[elky] Re: AN Hose
- From: Chris Lindh <chrislindh@xxxxxxxxx>
- To: elky@xxxxxxxxxxxxx
- Date: Tue, 9 Mar 2010 17:32:08 -0500
I'm thinking about simplifying my fuel line... if I take the G3727 filter
out of the equation I don't need nearly as many fittings, currently- 5/8-18
inverted flare to 6AN to 16MM-1.5
I found a fuel filter for an '83 Camaro with Cross Fire (Delco GF 478 , Fram
G3694) features a barb inlet and a 5/8-18 inverted flare outlet: (great
resource for swap info)
http://www.aces.edu/~parmega/efi/fittings.txt<http://www.aces.edu/%7Eparmega/efi/fittings.txt>
I could mount one of these back at the beginning of the line (above the
rearend) and that would cut out 2 fittings at the back of the line, and then
I could run the -6 hose straight from the hard line to the fuel rail,
cutting out the G3727 filter and the adapters I have to use for it.
The big question is will a filter for a Cross Fire TBI hold 50 psi?
On Mon, Mar 8, 2010 at 10:55 PM, Chris Lindh <chrislindh@xxxxxxxxx> wrote:
> I watched a video of a line being made and they made the same suggestions
> about a straight cut and lubricate the fitting... he also said once it cross
> threads it is stuck, so you hand tighten at first.
>
> I'm not sure I like the idea of aluminum fittings, steel and brass have
> been reliable. I can also get nylon braided hose - basically the same specs
> but with a nylon braid instead of stainless steel. Whenever I consider long
> runs of rubber or push lock hose I wonder if a tech at a drag strip would
> bounce me for that. The closest drag strip is 85 miles away... I've only
> been twice in all these years, but it would be a pain to drive all that way
> and not get to race.
>
> I'm not sure about the filter either.
>
> On Mon, Mar 8, 2010 at 9:17 PM, Robert Adams <elcam84@xxxxxxxxx> wrote:
>
>> Have made but I used aircraft stuff which is allot nicer stuff than the
>> car stuff. Despite what some advertising says there is a difference. It is a
>> pain to assemble. Make sure your hoses are cut perfect and then use the lube
>> when screwing the fittings into the hose and same with the collars. The
>> steel and stainless ones are great but the aluminum ones are real finicky
>> and gall easily.
>>
>> To be honest on my TPI I used one section of AN hose and it
>> lasted a couple years before it started to get wet then spew fuel. I
>> replaced that spot with steel line (didn't need flex it's just allot of
>> bends). For flexible hose I used plain old high quality FI hose and it has
>> been perfect. Not a single problem. I also used aircraft/equipment style
>> hose clamps in pairs. They have a stainless sleeve with strain reliefed
>> edges and the outer band with the screw is a stainless strap. I have never
>> had one of those leak anything. The will hold up to 100s and low thousands
>> of PSI so 50lbs of fuel is easy especially using two.
>>
>>
>> Another couple issues with the braided AN hose is that it's very
>> abrasive. It has to be adel clamped and no rubbing of any sort allowed or it
>> will eat through anything it touches. It's also a pain to bend and get into
>> place like you want. I personally have had little luck with using AN hose
>> for gas lines as it seems to eat the rubber over time however it works great
>> with oils of any sort.
>>
>>
>> Robert Adams
>>
>> On Mon, Mar 8, 2010 at 6:17 PM, Chris Lindh <chrislindh@xxxxxxxxx> wrote:
>>
>>> Have any of you made AN braided hoses? I've never been interested in AN
>>> hose because of the expense, but now that I am in the performance parts
>>> business I have access to "private label" AN fittings and hose that is
>>> considerably less expensive. (I also have customers buying fittings & lines
>>> as a complement to carburetors I have in inventory.)
>>>
>>> When I plumbed the EFI on the '80 I used:
>>>
>>> 3/8" hard line for the feed line joined with connectors
>>> Pre-crimped Aeroquip hydraulic line for the soft connection to the filter
>>> and from the filter to the fuel rail
>>> Stock old feed line for the return line
>>> Aeroquip blue push lock hose from the fuel rail to the return fuel line
>>> GM OE EFI filter, Fram G3727
>>>
>>> It appears the pre-crimped hydraulic hoses I used are leaking some fuel.
>>> They are also stiff and heavy. You can see one of the lines (not connected)
>>> in this photo: http://chrislindh.googlepages.com/010306003mid.jpg
>>>
>>> I'm also wondering if I should try a different filter, the fittings I
>>> used to adapt the filter to AN have a small orifice... Then again I have 6
>>> or 7 new ones left...
>>>
>>> Thoughts?
>>>
>>> --
>>> Chris
>>>
>>
>>
>
>
Other related posts:
