Author Topic: Upgrading my fuel line  (Read 9974 times)

Offline SUX2BU99

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Upgrading my fuel line
« on: April 03, 2009, 10:26:39 am »
I bought all the bits and pieces to upgrade my fuel line from the carb to the fuel pump. I decided to go all out and buy AN fittings, braided stainless hose and a hard line kit with fuel filter by Edelbrock to put on at my Edelbrock carb. Cost me $115 but might as well do it right the first time, eh? Those AN fittings aren't cheap! It'll look nice though  :D

Anyway, I was wondering about when threading on the aluminum AN fittings, what I should use on the threads. Guy at the performance shop said to just use engine oil. I also have some thread sealer/lube when I did my brakes. Should I use that? Do I need to use teflon tape at any point? Guy said no. I'll take some pics and put 'em up.

Thanks!
85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline HAULIN IT

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Re: Upgrading my fuel line
« Reply #1 on: April 03, 2009, 03:36:21 pm »
Sux, Nothing is needed on the 37* fittings, the taper seat is the seal, not the threads. A drop or Two of oil on the threads will make them turn a little smoother & helps when you need to take it apart. Make sure you run a 1/2 gal. or so of fuel out before you hook it up to the carb to get any little specs of rubber, ect. out of the lines.  Lorne

Offline choptop

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Re: Upgrading my fuel line
« Reply #2 on: April 03, 2009, 07:31:34 pm »
I put a little oil on the inside peice and the hose to help them go together. The ones I use are steel, but even they like to strip or gauld the threads without lube. I also sue the inside peice to stretch the hose out a little before I put the outside peice on. Use caution. It should start fairly easy, and should just tighten enough to bottom out. They can be broken. If it diesnt start easy, look inside the hose and make sure it isnt folded over internally. This will produce what we call a "rubber check valve" in the hose and causes all kinds of problems if not caught.
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Offline SUX2BU99

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Re: Upgrading my fuel line
« Reply #3 on: April 03, 2009, 08:16:50 pm »
Thanks guys. Sounds like a good plan. I hope the guy chopped the hose to the right length so I don't have to shorten it. If I do, I read that a 32 tooth/inch hacksaw can be used. That's some might fine teeth. I have an 18 tooth in my hacksaw now and the teeth are really small. Any suggestions?
85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline HAULIN IT

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Re: Upgrading my fuel line
« Reply #4 on: April 03, 2009, 08:23:03 pm »
I have had the best time with a wiz-wheel. Wrap the hose with a wrap or Two of tape & cut in the middle. I have heard of guys laying it down on an anvil & "chopping" it with a sharp chisel, but I've never tried it. The hacksaw would leave some loose wires I would think. Lorne

Offline choptop

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Re: Upgrading my fuel line
« Reply #5 on: April 03, 2009, 10:15:19 pm »
I chop it off with a die grinder and a cutoff wheel like Haulinit said, then I round the end off a little on the bench grinder. I dont know if Im using the same stuff you guys use,the hose I use (strato flex) had a cloth outer jacket, steel braided inner , and rubber hose. Its rated for 300 PSI.
76 C10 Choptop,76 C10 Swb
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Offline SUX2BU99

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Re: Upgrading my fuel line
« Reply #6 on: April 04, 2009, 11:59:13 am »
Thanks. I have an air cut-off wheel if need be. Oh, what about the adapter at the fuel pump? I for sure don't need pipe tape on the side that threads into the fuel pump? Are those tapered threads too?
85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline HAULIN IT

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Re: Upgrading my fuel line
« Reply #7 on: April 04, 2009, 12:04:01 pm »
Sux, without seeing the fuel pump...it's only a guess. Most are 1/4" or 3/8" pipe thread, so yes, it's tapered in that case. Lorne

Offline SUX2BU99

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Re: Upgrading my fuel line
« Reply #8 on: April 04, 2009, 04:56:40 pm »
Thanks Lorne. It's a factory-style mech pump and I have a 3/8" to AN-6 adapter for it. I won't put any tape on it then.
85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline SUX2BU99

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Re: Upgrading my fuel line
« Reply #9 on: April 05, 2009, 11:06:48 pm »
I was wrong about that. It's 5/16".

So trying to piece this stuff together was a lesson in frustration and futility. I could NOT get that stupid braided hose into the end of the AN fitting. I phoned the performance parts store and told them that I wasn't getting anywhere but mad and they said "Oh, why didn't you just buy the PRE-MADE kit?" WHAT?? Well now I'm choked since another guy there sold me all these bits and pieces which ends up costing $20 MORE than the pre-made kit and is much harder to deal with IMO. So I'm returning it all and getting the kit. Man.......shoulda known I should have just talked to the guy I usually deal with originally (he told me of the kit) instead of some other guy.  >:(
85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline SUX2BU99

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Re: Upgrading my fuel line
« Reply #10 on: April 07, 2009, 04:43:38 pm »
I exchanged the parts yesterday. MUCH simpler, easier and cheaper. The pre-made hose is made to fit the hard line kit at the carb and everything. The hose kit though came with a 90 degree elbow that fits a 3/8" port, not a 5/16" inv. flare that the stock GM pump has. So I had to buy 1 elbow to replace that. I'll take pics of it all though. The upgrade will still end up costing about $100 but it'll be really nice when done and simple to perform (it better be!)  lol.
85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline SUX2BU99

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Re: Upgrading my fuel line
« Reply #11 on: April 10, 2009, 10:24:48 pm »
Well I got it in and all done. Pretty easy when you don't have to wrestle getting the hose onto the AN fittings. Looks purty too. I'll put up some pics soon.

I also changed my accel pump setting on my carb. It was on the middle hole and I moved it to the top, to increase the stroke on it. I felt I wasn't getting enough of a squirt when I stomped on the throttle. I hope I chose the right hole  lol
85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline SUX2BU99

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Re: Upgrading my fuel line
« Reply #12 on: April 14, 2009, 03:22:02 pm »
So here are the pics if anyone cares to see them. It was an easy upgrade and looks pretty nice I think. I did a write-up and more pics here:

http://www.cardomain.com/ride/3001366/5





85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline Lt.Del

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Re: Upgrading my fuel line
« Reply #13 on: April 14, 2009, 03:23:46 pm »
Looks really nice, good job.

Offline choptop

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Re: Upgrading my fuel line
« Reply #14 on: April 14, 2009, 08:38:49 pm »
It does look really good. Well done.
76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab