Fuel line port
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,601
Likes: 7,047
From: New Or-leens Loo-z-anna
Rookie guess: a return line at that location would possibly starve the carb.
If a fuel pressure regulator/w return port was installed there, then you could adjust the pressure going to the carb by regulating/re-directing excess fuel to the gas tank (which is a "reverse way" of using a regulator).
Does your fuel pump supply the exact pressure that your carb requires?
If a fuel pressure regulator/w return port was installed there, then you could adjust the pressure going to the carb by regulating/re-directing excess fuel to the gas tank (which is a "reverse way" of using a regulator).
Does your fuel pump supply the exact pressure that your carb requires?
Thread Starter
Instructor
Joined: Jun 2012
Posts: 170
Likes: 29
From: Somewhere over the rainbow
Not sure about the fuel pump, probably pushes like 8psi like most pumps that I've seen online. The carb I believe requires like 5 to 6. It's a brawler 750 double pumper
Last edited by xMrFacex; Jun 24, 2021 at 12:57 AM.
Thread Starter
Instructor
Joined: Jun 2012
Posts: 170
Likes: 29
From: Somewhere over the rainbow
No they just built it and gave me instructions about breaking in the engine with conventional oil and to change it at a like 200 miles
Edit:
I also have tried emailing them but I don't think they are going to get back to me at this point.
Edit:
I also have tried emailing them but I don't think they are going to get back to me at this point.
Last edited by xMrFacex; Jun 24, 2021 at 01:19 AM.
Race Director
Joined: Mar 2017
Posts: 11,953
Likes: 4,510
From: Virginia
Maybe you can find the exact fuel line they used on eBay, but here's the relevant description from a similar setup.
https://www.ebay.com/i/222466251530?....c100677.m4598
https://www.ebay.com/i/222466251530?....c100677.m4598
Originally Posted by RandomEbaySeller
You are buying the fuel inlet line assembly.
This is a -06 an fuel inlet line kit for Holley Dual Feed 4150 series carburetors with 7/8-20 bowl inlet fittings and 9 5/16 center to center distance. This inlet line is equipped with show polished Red fittings and 30R9 steel braided hose with a 1/8" npt port in the tee fitting just in case you want to install a gauge to check you fuel pressure.
This is a -06 an fuel inlet line kit for Holley Dual Feed 4150 series carburetors with 7/8-20 bowl inlet fittings and 9 5/16 center to center distance. This inlet line is equipped with show polished Red fittings and 30R9 steel braided hose with a 1/8" npt port in the tee fitting just in case you want to install a gauge to check you fuel pressure.
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Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Since it is -6 AN...you can easily add a -6 inline filter like the one from Summit that is 10 micron......
https://www.summitracing.com/parts/sum-230142
After replacing multiple crap small fuel pressure gauges.....I bought this AED piece and it is sturdy with a real glass sight glass......
https://www.summitracing.com/parts/aed-6101
Brawler carbs are patterned and owned by Holley. They will require 7 psi max......get a gauge on there and see where it is.
Jebby
https://www.summitracing.com/parts/sum-230142
After replacing multiple crap small fuel pressure gauges.....I bought this AED piece and it is sturdy with a real glass sight glass......
https://www.summitracing.com/parts/aed-6101
Brawler carbs are patterned and owned by Holley. They will require 7 psi max......get a gauge on there and see where it is.
Jebby
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,391
From: At my Bar drinking and wrenching in Lafayette Colorado
Have you checked? That carb is set up for the sintered bronze in-carb filters in both the primary and secondary bowls, just like a Holley. You better check and verify that there aren't filters in both bowl inlets before you install another filter in the line... If there are no filters in the carb, install them.
...And get your distributor vacuum advance off that "ported" vacuum port and hook it up to manifold vacuum (unless you're trying to pass an emissions test).
Lars
Last edited by lars; Jun 25, 2021 at 03:42 PM.
Thread Starter
Instructor
Joined: Jun 2012
Posts: 170
Likes: 29
From: Somewhere over the rainbow
After replacing multiple crap small fuel pressure gauges.....I bought this AED piece and it is sturdy with a real glass sight glass......
https://www.summitracing.com/parts/aed-6101
Jebby
https://www.summitracing.com/parts/aed-6101
Jebby
That's 1/8" pipe thread, and intended for a pressure gauge - not for return fuel.
Have you checked? That carb is set up for the sintered bronze in-carb filters in both the primary and secondary bowls, just like a Holley. You better check and verify that there aren't filters in both bowl inlets before you install another filter in the line... If there are no filters in the carb, install them.
...And get your distributor vacuum advance off that "ported" vacuum port and hook it up to manifold vacuum (unless you're trying to pass an emissions test).
Lars
Have you checked? That carb is set up for the sintered bronze in-carb filters in both the primary and secondary bowls, just like a Holley. You better check and verify that there aren't filters in both bowl inlets before you install another filter in the line... If there are no filters in the carb, install them.
...And get your distributor vacuum advance off that "ported" vacuum port and hook it up to manifold vacuum (unless you're trying to pass an emissions test).
Lars
I'll do some research on the timed vacuum thing I didnt know that was only for emissions.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
In your photo, you can see the vacuum port that Lars mentioned, "full manifold" under the bowl.
Just remove that cap nipple and move the dizzy hose over to it. Then cap the port at the metering plate.
You will want a 12V lead to that choke tab but make sure the circuit is through the IGN switch "ON" only.
Just remove that cap nipple and move the dizzy hose over to it. Then cap the port at the metering plate.
You will want a 12V lead to that choke tab but make sure the circuit is through the IGN switch "ON" only.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
I have had the AED gauge on there for two years and it is fine…..
I have never purchased anything from AED that wasn’t high quality……
Lars….I completely forgot the sintered filters in the bowls…..good catch.
Jebby
I have never purchased anything from AED that wasn’t high quality……
Lars….I completely forgot the sintered filters in the bowls…..good catch.
Jebby
Thread Starter
Instructor
Joined: Jun 2012
Posts: 170
Likes: 29
From: Somewhere over the rainbow