Oversized 3/8ths preformed fuel line - Page 2 - JeepForum.com
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post #16 of 34 Old 07-23-2021, 11:01 AM
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Ty guys line bending isn't on my resume but I can get some help.
It's not that hard, it doesn't have to be precise, and Nicop is very forgiving.

Give it a go before throwing in the towel.

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post #17 of 34 Old 07-24-2021, 04:37 PM Thread Starter
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Since sniper efi was brought up. Anybody running an electric fan off the snipwire er harness ? If so which wire from the 10 wire connector did you use ? And where does it in the connector? Pics ?

Update nevermind. Its the light blue or light green wire on the 10 wire connector. A ground signal

1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
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post #18 of 34 Old 07-27-2021, 02:25 PM Thread Starter
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Okay . I read all the posts on this thread. What prompted me to bring this up is the fuel pump is relatively loud . You may even wonder if its going bad. Its mounted on the frame rail with cushion clamps with foam. I called holley . They said some people wrap them in computer mouse pads and then secure it. I dont know the noise is my only complaint so far as far as the fuel pump goes

1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
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post #19 of 34 Old 07-28-2021, 01:23 PM Thread Starter
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First off To the OP sorry if this has jacked the thred!!!! What FI set up were you going to go with?


SOOO how is the 5/16 line working on the BBD?
WHile like others have said I do like working on the jeep, but the less I have to change the better. Did you run the 3/8 return line that came in the kit? I'm thinking of using the NOVAK in tank pump for the CJ w/20 Gallon tank. (my sending unit sticks at a quarter, then randomly drops to empty, so thats just a bonus for me if the in tank pump fixes it).[/QUOTE]

I have the sniper bbd kit with all the hyperspark stuff. I do use the return line. I have a 20 gallon tank and my sending unit is currently working so I didnt want to screw that up. As far as how the 5/16ths fuel line is working I cant say because I dobt know why my fuel pump is as loud as it seems

1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
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post #20 of 34 Old 07-28-2021, 08:13 PM
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Quote:
Originally Posted by agear View Post

I have the sniper bbd kit with all the hyperspark stuff. I do use the return line. I have a 20 gallon tank and my sending unit is currently working so I didnt want to screw that up. As far as how the 5/16ths fuel line is working I cant say because I dobt know why my fuel pump is as loud as it seems
I think the general consensus is the external fuel pump is loud. I know mine was annoying enough that I changed to an in-tank pump. I initially thought I could get used to it, but after getting an in-tank pump for the bbd I knew I had to get one for the 4150 as well.


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post #21 of 34 Old 07-28-2021, 09:39 PM
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If you don’t care about keeping it looking original, you might look at running SS braided fuel hose. I went that way and will not go back to hard lines.
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post #22 of 34 Old 07-29-2021, 12:20 AM Thread Starter
agear
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Originally Posted by KevinCJ7Jeep View Post
If you don’t care about keeping it looking original, you might look at running SS braided fuel hose. I went that way and will not go back to hard lines.
That crossed my mind thanks Kevin. Is it jusy fuel injection hose with a stainless steel sleeve over it ?

1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
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post #23 of 34 Old 07-29-2021, 06:31 AM
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Yes, basically. I got it from a local speed shop. Not sure of the brand, there are many. One thing to note is you will have to cut the hose to length and install fittings. I use Earl’s -AN fittings.
If you decide to go that route I can give some tips on cutting the hose and installing the fittings. There are many videos on YouTube.
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post #24 of 34 Old 07-29-2021, 06:57 AM
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I'm wonderng if anyone knows of a place to get jeep cj7 258 preformed hard fuel line 3/8ths diameter
Some thoughts.

A 3/8 tube is twice as big at a 1/4 tube (cross-sectional area.)

Your fuel will take twice as long to flow along a 3/8 pipe.

If it's flowing at half speed, it will get a lot warmer if it's near a heat source - exhaust pipe.
Hot fuel means less power from your engine.

How you gonna connect a 3/8 pipe to connections that expect a smaller pipe?
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post #25 of 34 Old 07-29-2021, 01:32 PM Thread Starter
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Quote:
Originally Posted by agear View Post
I'm wonderng if anyone knows of a place to get jeep cj7 258 preformed hard fuel line 3/8ths diameter
Some thoughts.

A 3/8 tube is twice as big at a 1/4 tube (cross-sectional area.)

Your fuel will take twice as long to flow along a 3/8 pipe.

If it's flowing at half speed, it will get a lot warmer if it's near a heat source - exhaust pipe.
Hot fuel means less power from your engine.

How you gonna connect a 3/8 pipe to connections that expect a smaller pipe?
Well the sniper bbd efi kit came with 3/8tha hose. The factory uses 5/16ths line. The bbd cjs have 5/16ths line . Why would holley suggest 3/8ths ? I don't know

1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
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post #26 of 34 Old 07-29-2021, 05:28 PM
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A 3/8 tube is twice as big at a 1/4 tube (cross-sectional area.)

Your fuel will take twice as long to flow along a 3/8 pipe.
That relationship isn't linear under pressure, especially when the pressure of any EFI system is at least 2x that of the stock fuel system.
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post #27 of 34 Old 07-30-2021, 10:50 AM
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Originally Posted by agear View Post
Well the sniper bbd efi kit came with 3/8tha hose. The factory uses 5/16ths line. The bbd cjs have 5/16ths line . Why would holley suggest 3/8ths ? I don't know
Holley know more about the what their carb needs than me Agear.
I daresay they say to use 3/9 because their car uses fuel more rapidly when you are clogging it than the original carb used.
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post #28 of 34 Old 07-30-2021, 01:29 PM
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It's not a carburetor, it's fuel injection.
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post #29 of 34 Old 07-30-2021, 02:31 PM
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So I just got the NOVAK in tank pump, and go figure it has 5/16 lines on it (granted it is a stock sending unit. I've got everything except the Holley Sniper (aaaaaannnnnnd it's back ordered till end of august....or longer). I've got all the -6 AN fittings, and just went ahead and bought them in 5/16, so I'll try setting it up with the 5/16, and if it gives me crap I'll get the 3/8 line and use that.

I do need to call NOVAK cause the pump has a black foam sheath on it.... I would think its supposed to go in the tank like that, but I'm gonna verify first.
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post #30 of 34 Old 07-30-2021, 02:34 PM
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it was some $$ but it’s everything I need and shipping was like 2 days.
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Was 84JeepJohn but was gone for a while.
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