Under engine Shorty can - Wrist Twisters
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post #1 of 57 Old 07-30-2008, 12:44 PM Thread Starter
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Under engine Shorty can

So i am finally getting a power commander. Do you think it would be possible to stick a shorty can under the engine or just sticking out the side and map it with no major issues. I know nothing about tuned exhuast systems.

BOOM CHICKA
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post #2 of 57 Old 07-30-2008, 12:50 PM
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Quote:
Originally Posted by gert260 View Post
So i am finally getting a power commander. Do you think it would be possible to stick a shorty can under the engine or just sticking out the side and map it with no major issues. I know nothing about tuned exhuast systems.
Hey Gert, a member here did just that, built some crazy shorty exhaust with the pipe aiming at the back wheel. Anyone remember who that was or where that thread is located?

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post #3 of 57 Old 07-30-2008, 12:55 PM
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heres a pic of the bike, but personally id like to know how to make a true under tail exhaust.
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File Type: jpg crazy 919.jpg (125.7 KB, 179 views)

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post #4 of 57 Old 07-30-2008, 01:01 PM
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I'd like to see the four into four exhaust setup like MV Agusta uses adapted to the 919.

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post #5 of 57 Old 07-30-2008, 01:22 PM Thread Starter
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I love that MV setup. Bruce Wayne rides one in Dark Knight. (Ithink I am a little too obsessed with that movie.) Thanks for the heads up on the shorty can.

So I could just pop one on remap and roll?

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post #6 of 57 Old 07-30-2008, 01:25 PM
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Quote:
Originally Posted by gert260 View Post
I love that MV setup. Bruce Wayne rides one in Dark Knight. (Ithink I am a little too obsessed with that movie.)
Yeah, I pounded Gin on the leg when the MV hit the screen!

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post #7 of 57 Old 07-30-2008, 01:26 PM
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Like this?

Dan

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post #8 of 57 Old 07-30-2008, 01:27 PM Thread Starter
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Quote:
Originally Posted by sbeau1960 View Post
Yeah, I pounded Gin on the leg when the MV hit the screen!
Dani looked over at me and said.."that just got you excited didn't it." I simply nodded as I drooled.

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post #9 of 57 Old 07-30-2008, 01:35 PM
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Or this?


Dan

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post #10 of 57 Old 07-30-2008, 01:36 PM
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Quote:
Originally Posted by voodooridr View Post
Like this?

Dan
Yeah, I think that's a 599, but that's the basic concept. I'd like to see a true 4 into 4 though, that pic appears to be a 1 into 4.

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post #11 of 57 Old 07-30-2008, 01:37 PM
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Quote:
Originally Posted by voodooridr View Post
Or this?


Dan

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post #12 of 57 Old 07-30-2008, 01:37 PM Thread Starter
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Quote:
Originally Posted by voodooridr View Post
Or this?


Dan
I want that.

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post #13 of 57 Old 07-30-2008, 01:45 PM
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The MV pipes are a 4-2-1-2-4 setup, I've ridden the MV F4 AGO and they are way beyond wicked, but they're also painful to ride

Dan

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post #14 of 57 Old 07-30-2008, 02:05 PM
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Quote:
Originally Posted by voodooridr View Post
Or this?

MMMmmmmm, Love it!

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post #15 of 57 Old 07-30-2008, 02:37 PM
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Oh. I thought the thread was Under engine Sporty can......

Where did THOSE full-aggro units come from?

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post #16 of 57 Old 07-30-2008, 02:52 PM
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Gert -

I am no mechanic by a long stretch, but I think the answer to your main question is no. You cannot just create a shortie under engine can, plug in a Dynojet, map it and ride off into the sunset.

There are a few issue to deal with. You will have issues with low end power loss due to a lack of adequate back pressure on the engine. Unless you are building a track bike that will run consistently in high RPM's, your exhaust needs to create some back pressure on the engine. One way to do that would be to build channels in the can. This is especially trouble for twins as their exhaust resonance is quote different to a 4 Banger / 4 Cylinder.

Many of us that tinkered with different set-ups for the RC-51 were faced with this challenge. Even with your basic under seat exhaust systems, you have to take into account things like pipe diameter and it's effect on exhaust gas flow. The MV has a larger diameter Y joint where it goes 4 - 2- 1- and 4 again. And when you buy after market pipes like Ferraci, they actually offer a choice of diameters which impacts performance, etc.

Sorry to add to your question mate. But, do give it thought before you take action.

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post #17 of 57 Old 07-30-2008, 02:52 PM
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I'd like to roll with one of those MV's, an F4 or the Brutale 1078! It would be sweet!

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post #18 of 57 Old 07-30-2008, 03:27 PM
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Quote:
Originally Posted by gert260 View Post
Do you think it would be possible to stick a shorty can under the engine or just sticking out the side and map it with no major issues.

No.

Professional
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post #19 of 57 Old 07-30-2008, 03:30 PM Thread Starter
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how bout somfin like dis



pretty sweet 919. I think its a Duc tail section. Guy states he didn't even remap.

BOOM CHICKA
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post #20 of 57 Old 07-30-2008, 03:34 PM
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Mucho better!

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post #21 of 57 Old 07-30-2008, 05:58 PM
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People change their exhaust all the time without the nuisance of a power commander. Do you feel you really need one?

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post #22 of 57 Old 07-30-2008, 08:16 PM
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Quote:
Originally Posted by gert260 View Post
how bout somfin like dis



pretty sweet 919. I think its a Duc tail section. Guy states he didn't even remap.
That looks bad*ss!! And yet, if you look a little closer, it does not seem like he did too much. New wrapped Exhaust system, black powdercoating, dominator lights, rearsets, a Duc tail, and paint = a complete change in attitude!

