-AN Fuel System

[Dr Ronald]

So I found out that my fuel sending unit hard line is kinked, so I'm converting it to -an fittings (technically JIC fittings). I know how to do the sending unit, but how do you attach the SS hose to the hard line under the car? I think the thread on the hard line is NPT. Are there -an to NPT adapters? Also, my fiance works for a certain well known fitting manufacturer and can get me some free fittings. However, she can't get me all the fittings I need. Do you think I would be ok threading two different brands of fittings together? I know I shouldn't, but I really like the whole idea of free. Is there any sealant ( I know I can't use teflon) that I can use to prevent leaks. Maybe rubber or RTV or something.

A side question: The rubber seal around my fuel sending unit isn't doing it's job. I really hate using RTV, but I don't want to buy a new seal. Can I put some RTV on the seal to help stop the leak or do I need to buy a new one?

 

[99gst_racer]

I know how to do the sending unit, but how do you attach the SS hose to the hard line under the car?

You don't. The SS braided hose replaces the entire hardline from the pump to the filter.

Are there -an to NPT adapters?

Yup. Aside from hose ends, adapters are the most common AN fittings there are.

Also, my fiance works for a certain well known fitting manufacturer and can get me some free fittings.

Eaton Aeroquip?

Do you think I would be ok threading two different brands of fittings together?

Sure, no issues at all. I do it all the time.

Is there any sealant ( I know I can't use teflon) that I can use to prevent leaks. Maybe rubber or RTV or something.

Teflon tape is recommended. But only on NPT threads. AN threads seal with the flare, and other straight threads seal with an o-ring or crush washer.

 

[CrawlinZX14]

Well any fittings should work as long as they are flaired the same. Make sure if you are using an fittings which are 37* I believe that your other fittings match. Non an fittings use 45* flairs on their ends. Next there are tons of an to npt adapters out there. Also u can cut the line put a collar and nut on and flair it for an an fitting. It honestly sounds like you should do some research on an fittings in automotive plumbing a bit before tackling this especially in a fuel system and high pressure fittings.

As for the seal, just replace it. Don't cut corners in your fuel system. Also when u state fuel sending unit I'm assuming u mean your fuel pump hard line right?

Sent from my T-Mobile G2 using Tapatalk

 

[TSITurbo95]

Listen to what Paul said, dead on!

 

[TJCTalon]

Does anyone know what adapter to use on the hardlines? Whats the thread pitch?

 

[agentorange313]

http://www.dsmtuners.com/forums/bolt-tech/411679-1g-fwd-fuel-upgrades.html#post152694134

Those are the thread pitches that match the hard lines at the fuel pump hanger and where the fuel line meets the filter. Remember they are flared lines.

 

[T is for TURBO]

You can interchange JIC (SAE 37) with AN. Only difference is that AN is 40% stronger, and a higher thread class. So yes, you can mixmatch brands.

I never understood why car people opt for AN fittings. They are sooooooooooooooooo expensive compared to JIC fittings (I am guilty, since my kits all came with AN fittings). And no one will ever need the added strength/percision of AN fittings, with MAYBE the exeption of top fuel.

When I redo my fuel lines, I plan to go to JIC only. There is a Parker/Hannifin store about 3 miles aways, so I should be able to get what ever size I need.

 

[greekgodchaos]

Couldnt you use a Push Lock hose to go over the OEM hard fuel line? Like cut the line right before the kink, flare it, then use the Push Lock tubing over it with a clamp or something? I was considering doing something similar to this for the retun line from my AFPR so it would be like 1', but I would just flare the tube and push the Push Lock hose over it.

 

[Dr Ronald]

Eaton Aeroquip?

No she works for Parker. She is an engineer there. I've heard that fuel will eat through teflon tape. So I really don't want to have to do the entire system in SS. How much do you need to replace the entire hard line? How do you hang the SS? Any answer for the sender seal?

BTW Thanks for the responses.

 

[3kgt2nv]

Get yellow teflon tape it is specifically for oil and fuel.

 

[99gst_racer]

How much do you need to replace the entire hard line?

10 feet would get you from the tank to the filter. However, if you think you may be interested in replacing the other hoses under the hood, then you may want to pick up 20 feet and have a bit left over.

