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Mon Jul 18, 2011 4:12 pm

Wanting to know where to hook up a vacuum line to install a vacuum gauge. Do I need to tap into the intake manifold ? If so, do I need to remove the manifold before drilling and tapping to avoid chips in the intake ? Where would the best place to tap and drill be ? Can I splice into the vacuum line on my svda distributor ?

Thanks in advance for your knowledgeable answers.

Mon Jul 18, 2011 4:24 pm

Not enough info. What carburetor set up are you using?

Mon Jul 18, 2011 4:30 pm

Stock 1600 w/ 34pict3 carb (German)

Mon Jul 18, 2011 4:30 pm

What are you trying to see with the vacuum gauge? Manifold vacuum or ported vacuum?

Mon Jul 18, 2011 4:42 pm

I want to install an old Stewart Warner "Motor Minder" economy vacuum gauge. I have never seen one set up before. It tells you what the manifold pressure is. So I guess I now know where to hook it. Just a matter of how is the best way to do that.

Mon Jul 18, 2011 5:04 pm

I have heard of them used as a factory option on older GM cars. You need to hook it up to the intake manifold. The safest way would be to remove the manifold from the engine so as not to get metal chips into the engine. There is also a manifold vacuum tap on the base of the carburetor for the intake preheat thermostat, you could T off of that. The vacuum advance hose is NOT where you want to install it.

Mon Jul 18, 2011 6:05 pm

I just went and looked at my carb again. I see the lower right hand port you mentioned. I have that capped as I am running a 60's oil bath air cleaner in my oval on the 1600. From what I understand you telling me, the port can be used with out any modifications to anything else such as the intake manifold.

Thanks for the help Paul. You saved me a bunch of work.

Tim