Fitting SU carb

commeracer said:
You need 2 more holes in that flange. There is 2 above the mounting studs that allow the air above the dashpot to be displaced.
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Argh :mad: Should the filter have been this way up then ? (Ignore the extra hole, it was to get it to fit) AD2F2CA7-F152-498C-ABD2-616223B79E6C.jpeg
And I used the rubber gasket which I thought was this way up1F4F0BDA-B91A-4513-AC82-8EB96F34165F.jpeg (spin anti clockwise)
So I assume the extra holes have to be filtered does there have to be 2? And could I get a tube to join the pipe or does it all have to mix at the carb face? And he ran alright with it wrong. Thank you for the info though, I had no idea:eek:
 
Panky said:
The thing in front of the radiator is a flame trap and won't be doing anything where it is. Originally it would have been connected to the pipe that you've shown coming off the rocker cover and then into the air filter so fumes could be drawn into the engine. The pipe from the rocker cover will probably drip a little bit of oil as the engine vents so needs to be low down and can be re-routed around your new inlet duct
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Ahh. The pipe runs all the way to the front and was plonked on the shelf bit under bottom grill. I moved it to take pic. With the balls up I’m making of the carb bit I may leave it be for the moment lol. Thanks for info
 
Yes the filer should be the way up you've shown, the big hole slightly off-centre to the bottom.
I'm pretty sure the ports on the carb should be within the filtered area so to equalise the pressure across the port and the inlet to carb. There would be a slight difference between atmospheric pressure and that inside the filter because of the vacuum pulled as you accelerate and this would affect the operation of the carb piston slightly, not sure by how much.

Here's a pic of the elbow normally fitted to the HIF44, you can see how the casting is shaped to the ports.

dU6J1px.jpg


Is there enough meat on your new elbow to put a little cut across the face to allow to ports to connect with the inlet? Or, even simpler, cutting a piece out of the gasket in the appropriate areas could be enough.
 
Looking at the picture of your new elbow again (very nice by the way) a couple of cut-outs in a thickish gasket will do the job.
 
Had a chat with my garage and holes should be at face, no tubes etc. The guys are going to make a second plate to sandwich between to give me cutouts like pic you sent. So easy fix thankfully. I am obviously not the god like mechanic I thought I was lol. Thanks:)
 
That great, but have a look at my last post, you may have missed it, even easier fix:)
 
Lol didn’t even think of cutting the rubber out. They have it now so will let them carry on and not mess them about cos they are helpful and have squeezed it in before weekend. I will sort out that pipe end as well
 
Do you by any chance know the length of the heater pipes? Engine to heater. And if they need bends? I assume 16mm id? But we all know what happens when I assume lol
 
Good idea to keep on terms with a trusted garage.
Sorry don't know the length of the pipe but pretty sure it's 1/2" inside diameter and all in one piece.
 
The guys making the flange are stainless fabricators for factories etc but will do the odd little job when they gave time. Sure there will be other times I need them lol. Cool thanks I will see if Martin knows lenghts. Thanks
 
And finally all fitted. My plan was faultless apart from the small issue tgat my reality isn’t the same as the rest of the world and my dimensions seem to be a different scale as well lol. The stainless flange thing ended up costing quite a bit as it was altered 3 times. The silicon hoses etc were massive but botched with bends And clambering about for a day it’s up and runningB95A3F0D-F849-454D-97B9-2A3BF893345A.jpegC1C76713-EFE8-491D-B1E9-7961101B9799.jpeg76077591-985F-4299-A220-E323068A7118.jpeg103502E3-DAF5-4501-B292-AC55FE86F401.jpeg04552224-2836-49C0-916D-3A264B6D1CBB.jpeg
 
Blimey, are you strapping a turbo to that inlet duct - them's some serious fasteners;). Looks the business tho', top job:cool:
 
Just catching up with this thread. Looks like you have done a fabulous job Sooupdragon! :cool:
 
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