Tap size for bypass valve connection?

[NothinButNotch]

Can anybody tell me the tap size I will need to put in the bung connector into my inlet tube for a Bosch bypass valve? I dont have the valve yet but I am headed to the store today to get a tap for the oil pan and figure I will go ahead and buy the one for the intake if I know what size to get. Thanks for any info, Ryan

[92 coupe]

Can anybody tell me the tap size I will need to put in the bung connector into my inlet tube for a Bosch bypass valve? I dont have the valve yet but I am headed to the store today to get a tap for the oil pan and figure I will go ahead and buy the one for the intake if I know what size to get. Thanks for any info, Ryan

Its either 1" or 3/4 - I cant remember. I had an aluminum tube welded on mine. I tried the plastic Bosch bypass and come to find out it didnt work at all. Would never open. It was brand new, so I went with a Turbo XS H34 bypass instead. Very nice piece and this one works great. After the first bad plastic one, I am a bit weary to try another - allthough lots of people swear by them and have no trouble at all. Probably just my bad luck.

[NothinButNotch]

Thanks 92 coupe.

[slow91]

its a 3/4 npt tap.

[NothinButNotch]

Does bypass valve come with the piece that goes into the inlet tube once its tapped or is that another adapter I buy? Its a little white plastic piece isnt it with threads on one end and ribbed on the other?

[slow91]

No it doesn't come with the bypass. you need a 90deg elbow to thread in to the discharge pipe. you can get them at the hardware store plumbing section.

[PNY PWR]

I used 2 straight 3/4mipX1"barbed adapters. Mine didn't need an elbow.

Remember the threads are 3/4" but the hose is 1". I used 1" heater hose from the auto parts store. Only needed 1'.