DiMora
More Is Better
Nothing super exciting here...but I thought I would share, as I usually do.
This mod is the precursor to Operation Snuffleupagus (where I will attempt to built a "true" cold air intake for my car).
In order to determine the effectiveness of the future mods, I first needed (wanted) to know just how much hot under-hood air my current setup is sucking in through the air filter.
The Aeroforce interceptor, as any of you know, can scan the parameters monitored by the car's OBD-II computer.
The problem is that some of the parameters are bogus calculations - they are a guess.
I had been monitoring "ambient air temp" as well is Inlet Air Temp (IAT). IAT is a valid, accurate parameter, as it comes directly from an IAT sensor in the intake manifold runners. A stock GT with no blower takes IAT from the MAF sensor; when you add a blower, you re-locate the wires that are connected to the MAF to the dedicated IAT.
The problem is that ambient is bogus. Todd @ Aeroforce said this:
Ambient temperature is a PCM calculation based on IAT and other factors. It is not that reliable.
Todd
_________________
Aeroforce Technology
So, this mod is to install a REAL temp sensor into my air inlet tube. I ordered this one from AeroForce:
Next, I removed my carbon fiber intake tube and started drilling on it. I started with a tiny hole, then kept stepping up bits. Once I had a big enough guide hole, I used my air grinder with a conical grinding bit.
I don't know how bad it is to inhale carbon fiber (I know fiberglass is bad)...so I took the necessary precautions as usual. Someday I'll post up a pic so you can see what I really look like, but in the meantime, I'll keep messing with you all, like this:
I ground the hole to ~ 19MM, then installed a PCV valve grommet I sourced from O'Reilly Auto Parts. It is Help! P/N 42316:
Grommet installed:
The upper protrusion is the PCV suction feed to the P/S cam cover. The lower one is the one I just installed.
Next, I put some AstroGlide on the barbed fitting, and slid it into the grommet. Every man's tool box should contain a bottle of AstroGlide...
Here it is installed:
On the right hand side (not yet wired):
Then I ran my wires through the firewall (three total) and started soldering / heat shrinking everything.
I ran them through the same DS grommet where Roush runs the fog-light wires.
The wiring goes like this:
Temp sensor wires:
One to 5V regulator
One to ground
One to Aeroforce Interceptor Analog input
In the interior, you have to install a 5V regulator / conditioner (purchased from Aeroforce):
The three wires on the regulator:
One to 12V switched power
One to Ground
One to temp sensor
Then you program the Aeroforce by telling it that Analog 1 or 2 (I used 1) is "Air Temp".
Done.
So...with the engine off, the temp sensor was perfect. Exactly at ambient!
I started up, and it tracked perfectly.
I drove around to get things good and hot and assess the results (and satisfy my curiosity about intake air temps).
In cruise:
Fully heat soaked at idle at a stop-light (and car not moving...filter sucking in hot underhood air):
It was 70 degrees F out:
The bottom line is my filter is sucking in a bit of hot engine bay air that is varying between 4 and 21 degrees F hotter than the ambient air temp.
Operation Snuffleupages will attempt to address that. I have already started with some under intake chassis mods to facilitate my plan, as well as modifying the underside of my CAI heat shield. More to follow once I get it sorted:
Here is the base of the heat shield:
Modded to get more cool air (as well as chassis metal mods) - that's my cement driveway you see...so it is a direct line of sight to some cool air. I just need to fab some ducting to get the cool air to the filter. I have a plan to be shared later in Operation Snuffleupagus.
Stand by for more.
All buttoned up. Hood paint and stripes coming soon:
This mod is the precursor to Operation Snuffleupagus (where I will attempt to built a "true" cold air intake for my car).
In order to determine the effectiveness of the future mods, I first needed (wanted) to know just how much hot under-hood air my current setup is sucking in through the air filter.
The Aeroforce interceptor, as any of you know, can scan the parameters monitored by the car's OBD-II computer.
The problem is that some of the parameters are bogus calculations - they are a guess.
I had been monitoring "ambient air temp" as well is Inlet Air Temp (IAT). IAT is a valid, accurate parameter, as it comes directly from an IAT sensor in the intake manifold runners. A stock GT with no blower takes IAT from the MAF sensor; when you add a blower, you re-locate the wires that are connected to the MAF to the dedicated IAT.
The problem is that ambient is bogus. Todd @ Aeroforce said this:
Ambient temperature is a PCM calculation based on IAT and other factors. It is not that reliable.
Todd
_________________
Aeroforce Technology
So, this mod is to install a REAL temp sensor into my air inlet tube. I ordered this one from AeroForce:
Next, I removed my carbon fiber intake tube and started drilling on it. I started with a tiny hole, then kept stepping up bits. Once I had a big enough guide hole, I used my air grinder with a conical grinding bit.
I don't know how bad it is to inhale carbon fiber (I know fiberglass is bad)...so I took the necessary precautions as usual. Someday I'll post up a pic so you can see what I really look like, but in the meantime, I'll keep messing with you all, like this:
I ground the hole to ~ 19MM, then installed a PCV valve grommet I sourced from O'Reilly Auto Parts. It is Help! P/N 42316:
Grommet installed:
The upper protrusion is the PCV suction feed to the P/S cam cover. The lower one is the one I just installed.
Next, I put some AstroGlide on the barbed fitting, and slid it into the grommet. Every man's tool box should contain a bottle of AstroGlide...
Here it is installed:
On the right hand side (not yet wired):
Then I ran my wires through the firewall (three total) and started soldering / heat shrinking everything.
I ran them through the same DS grommet where Roush runs the fog-light wires.
The wiring goes like this:
Temp sensor wires:
One to 5V regulator
One to ground
One to Aeroforce Interceptor Analog input
In the interior, you have to install a 5V regulator / conditioner (purchased from Aeroforce):
The three wires on the regulator:
One to 12V switched power
One to Ground
One to temp sensor
Then you program the Aeroforce by telling it that Analog 1 or 2 (I used 1) is "Air Temp".
Done.
So...with the engine off, the temp sensor was perfect. Exactly at ambient!
I started up, and it tracked perfectly.
I drove around to get things good and hot and assess the results (and satisfy my curiosity about intake air temps).
In cruise:
Fully heat soaked at idle at a stop-light (and car not moving...filter sucking in hot underhood air):
It was 70 degrees F out:
The bottom line is my filter is sucking in a bit of hot engine bay air that is varying between 4 and 21 degrees F hotter than the ambient air temp.
Operation Snuffleupages will attempt to address that. I have already started with some under intake chassis mods to facilitate my plan, as well as modifying the underside of my CAI heat shield. More to follow once I get it sorted:
Here is the base of the heat shield:
Modded to get more cool air (as well as chassis metal mods) - that's my cement driveway you see...so it is a direct line of sight to some cool air. I just need to fab some ducting to get the cool air to the filter. I have a plan to be shared later in Operation Snuffleupagus.
Stand by for more.
All buttoned up. Hood paint and stripes coming soon:
