Fuel line connectors.

Topics related solely to the Middlebridge Scimitars

Moderators: scimjim, philhoward, erikscimitardemon, Roger Pennington, Lukeyboy46

Post Reply
simmit
Posts: 390
Joined: Sat Nov 14, 2015 3:33 pm
Has thanked: 108 times
Been thanked: 7 times

Fuel line connectors.

Post by simmit » Mon Jul 25, 2016 9:58 pm

MB50 may be typical or not but it had two black plastic push on fuel connectors to the copper pipes. I had been changing the fuel hoses to meet latest fuel specification when I found these connectors (not knowing at first whether they were simply connectors or something technical to do with the fuel system). Anyway, having discovered they were simply connectors I assumed they must have sealing 'O' rings in them and perhaps the modern fuel might be affecting them so I removed the connectors (cut them off) and had them apart to check condition of the 'O' rings. They were hard and brittle and I'm glad they are now off the car as potential fuel leaks make me nervous.
Not suggesting there is a problem generally but thought it worth a mention here.



User avatar
philhoward
RSSOC Member
Posts: 23360
Joined: Tue Aug 29, 2006 5:41 pm
Location: Staffs, UK
Has thanked: 37 times
Been thanked: 460 times
Contact:

Re: Fuel line connectors.

Post by philhoward » Mon Jul 25, 2016 10:03 pm

I'd be more worried about the use of Copper for fuel lines myself?


Phil Howard
Scimitarweb Forum Admin
SS1 1600 Rooster Turbo; Sabre Mk1.5, Sabre Mk2
Previous: SE5/5a/SS1 No.1/SS1 Rooster/SS1 1800Ti/SE5a 24 Valve
http://www.ss1turbo.com
Never try and argue with an idiot. They drag you down to their level, then beat you based on experience.

simmit
Posts: 390
Joined: Sat Nov 14, 2015 3:33 pm
Has thanked: 108 times
Been thanked: 7 times

Re: Fuel line connectors.

Post by simmit » Mon Jul 25, 2016 10:16 pm

philhoward wrote:I'd be more worried about the use of Copper for fuel lines myself?
Do you think copper may age harden and crack? What would be your alternative? What do they use on modern vehicles?



User avatar
philhoward
RSSOC Member
Posts: 23360
Joined: Tue Aug 29, 2006 5:41 pm
Location: Staffs, UK
Has thanked: 37 times
Been thanked: 460 times
Contact:

Re: Fuel line connectors.

Post by philhoward » Mon Jul 25, 2016 10:21 pm

No "may" about it - it will crack if subject to the slightest vibration.

Nylon has been in use for nearly 50 years for fuel lines.


Phil Howard
Scimitarweb Forum Admin
SS1 1600 Rooster Turbo; Sabre Mk1.5, Sabre Mk2
Previous: SE5/5a/SS1 No.1/SS1 Rooster/SS1 1800Ti/SE5a 24 Valve
http://www.ss1turbo.com
Never try and argue with an idiot. They drag you down to their level, then beat you based on experience.

User avatar
AJL Electronics
Posts: 7325
Joined: Fri Oct 17, 2008 8:49 pm
Location: Gloucester
Has thanked: 38 times
Been thanked: 199 times
Contact:

Re: Fuel line connectors.

Post by AJL Electronics » Mon Jul 25, 2016 10:25 pm

If you need rigid fuel line, then it has to be Kunifer.


Yes, we can mend your Scimitar!
Order your Scimitar parts any hour of the day at http://www.classicmicrocars.com (member's discounts).

Fancy a holiday in Gael, France? http://www.ianrhu.com

There is no point trying to teach a pig to sing. It doesn't work and it annoys the pig.

User avatar
philhoward
RSSOC Member
Posts: 23360
Joined: Tue Aug 29, 2006 5:41 pm
Location: Staffs, UK
Has thanked: 37 times
Been thanked: 460 times
Contact:

Re: Fuel line connectors.

Post by philhoward » Mon Jul 25, 2016 10:30 pm

Steel has been used for many years but I wouldn't choose it myself. If you need a rigid line, then Kunifer for sure. I find Nylon more than adequate personally, as do most vehicle manufacturers these days.


