Yep, that's what you get with wishful thinking and buttometer reading.

In actuality, anything you do with your narrow-band O2 sensors can affect only the closed loop mode. Closed loop mode is used for idle and it extends to cruising at relatively low speeds. When more power is needed ECM switches to canned maps and whatever you did with O2 sensors is ignored - as in "not used".

 

don't waste your $ on the x14. it does not provide enough extra fuel [6% i think] to make up the difference in the lean out. i talked to the mfg about the x14iED [which is adjustable] he felt i would be wasting my money because he stated his product WOULD NOT enrich enough to make the difference with the aftermarket pipes and a/c. he suggested i find a used stock exhaust!
its interesting that different owners have given different reviews on this product.

 

Thanks for this thread. I was considering the X14, but it looks like with Bassani sweepers it would not be a good choice.

 

im using ViEDs on my sporty and as far as i can tell it runs alot 'nicer' [technical word] than it did stock.

Also Nightrider stand behind their product 100%, as i have just found out when my dog ate the front one off my bike, along with alot of the wiring loom.

 

i got xied's on my 2011 iron...no decel pop and wayyyyy smoother throttle response

I myself was about to buy a fuel pack from the HD dealer in Oakland....he really told me not 2 waste my money on it and remoended just a simple remap or xied's

 

Guys,,Hi flow air filters and aftermarket BAFFLED pipe sets n slip on's,,
The Xied's will Get er done just fine.
If you go Inside the engine,,start going stage two,,cams,,etc
You best find a good dyno man.
Remember ALL the Xied's do Is fool the 02's Into telling the ECM to richen up
In Closed Loop only.
When yer at WOT,,or Idle the ECM Is going 'Fat' anyways,,,
But porting heads or changing cams Is a whole different animal,,
Remember:
No Baffled straight pipes are almost not tunable on a stock engine.
They sound fast tho,,,,

 

Hey Osco, I assume Bassani radial sweepers are concidered non baffled straight pipes, correct?

 

I have No Idea,,,Try here
http://www.harley-performance.com/harley-exhaust.html

Another critical point often overlooked Is pipe diameter.
Harley tuned and ported our stock heads for 1 3/4" diameter pipes.
This In conjunction with baffles and that crossover pipe hidden on the
newer stock systems produces a perfect back pressure wave,,
Stay with me,,
A perfect back pressure wave that Is timed correctly to "Scavege"
gasses from the heads.

People change pipes,,to shorter or bigger radius/Inside diameter
or weaken the resistance, thru less baffling,
and reduce the back pressure wave and scavenging suffers.

What does that do?
De-cell pop,,,or at a worst case level,,really robbing power you will
see flames popping out. If yer gettin flames thats alot of power that
did not go off Inside the engine,,
Alot of hot air,,like me XD

Scavenging removes any unburnt fuel from the combustion chamber
before the exhaust valves close alowing a complete
replenishing of fresh Air and Fuel on Intake.
This Is key to Power
Aftermarket free flow exhaust does make for more power IF,,,IF
Its handled correctly.
Just because It's louder that don't mean It's faster where ya want It
or should want It...
Thats where ya ride...
Extra power at 5,500 RPM's Is useless except at the drag strip.
Extra power at 2,500 or 3,000 or even 4,000 Rpm's Is Like
Good Sex,,
Sad thing Is some never feel It,,no pun Intended

Here endeth the Lesson

 

I looked up the Bassani's
It Said, "Baffles and heat shields not available" at three sites.
That still don't tell me If they are baffled In the first place.
Nor the actual pipe diameter.
As for a shorter pipe system trying to manage scavenging with larger
diameter piping,,, Thats beyond me, I would have to do alot more research.
Pipe diameter changes change velocity big time,,I dont know about
length changes.
If I were to fathom a guess I'd say 2 out of 5 pipe makers don't test for power properly, they just go for sound.

Just by looks I'd say they are all show and no go, prolly sound great.

Gaining performace is harder than you think, 2 Into 1's are often the
Torque kings of the after market world.

 

Yep, larger pipe diameter than optimal is a good way to kill mid- and high-range power. Your engine will simply not produce enough exhaust gases to create required velocity and scavenging effect. I've been there, tried that, loss of power is shocking, in particular if you do racing. Competition will leave you in dust.
Length. Shorter pipe tunes you for higher RPM. Too short pipe leaves you with nothing. Just lots of noise and that's it.