How do you hang the SS?

I use these: Allstar Performance - racing and high performance car parts, accessories and specialty tools.

PICS:

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Any answer for the sender seal?

I'd recommend a replacement OEM seal, as apposed to rigging it with any type of sealant.

 

[Dr Ronald]

Thanks a lot. One more quick question. I'm going to be using name brand fittings, but will I be ok with Ebay SS hose?

 

[Bud92gsx]

SS braided hose is SS braided hose isn't it?

 

[T is for TURBO]

SS braided hose is SS braided hose isn't it?

When dealing with automotive braided hose, usually... But I wouldn't assume that, especially when dealing with e-bay.

I would go with either Earls, or Russel products. They are a bit more pricey, but it is quality. And one more thing, I personally will never go back to braided stainless steel lines. I will go with the Russel brand nylon braided lines. I hate, HATE dealing with braided stainless.

 

[Bud92gsx]

Nylon braided lines you say..What's the difference between nylon braided and ss braided..Besides the obvious answer..

 

[99gst_racer]

Thanks a lot. One more quick question. I'm going to be using name brand fittings, but will I be ok with Ebay SS hose?

As long as the hose is intended to be used with AN fittings, then brand shouldn't matter. I sell 8 different brands of fittings and hose, and they all interchange with each other. Without being familiar with whichever hose you're looking at, I can't garuntee it will work, but the odds are on your side.

Nylon braided lines you say..What's the difference between nylon braided and ss braided..Besides the obvious answer..

Nylon hose (like Earls Pro-Lite 350) is much easier to cut and assemble, and it also has a tighter allowable bend radius. It's also lighter for the guys that are weight conscious.

 

[Bud92gsx]

Much easier to cut and assemble..Meaning no taping the ends of the braided ss line so they don't fray and potentially come apart?

 

[99gst_racer]

You still have the tape the ends. The process is all the same as SS braided hose. Though, nylon frays will be easier to fit into the hose end, and they won't stab your finger tips either. It's also MUCH easier to cut.

 

[Bud92gsx]

Well now that makes sense..

Now whats the cost lets say per foot..Nylon vs SS line.And do they use the same AN fittings.Cause I was thinking about going tank to rail myself..

 

[3kgt2nv]

different fittings i believe. but look at summit fittings work the same and about 1/3 of the price of the name brand stuff

 

[99gst_racer]

Well now that makes sense..

Now whats the cost lets say per foot..Nylon vs SS line.And do they use the same AN fittings.Cause I was thinking about going tank to rail myself..

It really depends on the brand. I know Earls' nylon hose is about $1.90/ft more expensive than their SS braided. Russell's Pro Classic (nylon braided) is only $1/ft more expensive than Aeroquip's SS braided. (all examples are -6)

I still prefer SS braided when runing underneath the car, but I'll probably be using mostly nylon braided hose under the hood for fuel lines and coolant hoses.

And yes, they do use the same fittings.

 

[Bud92gsx]

So it's a little more pricey per foot for the nylon..I figured that much..

 

[T is for TURBO]

Basically what Paul said. The only thing he didn't mention was that braided SS can be very rough on anything with a nice finish. And since it is more difficult to route than regular hose, there a good change you are going to rub it against something and scratch the paint off. I also like the "stealthy" look of a nylon hose, but that's just opinion.

And as Paul said, no stabbed fingers with nylon. And if your mildy retarded like myself, you WILL stab your fingers. Multiple times. And those little fckers hurt.

 

[Bud92gsx]

I've never cut SS lines..But I know the procedure..

And I know the feeling of the pricked fingers..I have done alot of rewiring..

I have a braided ss line from machv for my oil feed line..It's too long and has to be routed weird..So I might have to change it for a shorter nylon peice..And plus like you said SS lines can rub the finish off of nice stuff..

 

[T is for TURBO]

I have braided line for my oil cooler, and it hate it. I'm going to rip it out and replace it with nylon this winter. I feel that the bend radii are to tight for braided ss. Especially with my lack of ground clearance. It could be fixed with different fittings, but fittings are pricey.

Dr Ronald, what fitting from parker do you plan to go with? This style?


Edit: Grabbed the wrong link