AIT relocation with AEM meth kit and Trueboost

[05stroker]

I am relocating my AIT sensor to run meth. After some pulls this weekend I am seeing 178* AITs. I an running a F1a with a 24 psi pulley and a wastegate with a 16 psi spring for the street. After talking to Lito we decided meth was the way to go. On his recommendations I started looking into the AEM 30-3000. I liked the info I found on it and have it on the way. I also purchased a AIT sensor from a 99' Lighting (DY-1159 9C1Z-12A697-B) and a pig tale (WPT-322 3W2Z-14S411-JZA0 ).

I will be running this setup connected to my AEM Trueboost (30-4350). Lito suggested looking into a way to connect the meth kit to the true boost so it would pull the boost if the meth runs meth kit runs low on fluid or there is an issue with it. I then called AEM tech support today and found that if I connect the green wire (Safe Boost) on the meth kit to the orange wire (Scramble Boost) on the Trueboost and set the desired boost level it will shut the boost down to what ever boost I program the Trueboost for.

Now the question is, where do I mount the new AIT sensor?

There are a few spots on the JPC intake that I am looking at. One is on the drivers side front of the intake and will screw right in, the other is at the drivers side rear and will need to be taped, and the final location is in a port under the rear of the intake.

I have a N2O setup that will be used later for the max pulls at the track that you will see a nozzle on the 90* bend to the TB in the pics to come. I plan to mount the Meth nozzle 90-180* from the N2O nozzle under the tube.

I am open to suggestion as this is my first time to work with this configuration.

I plan to mount the tank and pump in the trunk and make a polished alum. cover for the tank to match the N2O bottle and Batt. box.

Here are some pics I have now and will update as the install happens this weekend.

 

[GB10]

When I ran meth I had my iat in the #2 intake runner about midway. I'd say on the underside of an intake runner, because intake runners have air flowing through them so it probably be most accurate there. Either that or in the middle of the plenum on the bottom since there is a great amount of air flow there too.

Only reason I say bottom is since it would look better and as long as you have the meth injecting correctly there will be no pooling to damage the iat being on the bottom of the plenum.

 

[05stroker]

When I ran meth I had my iat in the #2 intake runner about midway. I'd say on the underside of an intake runner, because intake runners have air flowing through them so it probably be most accurate there. Either that or in the middle of the plenum on the bottom since there is a great amount of air flow there too.

Only reason I say bottom is since it would look better and as long as you have the meth injecting correctly there will be no pooling to damage the iat being on the bottom of the plenum.

I do have the two ports at the rear bottom of the plenum. Do you not feel there would be enough airflow on the drivers side front port? I ask becouse this would be the easiest place to mount it. I dont mind a little work though if the rear bottom is a better place. I dont really want to mount it in a runner if possible.

 

[JeremyH]

Isn't there already a port on the jpc intake designed for an iat sensor? I would just use one of those, technicaly for safety you want in the spot with the least amount of flow or where it should be the hottest reading imho.

 

[05stroker]

Isn't there already a port on the jpc intake designed for an iat sensor? I would just use one of those, technicaly for safety you want in the spot with the least amount of flow or where it should be the hottest reading imho.

There are three 3/8 ports in the JPC intake. Two at the rear bottom and one at the front drivers side that you can see in the above pics.

With that said what is the better location?

 

[05stroker]

This is where I would like to mount it,where the alen plug is, but only if it is the best location.

 

[JeremyH]

I planned on the one at the back of the manifold for mine.

 

[retfr8flyr]

Give the guys at JPC a call and see where they recommend mounting it.


Earl

 

[05stroker]

Give the guys at JPC a call and see where they recommend mounting it.


Earl

I plan on that , but would also like to here from others that have done it since I have a install thread going on this setup.

 

[JeremyH]

IIRC when I orderd my jpc manifold they mentioned the one at the back of manifold when I asked about a good place to put an iat sensor.

 

[05stroker]

IIRC when I orderd my jpc manifold they mentioned the one at the back of manifold when I asked about a good place to put an iat sensor.

There are two there, I wonder what the other was designed for?

 

[JeremyH]

A pcv port/evap I assume since the stock manifold has those 2 ports there or other options etc. I belive it was eric who I talked to about it who mentioned the back port for iat. I planned on using that one up front for a npt/barb to run the vac hose to my bov to make it more responsive.

