Intake Holes

[Brett James-McCall]

Apologies for the dumb question, but I have lost the manual and need some guidance. What are the three ports highlighted (feintly) for on the RPM Air-Gap manifold

 

[Brett James-McCall]

Hmm that didn't work well... I'll have to take a picture tonight....

 

[Simon Rider]

Brett,
i believe top left is for the heater fitting, bottom left is temp sender and on the right is the vacuum port.

 

[Randy V]

Brett,
i believe top left is for the heater fitting, bottom left is temp sender and on the right is the vacuum port.

Correct!

 

[Brett James-McCall]

Simon, Randy, Anyone
What is the usual size of the heater fitting, as I thought it was that... but it is massive on my manifold i.e. my old 5/8 heater hose fitting is too small!

Brett

 

[Randy V]

Brett I believe that they are drilled and taped for 1/2" NPT. You can get brass reducers at your local home improvement store in the hardware section.

 

[Malcolm]

Brett, I have this manifold on my engine. If you want for a picture, ask away. One thing to note that it is a tall manifold compared to some I have had. With my holley on top I do not run an air filter (potential for problems I know) as the filter hits my rear screen. If you are running Roys lowered engine mounts you should not have this problem.

As to fittings I use top left for a air bleed off point. Bottom left is where my temp sender plugs in and I have blanked off the rear one (at least I think I have!) as my vacuum comes from the base of the carb.

Hope this helps.