Good idea. Will do! Thanks!
Smokin' hot ballast resistor
- Thread starter Laldog
- Start date
Wladek
Well-Known Member
Blue Bosch Coils are for non contact breaking points systems (working with ignition module).
Your old ballast resister show that you have contact breaking point system, so you should look for part
12131357295
I'll just not use my ballast resistor and use this blue one w/the internal resistor.
Wladek
Well-Known Member
Why does dp say no external ballast is needed??
Bosch "Black" coil (original coil on our cars) used a .8 ohm ballast. "Blue" is internally resisited, no ballast needed. "Red" has hotter spark, requires 1.8 ohm ballast. Not unusual for ballast to be warm as it is exchanging heat for voltage reduction but not smokin' hot!
Wladek
Well-Known Member
Ok, i can even agree with this theory, but why all of manuals (i have & blue books) always shows ignition system without contacts with 2x resistors 0,4 & 0,6 ohm (for other cars resistance might be slightly different) as anyway they used different (blue) ignition coil?
Steve is correct. Even through 1975 at least BMW used resistors (in the wire itself) on the 2002s, no blue coils were used, they came along later.
Wladek
Well-Known Member
Ok, it make sense. If you have contact breaker points - use coil with build-in resistor & you don't need any additional external.
But how then interpret the records in the blue book about non breaker points (with ignition module) - is additional double resistor needed if we use blue coil? In blue book photo there is external resistor together with "blue coil" (part number).
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When did the e9 have non-breaker points, 74-75 or?
Wladek
Well-Known Member
I think e9 didn't have it at all (no info in ETK), but e3 have it in later hi-end 3.0Si & 3.3Li. I think in e9 it was only users upgrade, so some cars could have it.
It says never install the Bosch 003 when you have points, meaning it isn't resisted.
Wladek
Well-Known Member
But if you enter full Bosch 003 number in google you will see that this is Blue one, s0 .... isn't it resisted?
The new Blue Coil isn't the same as the original Blue Coil I think.
Wladek
Well-Known Member
So, i assume with every new Blue Bosch coil should be then information what type of resistor was used inside.
No because the resistor is always matched to the value of the coil. So the output of the blue coil will always need the same resistance so they just built it into the coil for convenience.
But if the resistor can get smoking hot do you really want it inside the coil?
When it comes to coils resistance is futile.
When it comes to coils resistance is futile.
Because it is not. But, if you want, you "can" go ahead and buy another ballast resistor,
and even install it, but if you do, it will weaken your spark, which you don't want.
It will also more than double the cost out of pocket for your fix, which I assume you also don't want...
if you ordered the blue coil from Amazon you should have it before the weekend. Git 'er done.
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