what are these nipples for ??

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Princess Valiant

A.K.A. Rainy Day Auto
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I am putting my cousin's car together and I was looking at his intake that he has for the car today and I see these nipples on the intake and I cant imagine what they are for......anyone know?
 

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Shame on me! I thought this was on the Blue Forum. Carry on! tmm
 
Is that a water jacket on that manifold?

looks that way...

Winner winner chicken dinner!

Yup. Rani many of the aftermarket manifolds don't "hook up" to the heat (riser) where originally the exhaust manifold bolted up under the intake. Also if you use headers, there's no manifold head.

Run your heater hoses in series with the heater through those, and it will heat up the manifold to prevent carb icing and stumbles when cold.
 
so then, if its a water jacket ....do I have to use it, or can I block it off and not run water through it. I don't like the water idea
 
I would think that you could bypass it without any problem as long as it isn't connected to any other ports or water jackets.
 
Yes. 'A' will result in flow through the intake's base.
Water heated intake should be easier to tune and be more consistant especially in colder weather.
For maximum power, then do everything you can to increase air density and that means cold air and therefore a cold intake is better.
Your choice.
 
I am putting my cousin's car together and I was looking at his intake that he has for the car today and I see these nipples on the intake and I cant imagine what they are for......anyone know?
motor home intake ??????
 
If this is for a daily driver hook them up like A for better driveability if not I would not hook them up.
 
I notice that nearly everybody who says "plug em" lives in warmer climates. You might just find you can get by with this, and you might not. Up here I would not want to plug them. I can still remember (interestingly also) a young woman with a Chev 6 in a pickup with headers, and that damn thing was a bear to drive even in somewhat warm weather.

Rani if you want to learn what this "is," Google up stuff like aircraft carburetor heat, carburetor icing. This is known as the "refrigeration effect." Anytime you run a gas (air, in this case air and evaporated gasoline) from a high pressure, high velocity to a low pressure area, the temperature changes radically. Especially in wet (humid) weather this can be a problem. "Snorkel" carburetor air cleaner heat helps

I'm sure you've used air tools. You'll notice they get cool, not hot. This is because of the air blasting through them and dumping out the exhaust actually DOES drop in temperature.
 
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