 Feb 2005 Posts: 527 Location: Annapolis, MD

I think the coil in my car was sourced from Autozone, and works fine. I’ll take a look.

Edit: The coil in my car is an Accel Super Stock Coil 8140. Not sure it’s an upgrade but works fine.
https://www.holley.com/products/ignition/ignition_coils/street/super_stock/parts/8140
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1981 Porsche 931 w/S1 engine & g31 transmission. Water-cooled intercooler

Beartooth · Joined: 05 Apr 2022 Posts: 206 Location: Roberts, MT

I had a MSD Blaster 2 coil sitting around, so I put that in my car. It runs fine and no issues I can tell, but I haven't put any significant miles on it. The coil that was in it, and I'm not sure it was original, reads in at 1.0 ohm primary resistance, where the Blaster shows 0.9. It's a popular coil for V8 applications; I'm not sure it's meant for six or four-cylinders, but MSD doesn't give any warnings against that in the instructions. Time will tell, but being almost the same resistance tells me it should be ok. Mine's an '80, so it's the old setup with a resistor wire to the coil. If that's the setup you've got, I think any generic performance coil should work as long as it's not one meant to only be run on a capacitive discharge setup. If you've got DITC, then I'm not so sure except to say you could run into trouble if you put something in with too low primary resistance. I do see that they used a different coil with DITC, but I can't find any specs on it.
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1980 931 diamond in the rough

BauerR · Joined: 13 Apr 2022 Posts: 10 Location: Baltimore, MD

Thanks, I have the Blaster 2 on my 951, so def no issues on 4cyl applications.

As far as DITC is concerned, I'll have to look further into that.
Thanks for the feedback
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996 Turbo ('04)
928 S4 auto ('89)
928 S4 manual ('87)
957 Cayenne Turbo ('09)
931 Turbo S2 ('81)
951 Turbo ('87)

MikeDanger · Joined: 21 Nov 2002 Posts: 770 Location: Denver

any new findings here? what Ohm is preferable for S2 DITC?
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It was either this or a giant box of legos

BauerR · Joined: 13 Apr 2022 Posts: 10 Location: Baltimore, MD

I put a Blaster 2 on the 931(S2)
Zero issues
_________________
996 Turbo ('04)
928 S4 auto ('89)
928 S4 manual ('87)
957 Cayenne Turbo ('09)
931 Turbo S2 ('81)
951 Turbo ('87)