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2:1 Stainless Collector pipe

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    2:1 Stainless Collector pipe

    I've tracked down a firm in Cardiff (UK) that look like they will happily fabricate anything in stainless. Price might be ok too.

    Anyone got a spec/design to hand that I can forward to them for a quote?

    Link if someone wants to check them out:

    http://www.longlife.co.uk/street/products.range.aspx

    Maybe an outfit similar in the USA?

    A 2:1 collector that's useful for the track as well as the street, might be worth the racers getting their heads together over?

    #2
    I'd be interested in a high level stainless system if they can make it look like this :-

    '95 ShaftHawk 650P>
    Front: Bros Mk2 front wheel; Mk1 forks; MetalGear disc; NC30 caliper; cb1 yoke.
    Breathing: Hacked up and shortened ART tri-can on collector and link pipe from DemonTweeks.
    Other: RGV bars; DefT dash; modded subframe; modded rearsets; relocated ignition.

    '91 Bros 650 Mk1>
    Currently off the road.

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      #3
      i would be intrested if it was a equal length stepped header design that ended UNDER the bike, in a manner that allowed a race-legal "catchpan" fairing.

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        #4
        Originally Posted by DefTrap
        I'd be interested in a high level stainless system if they can make it look like this :-

        Me too I wonder why fuel don't do the high level systems? I reckon they'd still out sell their current ones, even if it meant people giving up their centre stands.

        Ribbit2, have you been on the blower to this Cardiff outfit?
        '88 Bros NT650J
        Progressive fork springs, '93 CBR600 F2 fork caps, CBR900RR rear shock, Puig 'Raptor' fly screen
        Fabitappi Monoposto seat cover, Heated grips, Braided brake lines, Buell indicators/turn signals
        Ceramic coated stock headers with custom Yoshi shorty muffler & Muzzy collector

        Comment


          #5
          Saw a custom *hack, spit* SV at the Javits Center in NYC last winter with the coolest exhaust ever... I'll post pics. Something like it on a Hawk would be the sickness.
          1988 "BlackHawk" project
          1989 "RallyHawk" is Chuck's now!
          1988 "The Gray" Tempest Gray Metallic stocker

          I can't tell you how peaceful it is. Shinya Kimura
          People who know ride Hawks. Riot

          Comment


            #6
            "Ribbit2, have you been on the blower to this Cardiff outfit?"

            No not yet Swipe, I spotted on their site that they offer to do basically anything, no matter how small, so I figured it'd be best to sort out what would fit in with just about everyones needs, then get onto them.

            If the collector between the headers and the can in Deftrap's piccy were to be in say 2 pieces, with the front 2:1 section somehow meeting what MrD needs with the "equal length stepped header design that ended UNDER the bike", then if that's 'doable' I recon just about everyone could get what they need out of it. There any way the stock headers and stepped headers 2:1 might be harmonised and suitable for both? The stepped and stock headers share the same tube diameters and width centre to centre?

            Two parts, or even 3 parts if it came to it, I doubt would cost a bomb (joints in tubes aren't a problem with tube forming machines) and might facilitate this, and could offer great flexibility all round (including DefTrap's high level)? Only issue might be working out secure enough mountings for the separate pieces I suppose.

            However if it was all done in one piece, and 'extra tubing was provided for the length (say 4" extra left on for cutting and jointing purposes?), then it could be cut and the tube formed locally to make a joint where necessary, and there might be a bit of extra offcut left over or something. This extra piece could even be used closer to the 2:1 once cut off, so the stepped header can be accommodated with enough tubing to carry the single pipe back as far as people like MrD need? Sure it involves extra work once the thing is actually in our hands, but the hard graft of getting the collector done would be out of the way?

            Could even have a 180 deg bend formed as a sacrificial part at the end of the pipe, to be available to cut and include closer to the collector?

            Maybe the ideal solution given the way exchange rates are heading, if there's one available, is for a similar outfit in the States to do the fabricating, which would mean USA people wouldn't be disadvantaged (heck carriage on such an item outside the USA wouldn't be too painful for the rest of us at all).

            Anyone any good with CAD? A pal in Finland is, but I haven't seen him online for a bit. I think he is up to his eyes in getting his semi-precious stone machining gear up and running at the moment (now there's a thought, a Bros clothed in machined sheets of semi precious stones . . . ).

            I'm looking forward to seeing the piccys of the SV Doug has got though.

            Comment


              #7
              I am interested in a collector pipe just like the one on the picture. .

              Comment


                #8
                Originally Posted by jensen
                I am interested in a collector pipe just like the one on the picture. .
                That's a one-off Renegade by the way - they didn't seem too interested last time I contacted them.
                '95 ShaftHawk 650P>
                Front: Bros Mk2 front wheel; Mk1 forks; MetalGear disc; NC30 caliper; cb1 yoke.
                Breathing: Hacked up and shortened ART tri-can on collector and link pipe from DemonTweeks.
                Other: RGV bars; DefT dash; modded subframe; modded rearsets; relocated ignition.

