ian_perry Posted February 10, 2004 Posted February 10, 2004 Errr time for a dumb question I've got my engine in, copper fuel lines from rear of car to the engine bay TBs etc on engine - but now I'm a bit confoosed What kind of pipe/hose and couplings do I need to join copper pipe to fuel rail which has a JIC -6 fitting and fuel reg - then back to return? Seen some nice braided hose etc....... but got no idea really HELP! TIA Ian Quote
Nick M Posted February 10, 2004 Posted February 10, 2004 Where is the high pressure fuel pump ? I fear the copper pipe may need to go unless it's being used to feed a swirl pot in the engine bay. You won't be able to use jubilee clips or that sort of fitting for high pressure fuel applications. You might be able to find some fittings which are called something like tube nuts, but you would probably need to copper pipe to be exactly the right size and be able to flare the end at the right angle (usually 37 degrees). Quote
ian_perry Posted February 11, 2004 Author Posted February 11, 2004 Cheers Nick, Mmmm the high pressure pump is in the diff bay So I think I understand what u are saying. I'm gonna need to take braided type hose with the correct -6 fittings from the pump to the feed side of the fuel rail? Looks like I might have to take the engine out..........again If I mount my pressure regulator directly to the fuel rail could I keep the copper pipe + rubber hose on the return run to the tank? Errr righty ok, / coggs goin round in head / am I thinking of the correct hose to use - I've seen some Goodridge 200 hose in the Merlin catalogue is this the stuff? Do the fittings require special tools to fit them? Thanks for the help! If it was all striaght forward it would'nt b a challenge would it! Quote
Nick M Posted February 11, 2004 Posted February 11, 2004 Firstly, you'll still have highish pressure fuel *after* the fuel pressure regulator. Still questionable, IMO, for jubilee clips. Better safe than sorry would be my approach. Secondly, you don't *need* braided hose. Aeroquip FC322 hose from Think Automotive is perfectly adequate and uses cheaper push on fittings. The hose is also much easier to work with since you can cut it with a sharp Stanley knife. I would run high pressure hose from the tank to the fuel rail and back to the tank from the pressure regulator. Some regulators don't like vibration so you may need to mount it somewhere other than the end of the fuel rail, but you might want to check for your particular one. I also don't think you'd need to remove the engine to run the hoses down the transmission tunnel and into the engine bay. Quote
Mike-SEiW Posted February 11, 2004 Posted February 11, 2004 Let me just add my 2p. If you slip on high pressure fuel hose of correct size (i.e. 8mm for 8mm copper tube) over the end of the copper tube, and use a worm drive hose clamp, and cleaned the mating surfaces of grease - it will hold up just fine. That's what I'm going to do. Nick M - yes, better safe than sorry, but have you ever mounted this on the "bench" and tried to pull them apart? It's impossible (at least I'm not that strong). The rubber hose gets an incredible grip on the copper tube, but only if it's clean and degreased first. I had made some couplings like this on my other car before and I never had them separate, despite fuel pressures of up to 150psi (I tested). However, FC322 hose and little anodised alu couplings does look porny though, I agree. Quote
Matt Seabrook Posted February 11, 2004 Posted February 11, 2004 I have copper pipe and Goodrich type hoses. The Goodrich type hose is help to the copper pipe with a hose clip this was recommended by SBD the only thing I have done is swage the end of the copper pipe a little to make the hose a tighter fit but as I understand it this is not required. Quote
Bazzer Posted February 11, 2004 Posted February 11, 2004 You could also flare the copper pipe to take a union like a brake pipe. This could screw into a male/male adaptor and onto you -6 jic fittings on your braided hose. Alternative is to use flareless fittings, they work like a plumbers compression fitting with an olive. Think Automotive stock these, I think they call them Versaflare. Cheers Bazzer Quote
ian_perry Posted February 11, 2004 Author Posted February 11, 2004 Cheers guys Things are a lot clearer now. I'll check out what Think Automotive do. Ta Ian. Quote
highwayman Posted February 11, 2004 Posted February 11, 2004 You certainly can't use jubilee clips if you want the car to pass SVA its a big no-no and you need to get fuel hose clips[/b] which are similar and approved, this includes at the either end of fuel pump and filter. dave Quote
Bazzer Posted February 11, 2004 Posted February 11, 2004 I guess that depends on which SVA centre you visit. I know of many cars that have passed SVA with standard jubilee clips on the fuel hose. I would agree however that proper fuel hose clips that don't deform shape when tightened would be better. Bazzer Quote
ian_perry Posted February 11, 2004 Author Posted February 11, 2004 Ok guy's, can someone do me a favour? Doe's anyone know - or can measure for me the o/d of the copper pipe they use to go from front to rear of their car. I'm using the stuff from B&Q. Ta . Hope it's 3/8! I'd measure it myself but I'm 120 miles away from the car Thanks Quote
Matt Seabrook Posted February 11, 2004 Posted February 11, 2004 I'm using the stuff from B&Q. Ta . ? B&Q are you sure Quote
thos Posted February 11, 2004 Posted February 11, 2004 Ok guy's, can someone do me a favour? Doe's anyone know - or can measure for me the o/d of the copper pipe they use to go from front to rear of their car. I'm using the stuff from B&Q. Ta . Hope it's 3/8! I'd measure it myself but I'm 120 miles away from the car Thanks Dunno bout the copper pipe, but my fuel hose is 5/16" (8mm). Quote
ian_perry Posted February 11, 2004 Author Posted February 11, 2004 err yep - it was from B&Q . I'm sure a few other people have used it.... I know I do a search Quote
ian_perry Posted February 11, 2004 Author Posted February 11, 2004 Righty o Done a search, here looks like I've got another problem the rigid copper pipe is 5/16. If I read the Think Automotive website correctly -6 JIC is for 3/8 tube is this correct? What's a 1/16 of an inch between friends eh? Cheers, Ian. Quote
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