re fuel pipes.

[grizzly_a58]

hi guys , posted same question in pilgrim forum, but thought i woulkd try closer to home as well. do i need to connect up the return pipe to my tank. or can i get away with just the feed. its a rover 3.5, twin su's running facet 5 to 6 psi pump what do you think. would suit me better with one pipe. but will it cause problems. if ok what do i do with the return pipe from the second carb. do i just blank it off, will it harm my carbs, i am lost. but hey? aint i allways. cheers grizz.

[alfiebeard]

Originally Posted by grizzly_a58

hi guys , posted same question in pilgrim forum, but thought i woulkd try closer to home as well. do i need to connect up the return pipe to my tank. or can i get away with just the feed. its a rover 3.5, twin su's running facet 5 to 6 psi pump what do you think. would suit me better with one pipe. but will it cause problems. if ok what do i do with the return pipe from the second carb. do i just blank it off, will it harm my carbs, i am lost. but hey? aint i allways. cheers grizz.

Hi Grizz,
My Sumo has a 390 Holley 4 barrel on it and uses a Facet pump and is only using one pipe and is perfectly happy no flooding of carb etc, the holley does,nt use a return, but my mates Dax has SU carbs and he has the return blanked off and he is using a Facet pump ,and he,s had no probs.I think the old SU needle valves will hold back 6 PSI ok.It certainly wont damage the carbs the worst that can happen is they may flood on tickover,give it a try and if they flood connect up the return.

HTH

[grizzly_a58]

hi alfie, cheers for that , i will give it a try, will still need to get some sidepipes tho, its a bit noisy with out them, and its not running very well just now, cant tune it till i get the pipes, so if you know any good suppliers, give me a shout. grizz.

[Stu J]

Originally Posted by grizzly_a58

hi alfie, cheers for that , i will give it a try, will still need to get some sidepipes tho, its a bit noisy with out them, and its not running very well just now, cant tune it till i get the pipes, so if you know any good suppliers, give me a shout. grizz.

Hi Grizz, I bought some 4" pipes about 3 months ago and paid 730.00 with headers from custom chrome in nuneaton. Quality

[brian twigg]

Hello, I'm not a Cobra builder, but I have built two kits.
In my opinion, you would be better to fit a flow and return pipe to your carburetors for the following reasons.
1) there will be a continuous flow through the pipes so you will never suffer from vapour locking.
2)You carburettor will only take the amount of fuel you require so are unlikely to suffer flooding from over pressure.

If the thoughts of running two pipe with it's attendant clipping work is your reason, remember that one hole can support two clips.

If cost is a consideration, you can purchase a 10mtr roll of copper 8 or 10mm pipe from B&Q etc for not a lot of money.

It is worth purchasing the appropriate size olives for the pipe used and sweat one at the end of your hard pipe runs so that the rubber petrol hose has a good purchase when you tighten your hose clips.

Brian.

[grizzly_a58]

hi brian , thanks for the reply. the reason i was asking about the pipes was, maybe i am just to fussy, but, the rout for the pipes everyone seems to take is down the outside of the chassis leg passenger side. ok good but? i dont want to see the fuel pipe showing in front of the rear wheel where it starts the run to the front. i was hoping to fill in the rest of the rear wheel arch at the front off the rear wheel, so you cant see right up the sill ,if you know what i mean, also, i thought what if somthing goes wrong with the fuel pipe and you need to replace it, what chance have you got ,trying to get to the pipe when the body is on. ok , i know i am being a bit paranoid, but ? so i thought i would run it down the inside chassis leg to the front , but inside the car. the reason i was asking about the feed and return was, the bloody seat belt fixing point on the inside is just a bit to close to the pipes, one would be ok, two will be a bit tight, am i being paranoid, cheers grizz.

[alfiebeard]

Originally Posted by grizzly_a58

hi brian , thanks for the reply. the reason i was asking about the pipes was, maybe i am just to fussy, but, the rout for the pipes everyone seems to take is down the outside of the chassis leg passenger side. ok good but? i dont want to see the fuel pipe showing in front of the rear wheel where it starts the run to the front. i was hoping to fill in the rest of the rear wheel arch at the front off the rear wheel, so you cant see right up the sill ,if you know what i mean, also, i thought what if somthing goes wrong with the fuel pipe and you need to replace it, what chance have you got ,trying to get to the pipe when the body is on. ok , i know i am being a bit paranoid, but ? so i thought i would run it down the inside chassis leg to the front , but inside the car. the reason i was asking about the feed and return was, the bloody seat belt fixing point on the inside is just a bit to close to the pipes, one would be ok, two will be a bit tight, am i being paranoid, cheers grizz.

Certainly does,nt sound paranoid to me ,my fuel pipe is run inside the chassis through the inside of the car, less chance of damage and a bit neater, the guy who knows mounds about sidepipes is Pete (sidecarbod) very helpfull bloke and he has modified his sidepipes in a post somewhere on here, One word of warning though dont buy Pilgrim pipes new or old they are crap.
HTH

[mylesdw]

Originally Posted by brian twigg

...you would be better to fit a flow and return pipe to your carburetors for the following reasons.
1) there will be a continuous flow through the pipes so you will never suffer from vapour locking.
2)You carburettor will only take the amount of fuel you require so are unlikely to suffer flooding from over pressure.

If cost is a consideration, you can purchase a 10mtr roll of copper 8 or 10mm pipe from B&Q etc for not a lot of money.

It is worth purchasing the appropriate size olives for the pipe used and sweat one at the end of your hard pipe runs so that the rubber petrol hose has a good purchase when you tighten your hose clips.
Brian.

Whether you have a return line or not you still need some positive fuel pressure at the carbs or they will fill too slowly. The return line is as you say a good idea, if you stick with the 5 psi regulated pump just run the return line in one size smaller pipe than the feed.

The B&Q pipe is (I believe) really central heating microbore pipe. It is not really a good idea to use pure copper pipe where vibration is as issue since it work hardens and cracks. This is why various countries (including NZ) don't allow copper brake pipes. The pukka stuff to use if cupro-nickel pipe, sold under the trade name Kunifer-10.

[grizzly_a58]

hi guys, am i the only one on this site, or should i say the only poor bas#### with problems, gee now i feel alone. lol. time for another beer. cheers grizz.