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I have a Vac Manifold I am installing to clean things up a bit .... Whats the best spot to get vacuum from. I see the brake booster line is a common choice, I wanted to run the vac manifold in line but the 2nd end has a cap on it? Anyone know that thread pitch or done that?

 
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sorry i got no input on how to help u but wats a vacumm manifold?

 
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^^^ Its a little manifold you hook one source of vacuum up to and it gives you 6 sources of vacuum so all your vacuum lines are connected to one spot instead of all over.

 
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the thread pattern will depend on the manifold.

 
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not trying to get to off topic her but other than ur BOV and boost gauge, what else needs a vacum line run to it?

 
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^^^^ If you have ems your map sensor needs a vacuum source. thats one more i have many vacuums that i need i just can't remember what else i had.

 
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^wastegate

 
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also looked at my car today and FPR has a vacuum line.

 
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boost gauge, wastegate, bov, fpr, fmu, boost/pressure sensor. lots o stuff needs a vacuum line

 
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just T it into your brake booster line.


woops didnt see this was a month old. sorry. lol

 
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well, while this thread is back from the dead, here's where my thread of my vacuum manifold setup. i dont have pics of where i newly tapped it, but if you look at the last engine bay pic where the brake booster line goes down, i tapped it right at after that [top] bend.

https://www.civicforums.com/forums/7...lem-fixed.html

lol.. my 2 cents

 
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Thread pitch should be a standard 3/8 NPT.

 
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actually if its a golden eagle its not NPT on the ends of it. It requires a special o-ring seal nipple as i recall. I got mine from a company that builds /repairs hoses of ALL sorts shapes and sizes. Was only a coupel dollars. I could take a picture if someone wants it?

 
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here is a picture of it as i recall.

 
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I had a golden eagle, the actual thread pitch is 3/8 NPT. That has nothing to do with the hose size. You can have a 3/8 NPT (large) thread pitched fitting with any sized barb for almost any sized hose, just depends on your needs. The reason it uses o-rings is because the NPT fittings aren't self sealing the same way that AN fittings are.

 
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Either you or myself is REALLY confused. NPT thread is better known as pipe thread...


http://www.plumbingsupply.com/pipethreadsizing.html
AN fitting is a straight thread that usually uses a 37 degree flare to seal its connection. The GE vacuum manifold actually has 6 i think ports that ARE 1/8" NPT along the edge. But the original question refered to the end threads where the cap is.and im about 99% positive without pulling mine apart that it is a standard straight thread that uses a fitting that has a straight thread with a machined surface for the o-ring to seal between the fitting and the manifold

 
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Most of the NPT fittings you come across aren't tapered, AN fittings usually are. I know for my fuel fittings on my fuel rail, the inlet and outlet are both 3/8 NPT and without teflon tape, they leak, they won't seal 100%. As far as the vac manifold goes, I tried searching honda-tech and google and couldn't find anything as far as the size on the ends. But the 6 barb fittings are 1/8 NPT, I know that but they aren't tapered, either.