 

[05stroker]

A pcv port/evap I assume since the stock manifold has those 2 ports there or other options etc. I belive it was eric who I talked to about it who mentioned the back port for iat. I planned on using that one up front for a npt/barb to run the vac hose to my bov to make it more responsive.

The -6an line in my pic is my vac connection to everything. Seems if that area is good enough for all the vac controls on the car it should be good enough for the AITs. It is right after the TB location. You and GB10 have both mentioned the bottom of the intake though, maybe there is something that doesn't stand out to me there?

 

[lito]

You need a spot where air flows by, that is why a runner is usually chosen, if you take one of the rear corners, for example, you will be measuring the heatsoaking inside the manifold instead of the actual air temp (actual is a relative term as the temp metering variation rate is somehow slow).

 

[dysan]

Just throwing a thought out there, but wouldn't you want the sensor forward a bit with an intake like that when using meth? The reason I'm thinking this is because the meth is going to be forced to the back of the intake so the rear runners can possibly see more of the effect when compared to the front won't they? I would want to see the hottest temps rather than the ones that are being cooled the most.

Maybe I'm wrong in my thoughts since I'm by no means an expert with air and fluid dynamics, but with the air being forced towards the back of that intake both from the boost and acceleration, I would have to assume(bad word...I know) that more meth will go to the back cylinders.

 

[05stroker]

When I ran meth I had my iat in the #2 intake runner about midway. I'd say on the underside of an intake runner, because intake runners have air flowing through them so it probably be most accurate there. Either that or in the middle of the plenum on the bottom since there is a great amount of air flow there too.

Only reason I say bottom is since it would look better and as long as you have the meth injecting correctly there will be no pooling to damage the iat being on the bottom of the plenum.

You need a spot where air flows by, that is why a runner is usually chosen, if you take one of the rear corners, for example, you will be measuring the heatsoaking inside the manifold instead of the actual air temp (actual is a relative term as the temp metering variation rate is somehow slow).

Looks like the back of the #2 intake runner halfway down it is then. That area is flat and should tap easy enough.

 

[GB10]

Just throwing a thought out there, but wouldn't you want the sensor forward a bit with an intake like that when using meth? The reason I'm thinking this is because the meth is going to be forced to the back of the intake so the rear runners can possibly see more of the effect when compared to the front won't they? I would want to see the hottest temps rather than the ones that are being cooled the most.

Maybe I'm wrong in my thoughts since I'm by no means an expert with air and fluid dynamics, but with the air being forced towards the back of that intake both from the boost and acceleration, I would have to assume(bad word...I know) that more meth will go to the back cylinders.

Yes, the front runners see the least air flow and the rear see the most. That is why I would run it in the middle of the intake or #1, 2, 5, or 6 runners since those have less airflow and would be the hottest.

 

[908ssp]

I bet it makes no difference where it is mounted. Waiting for results to learn more.

 

[lito]

In a compressed environment one tends to think that things are different when in reality I estimate they are not that different because NA or FI it is still a pressurized system, just that the pressure differential is bigger.

The only thing I am pretty sure is that you should use a spot where the air circulates, if not you did nothing. Getting too close to the TB would not help much as it will be close to the situation where people install the nozzle and then the IAT sensor in the intake pipe, in that config you are practically measuring the meth's temp and you actually wetting it.

There is a lot of things happening inside the plenum that we don't know, some serious CFD would be needed to determine perfect spots so is better to leave that unknown out and use one of the outputs, a runner.

Which one? I still don't know for sure, what everyone's logic indicates that could be better because logic is the only resource we have. My logic and experience indicates that any runner would work well, sensors are slow, there is a lot of reversion so temps at low flows will be high.

What we want with this is putting some distance between nozzle and sensor so we can read more close to final, mixed temps and have a tune that can safely work with this.

 

[one eyed willy]

I put mine in #1, has good flow plus I figured it would get circulation because of the direction of the flow..

Just below that sensor you can see a solenoid I put up front to keep the boost from pressurizing my meth system and it keeps the meth real close to the nozzle for when the trigger gets pulled, other wise your boost will push the meth and air back into your tank

Supercharger tank, coated the inside with fuel tank coating so the meth will not eat the aluminum....

Pump mounted lower than the tank

I'm using a snow kit, biggest nozzle they make that comes on around 15psi.50/50 mix.drops the temps pretty quick about 15-20 degrees....with out it I see around 140-130 usually.