(1) What is the size (diameter) of the metal fuel line pipe that runs under the mini?
(2) Is Bigger than standard worth getting?, I will be bending and flaring the pipe myself.
(3) Is their a special type of pipe I should get?
And finally, (4) is it legal to run the fuel and break lines inside the cab of a road registered mini?.

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(1) What is the size (diameter) of the metal fuel line pipe that runs under the mini?

1/4 inch steel tube

(2) Is Bigger than standard worth getting?, I will be bending and flaring the pipe myself.

5/16 if you are going to be racing with a thirsty carb setup according to Vizard. Doesn't need to be flared, and it may be bent without a bender if careful, but one helps to get a nice professional finish.

(3) Is their a special type of pipe I should get?

Steel bundy tube from places like ABS wil get the job done.

And finally, (4) is it legal to run the fuel and break lines inside the cab of a road registered mini?.

Hmmmm....I don't think so, but not sure...

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

(1) 1/4" OD.
(2). If going for more than 110HP I would replace it with 5/16" OD. There are no flares on it I can think of...
(3) Steel fuel line, it's sold by the metre. I got mine from Robbo's Spares.
(4) I don't think, so but stand to be corrected.

<edit> it's not really Bundy (properly spelt, `Burndy' tube) which is wrapped in 2 layers and bronze welded together. It's just round, thin steel tube, plated..

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

same here.
I got bundy from brake place (8mm)

Its not legal to run it inside the car.

Pete

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Yeah I didn't think it was legal but worth a shot I think I will just go for some 1/4 stuff in the "Burndy" pipe.
Thanks.

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Respect mine and I'll respect yours.

The Early VW Golf used to have Fuel and Brake lines running under the carpet and sound proofing. They were still approved for Ausstralian market. I quite like the Idea and it is just as safe providing you do not have any joins inside the Cab. I used to have my speedway Mini like that.

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The ADR's and safety rules dont allow fuel lines running through the cabin - unless the car was manufactured that way (Eg/ the VW) or it is engineered to be safe - no, sometimes they dont make sense but thats what they say.

Just like braided lines or braided brake lines, etc full race spec better than normal hose and they wont let them through... because you cant see if they are split or not...

Racecars, speedway, etc can do what the race rules say, very different.

Pete

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It is definately spelt "BUNDY" The process was developed by British Tube Mills during WW2 as a replacement to copper tube. It is a steel strip that is copper plated then coated in tin and rolled to form a tube and then passed thru a furnace to melt the tin and seal it.
It is made in 2 layer to 11 layer[diesel injector tube]
It requires a double "cox head" type of flare or it will split.
The world market was supplied by BTM sth aust for many years ,but it is now made in most countries now except for Aust.

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OK sorry I spelt it wrong, my point was that fuel line isn't made that way, it's just plain old soft steel tubing.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

David, not at all questioning your knowledge however when I ran my bundy tube I didnt flare it, I am using as fuel line so prolly dont need anything flared as the fuel hose (rubber) goes over the top (slips on) and a clamp is screwed over it...

If using for brakes (as the tube is intended) I am sure you must flare it, etc...


Pete

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Picked up 2 meters today for $14. Now to install it, and I was only going to flair the ends to give the rubber pipe something to grip on to but if it starts splitting I will just leave it straight.

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Respect mine and I'll respect yours.

If you are only flaring the tube to clamp a rubber hose onto then it will be o.k. to use a single flare.It only needs to be a small ridge.
The only time you need double flare is if a fitting is used to attach pipe.
When bending tube use a pipe bender as the tube has problem with cracking and kinking during forming.
I have had plenty of experince with this type of tube, my father was head design engineer for BTM/bundy for 40 years and designed the new grades of tube and manufacturing machines.
Now we get it from bundy tube china

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Research is the difference between speculation and investment. Anyone who copys some one else will always be second
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How does one create the flare often used on ends of plane tube to hole rubber tube on?

I mean the one where it bulges the tube outward slightly just up from the end a little?

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

Another Q how tightly can the 1/4" be bent?

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Respect mine and I'll respect yours.

My bender (from BOC Gas & Gear) will pull it round a 25mm radius.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.