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post #23 of 57 Old 07-30-2008, 08:26 PM
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post #24 of 57 Old 07-30-2008, 11:08 PM
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In reading the very poorly written manual for my CAD program, I discovered it's possible to import a BMP picture! Here's a quick concept of the MV exhaust, I'm having fun with it, so if you have a general shape you would like to try out, let me know and I'll see what I can do.




Rob

If it has already been done, it is safe to assume it is possible to do it.
On the other hand, if it has not been done never assume it is impossible to do it.
------- Rob --------
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post #25 of 57 Old 07-31-2008, 05:32 AM
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Gee, wish I had a CAD program! Cool stuff Rob!

Gert, I do like that blacked out bike with the can sticking out the side, seems to be exactly your style from what you've written.

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post #26 of 57 Old 07-31-2008, 07:18 AM Thread Starter
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Quote:
Originally Posted by gpzTurbo View Post
People change their exhaust all the time without the nuisance of a power commander. Do you feel you really need one?
I got a good deal on one. Might as well try it out.

BOOM CHICKA
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post #27 of 57 Old 07-31-2008, 07:56 AM
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Hey, don't know if you knew this? But the Jim Bailey dealer is an authorized Dyno jet tuning facility, and they only charge 25 per hour (includes the dyno). I thought that was kind of cheap?

His dyno tech was a honda mechanic, and they claim he has tons of experience tuning the metric bikes. It would be worth checking into.

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post #28 of 57 Old 07-31-2008, 08:03 AM
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Power Commanders

Many a debate rages about Power Commanders. Some say you need it, others say you don't. They are a good item to have when you change your exhausts because once you do things like removed Carbon or Emissions cans and get after market pipes, you change the performance of your bike. Things like your EU or Fuel Injection systems were set up to run with the stock pipes the bike came with.

Often times, an after market pipes create more free flow of exhaust gases which can result in lost power in certain parts on your power band. Will it kill your bike to not have one? No. But will you feel the difference between using one and not using one? Yes. Mapping also allows you decide the richness of the mixture of your bike's fuel. This can impede or improve performance. Twins were particular total pigs without Power Commanders when you changed their exhaust.

Usually, if you just change the cans you can get away without one. However, if you do a full mod where you change the entire system including the Headers and Mid-Pipes, you should definitely get one.

PUBLIC BIKE HEALTH WARNING! This has been a W/T Non-Expert Mechanical Advice Segment.

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post #29 of 57 Old 07-31-2008, 08:15 AM
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Quote:
Originally Posted by sbeau1960 View Post
Gee, wish I had a CAD program! Cool stuff Rob!
Punch! software ViaCad 2D / 3D. Available at Fry's for an average of $70. It doesn't have the versatility of Auto Cad or Solidworks, but it's on hell of a lot easier to use.
With some practice you can do things like this:

Pretty easily.

I recommend it highly.

Rob

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On the other hand, if it has not been done never assume it is impossible to do it.
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post #30 of 57 Old 07-31-2008, 08:36 AM
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Rob - I have been thinking about ViaCAD 2/3D for design work. How sophisticated is it? Do you know if you can animate designs on various axis?

Sorry for the thread jack Gert

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post #31 of 57 Old 07-31-2008, 08:54 AM Thread Starter
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Quote:
Originally Posted by WIM-RC51 View Post
Rob - I have been thinking about ViaCAD 2/3D for design work. How sophisticated is it? Do you know if you can animate designs on various axis?

Sorry for the thread jack Gert
I don't ever get mad at a thread jack. A good conversation never stays in one place.

BOOM CHICKA
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post #32 of 57 Old 07-31-2008, 08:58 AM
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I think the only way a PC3 is worth anything, is only if you get it tuned and mapped for your bike. Every bike is different and will require different amounts of fuel/air to achieve the same results. The only reason I have not done a PC3 is because of that reason, the fact that I'm flat ass broke right now and can't afford the cost of the unit and tuning might have something to do with it also???

Man, I need to get a job!

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post #33 of 57 Old 07-31-2008, 09:04 AM
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I thought of doing that with mine, but I was worried that the M4 can would be too loud?

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post #34 of 57 Old 07-31-2008, 09:32 AM
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Quote:
Originally Posted by robtharalson View Post
Punch! software ViaCad 2D / 3D. Available at Fry's for an average of $70. It doesn't have the versatility of Auto Cad or Solidworks, but it's on hell of a lot easier to use.
With some practice you can do things like this:


I recommend it highly.

Rob
I have Autocad and solid works to use at work but would love a cheap program to buy for myself at home. I might have to look into this.

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post #35 of 57 Old 07-31-2008, 11:08 AM
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Rob919: That shorty can sticking out by the footpeg looks awesome!

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post #36 of 57 Old 07-31-2008, 12:37 PM
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Quote:
Originally Posted by gert260 View Post
how bout somfin like dis



pretty sweet 919. I think its a Duc tail section. Guy states he didn't even remap.

Where is there more information on this? I think it looks perfect.

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post #37 of 57 Old 07-31-2008, 12:43 PM
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Quote:
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Where is there more information on this? I think it looks perfect.
my guess would be a 900RR header and the correct can. Project complete!

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post #38 of 57 Old 07-31-2008, 01:41 PM
 
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Quote:
Originally Posted by voodooridr View Post
Or this?


Dan
OK, This gave me some ideas!!!!!

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post #39 of 57 Old 07-31-2008, 01:58 PM
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shorty love the club

the shortier the better...
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post #40 of 57 Old 07-31-2008, 02:20 PM
 
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Quote:
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You CG those mirrors on there too Rob?

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