Can anyone point me in the right direction to get a bit of tube bent for between a supercharger and an intake plenum? Its not an off the shelf
dimension and needs to be in metal
76mm OD tube with 2mm thick walls (can be 3 if easier?), legs can be 15cm long but no longer, however, this is where it gets tricky as i need it to be
7cm from the top of the bottom leg, to the bottom of the top leg...if that makes any sense??? I will get a picture uploaded to make it clearer.
Anyone got any ideas? I cant weld so making something isnt an option and silicone hose isnt suitable.
Cheers
N1
[Edited on 5/10/19 by number-1]
Don't know about tube bending, but it looks a pretty tight bend to me. Might be something you need fabricated for you from 2 or more sections.
Hello mate,
Yeah thats what i thought too. Maybe x2 90 degree elbows cut down and left with 3.5cm on each joining leg?
Its probably a simple thing to do if i knew how to weld
It seems like something an exhaust fabricator could make for you in stainless steel tube.
That,s a really tight radius, tube bender is the person to call
https://tube-bender.co.uk
He will tell you what's possible, if he cannot get it that close you will need to get a bent section off him as close as possible and then have
someone slice it and weld it to tighten up.
The tightest bends I have seen are 1.5 the tube diameter.
LINK
With a radius that tight I would get two 90's and weld them.
May be worth trying to look for donuts
may not be the correct size but may help the search
eBay Item
https://www.ebay.co.uk/itm/INTERCOOLER-PIPE-MANDREL-BEND-Mild-Steel-3-5-360-DEGREE-DONUT-SEAMED/223062979897?hash=item33ef96f539:g:arAAAOSw9-ldkEVS
I think the original pic is somewhat confusing,
it mixes cm and mm as units and seems to draw it much tighter than required
a slightly closer to scale, without mixed units might be
Description
Two of these
https://www.allstainlessltd.co.uk/nominal-bore-fittings/nominal-bore-schedule-10-90-deg-weld-elbow-to-ansi-b16.9-316
or
https://www.allstainlessltd.co.uk/nominal-bore-fittings/nominal-bore-schedule-40-90-deg-weld-elbow-to-ansi-b16.9-316
or
https://www.allstainlessltd.co.uk/mandrel-bends-and-tube-for-exhaust/hygienic-90-deg-bend-316-to-bs4825-part-2-1D-polished
welded together
[Edited on 5/10/19 by Simon]
99% sure that's too tight to bend. Maybe a cast part might work, welded together.
I´d go for Pie-Cutting from appropriate material and sending to welding shop.
As a lot of the labor goes into cutting, dressing and fitting, cost may be reduced substantially...
HTH.
You need an 73mm centreline radius (to hit your 7cm (70mm?? Don't mix units lol). If you find some place that can do that, and not break the bank
of a hobby project, let me know, it would probably get me a promotion at work! Haha. Basically its not a normal bend radius so would need specific
tooling to do = ££££.
Best option imo would be 2x 90 degree bends and some fabrication work to achieve your part
[Edited on 7/10/19 by WallerZero]
Try Rich's Fabrication Shop in Abingdon on faceache.
He seems an all round top welder and does lots of one-offs.
HTH.
#Cheers, Pewe10 
quote:
Originally posted by Simon
Two of these
https://www.allstainlessltd.co.uk/nominal-bore-fittings/nominal-bore-schedule-10-90-deg-weld-elbow-to-ansi-b16.9-316
or
https://www.allstainlessltd.co.uk/nominal-bore-fittings/nominal-bore-schedule-40-90-deg-weld-elbow-to-ansi-b16.9-316
or
https://www.allstainlessltd.co.uk/mandrel-bends-and-tube-for-exhaust/hygienic-90-deg-bend-316-to-bs4825-part-2-1D-polished
welded together
[Edited on 5/10/19 by Simon]
I fabricated mine from 'Donuts'.
Available from most outlets, e.g. Merlin where I bought mine (I have no connection).
You might be able to bodge a silicone hose onto a half-cut donut, but not something I'd even try (I weld things).
For something that tight, I would make a hardwood former and form it as two sides from flat sheet.
Though at 2mm it will need to be annealed so oxy-acetylene or propane will be needed.
Even so it could be difficult to weld in the middle.