                '91 Bros 650 Mk1>
                Currently off the road.

                Comment


                  #9
                  Must admit DefTrap, I'd really like the one in your piccy kept slightly off centre and swung up higher and under the seat . . . .

                  Which is a thought - if we went for the tube forming for underseat mounting, would that provide enough tubing and preformed bends, to sort out what everyone could possibly want?

                  For example a joint could be put in at the point in the pipe left and a little lower than the footpeg (in line with the lower half of the swinging arm), and the piece of pipe from there into the slip on, could be the piece that would otherwise transition from the vertical, and into the slip on under the seat?

                  Comment


                    #10
                    From my POV you want as few joints as possible - the Hawk / Bros is a vibey beast, I don't think joints are helpful and they tend to be ugly.
                    Is an under the seat system going to work with the stock seat cowl? I don't think so, unless the shock pitched it awfully high at the rear. Or were you thinking of a one-off rear end, HiperForm stylee?

                    I'm not sure this project can be all things to all people - but then I'm no engineer.
                    '95 ShaftHawk 650P>
                    Front: Bros Mk2 front wheel; Mk1 forks; MetalGear disc; NC30 caliper; cb1 yoke.
                    Breathing: Hacked up and shortened ART tri-can on collector and link pipe from DemonTweeks.
                    Other: RGV bars; DefT dash; modded subframe; modded rearsets; relocated ignition.

                    '91 Bros 650 Mk1>
                    Currently off the road.

                    Comment


                      #11
                      Originally Posted by DefTrap
                      From my POV you want as few joints as possible - the Hawk / Bros is a vibey beast, I don't think joints are helpful and they tend to be ugly.
                      Is an under the seat system going to work with the stock seat cowl? I don't think so, unless the shock pitched it awfully high at the rear. Or were you thinking of a one-off rear end, HiperForm stylee?

                      I'm not sure this project can be all things to all people - but then I'm no engineer.
                      Yeah I agree with you about the joints being as few as possible in principle, and good point about the vibes too - though maybe you should see my friends Aprilia Futura system with all the joints in that for a V twin, hehe.

                      It's just people understandably want different things, and if 'one design' could encompass maximum length (such as what would be necessary for an under the seat set up), and say include that extra material 180 deg bend on the end intended to be cut off to provide preshaped material to cut chunks out of to work with, people would have whatever bend sections they wanted and needed to hand and easily cut.

                      To be fair, stainless welding today can even be done to a high standard by people like my MoT station guy (so eliminating joints as such), as long as he's got something to weld to, and loads of deliberately included resource material would certainly give him that. *grins*

                      I've seen a very compact Yoshimura underseat can that could potentially be made to fit into fabi's new fibreglass seat cowl (and as it's fibreglass, it's easily modifiable). I doubt I would actually go for underseat though at this point, I'd have to get my hands on the suitable can, and take it from there. Certainly pay me to get fabi's cowl at some point in preparation though, and have a close look to see what I could work out with it.

                      If people want to go with something decidedly 'KISS' and 'CAP' then that's fine by me, as once we have our hands on a basic collector for reasonable money, getting hold of more tube sometime later would be ok for me personally.

                      Can that be made to work for the guys that want collectors for the stepped headers though? I certainly don't mind the thought of paying a little more so we can include them too (or they can include us, whichever).

                      Comment


                        #12
                        The "Stepped Header" that Mr Dude describes involves new headers themselves. That is, the pipes running directly from the exhaust ports on the engine, and would therefore be a full system, as opposed to only the "slip on" collector that you (and others on this) seem to be after.

                        While it would be possible to do both I think, a set of stepped headers which have the same outlet diameter and C-C distance as stock and end under the engine, and a 2-1 collector available seperately, I don't think it would be feasible to try to do stepped headers that actually give any performance gain without a lot of work (read as time on a dyno). Tuning exhausts seems to be a trial and error thing if you don't have big computers, and it looks like this particular outfit don't have experience with bikes?

                        One problem I see; cars use much larger diameter tubing, it is possible this particular company may not be able to supply us.

                        Sorry I don't mean to sound negative. I think the collector idea is a great one but, getting it to work with the stepped header is perhaps a bit ambitious. I'd say go with theRenegade design in Al's picture.

                        But then, like Al, I am not an engineer either.

                        Comment


                          #13
                          I'd be interested in something similar to what's in the pic if possible, if not, then just a nice simple short 2-1 that fits the stock headers.. I guess the more of us agree on the one style the more likely it will happen

                          Gotta stop buying stuff for this bike, it's becoming an obsession

                          Comment


                            #14
                            oops double post..

                            Comment


                              #15
                              crap, third post..
                              stupid work network

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