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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Custom header /cgi-bin/YaBB.pl?num=1262208249 Message started by verslagen1 on 12/30/09 at 13:24:09 |
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Title: Custom header Post by verslagen1 on 12/30/09 at 13:24:09 My brothers friend has a pipe bender. I'm going to try to fab up a header and straight pipe. Aiming at 1.5" OD and header wrap. Anybody know where I can get the ring for the flange? Anybody know what baffles will work well? |
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Title: Re: Custom header Post by retired on 12/30/09 at 14:09:50 You could us a 1.5" steel washer spot weld it on, then grind it down to your outside diameter. Hope this helps. Harry |
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Title: Re: Custom header Post by Serowbot on 12/30/09 at 14:44:57 I hate the stock flange,... I want a finned one like this... I thought about measuring, and going junkyard hunting... I've also toyed with the idea of an upswept left-side exhaust... wrapping around the front downtube and back along the belt... That'll never happed either... :-? If I was Versy,.... it would... ;) http://i119.photobucket.com/albums/o147/klx650sm2002/img042.jpg |
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Title: Re: Custom header Post by thumperclone on 12/30/09 at 15:13:57 check jp cycles think the have those weld on flanges in their hardly cataloge.. courious why go down in size?? |
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Title: Re: Custom header Post by verslagen1 on 12/30/09 at 16:02:20 524E534B564354454A494843260 wrote:
Stock pipe is about 1 3/8" |
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Title: Re: Custom header Post by BurnPgh on 12/30/09 at 16:08:10 273423223D3036343F60510 wrote:
ID or OD? |
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Title: Re: Custom header Post by RidgeRunner13 on 12/30/09 at 17:16:31 Does anyone remember a 'baffle' called a "Snuff or Not". Looked like a washer with a stem on it, like a lolli-pop. They wre spring loaded with a square washer that had the corners bent down against the pipe & a knob so you could turn it. We used vacuum cleaner pipes for our straight pipes with one or two "Snuff or Not"s' in them. Could go form loud to quiet just by turning the knob. Great for slipping into your neighborhood without getting noise complaints. 8-) |
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Title: Re: Custom header Post by thumperclone on 12/30/09 at 17:23:22 i remember dumper headers on '57 chevys peacmaker pipes (think from national cycle)have an selenoid controlled version of what you are talkin about |
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Title: Re: Custom header Post by thumperclone on 12/30/09 at 17:26:24 slagy i tink i rememer a post on pipe size geomerty... am rememberin pontiac GTOs W/ pencil pipes TOO much PFFFFT... |
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Title: Re: Custom header Post by JohnBoy on 12/30/09 at 17:52:09 6E55585B596E495252594E0D0F3C0 wrote:
I built and installed three of them one, lasted a whole weekend! They all blew out on I-17 once I hit 70+. I guess that I am not as good a welder as I thought? |
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Title: Re: Custom header Post by thumperclone on 12/30/09 at 19:46:39 2A0F080E220F19600 wrote:
I built and installed three of them one, lasted a whole weekend! They all blew out on I-17 once I hit 70+. I guess that I am not as good a welder as I thought? [/quote] in the OPEN mode still has restriction, larger dia pipe with same set up wouldnt BLOW..gotta do the math but I aint D 1 that knows the forumla... |
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Title: Re: Custom header Post by RidgeRunner13 on 12/30/09 at 20:38:51 The ones we used were stamped from one piece of steel, no welds. And turned sideways they offer very little restriction. 8-) |
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Title: Re: Custom header Post by justin_o_guy2 on 12/31/09 at 07:08:41 The ID on a stock header is pretty small. Like 1 & 1/8th or so. |
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Title: Re: Custom header Post by klx650sm2002 on 12/31/09 at 10:06:33 1.5" i.d. would be good and a match for one of Lancer's mikuni VM38's. Clive W :) |
