 Fuel line routing for carbed 6 cylinder, should I run it like the Djet set up? |
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| Krieger |
 Apr 30 2011, 03:01 PM
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#1
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Advanced Member  Group: Members Posts: 4,723 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None 
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So I have a set of tangerine racing fuel lines installed. Should I route the fuel in the engine compartment so that that it flows from one carb to the other, then to a pressure regulator, then return fuel to tank?. It looks like originally the fuel lines dead end at each Weber.
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Replies(1 - 7)
| euro911 |
Apr 30 2011, 08:32 PM
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#2
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California
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If using a pressure regulator, install it before connection(s) to carbs. If there is only a single inlet to each carb, use a brass 'T' on the output from the regulator and a hose to each carb.
Personally, I don't like using pressure regulators if I can help it. We just removed a high pressure (FI) pump and installed a new 3.5psi pump, a 'T' and blocked off the return line to the tank. |
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| campbellcj |
Apr 30 2011, 10:12 PM
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#3
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I can't Re Member Group: Members Posts: 4,547 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California
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I've got a similar setup to Mark's although with AN-6 braided lines, alloy tee and PMO fuel bars. Just got rid of the troublesome Holley regulator which my mechanic says is unnecessary anyway on my car (track use). We chatted about putting in a return line and may do it someday, but I've done without one for like 9 years now.
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| Krieger |
May 1 2011, 08:27 PM
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#4
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Advanced Member Group: Members Posts: 4,723 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None
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Thanks guys, I don't know why I had it in my head to do a return line.
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| campbellcj |
May 1 2011, 10:21 PM
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#5
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I can't Re Member Group: Members Posts: 4,547 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California
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QUOTE(Krieger @ May 1 2011, 07:27 PM)  Thanks guys, I don't know why I had it in my head to do a return line. I still think a return line is desirable/beneficial, but numerous cars seem to do just fine without one...your choice |
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| brant |
May 1 2011, 10:28 PM
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#6
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914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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A return line is good for power (at least theoretically)
lots of ways to route this: Attached thumbnail(s)  Attached image(s) 
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| Krieger |
May 2 2011, 06:58 AM
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#7
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Advanced Member Group: Members Posts: 4,723 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None
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Thanks Brant, that's really cool. Looks like the rectangle is pump, circle filter, hex/triangle pressure reg? I was thinking option e, but maybe D
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| brant |
May 2 2011, 11:05 AM
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#8
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914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains
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you got the symbols right
I can't take credit for the drawing I've run 3-4 different ways it also depends if you are carbed or fuel injection you don't want high pressure pushing against a carb needle and seat really (although with the right pump you won't have that high pressure really) with carbs, you want to keep cool fuel flowing past them at all times more power... so I like option B and use it on my race car brant |
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