I'm converting to MAP/Speed Density, and I'm trying to figure out where to wire the AIT to. I've been all over the factory schematics, and I cant find it. I could run new wires to the EMS, but I believe there are factory wires to splice into to make my life easier. If you've converted to Speed Density already please let me know what you did to wire the AIT. Thanks guys! Oh, and AEM's forum should be back up by mid next week so they tell me

 

I believe you splice into the maf sensor harness. Also did you put the sensor in the i/c piping yet? Where did you put it? I dont have the EMS installed yet, hopefully in the next 2 to 3 weeks when i get the ait and map sensors. Anyway, i was told to put the sensor in the lower pipe coming out of the i/c. This way the sensor dosent get heat soaked, like it would if it were in the engine bay. Maybe this will help.

 

why don't you try searching? there is an entire topic named "converting the car to speed density"

bryan

 

if you take the MAF plug looking at it with the connector tab on top I believe it is the 2nd and 3rd wire from the right side that you use for connection for AIT.

 

bump for a answer on this i'm doing the same & would like to know for sure..

 

Here's the wires that need to be spliced into. Polarity doesn't matter.

 

thanks man.. i can just wire into the wires right by the maf connector right??

 

yes

 

It's best to keep the AIT as close to the MAP sensor as you can. I have mine installed right by the throttle body on the intercooler piping. I did this for another reason also, water injection. My WI is fed in about midway up on my IC piping. So the AIT will read this cooler air and I can adjust the fuel and timing accordingly. Thanks for all the responses guys and happy tuning!

 

I actually removed my AIT sensor up by the throttle body due to heat soak at idle and moved it to the elbow right after the i/c on the cold side. I also will be using the AMS alky kit running 100% meth so I am not sure how long a ait sensor will be able to take it. I will install an extra ait sensor after the methanol just for monitoring purposes to see how much difference there is between the 2 and to see if it will last.

 

Slightly off topic. Is there an advantage of using the stainless map sensor over the brass one? Thanks

 

When I switched to the stainless map sensor I noticed more noise, it seemed to pick up indivual pressure pulses from the valves opening and closing. Even with the map filter set to 4 I would see 2psi peaks and valleys. With a restrictor in the line or if you put the sensor into a dampening chamber this could probably be eliminated though.

 

Interesting. Maybe I will install a AIT down by the IC on the cold side as well to compare temps between the two.

 

I just want to see if there will be the same difference between the 2. For instance say the lower sensor(before meth) is reading 70 degrees F and drops to 50 degrees after the Meth. Then for instance 90 degrees F on the lower sensor(before Meth) would the after Meth reading be 70 degrees F? In theory yes, my point is that putting the sensor before or after meth shouldn't change how you tune the IAT Fuel compensation graph at all, but if you are injecting 100% meth I would think you want the IAT sensor before it to extend the life of the sensor. Just my random to bits.

 

Chad, I completely understand what you are saying. However, I wont be injecting straight meth. As you said, I'm also curious to see the difference in temperatures before and after WI. Regardless of water/alky/meth injection you're going to shorten the life span of every sensor across the board when using those particular setups. It's par for the course.