Boyesen X-Wing?

[mik_str]

Take a look: http://boyesen.com/xwing-vtwin

In looking through their offerings, they make one in 48mm size: http://boyesen.com/power-x-wing-5.html

Thoughts? Comments?

[lloydie]

Wouldn't fit the velocity stack is in the way !
I do like the idea

[mik_str]

Not sure about the fitment problem..... depending on how thick the collar part is, the stack could sit on it as it sits on the carb throat (may have to trim back the fin protrusions a bit so they don't catch in the slide)....

[lloydie]

You would also need to trim the stack down as it sits 20mm ish in side the carb .

[mik_str]

and that 20mm is precisely where the Wing would sit. depending on how thick the "rim" part is, the stack could sit on it rather than the carb lip itself (would likely have to do some finishing (ie. sanding) to get a nice transition). One would only need to use longer bolts for the stacks (it would effectively lengthen the stack by the thickness of the aforementioned rim......)

could be interesting to try......

[AMCQ46]

Or you could modify the wing to be integrated with the stacks, by removing thevretaining ring and bonding the wings further up the trumpet. Then you don't have to shorten it to avoid the slide and you don't cut the 20 mm off the stacks.


But more importantly, why were you reading up on Harley tuning mods?

[8541Hawk]

Well I'll be the one in the "other" camp......

I can't see how this would boost power in anyway.

Leaving out my opinion that the air flow through the velocity stacks is clean enough, the issue I see is it takes up space or volume in the intake tract.

So no matter what it does to how straight it makes the airflow it restricts the airflow due to the fact it takes up space to exist.

So, to me, less airflow is less power.

It reminds me of the "cyclone" devices that were a rage for cars around here a few years back.
Then the gimmick was it "swirled" the air so the air\fuel mix was better..... and guess what after a while it was shown they did nothing or lost power on a dyno.

But then again I'm just some guy on the 'net..........

But is someone wants to be the Huckleberry.... then I would love to see the dyno charts.

[mik_str]

But more importantly, why were you reading up on Harley tuning mods?

Funny you should ask that...... as most OCMD projects of mine, it is the result of a tangent..... You see, I started here: http://www.cycleworld.com/2014/01/24/as ... ake-sense/

This led me to do a Google search on streamlining carb butterflies and one of the links was for the Boyesen site......

Fear not, I will go to my grave hating Harleys.......

[VTRDark]

I love the way the internet takes one off on a tangent. You never know what you may find that you would not have otherwise. I got to admit (hands up) I look through a fair bit of Harley stuff. My excuse is that they have similarity's in the sense of being a V Twin Some of those Harley guys do some serious mods, engine work, I guess they have to with a Harley

As far as this discovery goes I couldn't say if it's hocus pocus or not but would be vary wary. They don't show any Dyno print outs even though they say there is a marked improvident. This raises my suspicions. Interesting all the same. I would like to see some real world tests/3rd party reviews. Not sure I would want to be the Guinea pig though.

There's been so many devices and things over the years that are supposed to give an increase in power, better fulling etc etc. Some are genuine and some are totally crap/gimmicks that play on a kind of placebo effect I suppose.

I've been doing a lot of reading up on Somender Singhs head grooves. Here's some more on it as that site is hard work/incomprehensive.

(:-})

[mik_str]

I did a Google serach to see if it was a placebo and seems there are many with proven dyno results. KNow, however, that ther are many, many sceptics whenever the issues arises in a foum, but there are some apparently valid dyno results (including some media tests listed on the Boyesen site). In thend, the only way to know if it would work on a VTR would be to try it......It's not in my immediate plans, but such things have a funny way of ending up in my mailbox.......

[VTRDark]

I shall have to have a better look through their site.

It's not in my immediate plans, but such things have a funny way of ending up in my mailbox.......

That's an illness....OCMD

(:-})

[mik_str]

I shall have to have a better look through their site.

It's not in my immediate plans, but such things have a funny way of ending up in my mailbox.......

That's an illness....OCMD

(:-})

Yessir

[Wicky]

Reminds me of the £99.99 Electric Superchargers lurking on fleabay claiming 15-20 extra horsies...

[mik_str]

Reminds people of all kinds of things..... but it's an XWing, not all those other things. People are naturally sceptical, and that's good (I have been bitten by claims in the pat, so I am well positioned to be sceptical), but I have been doing searches on Google and seems there is info to back it up (granted, much of the info I have found is for Harleys, which do not use velocity stacks). One Harley dealer, who tried it on two bikes, found slight gains in full-trottle tests, but noticeably better gains doing part-throttle (blocked it at 60%) runs (which is what most us do in the real world, I do anyhow). Also, not sure how many of you know about Boyesen, but they are a very credible company with a solid reputation in performance products (motocross bikes, snowmobiles), they are NOT your typical fly-by-night outfit....... which is why I am interested in this thing.... I too remember the Swarup and other such snake oil contraptions......

I should perhaps specify that my interest in this is not for top-end, but for low and mid response and torque.... which is precisely where it seems to provide benefits (as per Hog dealer's tests referred to above).....

[mik_str]

Here is the test I referred to:

"Yes, I did do back to back dyno runs with and without the X Wing on two different bikes ('04 FLHT mild 95" and '02 Dyna 88" stock carbs). Very closely tested with engine temps identical and multiple runs.
I found no improvement in wide open throttle power. You could overlay the before and after dyno pulls and almost not know there were two on the graph.
The '04 FLHT was first, and after the WOT runs, I figured "snake oil" as has been said. BUT........ after the WOT runs on the Dyna, I made a throttle stop for the carb and did some part throttle runs to see if there were any gains to be had during regular street driving (where people would claim more "throttle response"). To my surprise, the X Wing resulted in close to 3 horse and 3 lbs. torque at part throttle.
Ater that, I reinstalled the Wing on my '04 FLHT for some street testing and the bike does feel snappier and I'm getting 8-10% more gas mileage. I'm keeping it on. I did not change any jets.

A little more on the Dyna test; The bike is owned by a friend who works for Thunder Press. The deal was for me to do the free dyno testing for an upcoming article in Thunder Press about the X Wing. I would get the free press recognition for the tests. Well, I guess my results were not as spectacular as they wanted, so, lo and behold, when the article came out, someone else had tested it and found more power and torque at wide open throttle! Hmmmm, guess I must have missed something........... TWICE.
I do like the product however, and I'd toss it out if it didn't work well on my bike.

Keep in mind that on all these before and after test dyno runs you see in magazines promoting some miracle product, that if you run a bike for five minutes on a dyno and do a base run, you'd probably get more power without doing anything at all if you just kept warming up the motor, trans, and primary with additional runs (you know.....like after you install the new product"

and here is the link: http://harleytechtalk.org/htt/index.php?topic=2264.0