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Old 07-15-2005, 12:45 PM   #1
BigMac OP
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2 into 1 exhaust?

I know a few fellow 950 owner's and DIY guys had mentioned in the past about fabricating a 2-1 setup on the 950, I had been planning the experiment myself but unfortunately just have not found the time even though I have a friend with the mandrel tubing bender, SS tubing and TIG welder. The projects greatest appeal is opening up the left rear side of bike for a 3rd petrol tank of maybe 8-10 liters which may result in 250mi fuel range...or at least that is my optomistic hope. Anyway, Summer is here, my son and I are looking to do some riding in Central America and I'm still handicapped with 150-160 mile fuel range...maybe 175 if I really nurse her along.

So, has anybody successfully completed their 2-1 exhaust? If so, would you be interested in your 1st customer? If not, at least be willing to share your experiences, design, pitfalls and maybe success? Take care.
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Old 07-15-2005, 01:03 PM   #2
k7
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Wish I could help - it's an admirable goal but is a 150-180 mile range really that much of a handicap? I've traveled in Mexico, Guatemala and Belize and was never (overly) concerned about running out of gas.

I'll admit I've purchased gas out of a barrel but another 50-miles wouldn't have made a difference in those instances. No flames intended!
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Old 07-15-2005, 01:52 PM   #3
CraigTransalp
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Burns Stainless

If you have the cash, these guys will do the 2 into 1 section at very high level of quality. Smooth as a baby's bottom inside and outside welds.
www.burnsstainless.com
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CraigTransalp screwed with this post 07-15-2005 at 01:53 PM Reason: edit
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Old 07-15-2005, 03:33 PM   #4
autorotate
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Am I doing something wrong??

244.3 miles till bone dry


Configuration: Myself (230 lbs) and the KTM 46L topcase loaded with 25lbs.

Environment: 50% Paved, the other 50% a mix of gravel/dirt roads.

Had a gas can, and had to see for myself what the range was.

Low fuel light came on at 169, 173, and finally stayed illuminated at 177...


Puttered to a stop and the trip odo read 244.3 miles
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Old 07-15-2005, 03:42 PM   #5
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There was a fella here, I think from one of the Scandanavian countries that had done a nice job on the single exhaust.

I reckon only having a spare fuel cell on one side might fell odd, especially as the weight fluctuates from full to empty (20lb swing). It would likely need it's own fuel pump as well.

I've done 220+ and never ran out, might have to try Auto's experiment one day.
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Old 07-15-2005, 04:34 PM   #6
Mack
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Quote:
Originally Posted by Ant Ware
There was a fella here, I think from one of the Scandanavian countries that had done a nice job on the single exhaust.

I reckon only having a spare fuel cell on one side might fell odd, especially as the weight fluctuates from full to empty (20lb swing). It would likely need it's own fuel pump as well.

I've done 220+ and never ran out, might have to try Auto's experiment one day.
I had emailed him, and he cross posted to http://www.monomaniacs.nl/smf.htm (might have been 950owners site, but I'm 99% it was mm.) Can't find any of it now.
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Old 07-15-2005, 04:35 PM   #7
autorotate
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Are these the guys?????

http://www.evamotor.nl/
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Old 07-15-2005, 04:55 PM   #8
Fresno
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Quote:
Originally Posted by CraigTransalp
Smooth as a baby's bottom inside
I don't think thats what he meant.
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Old 07-15-2005, 05:08 PM   #9
JediBri
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Quote:
Originally Posted by autorotate
Low fuel light came on at 169, 173, and finally stayed illuminated at 177
Ditto. Shouldn't the 950 be well into the 200s before running out? When Bike did the adventure test last year they had the warning light listed at 170mi and out at 256mi...

Brian
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Old 07-15-2005, 05:32 PM   #10
Flanny
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I need extra range. I can only get about 320 kms out of a tank, and no, that is not enough around here. We often explore areas where it is 280-300 kms to known gas, but with an uncertain route to get there. If we travel 230kms, only to find that a beaver has dammed the road, we need to go back! So, the stock range is not enough.

We've taken to carrying extra fuel strapped onto the back rack on onto the saddle bags. It's really not that bad...but it's certainly less safe, and not optimal weight placement.

I would kill for a "low" routed 2-into-1 like on the 950 Rallye...

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Old 07-15-2005, 05:35 PM   #11
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Stillborn, but I can't find the other thread, damn JM mods have trashed the backroom, fast food wrappers and porno mags everywhere, and cigar buttes in the server. Clean up on aisle 7, where is Meatpopsicle?


http://www.ADVRider.com/forums/showt...ghlight=single
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Old 07-15-2005, 05:37 PM   #12
SQD8R
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I looked into doing a 2-1 on my RC51 (R.I.P.'s ) like the 1st season AMA bikes were some years back. I checked with local fabricators, living in Windsor, Canada's motor capital, had some advantages, and found that it could be done relatively easily and @ less expense than a pro-job. Also a racer in the Canadian Race series has an RC51 with this configuration. I'm headed to MoSport for the 3rd round tomorrow. If he's there, and still using this configuration, I'll get some pics for you. While not the same degree of angle it can provide for some basics. If nothing else you may have a starting point for some ideas.
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Old 07-17-2005, 06:00 PM   #13
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sorry boys, the guy I knew who did it on the RC51 has switched to an underseat exhaust this season. Good luck with this endeavour and keep posting updates pls.
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Old 07-17-2005, 07:00 PM   #14
BigMac OP
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Cam and port specs

Well since it appears nobody has yet actually built such a system, I'm volunteering to be the guinea pig. In order to get the design hopefully close to ideal for scavenging purposes, I need some engine specs. I already know the cylinder angle, valve sizes and header OD, I cannot however find the cam specs nor port size and shape. Yes, I could simply take things apart and measure but I'm hoping somebody may have the info such that I can still ride my bike while I'm designing and fabricating the new system. I need intake and exhaust port diameters and shape or cross-sectional area, the cam lift for intake & exhaust, cam timing (degrees) at lift centerline, intake and exhaust duration at 0.050" lift or where duration is measured and cam timing for opening of intake and exhaust valves (degrees btdc/atdc).

If I can recieve the above info by end of this week, I will have a prototype 2-1 system installed and operating by August 1. Please help the cause if you have access to this info.

As for exhaust can, no problem. I'm going to use a Scorpion SS can designed for R12GS. It's an 18" perf core straight through design that can easily accomodate the exhaust flow of a 950 twin. I'm even going to remove the end cap to install a Pro Moto billet endcap which features a USFS approved spark arrestor and a removable throat collar to attenuate noise levels to within 92db EU regs. Once system is built and has been dyno tuned, I will be happy to share all specs and materials used by posting them on this board. Take care.
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Old 07-17-2005, 09:03 PM   #15
AFekete
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Wicked Neptune Exhaust....

We're working on the rally two into one setup...stay tuned..

thanks,
Andrew
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