SE6a USM 99T

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Post by scimjim » Sat Nov 02, 2019 4:58 pm

Looks like a composite wheel to me. A magnet will prove/disprove steel and alloy remains very shiny.


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Post by Tinker man » Sat Nov 02, 2019 6:12 pm

Magnet! Of course. Thanks Jim. Will get it checked out. Another job to be done I suspect.


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Post by philhoward » Sat Nov 02, 2019 9:51 pm

I’d be 95% certain that’s the composite wheel too.


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Post by MikeyBikey » Sun Nov 03, 2019 7:52 am

reading your thread re vapourisation.

in my gte with modded essex i never had that problem, however I fitted a low pressure electric pump (the manual one could not supply enough fuel when flat out uphill) and I has plastic fuel lines, about 10mm diameter.

on a different note why do't people for 8 or 10mm copper pipe as fuel lines? its never going to collapse and cheap as chips
I use 8mm for my lpg ,


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Post by Tinker man » Mon Nov 04, 2019 11:12 am

good morning,

yes composite after the magnet test, so needs doing when i get some spare cash and a little time (two project cars, project tilt trailer, new to me motorbike and life/work in general) :roll:

i thought about copper pipe also at one point(thanks for reminding me Mikey) with short rubber joining pieces. is there any reason not to does anyone think??

thanks, Ian.


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Post by MikeyBikey » Mon Nov 04, 2019 11:24 am

Copper pipe for fuel. Seems common sense. It’s bit of a phaff bending but a rubber mallet to take out the tension works wonders :roll:


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Post by rebel alliance » Mon Nov 04, 2019 11:59 am

It seems copper affects the Gum content of petrol....i have no idea what this means i just read it on the Interweb 😁



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Post by MrGoldtop1960 » Mon Nov 04, 2019 12:27 pm

Hi All,
I've had a copper fuel line for many years and as yet, not had any problems. After doing a search on the T'internet, I've found the attached document from BP which may be of use?
petrol-life-vehicle-tanks.pdf
(85.8 KiB) Downloaded 53 times


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Post by Tinker man » Mon Nov 04, 2019 1:29 pm

thanks for the input gents.

i agree that it sounds like it should be OK and i will be giving it a whirl... hopefully the increase in "gum" wont be an issue and if Mr Goldtop/Kev has used his lines for years then it should be fine. i have some copper line left over from the SE5a V8 project so may as well use it.

the article is interesting and thanks for sharing that. my vehicles sadly regularly sit for more than 3 weeks without use. something to be aware of if nothing else..

many thanks as always everyone, Ian.


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Post by AJL Electronics » Mon Nov 04, 2019 1:46 pm

Kunifer, not copper for fuel lines.


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Post by reliant-reviver » Tue Nov 05, 2019 8:02 am

I trust your house is plumbed in CuNiFer also Andy?

Adequately supported copper absolutely fine for fuel lines IMHO. Cheaper and much easier to form. I suspect the answer to why not people don't, is it's the difficulty of running metal lines neatly along the correct route.


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Post by Laters » Tue Nov 05, 2019 10:42 am

The previous owner of my SE6 had added cunifer/copper fuel pipes running along the chassis.
I had already replaced the rubber braided pipes he used in the engine bay as they were ageing really badly.

I thought I had replaced all the rubber pipes that needed changing till I decided to look at the electric fuel pump and the rubber pipes from the tank.
Despite looking really nice with their stainless over sheath all were on the verge of failing.

Another order to Andy (AJL) for some more of his fuel proof pipe so that its all been done then.


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Post by AJL Electronics » Tue Nov 05, 2019 1:17 pm

reliant-reviver wrote:
Tue Nov 05, 2019 8:02 am
I trust your house is plumbed in CuNiFer also Andy?

Adequately supported copper absolutely fine for fuel lines IMHO. Cheaper and much easier to form. I suspect the answer to why not people don't, is it's the difficulty of running metal lines neatly along the correct route.
15mm domestic Cu is rigid and not subject to vehicular vibration. Narrow bore Cu is not so rigid and as you say, needs to be correctly clipped to avoid it fracturing. Kunifer is less fussy about poor workmanship so I stand by my recommendation. For the few pennies extra cost, why wouldn't you?


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Post by reliant-reviver » Tue Nov 05, 2019 3:32 pm

A largely tongue in cheek comment, but knowing how some heating systems "hammer" away often with large unsupported spans they can hardly be considered static. Not vehicular vibration granted but nonetheless.

Most garages will replace brake pipes and fuel lines with plain copper when tasked with the job, yet we don't hear of countless horror stories. Sure, in theory not the right material for say a sliding slave cylinder, but in the real world using copper lines in an automotive application is common and sufficiently risk free to remain credible.

As already mentioned, it's the workability of copper that makes it preferable. Did the front to back brake lines on my daily earlier in the year, would like to see you do it in cunifer without dropping a heck of a lot of components off the body.


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Post by reliant-reviver » Tue Nov 05, 2019 3:50 pm

But yes. Wearing my sensible online advice hat CuNiFer is of course the better material to use in all automotive applications.

I think there is also a discussion to be had about what the material content of pipe marketed as "copper" actually is, I have heard that the majority of what is available is some form of copper alloy anyway.

Anyway let's not derail the thread! :w


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