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View Full Version : MP Plenum Vacuum Fittings?



Dahoopd
03-16-2009, 07:05 PM
Does anyone know what size and thread they are? I bought a used plenum and it doesn't have any fittings. I tried a few auto stores and they don't have the right size. Thanks for the help.

superbirdx
03-17-2009, 07:44 PM
You have a PM.

RedSC93
03-17-2009, 08:21 PM
ohh so so secret

decipha
03-17-2009, 08:25 PM
you probably may want to get a plug as well... i remember that i had to plug one of the fittings i believe it was in the front of the plenum behind the supercharger next to the bypass... you'll see what i mean.

Dahoopd
03-17-2009, 09:40 PM
you probably may want to get a plug as well... i remember that i had to plug one of the fittings i believe it was in the front of the plenum behind the supercharger next to the bypass... you'll see what i mean.


The plug is in there. I thought I had to remove that to connect the bypass.? Where else would you connect the bypass?

decipha
03-17-2009, 09:45 PM
i suppose you could... i just connected the bypass to the stock bypass line coming from the tee on the driver side that way i didn't have to cap it or anything.

superbirdx
03-20-2009, 09:19 PM
You have a PM.

.............................................

superbirdx
03-20-2009, 09:21 PM
ohh so so secret

No secret just long story;)

JeepsterSC
04-10-2011, 09:58 PM
I need to hook the SC bypass actuator line up to the front of the plenum. Does anyone know the size of the thread on the front of the MP plenum were the brass plug is?

90coug
04-11-2011, 12:00 PM
I need to hook the SC bypass actuator line up to the front of the plenum. Does anyone know the size of the thread on the front of the MP plenum were the brass plug is?

I have one that I can take a picture of for you. Or, you could call Charles over at Magnum Powers. I'm sure he'll sell you guys a few.

David Neibert
04-11-2011, 12:08 PM
I need to hook the SC bypass actuator line up to the front of the plenum. Does anyone know the size of the thread on the front of the MP plenum were the brass plug is?

Pretty sure it's 1/8" NPT

David

JeepsterSC
04-11-2011, 01:58 PM
I'll see if I can shoot an email over to MP and get a definite answer so that we'll have it in the archives for future reference

JeepsterSC
04-11-2011, 06:23 PM
From the man himself:

"The front hose barb hole is 1/8" NPT and the rear ones are 1/4" NPT. Because of the way they measure pipe thread they look a lot bigger then the name implies."

Funny, I wasn't aware that there was such a thing as 1/8 NPT. Learn something new everyday

Kurt K
04-11-2011, 06:52 PM
Funny, I wasn't aware that there was such a thing as 1/8 NPT. Learn something new everydayNot that it applies here, but there is also 1/16" NPT; which happens to be the thread size for the schrader valve on the fuel rail.

92sclikenew
04-11-2011, 06:58 PM
it took my plenum to the hardware store and found what i needed..

JeepsterSC
04-11-2011, 07:15 PM
Not that it applies here, but there is also 1/16" NPT; which happens to be the thread size for the schrader valve on the fuel rail.

That's good to know. The Schrader valve is the same size as tire valve stems is it not?

scskydivin
04-12-2011, 12:56 AM
it took my plenum to the hardware store and found what i needed..

"Ace Hardware, now offering performance parts & accesories for your car!" :)

David Neibert
04-12-2011, 08:34 AM
That's good to know. The Schrader valve is the same size as tire valve stems is it not?

The outside of the stem that contains the schrader valve will accept 1/16" NPT fitting, not the inside.

David

Kurt K
04-12-2011, 09:16 AM
The outside of the stem that contains the schrader valve will accept 1/16" NPT fitting, not the inside.

DavidYeah, I should have explained it better. The thread size on the fuel rail is 1/16" NPT. I don't know the actual thread size for the schrader valve, but I'm sure it is NOT NPT.