Quote:
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.