TheSamba.com :: View topic

Mon Apr 21, 2014 10:33 am

I'm building a 1915 for a baja and will be going full flow. I already know how the system should be layed out, but I can find good info on the hardware to use. I don't much care for barbed fittings, so I would like to use AN fittings.

Questions.
1 Do I have to use a steel braided line? I would rather not as I will see lots of mud.
2. What type and ID of line should I use?
3. What tool is used to crimp AN fittings?
4. Where is the best / cheapest source to get fittings at?

Any other input is appreciated.

Mon Apr 21, 2014 11:44 am

You should use 1/2" hose that's oil safe. You don't need steel braid, you can get the blue flex hose with push on fittings.

Mon Apr 21, 2014 11:52 am

As Glenn suggested, or have some hoses made by a hydraulic shop with crimped on ends. I have used hydraulic lines and sometimes found the ends to be a bit less cumbersome in tight quarters than equivalent AN fittings.

Mon Apr 21, 2014 1:32 pm

Use push lock hose with push lock hose fittings. Get the Blue Park 836-8 hose (oil rated), it has a 300deg F. temp rating. The Push lock system is good for 250psi. Use the Parker 30682-8-8 str hose fitting, or 33982-8-8 90deg. hose fittings.

Mon Apr 21, 2014 4:23 pm

Dont be afriad to use stainless hose , it is not affected by mud . They seem to last forever and are very easy to make at home .Summit racing is my favorite source. There is nothing wrong with the blue rubber hose and brass barbed fitting , just make sure not to use hose clamps on them .

Mon Apr 21, 2014 4:47 pm

AN-8 would be half inch, it is an acceptable size for most full flow applications If you want AN-10 (5/8 inch) is slightly less restrictive, which is helpful if you have a really long run to your filter/cooler (I got a front mounted cooler) AN-8 can be cheaper and allows tighter fitting.

Note.... Not all manufacturers of AN fittings make dimensionally the same fittings even if their description is the same. Thus if someone tells you to use an AN-8 90 degree elbow to fit someplace, or what ever, be sure to ask them to specify what brand of AN part they say fits.

Manufacturer A's 90 degree elbow might be longer or larger radius than manufacturer B's 90 degree elbow.

Summit Racing has a good selection, look them up on line, easy to use search.

Manufacturers that I have used have good website catalogs, check them out.

Russel, Fragola are two brands I have used. there are many more. If you have a local speed shop, Hot rod shop look their, the hot rod crowd does a lot of AN stuff, in fact that is how AN got into the automotive world thru the hot rod guys putting surplus AN (Army Navy) fittings on there cars post WWII. Many speed shops will have advice and maybe a large selection in stock. My local shop let me take several fittings home to see what fit, then allowed me to return the ones I didn't need, this was very handy

some times you can resort to a brass flare fitting, so long as you know that the a flare fitting angle is not the same as AN angles. they are close, and can seal if torqued enough. this is sometimes used at the VW engine case where there is a need for a tight, non-restrictive 90 degree bend. you can hook an AN to it.

stainless braid is nice, however it can cut thru any metal body, exhaust or engine case if not held away to prevent rubbing, it cuts like a file they have destroyed motors so don't allow a metal braided hose to rub anything.

you will want to keep the oil hoses as far as possible from the exhaust.

I prefer the AN fittings that cut into the hose as you turn the nuts on the fitting.

many fitting suppliers sell hoses too.

Besure to get the metal with rubber padding cable clamps to secure the hoses so they don't flop around. I like them better than the nylon cable clamps.

Wed Apr 23, 2014 8:46 am

On the return line to the case, will that be 3/8" npt or 1/2" npt?

I'm debating using AN8 (1/2") because the port at my pump and both ports at my filter are 3/8". AN6 is 3/8" ID so if I use that, the entire system will be the same. Other wise I will have a 1/2" system with a few 3/8 ports.

Won't thise cause more restrictions that a full AN6 3/8" system?

Wed Apr 23, 2014 11:14 am

sloboatnova wrote: On the return line to the case, will that be 3/8" npt or 1/2" npt?

I'm debating using AN8 (1/2") because the port at my pump and both ports at my filter are 3/8". AN6 is 3/8" ID so if I use that, the entire system will be the same. Other wise I will have a 1/2" system with a few 3/8 ports.

Won't thise cause more restrictions that a full AN6 3/8" system?

3/8 NPT is closely equivalent to -8 AN. -6 AN is equivalent to 1/4 NPT.

-8 AN is specified for a 1/2" outside diameter hard line, the inner diameter is less than that depending on wall thickness. NPT size roughly corresponds to the inner diameter of a Schedule 40 pipe, but it's the outer diameter that's actually in the spec, it's kind of messed up. A 1/2" pipe size is 0.84" OD with the inner diameter varying depending on wall thickness.

Wed Apr 23, 2014 12:35 pm

Are you sure? Summit shows AN8 hose having an ID of 1/2".

I've spent about an hour on Summit's website. I think I'm going with AN8 even though the filter adapter, oil pump, and case return will be 3/8"npt.

$150 is going to be the damage. At least shipping is free. lol

http://www.summitracing.com/parts/sum-220786-b/overview/

Wed Apr 23, 2014 2:11 pm

sloboatnova wrote: Are you sure? Summit shows AN8 hose having an ID of 1/2"./

Yes, -8 AN hose is 1/2" ID (normally just a bit undersized). This is to match with the actual AN spec of a 1/2" OD tube so the hose is not a restriction and to make it easy to match sizes. The ID of a -8 AN fitting will be less than 1/2".

Wed Apr 23, 2014 4:23 pm

I just made my oil lines with summit -8AN fittings. I would also recommend grabbing the aluminium vice inserts for holding the fittings. They went together pretty easy.

Thu Apr 24, 2014 5:29 am

Pallen, thanks for the good report. I didn't even know there was a special fixture to help assembly. Looks good. I'm gonna pull the trigger on this one very soon.