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Title: Re: Custom header Post by buttgoat1 on 12/31/09 at 17:43:39 I seem to recall from earlier discussions on here someone opined that putting too large of a pipe (just the outer shell of the stock header say) would be counterproductive to exhaust velocity and that putting cone shaped insert after the port would increase velocity, maintain backpressure and prevent backflow. After that, the ID of my screaming eagle muffler is 1 5/8, so 1 1/2 would be just right to match that. |
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Title: Re: Custom header Post by Charon on 12/31/09 at 19:51:27 Too bad exhaust systems aren't that simple. The problem is only slightly related to "back pressure." The math that most closely resembles the math of exhaust systems is just about the same as the math that describes radio frequency transmission lines. The pulses that reflect back and forth in the exhaust system end up resembling standing waves in transmission lines. If the engine ran at a nearly constant speed - as a transmitter operates at a nearly constant frequency - it would be much easier. Those resonances in the exhaust explain very neatly the phenomenon of an engine "coming onto the pipe." The intake system is also resonant, and is often tuned to a different resonance than the exhaust to "smooth out" the engine's torque curve. Racing engineers go to great lengths to get intake and exhaust resonances at the same place. The benefit is quite high torque and power, at the cost of a very narrow torque band. If minimum back pressure were the only goal, you need look no further than the exhaust stubs on the WWII Spitfire. The pipe was only just long enough to get from the exhaust port to the outside air. The absolute minimum back pressure would likely happen by simply removing the exhaust altogether. |
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Title: Re: Custom header Post by Truckinduc on 01/01/10 at 13:06:49 i had to make my own flange. well i make the entire exhaust too http://i26.tinypic.com/2v3imwg.jpg http://i32.tinypic.com/vio7ec.jpg http://i31.tinypic.com/2zj9cw3.jpg http://i30.tinypic.com/2vwxrif.jpg http://i26.tinypic.com/3518i0h.jpg |
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Title: Re: Custom header Post by smokin_blue on 01/01/10 at 13:41:18 Truck, What size pipe is that that you used? (great looking pipe by the way) |
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Title: Re: Custom header Post by verslagen1 on 01/01/10 at 15:16:47 beautiful welds truck. I can see you know what you're doing. |
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Title: Re: Custom header Post by LANCER on 01/02/10 at 06:58:45 Yes, very nice work indeed. I need to practice ... a lot. |
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Title: Re: Custom header Post by justin_o_guy2 on 01/02/10 at 09:08:25 So, whats the deal w/ the caps & hose? |
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Title: Re: Custom header Post by verslagen1 on 01/02/10 at 14:10:51 352A2C2B3631003000382A266D5F0 wrote:
That's to back fill the weld with inert gases to prevent corrosion and embrittlement. |
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Title: Re: Custom header Post by Savage_Amusement on 01/03/10 at 13:32:16 Well I'm impressed that looks awesome. I only wish we didn't have the right cover that was shaped around the exhaust. |
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Title: Re: Custom header Post by Truckinduc on 01/10/10 at 09:32:36 I plan on changing that boring looking cover. and incorporating an oil cooler in there somewhere. |
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Title: Re: Custom header Post by Max_Morley on 01/10/10 at 10:50:13 Besides the beautiful exhaust on the bike did you notice it also has a mono-shock suspension fabricated. Definitely some quality work. Max |
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Title: Re: Custom header Post by diamond jim on 01/15/10 at 18:48:52 V, if you're talking about the flange that I think you're talking about, I got two in my garage. The M50 flanges are identical to the S40. You can have 'em free if that's what you need. |
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Title: Re: Custom header Post by BurnPgh on 01/15/10 at 18:50:21 DJ!!! YOURE BACK!!! :) |
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Title: Re: Custom header Post by verslagen1 on 01/15/10 at 19:43:27 79747C707273797774701D0 wrote:
I'll keep yours in mind, right now we're checking into what's available straight from the mill and part them off ourselves. |
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