Cold weather VS. intake question
10/18/06, 12:25 PM
#1
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Cold weather VS. intake question
Do you guys leave your intake on all winter long?
Once it gets around freezing does the air become to cold or thin?
Would this lean the mix ratio out?
Theese all may be dumb questions but It's better to find out.
Thanks, Mike C
Once it gets around freezing does the air become to cold or thin?
Would this lean the mix ratio out?
Theese all may be dumb questions but It's better to find out.
Thanks, Mike C
10/18/06, 05:27 PM
#5
Team Mustang Source
There is a temperature and air pressure sensor in the intake somewhere, it tells the computer how to adjust fuel/air/spark according to temp and barometric pressure. No matter how cold the air coming into the engine, it will adjust properly as long as the computer tune is working right.
10/19/06, 06:48 AM
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KC
10/19/06, 10:03 AM
#9
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Most modern fuel injected cars (like the S197s) will have an IAT (intake air temperature sensor). Last I checked, the latest Ford MAFs have an IAT inside the MAF (6-wire harness versus the older 4-wire harness) for better precision since the thermistor is now right next to the MAF sensing wires.
When it gets TOO COLD, the IAT's signal will tell the PCM to advance ignition timing by a few degrees. When it gets TOO HOT, the IAT's signal will tell the PCM to retard the timing by a few degrees.
Cold air is denser so it allows for a higher oxygen content, but the funny part is that most CAI kits, even the FRPP/Steeda, will increase the intake air temperature in low speed conditions. They won't reduce the air intake temperature below ambient at highway/high speed conditions.
What I would have like to see on the 05-up GT is an OEM-quality airbox upgrade:
Steeda style inlet elbow with a 90mm MAF and a large airbox designed for performance but to also allow the use of a paper filter for better filtration.
When it gets TOO COLD, the IAT's signal will tell the PCM to advance ignition timing by a few degrees. When it gets TOO HOT, the IAT's signal will tell the PCM to retard the timing by a few degrees.
Cold air is denser so it allows for a higher oxygen content, but the funny part is that most CAI kits, even the FRPP/Steeda, will increase the intake air temperature in low speed conditions. They won't reduce the air intake temperature below ambient at highway/high speed conditions.
What I would have like to see on the 05-up GT is an OEM-quality airbox upgrade:
Steeda style inlet elbow with a 90mm MAF and a large airbox designed for performance but to also allow the use of a paper filter for better filtration.
10/19/06, 12:03 PM
#10
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Leave the CAI on!
Cooler air = more dense air = more oxygen in the same volume of aspirated air = more power.
It's a cold air intake, so the colder it is outside, the better it will perform.
Cooler air = more dense air = more oxygen in the same volume of aspirated air = more power.
It's a cold air intake, so the colder it is outside, the better it will perform.
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