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Old 09-13-2020, 04:05 PM   #1
Turbo'd 24erty4er
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Location: Vancouver,B.C., Canada
Default Bosch red super coil in 940T

I have one of these and thought of using it in my 1994 945 T but not certain if it is really much better than the stock black coil.

I know the use of a ballast resistor is a requirement when used with points but is it safe as is with the electronic ignition system?

I have not found much information about this which is why I am trying to find out. It would look nice of course but only if it is compatible.
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Old 09-13-2020, 05:44 PM   #2
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It's not needed.

The standard coil is more than good enough
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Old 09-21-2020, 04:58 PM   #3
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Location: Oregon

it will kill the coil eventually, something about the difference in dwell.

at least thats what was explained to me when my stock lh2.2 volvo killed a brand new blaster 2 in 2 years. i threw the old stocker in and its still running on it fine after 6 years.
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Old 09-21-2020, 06:24 PM   #4
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I believe Bosch Super Red requires ballast resistor which is only bypassed during cranking. Feeding 12V continuously will make it fail sooner.
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Old 09-21-2020, 10:05 PM   #5
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Spray paint the stock coil red. Cheaper, less issues, more power!
88' 740 GLE Wagon - B230FT, T5 Trans, MSII-extra, G80, 3" T->T Exhaust
- - > Project Thread < - -
My new project - 1990 740 SE Wagon
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Old 09-22-2020, 03:13 PM   #6
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Join Date: Jun 2002
Location: S NJ, a suburb of Phila.

I tried one on my 82 turbo. With an added ballast resistor because the unit requires 1.8 ohms for ballast and the stock ballast is .9 ohms. My car did not run as well as with the stock kjet coil which I ended up putting back in. But not before the red coil overheated and started leaking oil and also killed my ignition box.
1982 242 turbo. 338k miles. MVP coilovers and 3" exhaust. Flowed 405 with a V15. Cossie turbine housing with upgraded compressor housing. 90+, IPD remote oil filter. Some other goodness, too. Been lots of fun over 25 years. Restored in 2k. Now ready for a 2nd restoration.

1993 245 Classic, 430k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.
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