do these actually work or is this just marketing hype?

 

i have run them for a few years first with new pipes and a/c and it did seem to cure the poping on decel the bike now has cams pistons and head work i still run the torque cones no scientific proof that they are of any benefit but my common sense says leave them installed

 

They work if you are using an open exhaust of some type. Either straight drag pipes and even some of the early Screaming Eagle pipes.

I had to install them on my wife's '85 FXEF to prevent a flat spot in acceleration and popping in the exhaust on deceleration. This aids in tuning the carb. As you may know the backfiring through the carb or pipes are two of the "tells" on what to/how adjust the idle mixture screw.

Anyway they are cheap enough, get the ones from Dennis Kirk they use to be the least expensive. Mine disappeared when I sent the engine in for HD overhaul.

 

They may well help with driveability issues, but there were no appreciable HP / TQ gains on a Dyna I had on a Dyno when they first came out.

 

You dont want to restrict the exhaust at head it should be at end of pipe for best performance

 

Cones are a myth as far as my experience.

 

Dyno tests show they do not work...lollipops on the other hand do work....and they are cheaper

http://harleytechtalk.org/htt/index.php?topic=20876.0

http://www.nightrider.com/biketech/e...m#dyno_results

 

You'd be better off getting some quality baffles like from Big City Thunder.

Had em' on my softail and it was like a 2-1.
I kid you not.

 

I would run the big city baffles way before the cones , had the BCB's in my 03 E Glide wow great power & sound over the cones ,I ran the true dules & gutted 3in stock Mufflers / 3 in straight pipes , a buddy made his muffles like mine & put the cones in what a difference in power & sound , so he ordered the BCB;s

 

interesting replies

the theory of anti reversion does sound good and the only person I know who has tried them was very impressed

running a 2 into 1 with a bubs silencer (if you can call it that its very open)

not interested in either sound or noise, just want better mid range power