Torque cone? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 22 (permalink) Old 07-14-2013, 11:29 AM Thread Starter
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Torque cone?

Has anyone used these? I'm curious if they work well
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post #2 of 22 (permalink) Old 07-14-2013, 01:41 PM
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This is the first time I've seen these things. I know a few years back they had a similar thing that you could put on a cars breather hose/box. The idea is that by redirecting the air flow into a spiral it creates a vortex like condition in the pipping thus increasing air flow. For that matter I think they called the car on "the vortex" lol.

The demonstration they used was 2 bottles taped together with water in one of them. The water didnt flow well when u flipped it over but if you got the water swirling it flowed quickly and smoothly. Water and air both behave in a similar fashion so water is usaly an acceptable analog for air. By puting this theory to work on the exhaust side you are possibly creating a scavenging effect similar to a x pipe.

To me the way it works makes since but the question is, is it worth what their charging to Maby pick up a mpg or a extra poney on the top end.

Keep her rubber side down.
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post #3 of 22 (permalink) Old 07-14-2013, 02:06 PM
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Those were formerly known as velocity stacks, if I'm not mistaken. I've seen it posted here that these carbs don't function well with that one port exposed (forget what it's called), such as having the boot removed or the port partially blocked by using the wrong pod filter. The port is at the top of the carb throat, where the boot clamps on, has an oblong or oval shape, maybe more of a crescent moon, right at 12:00.

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post #4 of 22 (permalink) Old 07-14-2013, 02:25 PM
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Quote:
Originally Posted by Spockster View Post
Those were formerly known as velocity stacks, if I'm not mistaken. I've seen it posted here that these carbs don't function well with that one port exposed (forget what it's called), such as having the boot removed or the port partially blocked by using the wrong pod filter. The port is at the top of the carb throat, where the boot clamps on, has an oblong or oval shape, maybe more of a crescent moon, right at 12:00.
The velocity stacks are installed on the carbs though, these "Torque cones" are for the exhaust system. It's likely a similar concept, but since these go in the exhaust, it doesn't matter if our carbs don't function without the right filter on them.

I never heard of these cones before, so I don't know if they really work or not. Seems a high price to pay for something that can end up being just a visual mod (unless you really like it visually). An ear shave would definitely improve performance and we already know that one does work.

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post #5 of 22 (permalink) Old 07-14-2013, 02:29 PM
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I missed that Ceal, and that's no surprise to me. I wondered why James was talking about the Tornado gadget. Obviously they would have no effect on the carbs.

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post #6 of 22 (permalink) Old 07-14-2013, 02:31 PM
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I am wondering if this is to help create some back-pressure for strait pipes. That's the impression I am getting from the site.

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post #7 of 22 (permalink) Old 07-14-2013, 03:14 PM Thread Starter
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Quote:
Originally Posted by thtanner View Post
I am wondering if this is to help create some back-pressure for strait pipes. That's the impression I am getting from the site.
that's what i'm getting out of it as well. possible for the person that wants the drag bike sound? and I wonder if it would create enough back pressure to actually make a difference.

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post #8 of 22 (permalink) Old 07-14-2013, 03:55 PM
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Quote:
Originally Posted by thtanner View Post
I am wondering if this is to help create some back-pressure for strait pipes. That's the impression I am getting from the site.
That's exactly what they are for. So they'd be useless on a stock exhaust...
But might do something if you remove the goats belly and don't install a crossover pipe.
Hard to tell by the photo, not sure if they install where the header bolts to the cylinder of where the header meets the muffler....but guessing the latter.

You likely could save the money buy just taking a hammer and whacking a big dent in your header pipes just before the muffler (on the inside so it won't be seen)

The write up at the sight seems to say they were designed for their exhaust pipe only..

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post #9 of 22 (permalink) Old 07-14-2013, 03:57 PM Thread Starter
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Can we even put straight pipes on our bike? if we can are we able to rejet or adjust the screws to get rid of the popcorn maker effect?

EDIT: i have seen it on the forum but want to look into it more. reason i want it louder is cagers are getting deafer and deafer almost got run off the road yesterday. louder for my life and my wife

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Highway bar
Saddle Bags
Emblems Off
iridium plugs
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Better mirrors
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Modded seat
Throttle Assist
Custom sissybar
http://www.kuryakyn.com/Products/378...hrottle-Assist
Wishlist
Never ending

Last edited by LoneVulcan750; 07-14-2013 at 04:00 PM.
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post #10 of 22 (permalink) Old 07-14-2013, 04:00 PM
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Quote:
Originally Posted by LoneVulcan750 View Post
Can we even put straight pipes on our bike? if we can are we able to rejet or adjust the screws to get rid of the popcorn maker effect?
Some people do it. Whether or not it is good for the bike is to be debated I am sure. I'm unsure if they can get rid of the backfire on decel with strait pipes on the VN, but I'm sure somebody will chime in.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
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