Intake vacuum fitting Needed !!!

[87BlazeLS]

Hey all, I have my Edelbrock Performer RPM intake manifold off for some service work ( 350 SBC )
I have a single hose barb fitting that screws in just behind the carb base gasket. The problem is that this
fitting only has one rather small port for a single hose. I need a larger tee or adapter but not completely sure
what to get. got any suggestions ?
It is a dual plane manifold (not the air gap) Edelbrock performer RPM The engine is a 79 Camaro.
Not that it matters. I do not see any part numbers on this item at all.

If I measure the opening with the fitting removed what should I read for a given size thread ?
Like whether it's 1/2NPT or 3/8NPT and so on ? I think it's 1/2 inch but not sure.

jake

 

[jmt455]

Most "decent" auto parts stores have a big selection of vacuum fittings.
It's probably a 1/8NPT thread, but the easiest thing to do is take the fitting to a local parts store and match up to what you need/want.
There are several styles and different threads, so you should be able to find one that fits your needs.

 

[565bbchevy]

If you referring to the port on the runner behind the rear of the carb it is a 3/8" NPT and they make low profile 90* fittings for this with a 3/8" hose not sure exactly what you are looking for. The only 1/2" NPT fittings are for the heater hoses at the front of the intake.

 

[larryo454]

ones like this??? http://www.allcarevws.com.au/products/s ... k-valves:6