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Re: EGI What are these things on the manifold and which ones are needed?
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With the water temp sensor etc I see in this pic http://datsun1200.com/modules/myalbum/photo.php?lid=21837 that there's a water hose in from the front of the head.. Just wondering where the water exits or it doesn't?

Posted on: 2016/1/21 14:28
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Re: EGI What are these things on the manifold and which ones are needed?
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It's just like the GX manifold

Water goes in the manifold via the hose and exits through the small holes in the head.

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A14/A15 wet port cylinder head
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Posted on: 2016/1/21 21:04
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Re: EGI What are these things on the manifold and which ones are needed?
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Ah so that's what the holes are for in the front! Any advantages to running a wet vs dry head?

Posted on: 2016/1/21 21:17
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Re: EGI What are these things on the manifold and which ones are needed?
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The question is not about wet vs dry head, it's about running a hotspot vs no hotspot. HP drops at low airflow, and runs less smoothly, if the engine has no hotspot as sikyne recently found

There are two common methods:
* Dry manifold with Heat Riser
* Water-heated inlet manifold
The choice of which to use is determined by the inlet manifold -- it either bolts to the exhaust manifold, or if has provision for water ducting

Some racers run without hotspot. Works OK as they normally only run full-throttle

Posted on: 2016/1/21 22:13
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Re: EGI What are these things on the manifold and which ones are needed?
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so your advice would be to run the water to create a hot spot?

Posted on: 2016/1/21 22:19
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Re: EGI What are these things on the manifold and which ones are needed?
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It depends:

* If you are going to be racing the engine, no street driving, tap & plug the holes in the cylinder head, the remove the hose fitting from the manifold and plug the hole

* For a street engine, yes I recommend connecting the hose. 1 hose, two hose clamps. Done.

Posted on: 2016/1/21 23:06
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Re: EGI What are these things on the manifold and which ones are needed?
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Thanks again David..

Posted on: 2016/1/21 23:52
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