Razor,
I have been pondering the location of the IAT sensor for some time now, And wonder what your take on it is.
You mention in other threads how the inlet temperatures are lowered using alcohol. I understand this to be because methanol converts to a gas at 150degrees F and takes heat energy to do so, therefore lowering the amount of heat in the surrounding air.
OK so where to place the IAT sensor?
For EMS tuning you want to place the IAT as close to the intake valves as possible so the computer knows the temperature of the incoming air and can calculate density. So for us that means doghouse.
However, do you think the IAT sensor reading can be compromised and and result in a false reading if the cold methanol spraying from the nozzles lands on the sensor that is down stream?
If the air entering the motor is less than 150degF, then the methanol is still in a finely misted liquid form right? Is is not until it lands on the surface of the surrounding surfaces before it totally becomes a saturated vapor.
I have my IAT placed in the up pipe before the IAT, but this is not good because A: the distance from the intake valves is not ideal and the air could change temperatures before entering the motor, B: the cooling affect of the methanol is not measure by the IAT which could result in the computer thinking the air is less dense that it actually is = lean. However the methanol is providing fuel, so I just tune 10.8:1 A/F.
Do you see what I am getting at?
OH sorry if this has already been answered.
I have been pondering the location of the IAT sensor for some time now, And wonder what your take on it is.
You mention in other threads how the inlet temperatures are lowered using alcohol. I understand this to be because methanol converts to a gas at 150degrees F and takes heat energy to do so, therefore lowering the amount of heat in the surrounding air.
OK so where to place the IAT sensor?
For EMS tuning you want to place the IAT as close to the intake valves as possible so the computer knows the temperature of the incoming air and can calculate density. So for us that means doghouse.
However, do you think the IAT sensor reading can be compromised and and result in a false reading if the cold methanol spraying from the nozzles lands on the sensor that is down stream?
If the air entering the motor is less than 150degF, then the methanol is still in a finely misted liquid form right? Is is not until it lands on the surface of the surrounding surfaces before it totally becomes a saturated vapor.
I have my IAT placed in the up pipe before the IAT, but this is not good because A: the distance from the intake valves is not ideal and the air could change temperatures before entering the motor, B: the cooling affect of the methanol is not measure by the IAT which could result in the computer thinking the air is less dense that it actually is = lean. However the methanol is providing fuel, so I just tune 10.8:1 A/F.
Do you see what I am getting at?
OH sorry if this has already been answered.