nipple size for vac lines (NO VAC BLOCK)

[northerngn]

OK,so i have eliminated that factory vac block and i have a .800 spacer under the upper plenum.
My question is what should i drill and tap for?
I have been told 1/8 in pipe to 1/4 nipple but that looks to big...
just eyeballing a 1/8 in pipe to 3/16 nipple looks almost the same size nipple as the one on the MAP sensor

I know there are many that have gone this route...please tell me what fittings you used

also a quick second question...where did you tap the nipples and how many did you use?
I thought 1 for MAP (xfi car), 1 for FPR,1 for boost gauge, and then 1 split later on down the vac line for cruise/hvac

-Dan Weissmann

 

[DailyDrifter]

The size you need to drill and tap is 1/8th NPT. Just use some of the fittings that you get with a boost gauge, and tap into "manifold vacuum". You might be able to tap into the back of the plenum to keep the clutter down.

 

[northerngn]

yes but what size nipple for the hose to slide onto?
-dan

 

[DailyDrifter]

yes but what size nipple for the hose to slide onto?
-dan

I would have to check. I think its round 4mm in silicon line.

 

[northerngn]

ok was told by a friend to try 5/16

m going to cut a section of vac line and report back since no one on here seems to get what im asking...

nipples like these guys...

Find Brass Hose Barbs and other Pipe Fittings Brass at Aubuchon Hardware

-dan

 

[TurboBuRick]

1/8 barb x 1/8 mpt would work for the smaller lines and a 3/8 barb x 1/4 mpt for the pcv.

You can get them at Ace Hardware too.

HTH

 

[Audie1]

Don't know if this is of any help or not.