turbotuner20v

From what I understand, people are adding a second IAT sensor to their intercooler pipe to tune their meth setup. So it goes intercooler > MAF > meth nozzles > 2nd IAT sensor > throttle body.

Is there a certain type of sensor that needs to be used? Can this sensor be tied into an Aeroforce gauge to display IAT's real time w/ a LED trigger if IAT's go above a certain range?

I'd like to add something like this

http://www.aeroforcetech.com/products_sensors_temp.html

But I'm not sure if it can also be used to read IAT's for the meth tune.

bullitt4110

Most just cut the wires and splice in a IAT plug (or get an adapter harness) and add the sensor after the maf, not in addition. Any of those listed should work.

turbotuner20v

ah, that makes sense... I was wondering how the tune factored in both IAT values. So you just cut the IAT wires that lead to the MAF and attach them to the generic aftermarket IAT sensor and it can use that instead.

5 Liter Eater

All you need is a 3rd gen IAT sensor and break out harness. Pretty sure ECS has them.

The Aeroforce will read any IAT you use through the ALDL along with any other PIDs. But I would stick with the GM IAT as any one you put in will need to be recalibrated in the tune and you can find the cal from the 3rd gen IAT's from a 3rd gen tune file.

So you could set the interceptor up to alert you when Boost >~5# AND IAT > ~90. To do this you need to be running a 2 or 3 bar MAP which does not require a speed density tune. I plumb my wide band into the Aeroforce and have it alert me if Boost >3# AND AFR > 12.

5 Liter Eater

As far as tuning the meth, set it up like you mentioned so the IAT sees the temp drop from the meth. Then either leave the high octane spark table where it is now (~15 degrees) and add timing via the IAT spark adder table when IAT is less then a certain amount (I think I start adding at ~80 degrees and only in the upper flow areas); or set the HO spark table to max timing and use the IAT spark adder table to take timing out when IAT's are higher than expected assuming the meth is flowing.

turbotuner20v

Thanks for the input on using the 3rd gen sensor. I purchased the dual Aeroforce gauges already, but was giving the list of sensors to my wife for x-mas and birthday ideas. Looks like I may need to use different sources, or potentially remove them from the list...

If I buy the ECS alky kit, it looks like I would get a GM 2 bar map sensor (same as what aeroforce sells). Could I tap into this for both the alky kit and the Aeroforce gauge?

And while I'm buying the kit from ECS I can confirm the IAT setup is included, or add it to my order. I would just need one of the signal regulators to send 0-5v from the IAT to the gauge I guess.

My plan is to run knock/timing pull and fuel pressure on one gauge, then boost and IAT on the other gauge. I have an AFX wideband already installed for a/f, but no warning light.

If I can get the IAT and map sensor through ECS though, all I need is the fuel pressure sensor.

DSteck

I would use the IAT2 sensor from a CTS-V since you can actually enter the proper sensor calibration into your file.

turbotuner20v

Thanks So do you mean it's an exact replacement for the existing IAT and doesn't require modification to the tune to compensate for different readings?

DSteck

No. The factory MAF has the IAT built in. There's no such thing as a direct replacement IAT in this setup. I mean you can copy the sensor calibration from a CTS-V file and stick it in your's. The LS1 sensors use totally different calibration scales and units that don't correlate exactly with newer PCM labels. I am also a perfectionist, and that's why I use the CTS-V sensor.

07MontRedcp

GM Part number?

BJK

bullitt4110

thats some good info, wasnt aware of that. Thanks.

DSteck

FFFFFFFUUUUUUUUU... hang on, let me find it. It's buried in a million emails.

Edit: Go go gadget GMPartsDirect order history. 12614717

07MontRedcp

Thank you ever so much.

BJK

turbotuner20v

thanks

Is it 3/8 npt threaded?

Also, does anyone know if this is the splitter cable I need if using this cts-v sensor?

http://www.casperselectronics.com/st...oducts_id=1108

or this?

http://www.casperselectronics.com/st...oducts_id=1137

07MontRedcp

BJK

07MontRedcp

I picked up a splitter cable, several years ago, for my AEM Temp sensor kit and it looks just like the one in the first link.

turbotuner20v

I wonder if there is a difference between an '07 Ls2 and an '09 Ls3 harness?

DSteck

Second link is what LS3/LS7 MAF users need.

First link is for LS2 MAF users.

0Cunningham Motorsports

yeah the two pin IAT's dont exactly read correctly due to the iat calibration being different, but they do the job, you will just need to edit the IAT table accordingly... send me a part number of the IAT2 for the cts-v, is that one with the map sensor built in?

07MontRedcp

He put up the part number in post #12.

BJK