-AN Hose inside diameter question

[JCyrbok]

I want to upgrade the stock hoses on my AMsoil single by pass. The hoses are 1/4" inside diameter and I want to upgrade to SS Braid hose to match my fuel and gauge lines, plus add some security to the hoses.



What size AN line should I use to replace the stock ones to maintain the flow rate, etc.



I have some -4 from my fuel press gauge, but it is noticebly smaller ID than the stock stuff from Amsoil, but just slightly like 1/16".



What size should I go with? Whould there be a problem with going up to a -5? Whould this inscrease flow tomuch to the by pass and away fromt he full flow? I think the by pass has a restrictor in it, anyone know?



Thanks in advance,



J-



I tried a search both on the net and here and couldnt find what I needed, thus the question

 

[Turbo1Ton]

I think that hose can vary 1/16" less than the dash size. So some -4 is 1/4" ID and some is 3/16" ID. You just have to check it out.



As far as what size to use, I have no idea what the flow rate is right now butI would probably match as close as possible to what is already there. If it is actual 1/4" ID I think that you could get away with going with either the 3/16" or 5/16" ID stuff and be okay.



I wound up using some some Parker 929BJ Teflon hose for my bypass setup. It was the only stuff that my hydraulic supplier would recommend for the underhood temps and the engine oil. It wasn't cheap stuff but I think the hoses will outlast the truck and probably my lifetime. They are teflon with a stainless braid with a silicone jacket. Nothing should rub through this stuff. I'm happy with it and I guess that is all that matters. Edit: you can get this stuff without the silicon jacket. It would just be 929B and the dash size for the part number.



Jeff

 

[Rman]

When you take your bypass filter off, there is a brass fitting in the middle of it. This fitting has a TINY hole in it, this is what the oil passes through to be filtered. That is the hole that maintains your pressure on the crankcase side of the bypass unit. I don't see a problem using -6 line for this purpose, I think -4 would even supply plenty.

 

[cj hall]

dash size

hello

dash size is 1/16 for every dash

-16 is 1 inch hose but its a nomal size like pipe fittings

1 inch pipe is not 1" inside or out side

 

[banshee]

Like mentioned, the general rule of thumb is 1/16 per dash no. CJ is also right that it's not the ID of the hose. Aeroquip AQP hose is . 204" ID for -4 and . 329" ID for -6. Stick to even dash numbered hoses (-4, -6, -8, etc. ), the odd stuff really isn't used anymore and is hard to get (except -3).

 

[HEMI®Dart]

can't really find the answer...

Do the AN hose end fittings use a JIC 37° sealing surface?



In other words do 3/8" JIC hydraulic hose fittings screw to an Earls, Summit -6AN to 3/8" NPT adapter like in the picture?



It may be a -8 AN adapter for a 3/8" JIC hydraulic hose fitting?

 

[JStieger]

Do the AN hose end fittings use a JIC 37° sealing surface?

I just asked my hydraulic fitting supplier this question 2 weeks ago and the answer is yes, unless you are absolutely dead set on paying more for the fancy colors or if you need more than the standard type NPT to JIC adapters or odd angle fittings.



The only thing he told me to watch out for is the contact between dissimilar metals and possible corrosion issues over the long term, which depends on where you live and the environment in which you drive the truck. As a result I just typically combine steel AN with steel JIC. I have also tried aluminum AN to steel JIC with no problems yet.

 

[Vulcan]

Some of the "push on" type hose can be a bit smaller in ID than the AN size would indicate.

JIC fittings are 37 deg and SAE are 45 deg.