Move IAT sensor to Intake manifold?
 

Why not? I have the DIY autotune Maf eliminator setup, and the radiator fan blows hot air from the radiator right on to the sensor and the metal pipe. Would I get more accurate readings?

I need to move mine...it's just off the TB in front of the a/c fan. Once the fan turns on the pipe and sensor heat soak like a bitch and never seem to drop back down. Paul saw similar readings, moved it just out of his IC down below.

If the IM is already off I'd tap it. ;)

How about a heat shield around the iat?

If you go to the IM, would you tap it for the bung or elimante the bung and just use the IAT?

What?

I'd drill the hole in the intake, tap it, and move the sensor from the MAF eliminator pipe to the back of the intake manifold. hopefully no more heatsoak from radiator.

Why bandaid a problem when you can fix it?

Since I use the NB IM, its a 5 minute job to pull the upper half :)

oh yar! I'd do it, preferably the rear of it.

my IAT sensor sits under the radiator draft:

http://img352.imageshack.us/img352/6044/dsc00514qx6.jpg

I don't get any heatsoak-caused leaning out at all.

Mine heatsoaks pretty well. I don't have time to relocate it yet, I'm just going to make a little heat shield and hope for the best until I have time to.

Megamanual recommends against mounting the open element IAT's directly in the manifold. I may move the IAT from the metal pipe and into the actual filter to see what happens.

http://www.megamanual.com/v22manual/mwire.htm#clt

I'm gonna say do NOT mount it in the intake manifold. On my 99, that intake manifold gets pretty damn hot. Could also cause heatsoak as well. If you were turbo I'd put the sensor just after the intercooler.

Mine is right before the TB, and it heatsoaks like HELL. 150-170*F readings I'm not cruising, then it drops to 130*F.

My old Miata had it in my BEGI Intake Manifold and I had no issues. Current car has it in my Intercooler pipe right before the T-Body. I'm getting a pretty stead reading so far so I am not too worried.

I noticed my intake pipe is very close to the upper rad hose. The pipe there is noticeably hotter than the pipe before it. That has to be warming up the sensor some too. Would it be best to wrap the rad hose or build a heat shield?

mines heat soaking as well, though not as badly as some of yours. I second (or third?) moving it closer to the intercooler as well. I wish they weren't made of fucking brass or copper or whatever and designed in some way so they could not heat soak.

Put it in the IC outlet manifold
http://lh3.ggpht.com/john.malcolm.ro...JPG?imgmax=512
http://lh6.ggpht.com/john.malcolm.ro...JPG?imgmax=576

I have my IAT right next to the TB. The only times I see high temps is when the car sits after it was driven and shut off. The the IAT heat soaks and temps go up to 136*. I adjusted my IAT correction to fix that issue. While driving the temps are down under
94*. If I sit and idle for a while the temps climb to around 101* or so. I don't have a problem with it where it sits.

Why not just face it to the passenger side of the pipe. I did that and its not in the way of the rad at all, sits near where the carbon canister used to.

that's where mine is. heat soaks like a champ. I believe it's more to due with the pipe being Mild Steel and retaining all the heat. I can see 120*F at idle sitting long enough. I'm moving mine tonight, i decide to become unlazy and just do it. I'm tired of seeing my AITs drop when I hit boost.

Hmmmm....

Well mine is moved. Will have results tomorrow, hopefully I can drop the temps below 80* once the fan kicks on...i haven't seemed to be able to do this yet, even after I start cruising again.

wonderfullness!!!!

my typical drive to work hardly will even activate the fans, this morning was no exception. During my drive my intake temps hovered at 70-72°. Ambient was somewhere at 68-69°. Never increased at any light, even the 5 minute one I always start to heatsoak at. My highest temperature at idle was 73°. Once I boost I can actually see the temperatures increase to 80° by redline, as soon as I left off, the temperatures instantly dropped as well back down to 73°.

So I'm happy, no more +90° temps at idle and watch my AITs drop when I hit boost. Now I can actually see what's going on. Should have done this a long time ago, but I'm so lazy.

Attachment 211386

Attachment 211387

Scott did you just simply JB weld the bung to the charge pipe? If it was that easy then I will move mine as well. Especially since there huge reduction in the temps you are seeing.

yep, my last has been JB welded as well for some time now.

Anyone know the thread pitch for that sensor?


3/8" iirc.

Awesome, and thanks for the thread pitch info. I will need to get a new bung since my original one is welded on.

I am assuming that I will need to redo the IAT corrections as well? That isnt a real biggie if I have to change them.

3/8" NPT (tapered) to be precise.

I just went and got a 3/8 bung from a hydraulic shop that is right around the corner from my house. I was referred there since the local speed shop was out of the bungs. I can't tell you how many times I have driven right by there and never realized it was there.

Good info. I installed mine just before the throttle body and it was seeing over 150 degrees at a practice autox. I had to whip out the laptop and adjust the correction for it to hot start. Looks like I'll be moving it out of the engine bay as well.

damn its easy for you turbo guys.

Mine's in the TBI. I plan to built a heat shield because: 1. I like building stuff and 2. I don't know how to patch the hole it would leave behind.

friction tape. coupler and clamp. weld. gum.

mine old bung has a spare AIT sensor in it currently until i do something with it.

My 1st time with JB Weld was, um, interesting....Remember the crap you got about the JB Weld on on the oil pan? Yeah, it looks something like that. BUT! It holds, no leaks, it will be under the car and out of sight, so who cares.

FYI Mine is right before the TB and I too see 150-170*F temps. 130 is the lowest after it's warmed up and I'm cruising. I'm gonna put my sensor in the outlet of my IC like big pimpin' did. Well, I will whenever I get all the couplers I need to make my charge pipes.

I tried building a heat shield for mine. Didn't work. The metal just heats up and warms up the sensor. It does run better though. I'll pick up a bung and relocate it after finals.

I'm thinking that extra bung is a good spot for WI?