If I can find some 5/16" steel bundy for a new fuel line how do I get on for the rubber tube to connect each end - do I use 5/16" or force 1/4" on? The bayonets for the carby and fuel pump are 1/4" so would need 1/4 to be a snug fit and the hole through the boot floor was designed to take 1/4" tube.

Another thought - can you use aluminium tube for fuel line?

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David L


My greatest fear in life is that when I die my wife will sell my Mini and tools for the price I told her I paid for them!

No don't use Aluminium. It doesn't "wear" and will just break after time due to vibration.

Why are you going to 5/16 fuel line if your carbs can only support 1/4? you're better off trying to throw in a phat electronic fuel pump (by phat i mean large capacity, high pressure) with a pressure regulator and that should solve most of your problems. If you change to 5/16 line and run the std 1.5psi crappy pump, it defeats the purpose of changing to larger fuel line.

If you really have fuel starvation issues due to excessive engine power output then your 1/4 feed carbs need to be looked at first...

Can you change the bayonet on the carn to 5/16?

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Lillee - 1969 Morris Mini K

I used 5/16" line from the Facet pump and 5/16 barb fittings. It's flow volume (from less restriction) you want, pressure has nothing to do with it.
I used 1/4" Dayco USA fuel hose from the 2 tanks to a tee, then 5/16" Dayco USA fuel hose from there to the Facet square pump, and from there onto the 5/16" steel line.

IMO all a big pump with regulator will do on an N/A car is give something else to go wrong.
The Facet works fine for me with either twin SUs or a Weber/Dellorto.

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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.

Really? So why is it used in all the top drag cars?
ANDRA must have it all wrong.

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Too many cars, and too little time.

My guess would be that the top drag cars are not driving on the road day in and day out. They do very short runs. Then the cars are checked over and mostly rebuilt after each set of runs.

Ryan

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Ryan Filippi
Minis In The Gong
[email protected]
www.minisinthegong.com.au

im fitting alloy fule tube to my car??
i was told it was ok to do so.
its being mounted with rubber mounted clips so im hoping it will be ok....cant see it cracking too soon..
interesting...

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started a new project...there goes all my free time....

With aluminium (as with most metals) it is the alloy grade and the hardening process that makes it suitable for a particular application.
I intend using it on my next project:
http://www.chrismillsperformance.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=90&category_id=79&manufacturer_id=0&option=com_virtuemart&Itemid=30

The supporting must be done properly though - minis do not have fuel or brake lines supported as per the requirements of the current ADRs

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Too many cars, and too little time.

OK you go and use aluminium. I'll stick with steel...

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Lillee - 1969 Morris Mini K

From working with air con systems in cars i have noticed that a rubber hose will wear a hole into aluminium pipe, not the other way round.
Just make sure it is not subject to vibration.

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Dean Hutton's first car was a Mini.

I've seen rubber wear through 10mm thick plate.
It has very good resistance to abrasion, otherwise I suppose they'd make tyres out of something else.

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Too many cars, and too little time.

I have seen steel brake pipes break due to harmonic vibrations, this was on well supported pipes running very short lengths.
I would hate to see what would happen to aluminium pipe under similar vibrations.

Aluminium tube is common enough in Air Con units, I know of nothing else which vibrates quite as much (except perhaps a brushcutter powered dildo).

However, air con failing is one thing, brakes are another (for no difference in feel, performance or appreciable gain in weight). Not worth the pain, let someone else spear in with no pedal.

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SooperDooperMiniCooperExpertEngineering

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

I would guess that the pressure inside the pipe would dampen out some vibrations. Pipes that fail are usually under no or very little pressure.

is this 5/16" I.D. or O.D. tube?

OD.
Tube is measured OD, unlike steel water pipe etc.

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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.