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1G Intake manifold - drilling ports

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AWD-Tony

Proven Member
6,801
3,735
Sep 11, 2017
Cincinnati, Ohio
I want to drill and tap for 2 separate ports. One for boost gauge which is currently T’d to fpr, and one for SD map sensor. Any objections to these two spots? Think I’ll use the far left for boost gauge.

Thanks
Tony

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Kevin Jewer made a post on the link forums stating he's had issue with that bottom right spot, or any spot, that is directly opposite a runner. Apparently it causes noise in the reading. This is in reference to your first post.
 
Kevin Jewer made a post on the link forums stating he's had issue with that bottom right spot, or any spot, that is directly opposite a runner.

I haven’t seen that post. I will look it up. Thanks man!!
 
Kevin Jewer made a post on the link forums stating he's had issue with that bottom right spot, or any spot, that is directly opposite a runner. Apparently it causes noise in the reading. This is in reference to your first post.

What’s his screen name?
 
Kevin Jewer made a post on the link forums stating he's had issue with that bottom right spot, or any spot, that is directly opposite a runner. Apparently it causes noise in the reading. This is in reference to your first post.

Oh on ecmlink forum???
 
I wouldn't tap anything in a curved area like that, if thats your idea, that area is thin also, the one to the left is fine, the other one I would put up on the plenum somewhere.
 
I wouldn't tap anything in a curved area like that, if thats your idea, that area is thin also, the one to the left is fine, the other one I would put up on the plenum somewhere.

Going to see if bottom of plenum is accessible. Thanks Matt!
 
yep that's how I did mine I had to clean the shavings out when I drilled it and I used a bit of sealant forgot what I used no problems.
 
yep that's how I did mine I had to clean the shavings out when I drilled it and I used a bit of sealant forgot what I used no problems.

I tilted the mani so all the shavings stay in the plenum and used a shop vac while drilling to keep clean up a breeze. Very little got in the runner by they weren’t an issue to remove. Thanks iugrad!
 
These are the taps on my Evo2 and JMF Drag manifolds.
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These are the taps on my Evo2 and JMF Drag manifolds.
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Dang that manifold is sweet. One day...one day!
 
This was unneeded. There are fewports with plugs in them already on the 1g manifold. The hole sizes are 1/8 bstp. A much better and more permanent solution. It still baffles me when people try to run and trust tapping thing walked tubing and castings.
 
This was unneeded. There are fewports with plugs in them already on the 1g manifold. The hole sizes are 1/8 bstp. A much better and more permanent solution. It still baffles me when people try to run and trust tapping thing walked tubing and castings.

If you say so
 
This was unneeded. There are fewports with plugs in them already on the 1g manifold. The hole sizes are 1/8 bstp. A much better and more permanent solution. It still baffles me when people try to run and trust tapping thing walked tubing and

There is no room on the drivers side and the passengers side will be under the throttle body. Please explain what’s wrong with tapping the manifold?

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Both of those ports are easily accessible. Because you did not choose to be creative is not my issue. We have used those ports on numerous cars with numerous setups.

The casting is not thick enough to get a quality amount of threads tapped into it. Not much different than someone trying to do the same thing with a thin walled intercooler pipe.

It doesn’t matter what I think anyway. It is your car and your choice to do as you please. If it fails then you were warned. I have been doing this for 20 years. I am not talking out of my ass for the hell of it.
 
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