Can anyone explain the Stag fuel pipes to me ?
If we follow the line from the back of the car to the front there is a metal outlet on the tank which goes into a rubber connection to a plastic pipe up to the pump. From there a plastic pipe comes across and out of the boot to go into a rubber connector into the main metal pipe under the car. At the front, this goes into another rubber connector and into a plastic pipe that goes the short distance up to the filter via a 90 degree rubber connector.
From there on, it gets even more complicated. A rubber pipe comes across from the filter above the cam cover and then onto a T piece. A rubber pipe from the T piece feeds the left hand carburettor and another rubber pipe heads towards the right hand carburettor. But does it go straight onto the carburettor ? Nah, don’t be silly ! It connects to a short section of metal pipe which then connect to a rubber 90 degree elbow that then goes onto the carburettor – phew !!
And all of that doesn’t even mention the assorted clips etc and even the fact that some connections don't seem to even have a clip
I can’t help but think that it is all unnecessarily complicated – for example, why not just have one pipe from the filter to the T piece with rubber pipes from the T piece directly to both carburettors ?
So, why am I asking ? Well, I noticed that my underbonnet rubber pipes were beginning to perish after just 3½ years and 12,000 miles
and so decided to renew things. The pipe that came from Robsport was marked 5.6mm, whereas the one I took off was marked ¼”. Ok, not a lot of difference but it was damned hard to get it onto the new fuel filter – Oh, that, according to Peter at LD has a ¼” inlet, but a 5/16” outlet. Oh and I'm not even sure where one of the pipes goes 
It's a: “Straight reducer connector, not original but 2 1/2 inches long as original. Also 153300 Connects T piece 157892 to carburettors. 1/4 ID one end and 3/16 ID the other.
Note - Externally this is parallel and does not have a central taper as the original type. The Outside Diameter is 1/2 inch so this needs noting if buying clips”
And what’s with the three different colours/sizes of clips ?? Again, Peter says, of the various 3/8”, 7/16” and ½” clips, “This type of clip is designed to expand with underbonnet temperatures whilst maintaining the same clamping force” – surely there can’t be a lot of heat expansion on such a small item ?
Well, at the end of this all, my question is, what ID and OD pipes have people used on theirs and have they fitted easily onto the fuel filter and carburettors and have people done it exactly as per the ROM ?
Cheers
Julian
From there on, it gets even more complicated. A rubber pipe comes across from the filter above the cam cover and then onto a T piece. A rubber pipe from the T piece feeds the left hand carburettor and another rubber pipe heads towards the right hand carburettor. But does it go straight onto the carburettor ? Nah, don’t be silly ! It connects to a short section of metal pipe which then connect to a rubber 90 degree elbow that then goes onto the carburettor – phew !!
And all of that doesn’t even mention the assorted clips etc and even the fact that some connections don't seem to even have a clip
I can’t help but think that it is all unnecessarily complicated – for example, why not just have one pipe from the filter to the T piece with rubber pipes from the T piece directly to both carburettors ?
So, why am I asking ? Well, I noticed that my underbonnet rubber pipes were beginning to perish after just 3½ years and 12,000 miles
and so decided to renew things. The pipe that came from Robsport was marked 5.6mm, whereas the one I took off was marked ¼”. Ok, not a lot of difference but it was damned hard to get it onto the new fuel filter – Oh, that, according to Peter at LD has a ¼” inlet, but a 5/16” outlet. Oh and I'm not even sure where one of the pipes goes It's a: “Straight reducer connector, not original but 2 1/2 inches long as original. Also 153300 Connects T piece 157892 to carburettors. 1/4 ID one end and 3/16 ID the other. Note - Externally this is parallel and does not have a central taper as the original type. The Outside Diameter is 1/2 inch so this needs noting if buying clips”
And what’s with the three different colours/sizes of clips ?? Again, Peter says, of the various 3/8”, 7/16” and ½” clips, “This type of clip is designed to expand with underbonnet temperatures whilst maintaining the same clamping force” – surely there can’t be a lot of heat expansion on such a small item ?
Well, at the end of this all, my question is, what ID and OD pipes have people used on theirs and have they fitted easily onto the fuel filter and carburettors and have people done it exactly as per the ROM ?
Cheers
Julian
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