Twin Fire vs Single Fire Coils?
- Thread starter LamboV12
- Start date
Some say there is no difference but knowing that a coil has to saturate prior to firing I would think that the single fire is better especially when it's doing it a thousand times a second.
But as you say BD and HD and a lot of others had dual fire for years with no problem so who's to say.
I will be doing the dual coil set up that some have done ensuring that I have the sharpest spark available.
My 2 cents,
Ray
But as you say BD and HD and a lot of others had dual fire for years with no problem so who's to say.
I will be doing the dual coil set up that some have done ensuring that I have the sharpest spark available.
My 2 cents,
Ray
lee
Well-Known Member
Lone Dog
Motorcycle Junkie
Lee has it:
Dual fire ignition systems fire both spark plugs from a single coil at the same time. The majority of the spark energy goes to the cylinder under compression while a small portion goes to the cylinder on the exhaust stroke causing a small wasted spark. Single fire ignitions separate the firing pulses, only firing the cylinder under compression. The main advantage of dual fire systems is simplicity and low cost. The advantage of single fire systems are smoother engine operation and the elimination of the popping that sometimes occurs when long duration camshafts are used. There is no horsepower advantage with single fire ignition systems.
Dual fire ignition systems fire both spark plugs from a single coil at the same time. The majority of the spark energy goes to the cylinder under compression while a small portion goes to the cylinder on the exhaust stroke causing a small wasted spark. Single fire ignitions separate the firing pulses, only firing the cylinder under compression. The main advantage of dual fire systems is simplicity and low cost. The advantage of single fire systems are smoother engine operation and the elimination of the popping that sometimes occurs when long duration camshafts are used. There is no horsepower advantage with single fire ignition systems.
