Anyone know the thread size for the thread in ports to the left and right of the thermostat on an Olds Performer or RPM intake?

[olds307 and 403]

Planning on getting a couple of 180 turn on fan switches and a 70 amp relay. Is it 3/8" NPT?

 

[Stupidquestionspro]

Well my outside port was 1/2 and I believe the inner is 3/8 at least on the drivers side on a 7111


Sent from my iPhone using Tapatalk

 

[pontiacgp]

they would be 3/8" NPT, the heater hose connections are on the water pump so there isn't a need for an 1/2" NPT port on the manifold

 

[olds307 and 403]

Remember these are aftermarket. Pretty sure they are 1/2", at least some of them. I think the hot air choke off the 260 will also go on the 350 since the Performer has it in the manifold.

 

[pontiacgp]

It doesn't matter if they are 3/8" or 1/2" NPT, if they are 1/2" you just need the adapter bring it down to 3/8"

 

[olds307 and 403]

It doesn't matter if they are 3/8" or 1/2" NPT, if they are 1/2" you just need the adapter bring it down to 3/8"
https://www.amazon.ca/gp/product/B07NC8NRKX/?tag=rippca-20

 

[pontiacgp]

those come in 3/8" as well, if you have the intake why not just measure them and if you don't contact Edelbrock

 

[olds307 and 403]

Intake isn't here right now. I do have a RPM on the 350 right now.

 

[olds307 and 403]

Here is the answer, two 1/2", one 3/8". both BBO and SBO Edelbrock intakes are the same, except the SBO has one 3/8" like Stupidquestionspro said. Mine is a 3711 but will be the same. I may install 2 then it is just a matter of unplugging and moving the connections over on the side of the road if a thermal sensor fails.