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-   -   AIT sensor install question? (https://www.miataturbo.net/megasquirt-18/ait-sensor-install-question-7600/)

greenday3437 06-13-2007 08:41 PM

I guess i'll just tap the intake manifold, i kinda need it by this weekend and it would take too long to get it shipped here and stuff.. oh well, how thick is the wall on the intake manifold? who all has done it? how do you clean out all the shavings it makes

y8s 06-13-2007 09:21 PM

mcmaster holmes!!! they're not 9 bucks I dont think. it's 3/8npt

Ben 06-13-2007 09:50 PM

get an Al bung and TIG it on to your IC pipe.

I wouldn't tap the intake mani, if the mani is on the motor. And it's a lot of work to remove it from the motor. Easiest thing is to pull the charge pipe at the t-body, drill, weld, and go...

Braineack 06-13-2007 10:03 PM

.99$ bung from ACE Hardware....get a 1/2" Compression fitting sleeve.

the threading is 3/8" and the hole for the "line" is the perfect size for the sensors element to fit through.

http://images.orgill.com/200x200/1182914.JPG

greenday3437 06-13-2007 10:50 PM

Ok ill do that thanks


Originally Posted by Braineack (Post 122788)
.99$ bung from ACE Hardware....get a 1/2" Compression fitting sleeve.

the threading is 3/8" and the hole for the "line" is the perfect size for the sensors element to fit through.

http://images.orgill.com/200x200/1182914.JPG


greenday3437 06-13-2007 11:07 PM

Ok i have a question.. I'm trying to order some taps online because earlier i went to lowes and other stores and they didnt have any that i need..

Whats the difference between a NPT tap and a NC tap.. the reason i ask is i found a 3/8" NC tap at lowes but it was tiny compared to the 9/16" drill bit im supposed to use, so i'm guessing they use a different way to measure it?

cjernigan 06-13-2007 11:14 PM

Autoparts stores carry NPT taps individually pretty commonly.
The NC tap is not close to a NPT tap. The NPT taps are larger than what you sould assume they are and they are tapered for a compression fit when tightening.

Ben 06-13-2007 11:16 PM

Harbor Freight had a tap kit on clearance in their last ad. Go there, if there's one close.

greenday3437 06-13-2007 11:17 PM

ok thanks a lot

greenday3437 06-13-2007 11:26 PM

This is still annoying.. i cant tell what tap set is NPT and what is other kinds.. I found a 3 peice with 2 of the 3 sizes i need.. I guess ill try auto parts store or something

y8s 06-13-2007 11:27 PM

nc = national coarse thread
npt = national pipe thread

pipe thread is based on pipe size which doesn't really correspond to the outside diameter of the pipe...

and it's tapered.

Braineack 06-14-2007 09:06 AM


Originally Posted by greenday3437 (Post 122806)
Whats the difference between a NPT tap and a NC tap.. the reason i ask is i found a 3/8" NC tap at lowes but it was tiny compared to the 9/16" drill bit im supposed to use, so i'm guessing they use a different way to measure it?

when you find the right one, it will most likely just say 3/8" or 3/8-16 or something, NC is not NPT.

magnamx-5 06-14-2007 10:43 AM

Uhh dude you do know that there is no way to weld aluminum to steel, that i know off. :nuts:

y8s 06-14-2007 10:56 AM

intake pipe... you could braize it.

greenday3437 06-14-2007 10:34 PM


Originally Posted by Braineack (Post 122883)
when you find the right one, it will most likely just say 3/8" or 3/8-16 or something, NC is not NPT.

ok thanks

Chamuko 06-18-2007 05:04 PM

I would do the intake pipe due to known heat soak issues with intake manifolds.

richard_ha 06-18-2007 05:19 PM

1 Attachment(s)
Here's how and where I've fitted mine
Attachment 216330

FoundSoul 06-18-2007 09:22 PM


Originally Posted by richard_ha (Post 123928)
Here's how and where I've fitted mine
http://i100.photobucket.com/albums/m.../IACFitted.jpg

That's the perfect position... just before the throttle body...

richyvrlimited 06-19-2007 02:40 AM


Originally Posted by FoundSoul (Post 123984)
That's the perfect position... just before the throttle body...

Umm assuming you not supercharged surely Jerry ;)

akaryrye 06-19-2007 03:04 AM

For my intallation with a picture in page 1 of this thread, I removed the manifold and would not consider doing it any other way. For me it was pretty much an easy task, but it takes some time ... maybe a few hours. I painted it black at the same time.


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