MWF FEED
4th February 2022, 12:10 PM
I mocked up a pipe for the right side, welding together some exhaust pipe at the appropriate angles with the right amount of twist then took it to an exhaust centre and asked them to mandrel bend two bends from 42mm pipe to match the angles, so I could weld them together later.
The exhaust guy assured me he could bend the entire pipe with the correct twist, then reverse it for the left side, so naturally I jumped at the chance to avoid welding the two bends together. Roll on five weeks, yep that's right, it took him five weeks, and I picked up the pipes and took them home.
Well, what a balls up, the only thing that was correct was the twist. So, I cut both pipes around half way between the two bends, removed a 25 mm section and welded the two bends together. Problem! The bottom bend was way out, leaving the exhaust bending down toward the ground. To fix, I made a V cut in the pipe a few inches after the bend, bent the tail section up and welded the two pieces together. Repeating the process for the other side.
Now, if you think exhaust pipe is round, it ain't! So twisting the pipes and butting them together leaves a few steps. So, I hammered them a little so they'd match up, welded them together and ground them smooth, then painted them with exhaust black pint.
I mounted some 10mm thick ally in the four jaw, turned up the 42 mm hole, then marked the position of the 10mm exhaust stud holes drilled them through, shaped the clamps and polished them. For the lower mount, I bent up some 3mm steel plate in a half circle with short returns either side, shaped another 3 mm piece of steel to affix to the frame and welded it to the half circle clamp, then painted it exhaust black paint. Next I bent some 3mm ally plate in a half circle with returns each end, stuck it together with the steel half circle and drilled through four holes for stainless Allen heads, and polished the ally half clamps. The pipes have a very slight upwards sweep.
Attached Images
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_14_39_26_Pro.jpg (https://metalworkforums.com/attachment.php?attachmentid=396451&d=1643934401) (170.7 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_14_47_39_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396452&d=1643934415) (233.3 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_15_03_07_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396453&d=1643934428) (245.7 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_14_44_59_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396450&d=1643934386) (179.2 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201114_15_28_07_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396448&d=1643934279) (220.3 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_14_39_09_Pro.jpg (https://metalworkforums.com/attachment.php?attachmentid=396449&d=1643934371) (107.9 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201114_15_26_41_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396447&d=1643934265) (249.6 KB)
https://metalworkforums.com/images/attach/jpg.gif 121042550_2835384486721579_2703075334911079338_n.jpg (https://metalworkforums.com/attachment.php?attachmentid=396446&d=1643934245) (198.7 KB)
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=207684&goto=newpost)
The exhaust guy assured me he could bend the entire pipe with the correct twist, then reverse it for the left side, so naturally I jumped at the chance to avoid welding the two bends together. Roll on five weeks, yep that's right, it took him five weeks, and I picked up the pipes and took them home.
Well, what a balls up, the only thing that was correct was the twist. So, I cut both pipes around half way between the two bends, removed a 25 mm section and welded the two bends together. Problem! The bottom bend was way out, leaving the exhaust bending down toward the ground. To fix, I made a V cut in the pipe a few inches after the bend, bent the tail section up and welded the two pieces together. Repeating the process for the other side.
Now, if you think exhaust pipe is round, it ain't! So twisting the pipes and butting them together leaves a few steps. So, I hammered them a little so they'd match up, welded them together and ground them smooth, then painted them with exhaust black pint.
I mounted some 10mm thick ally in the four jaw, turned up the 42 mm hole, then marked the position of the 10mm exhaust stud holes drilled them through, shaped the clamps and polished them. For the lower mount, I bent up some 3mm steel plate in a half circle with short returns either side, shaped another 3 mm piece of steel to affix to the frame and welded it to the half circle clamp, then painted it exhaust black paint. Next I bent some 3mm ally plate in a half circle with returns each end, stuck it together with the steel half circle and drilled through four holes for stainless Allen heads, and polished the ally half clamps. The pipes have a very slight upwards sweep.
Attached Images
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_14_39_26_Pro.jpg (https://metalworkforums.com/attachment.php?attachmentid=396451&d=1643934401) (170.7 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_14_47_39_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396452&d=1643934415) (233.3 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_15_03_07_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396453&d=1643934428) (245.7 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_14_44_59_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396450&d=1643934386) (179.2 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201114_15_28_07_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396448&d=1643934279) (220.3 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201119_14_39_09_Pro.jpg (https://metalworkforums.com/attachment.php?attachmentid=396449&d=1643934371) (107.9 KB)
https://metalworkforums.com/images/attach/jpg.gif WIN_20201114_15_26_41_Scan.jpg (https://metalworkforums.com/attachment.php?attachmentid=396447&d=1643934265) (249.6 KB)
https://metalworkforums.com/images/attach/jpg.gif 121042550_2835384486721579_2703075334911079338_n.jpg (https://metalworkforums.com/attachment.php?attachmentid=396446&d=1643934245) (198.7 KB)
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=207684&goto=newpost)