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Sat Aug 18, 2007 3:46 pm

Alright, I am running a CNC master cylinder with the economy empi disc brakes on all 4 wheels. I also have a cutting brake, brake bias valve, and park lok that need to be plumbed. I am going to run 3/16" steel brake line, with 4 pieces of flexible braided steel on each wheel. I have read up as much as possible on all these types of fittings, but I am still confused. I want all my threads to match so I don't have any leaks. All the parts I have so far seem to be 3/8" female thread, so I was planning on getting 3/8" male fittings for the flared steel. Does anyone know what the actual thread is on the CNC master cylinder, and when should I use AN threads, or NPT threads, or just 3/8" or 3/16" thread. I am confused.

Sat Aug 18, 2007 3:47 pm

And from what I can tell I am supposed to use a 45º double flaring tool, and not the 37º single flare too, right?

Sat Aug 18, 2007 5:49 pm

definitely double flare!!!!. if your master cylinder outlet has the seat for inverted flare,you are all set.if nor,the outlet is probably1/8 or 1/4 npt.no sealer of any kind on double flare fitting,btw.A good parts store can help you with any adapter fittings you might need.if you have a tough time getting help,contact me and i will give you the part #'s you need.

Sat Aug 18, 2007 7:47 pm

thanks. Here is a picture of the back of the master cylinder. I measured the fitting and the opening is 3/8". I know the fitting is made for 3/16" "standard brake line" as CNC says. But what is the correct fitting for this hole. -6 AN, 3/8" NPT, or just 3/8"-24?

Sat Aug 18, 2007 8:48 pm

Ive got those fittings, but did not use them as I did all mine lines in -AN fittings and I can tell you the adapters that CNC gives you are not any kind of -AN size, Its going to be a 45 degree but dont know what thread size.

If your going to use those adapters that came with the MC then you will not be able to use any -AN fittings if you want all the connections to be the same, otherwise you will need a 45 degree flaring tool for the bubble and sae flares and a 37 degree flaring tool, sleeves and caps for the -AN fittings, again, dont know exactly what size those brass adapters are but hope this helped some.
If I had to guess I would say they are 3/16th female with a 45 degree flare. ?

Sat Aug 18, 2007 11:37 pm

Nicksan, would it be easier just to go AN all around? ie get an adapter for the cylinder and all 4 wheels and then just get a double flare tool and all the necessary AN fittings? It sounds like a pain in the ass to figure out what threads are what, and what fittings are needed.

Sun Aug 19, 2007 4:01 am

IKf it was me,I would stick with the invered flare throughout.I used 3/16inverted flare tubing purchased in stock lengths at the parts store.the only adapter fittings you will need are Edelman #271300,that convert 10mm bubble flare to 3/16 inverted flare.that way,any auto parts storewould have lines on hand if ya bust a line out in the puckerbrush.

Sun Aug 19, 2007 8:43 am

For me it was easier because all the brake cylinders, MC and, clutch were all the same 1/8th female pipe thread for the adapters, It depends on what thread is on your calipers. I think using all AN fittings is much easier, especially when you use the premade AN flex lines, but it costs alot more and you will have to buy a 37 degree flaring tool.

I got my stuff from these places.

http://www.anplumbing.com/shop/

http://www.inlinetube.com/

Mon Aug 20, 2007 6:29 pm

I will be at Pomona swap meet. If you need the 3/16 SS fitting { Hard Line} to pipe your car I have a bunch. I will also show you how to use you 45 degree flaring tool to flare the 37 AN degrees. I will sell the fitting cheap.

You PM me what you need first.

Thanks Terry

Mon Aug 20, 2007 8:01 pm

The fittings that come with cnc master cylinders are 1/8 th npt to 10mm metric bubble brake line.Here is a link to what they look like.http://www.appletreeauto.com/detail.aspx?ID=12482 If they were 3/16 brake line they would not have the little notches around the hex.

Mon Aug 20, 2007 9:23 pm

Yeah, I called CNC today, and they said it was setup to use bubble flare. I don't understand why it is called 1/8" NPT when the whole is 3/8". Oh well. Since I amg going to run all my own lines instead of use stock lines, should I just get an adaptor to fit 1/8" NPT to 3/16" 45º double flare? Probably the easiest way, eh?

Tue Aug 21, 2007 7:42 pm

Terry Cloyd wrote: I will be at Pomona swap meet. If you need the 3/16 SS fitting { Hard Line} to pipe your car I have a bunch. I will also show you how to use you 45 degree flaring tool to flare the 37 AN degrees. I will sell the fitting cheap.

You PM me what you need first.

Thanks Terry

Sorry I can't make

Wed Aug 22, 2007 6:52 pm

[quote="mybugsucks"]Yeah, I called CNC today, and they said it was setup to use bubble flare. I don't understand why it is called 1/8" NPT when the whole is 3/8". Oh well. Since I amg going to run all my own lines instead of use stock lines, should I just get an adaptor to fit 1/8" NPT to 3/16" 45º double flare? Probably the easiest way, eh?[/quote]

The female threaded part of the MC is what is 1/8th pipe thread. You can buy any adapter that is 1/8th male pipe thread to whatever size and type you want to use, AN, metric, or American SAE. From there just use all the same type fittings.

Wed Aug 22, 2007 9:51 pm

That's the answer I was looking for. Thanks Nicksan.

Thu Aug 23, 2007 8:11 pm

I am doing my setup right now. Prowler speed and custom on Santa Clarita Ca. has been a godsend. The can get the adapters to make it all work. (661)288-5757