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Old 11-30-2006, 10:03 PM   #21
mjo
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1995 SL2
Default Re: Hot air intake

The HAI is out of commission because of a leaking heater core (which gets worse the warmer the coolant gets). I don't thing the HAI caused this because the car's been seeping for a year now. Thought I fixed it when I replaced the coolant pump

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Old 12-01-2006, 02:32 AM   #22
98greenSC2
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Default Re: Hot air intake

I think, and correct me if I'm wrong, that basic physics says it takes a certain amount of energy to move an object of a certain weight at a certain speed. So, in theory, a car with a CAI and one with a HAI (assuming everything else is equal) will use the same amount of power to move at the same speed.

However, might the HAI has a slight advantage because of the less dense air requires the driver to open the throttle more to compensate? Wouldn't a more open throttle reduce parasitic pumping losses?

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Old 02-12-2007, 03:20 PM   #23
mjo
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Default Re: Hot air intake

Here's an update on the hot air intake mod. It definitely helps with fuel economy. After fixing the coolant leak from the heater core, the coolant temperature gauge always reads within the normal range. I also put in a new O2 sensor. My current MPG averages are 33-35 MPG for ambient air temps around 30-40 degree Fahrenheit. The cold weather I have been experiencing lately where the temperatures have been close to zero the mileage has been between 28-30. I did a 200 mile trip recently where I calculated the FE to be above 36 MPG; the ambient air temp was in the 20s and this trip took 6 hours because of the horrible icy weather I had to drive through.

Overall it looks like a fantastic, cheap, easy, winter mod for the DIY.

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