 Fuel lines and twin carbs |
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| JFG |
 May 22 2016, 09:41 AM
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Senior Member  Group: Members Posts: 686 Joined: 7-April 16 From: Wales Member No.: 19,869 Region Association: None  |
I am fitting twin IDF 40's to my 1.7 engine (it came as a rolling shell) and need to change the fuel lines from front to back.
Do I need to install a return line? What size outside and\or internal diameter are the standard lines? I'm going to make my own using stainless steel and need the specs to buy the correct pipes. Finally. Do I need to tap a vacuum take off into the manifolds for the distributor? |
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| stugray |
May 26 2016, 10:27 PM
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Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
Install them both.
If you decide to not use the second tube, use it as a conduit to run wires from the back to the front under the tank for the best pump location. I run a Holley redtop in the front with an adjustable pressure regulator (non-return style) in the rear above where my relay board used to be. It goes to the driver's side carb IN, then the OUT goes over to the pass side carb. The holley is loud and overkill. I have heard that carters are just as good quality & longevity wise, but cost less and quieter. Many get by with a non-regulated facet pump. |
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Posts in this topic
JFG Fuel lines and twin carbs May 22 2016, 09:41 AM
Dave_Darling Some pumps do not require a return line. Some do.... May 22 2016, 11:41 AM Hans Jan I installed the supply line from Chris (Tangerine)... May 26 2016, 08:27 PM brant All manufactures use return lines
Cooler circulato... May 27 2016, 08:39 AM
JFG 5 years sine I last owned an air-cooled, I'm s... May 27 2016, 02:04 PM |
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