Phil Howard
Scimitarweb Forum Admin
SS1 1600 Rooster Turbo; Sabre Mk1.5, Sabre Mk2
Previous: SE5/5a/SS1 No.1/SS1 Rooster/SS1 1800Ti/SE5a 24 Valve
http://www.ss1turbo.com
Never try and argue with an idiot. They drag you down to their level, then beat you based on experience.

User avatar
toomanysabres
RIP
Posts: 5388
Joined: Sun Nov 12, 2006 2:27 pm
Location: Leatherhead
Has thanked: 14 times
Been thanked: 88 times

Re: Fuel line connectors.

Post by toomanysabres » Tue Jul 26, 2016 12:19 am

I have used Kunifer (truck size brake pipe) for years.


Now: '62 Sabre 4, '63 Sabre Six, '65 SE4, '00 BMW E38 740i sport.
Prev: '53 ZephyrZodiac, '64 Sabra GT, '68 Elan S3SE, Mk3 Cortina 2000GXL, Mk4 Cortina 2000 Est, 3 SE6a's, 2 SE5a, SE4a Turbo, 1800Ti.
Company: Cav SRi, Cav SRi 130, Honda Concerto 1.6 (yuk)

simmit
Posts: 390
Joined: Sat Nov 14, 2015 3:33 pm
Has thanked: 108 times
Been thanked: 7 times

Re: Fuel line connectors.

Post by simmit » Tue Jul 26, 2016 2:13 pm

Did MB use copper or Kunifer (or what) in their builds? I said copper because the pipe has copper colouring but it may be Kunifer, you guys know better than I.



User avatar
AJL Electronics
Posts: 7325
Joined: Fri Oct 17, 2008 8:49 pm
Location: Gloucester
Has thanked: 38 times
Been thanked: 199 times
Contact:

Re: Fuel line connectors.

Post by AJL Electronics » Tue Jul 26, 2016 2:14 pm

Standard is nylon.


Yes, we can mend your Scimitar!
Order your Scimitar parts any hour of the day at http://www.classicmicrocars.com (member's discounts).

Fancy a holiday in Gael, France? http://www.ianrhu.com

There is no point trying to teach a pig to sing. It doesn't work and it annoys the pig.

simmit
Posts: 390
Joined: Sat Nov 14, 2015 3:33 pm
Has thanked: 108 times
Been thanked: 7 times

Re: Fuel line connectors.

Post by simmit » Wed Jul 27, 2016 9:49 am

AJL Electronics wrote:Standard is nylon.
MB50 definitely not nylon. What grade nylon is specified for fuel lines and can you suggest source for tube and fittings (in particular, hose tail to rubber hose)?



User avatar
AJL Electronics
Posts: 7325
Joined: Fri Oct 17, 2008 8:49 pm
Location: Gloucester
Has thanked: 38 times
Been thanked: 199 times
Contact:

Re: Fuel line connectors.

Post by AJL Electronics » Wed Jul 27, 2016 10:38 am

If you are starting from scratch, then just go with 5/16" Kunifer. Flare the ends where it changes to rubber. Make sure it is well supported, even though it is not as bad as copper, you don't want bits vibrating.


Yes, we can mend your Scimitar!
Order your Scimitar parts any hour of the day at http://www.classicmicrocars.com (member's discounts).

Fancy a holiday in Gael, France? http://www.ianrhu.com

There is no point trying to teach a pig to sing. It doesn't work and it annoys the pig.

simmit
Posts: 390
Joined: Sat Nov 14, 2015 3:33 pm
Has thanked: 108 times
Been thanked: 7 times

Re: Fuel line connectors.

Post by simmit » Wed Jul 27, 2016 3:40 pm

AJL Electronics wrote:If you are starting from scratch, then just go with 5/16" Kunifer. Flare the ends where it changes to rubber. Make sure it is well supported, even though it is not as bad as copper, you don't want bits vibrating.
Thanks.



User avatar
nickkeyser
RSSOC Member
Posts: 2744
Joined: Thu Aug 28, 2008 2:58 pm
Has thanked: 17 times
Been thanked: 20 times

Re: Fuel line connectors.

Post by nickkeyser » Wed Jul 27, 2016 6:42 pm

What about aluminium? Seems the most common in the aftermarket.


Image
"Simplfy, then add lightness" - Colin Chapman

Post Reply

Return to “Middlebridge”