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Water cooled intake???


Aussie Zed

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I took my thermostat housing off today and noticed that there is another outlet (other than to the rad) on it, which has been welded up. I looked around and it seems like it should go to my intake manifold (N36), which has no water lines to/from it. There is also another pipe welded off on the other side. This all points to my intake not currently being cooled.

What's going on??? :(

Why would anyone (eg PO) want to do that to my intake? Could the cooling jacket be blocked or something? Is this just a cold running emmissions control thing or does it actually help when engine is warm too?

I've never had any problems running when it gets hot, but it does hesitate when it's cold.

Should i make the effort to re-plumb it?

I'm confused...

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Hi,

Sounds like you're looking at a closed off carb preheater circuit. Most Brirish

sports cars and some American cars from the sixties used this warm

water circuit to prevent carb icing from the venturi effect of pulling possibly humid air into the cold carb body. Some owners block them off. I'm in the

process of putting mine back into use to help cold weather warmup performance.

joel

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  • 9 months later...

What is the best way to block this outlet off, other than welding. I don't think I will have a problem with carb icing here (Very low humidity all year).

There was also a similar outlet from the lower radiator intake. Both of these connected to my FI intake (which I have just removed). Are they necessary?

Cheers

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post-5685-14150796346315_thumb.jpg

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  • 2 months later...

On my '71 the water for the manifold came from the steel bypass y-pipe alongside the engine. I used a long pipe to transfer the water to the heater hose. I removed the pipes from the manifold and plugged the holes. It makes a clean engine compartment.

I wonder if you could put cold water through this manifold to increase hp for autocrossing or at the strip. You could use a small pump and put a small cooler full of ice on the passengers side. I wonder how this would work? NE1 tried this?

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snip...

I wonder if you could put cold water through this manifold to increase hp for autocrossing or at the strip. You could use a small pump and put a small cooler full of ice on the passengers side. I wonder how this would work? NE1 tried this?

Well the theory is right, you would need to richen the mixture as well.

As to how much you would gain, would the expense of the setup make it viable?

FWIW

MOM

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On my '71 the water for the manifold came from the steel bypass y-pipe alongside the engine. I used a long pipe to transfer the water to the heater hose. I removed the pipes from the manifold and plugged the holes. It makes a clean engine compartment.

I wonder if you could put cold water through this manifold to increase hp for autocrossing or at the strip. You could use a small pump and put a small cooler full of ice on the passengers side. I wonder how this would work? NE1 tried this?

LOOK AT THE DATE OF THE THREAD YOU ARE POSTING TO!!!! THIS IS A YEAR OLD

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LOOK AT THE DATE OF THE THREAD YOU ARE POSTING TO!!!! THIS IS A YEAR OLD

Beandip, it seems like you've been doing a fair amount of yelling on the boards lately. Take it easy or you're gonna have to double up on that blood pressure medicine. Life's too short to sweat the small stuff. ;)

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