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Old 01-28-2012, 07:21 PM   #15
BullF-16
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Quote:
Originally Posted by Unreal View Post
You want the IAT sensor to read the temp drop from the meth so you ECU can adjust timing for the meth. It won't hurt the sensor. The sensor is just a ceramic tipped thermister that just changes resistance based on temp. You can submerge it in liquid all day long without hurting it.

You said "thermister"
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Old 01-28-2012, 07:26 PM   #16
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Originally Posted by MANNYS2SS/RS View Post
Bull after you relocated your IAT sensor what is the difference in IAT when the Meth is not on? Is it about same or higher

Manny, I have noticed the IATs are now closer to the actual ambient. Before the iat was about 5 or 6 deg above ambient while up to speed. Now it is only a deg or two above ambient when cruising.

One thing that is wierd is at first start up in the morning the iat reads well below ambient...I.E. the car says its 50 deg outside and the IAT says its 37deg. it does this for about 6 or 7 min then it gradually climbs to the actual ambient temps or just a bit above
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Old 01-28-2012, 07:30 PM   #17
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This is tuning for safety and not for HP gains due to the meth addition. that way, when or if the meth fails the temps climb and the ECU pulls timing based on the increase in IATs.....at least this is how i had mine tuned. Dallas Performance and Taylor are "idiot savants" where meth and stock bottom end LS3s and 10+ psi boost are concerned. He has a slew of vettes running big boost and living a long time.


Quote:
Originally Posted by Unreal View Post
You want the IAT sensor to read the temp drop from the meth so you ECU can adjust timing for the meth. It won't hurt the sensor. The sensor is just a ceramic tipped thermister that just changes resistance based on temp. You can submerge it in liquid all day long without hurting it.
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Old 01-28-2012, 08:47 PM   #18
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Thanks Bull and unreal for all your help and information.
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Old 01-29-2012, 08:46 AM   #19
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You should be able to get the GM screw IAT at any autoparts store or dealer. You may need to adjust the IAT calibration tables in your ECU if it is different then your current setup. I had to adjust them in my z06.
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Old 01-29-2012, 08:02 PM   #20
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UNREAL THANKS, for your help.
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Old 03-07-2013, 12:47 AM   #21
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I recalled this thread and I thought not to write another thread about it. Planning to do the same mod with my existing D1 unite as MAnnys2ss/rs and Bullf-16 but with two nozzle alky system and vector motorsport IAT allocation kit.

Guys my doubts are:
1) I've been told that it is not recommended to spray meth before the sensor as it will damage it..Is that true?
2) I'm planning to do it this way so the ECU will read any sudden changes and adjust accordingly. For example if my alky system stops for any reason, the ECU will adjust to the raising inlet Temp automatically..
3) Out of curiosity, the last time I’ve checked when doing a pass that my timing dropped to 11-12 and it gets worst with every other pass. How far will I be able to go with meth and what are the expected HP gains.

Sorry MAnnys2ss/rs not trying to highjack your thread.. But it would be a great reference to Centri owners as it was for me before ordering my parts
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Old 03-07-2013, 01:44 PM   #22
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My IAT sensor was relocated to my intake manifold behind the TB. So it goes: Maf/meth/tb/IAT sensor. In this picture, the meth isn't on yet.
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Old 03-07-2013, 07:50 PM   #23
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OP. I used the Cadillac CTS-V IAT sensor. It has the brass thread you wrote about. I just welded a bung in the charge pipe and threaded it for the sensor. It will not come out under any amount of boost.
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Old 03-07-2013, 08:15 PM   #24
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I have 2 sensors setup in my car and I have one before the intercooler and one after the intercooler so you can monitor both sides and really see how efficient it is running
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Old 03-08-2013, 08:05 AM   #25
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I have since relocated it to the intake tube, with no more problems. Thanks for everyone input.
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Old 07-08-2013, 03:23 PM   #26
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Bringing this back from the dead. So is relocating the iat sensor on a centri with meth necessary? The iat and maf are one unit correct. So what kind of aftermarket or oem iat from another gm car is needed and do those sensors read exactly like the oem sensor? I have heard about tuners tuning for meth that if it fails and iats go up the computer pulls timing. The way i see it this could only be possible with the iat sensor relocated because you dont want to spray meth through the maf right?
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Old 07-08-2013, 04:28 PM   #27
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Buy a harness from casperselectronics that separates the iat wires from the maf. I have a centri with the iat in the intake after the tb. You need the iat after the maf and meth. You dont want to spray meth on your maf. You could place the iat in the piping after the maf and meth but I chose the intake. If the iat is not after the meth the temp drop wont register to the ecu. Maf then meth then iat.
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Old 07-08-2013, 05:06 PM   #28
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Quote:
Originally Posted by bct10985 View Post
Bringing this back from the dead. So is relocating the iat sensor on a centri with meth necessary? The iat and maf are one unit correct. So what kind of aftermarket or oem iat from another gm car is needed and do those sensors read exactly like the oem sensor? I have heard about tuners tuning for meth that if it fails and iats go up the computer pulls timing. The way i see it this could only be possible with the iat sensor relocated because you dont want to spray meth through the maf right?

Before doing iat relocation i was seeing 60 c in a 20 c amb temp while driving at 120 km.. Even my tuner expressed his worries about it.. Now i'm seeing iat around amb temperature.. So it is doing the job..

Look up one of my threads to see which wires to re-route from the harness.. As far as the sensor i will try to look up the part number and i will pm it to you..
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