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Old 02-23-2011, 02:49 AM   #1 (permalink)
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High Performance Coil Question

I have a 95 Anniversary Fuel Injected Ultra Classic and would like to add a high performance ignition coil..Anybody know of one that will fit this bike? part numbers?
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Old 02-23-2011, 04:45 AM   #2 (permalink)
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You will gain nothing by changing the ignition coil.
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Old 02-23-2011, 06:56 AM   #3 (permalink)
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You will gain nothing by changing the ignition coil.
So your trying to tell me that more spark dosent help with easier starting,smoother idle,better throttle response,better gas mileage? Its all a myth? Hmm wander why they even make them?
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Old 02-23-2011, 07:30 AM   #4 (permalink)
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To get your money.
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Old 02-23-2011, 08:18 AM   #5 (permalink)
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To get your money.
Well i may be new to the Harley scene but have been doing mechanic work on autos for about 15 yrs,stock and performance.And have first hand experience that upgrades to the ignition system even if its only the coil does help..Maybe the ones ya'll have experience with or if you even do may be junk to begin with.
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Old 02-23-2011, 09:58 AM   #6 (permalink)
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A good coil never hurts, Try Twin tec, Dyna or Compu Fire
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Old 02-23-2011, 05:33 PM   #7 (permalink)
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Quote:
Originally Posted by 07superglide View Post
So your trying to tell me that more spark dosent help with easier starting,smoother idle,better throttle response,better gas mileage? Its all a myth? Hmm wander why they even make them?

Don`t confuse an aftermarket ignition system upgrade with a simple coil change.

An aftermarket system can give the advantage of better advance curves etc. Which can certainly give you performance improvements.

However, an aftermarket coil will give you no better performance than the coil already on the bike (assuming it is working properly).

Don`t be fooled by advertising for a coil that produces 87 gazillion megawattvoltjoules.

For example, lets`s say your spark plugs require 20,000 volts to fire. The energy in the coil will rise until it reaches sufficient voltage to cause the spark to jump the gap, 20,000 volts. The stock coil in your ignition system is already capable of producing more than enough voltage to fire the plugs.

Now slap on that fancy expensive aftermarket coil.

Now when the engine is running, the voltage in the new coil will rise until it reaches sufficient energy to jump the gap at, you guessed it, 20,000 volts.

I`ve been an aviation mechanic since 1974. I was taught this in Airframe and Powerplant school by an old man that seemed to know what he was talking about.

The answer to your second question, see Jerry`s post.

Last edited by Dan89FLSTC; 02-24-2011 at 07:37 PM.
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Old 02-23-2011, 07:16 PM   #8 (permalink)
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The stock Evo coil works very well as a matter of fact so does the SE ignition plug in box in that system. I had nothing but trouble when I went with the "best ignition system single fire vibration eliminator awesomest ever" thingamabob setup. The standard dual fire(the SE coil is fine if your old one takes a dump) with just the SE box is damn good, if you're worried that your coil may be less than optimum, buy a new one, the old one will never go bad when you carry a new one as a back-up.
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