Custom cut fittings?
01-11-2009, 01:01 AM
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Custom cut fittings? I need a 3/8" NPT to -8AN ORB male/male fitting, but I can only find 3/8" NPT to -8AN 37° flare male/male fittings. Would it be all right to just buy what's available and cut the flare off? Of course, I'd throw an o-ring on there too. What I don't want is to use three fittings (-8AN ORB, a coupler, and an AN to NPT fitting). Thanks.
Here's a picture:
Here's a picture:
Last edited by Somebody09; 01-11-2009 at 11:47 AM.
01-11-2009, 02:11 AM
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Thanks, but that's what I'm already finding.
I'm sure it'll seal just fine with the o-ring, but my concern is flow. If I leave the flare part in tact, will I lose flow?
I'm sure it'll seal just fine with the o-ring, but my concern is flow. If I leave the flare part in tact, will I lose flow?
01-11-2009, 11:58 AM
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Hmmm.... I think have my answer - "yes"!
http://en.wikipedia.org/wiki/O-ring_boss_seal
So do our LSx cars operate "at an extremely high flow rate"? If so, that answers my other question about flow, and what tells me what I need to do about it.
Of course, this information is only as good as its source. I'll let you know if my car goes up in flames! ...if I survive, that is.
http://en.wikipedia.org/wiki/O-ring_boss_seal
Because ORB adapters are relatively rare, one can be fashioned using a 37 degree AN (Army/Navy) flare fitting because the threads are compatible in diameter, pitch and spacing. To do this, a suitable o-ring, washer and nut are obtained separately. The flared end of the male AN flare is machined off. Optionally, a chamfer tool (or, if one cannot be obtained, a drill bit) can then be used to knock the inside shoulder off and make a reverse or inward angle that will smooth the flow of the fluid into the fitting bore. The last step is often unnecessary because most applications don't require a smooth flow of fluid unless operating at an extremely high flow rate.
Of course, this information is only as good as its source. I'll let you know if my car goes up in flames! ...if I survive, that is.
01-11-2009, 12:12 PM
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...and another source: http://www.pressureconnections.com/i...eneral_orb.pdf
I'm finding this source excellent because it even lists torque specs at the bottom! However, looking at the directory in which the PDF resides, I'm pretty sure the specs are for steel fittings.
The O-Ring Boss & the 37 JIC Flare use the same threads. The difference is the way each thread seals. While the JIC seals on the metal-to-metal flare, the ORB seals on an O-ring ... An O-ring seal offers the best leak free connection.
01-11-2009, 12:15 PM
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It'll be installed after the rails, and the regulator (Aeromotive 13301) has 3/8" NPT threads on all five holes (four inlet, one outlet).
