What do you guys think in regards to running one on an EVO? Does it really improve anything? Mileage, vibration, power????

 

I chose "door #4" but will add -
Having switched mine, and making no other changes whatsoever, mileage, starting, power were totally unchanged. However, at low cruising speeds, say 35 - 60, it was a totally different engine, even sounded different. Much smoother in every way...

 

So was it different in a good way or do you miss the old EVO sound?

 

It was ALL good

Switched out the ign because of ocassional erratic timing readings, even after verifying the VOES was properly grounded. I'd heard and read it'd make one smoother and I understood the explainations but was mildy shocked when I actually felt the difference. As far as sound, I noticed little/no difference after a few miles, just "at the moment" it was smoother too. Can't describe it any other way... but no, no life changing difference in the exhaust.

Addition; Just read the NightRider article and agree. I changed the entire OEM set-up to a nosecone version, adjusted the timing (static), per instructions and the coil for single fire - same plugs, 18 year old wires, no carb adjustments, no other changes.

 

i have more than a few friends that use the dyna ignition and swear by it...whole lot more to play with as far as adjusting for cams,heads,bog bore/stroker kits

 

I was thinking of switching from dual to single fire....
I decided to go with a SE module [32596-96] and SE coil.
I also changed out the plugs and wires, and it made a noticable difference.
Here's what Nightrider has to say about the subject.....

http://www.nightrider.com/biketech/h...ionmodules.htm

Not saying that either is superior to the other, as some claim.

If so, I'd like to see the proof [before and after dyno sheets]
on the exact same motor....

 

I totally agree and can feel that my engine is smoother on single fire than is was on dual fire. I initially was using the SE module, SE dual fire coil and SE plug wires. After modding the engine, went to a Dyna 2000 module on single fire, single fire coil and Accel wires using the factory nosecone pickup. Made alot of other changes at the same time including the cam profile and Super E jetting.

Maybe it's me, but until the bike is fully warmed up, she sometimes sounds like a cylinder is cutting out or missing a bit. After she is completely warmed up the engine does not miss a beat. Could have more to do with the cam profile and the fact that I never use the enrichener when first starting the bike.

 

I once switched from wasted spark to single fire on a 93" Shovel and felt no difference at all.

 

I was told by an Andrews rep that my bike is stock single fire. His words were " all twin cam engines are stock single fire". So what is the truth?

 

Welcome to HDF. These guys are talking about Evo big twins, which came before twincams. Your bike is a Sportster and much later, made alongside twincams. So you are right and so are they!