I have a 2002 with an aem cold air intake. Ive heard of people re-routing their ac into their air filter to give them more and colder air to increase hp. Has anyone done this with a 3g? Would the power gain be worth it? how hard do ya think it would be?
freeman88
All I will say is don't do it. Just a waste of time and money, for minimal gains if gains at all.
Sure.
1st.. any gains you COULD get.. would be null considering the additional toll the AC Compressor is taking on the engine.
2nd.. how stupid will you look.. seriously.
1st.. any gains you COULD get.. would be null considering the additional toll the AC Compressor is taking on the engine.
2nd.. how stupid will you look.. seriously.
the theory isn't that bad, superchargers "take a toll" on the engine. I mean, I doubt it would work, but who knows. Its not totally unheard of, to have a process that uses energy from the engine to increase total effiency.
I know, I know...... two totally different ideas
I know, I know...... two totally different ideas
How would that even work? Your air conditioning system is closed loop and you'd lose all your freon trying to plumb it into your intake.
he meant, and let me just call you out on your stupid moment here, that he'd use a heat exchanger in the intake to cool the intake charge. basically take the evaporator and box it into the intake before the MAF and IAT to allow the car to suck in some very cold air for a short period of time until the cold evaporator warmed back upto ambient temperature. IIRC the 3G ECU will disengage the AC compressor clutch after 2-3 seconds of full throttle acceleration for some reason or another, possibly so that big sudden changes in engine RPM (like a hard upshift) wont hurt the compressor clutch or damage the belt.
Well sorry for my stupid moment when there were no details given. For all I know, he could have been dumping freon directly into his intake :ugh:
And FYI, the AC compressor clutch disengages at all times and through the full duration of wide-open throttle.
And FYI, the AC compressor clutch disengages at all times and through the full duration of wide-open throttle.
There are many processes in this world that seem like they would work but don’t because of the relationship between the amount of energy generated that is available to do the work and the amount of energy required to actually do the work are not in the proper relationship.
As an example if you take a liter bottle of diet soda and drop a couple of Mentoes tabs into it you will get a violent reaction. To the casual observer the aggressive jet of soda from the bottle might seem like a good candidate for a means of propulsion, but the student of engineering knows that even though we see an impressive release of energy in this reaction that amount of energy is going to need to be greater than the energy required to overcome the mass of the liter of soda and start it moving.
When you start to see things in rational terms relative to the processes that they control or are part of (cause and affect) you get a whole new view of the world. The 3G v6 has a 3 liter engine, it inhales air of that volume every few revolutions. In the very simplest terms take that volume and using your knowledge of 4 cycle operation, factor in the gear ratio for the average speed you are driving and you can get a formula to calculate the volume of air that your engine uses in a minute. With that knowledge you can then turn to the problem of figuring how long it takes to cool that volume of air X degrees from ambient.
By ambient I mean the temperature of the air from where you are getting it. Your Ac does a fair job of recirculating and further cooling the air in your passenger compartment but how cold is the air coming from the AC vents at startup when it is processing ambient air?
To test for the capacity of your AC system to produce cold air you could do this.
Close all the AC vents but one, put an air flow meter and a thermometer on that one vent, open all your windows and run the air to the outside of the car.
As an example if you take a liter bottle of diet soda and drop a couple of Mentoes tabs into it you will get a violent reaction. To the casual observer the aggressive jet of soda from the bottle might seem like a good candidate for a means of propulsion, but the student of engineering knows that even though we see an impressive release of energy in this reaction that amount of energy is going to need to be greater than the energy required to overcome the mass of the liter of soda and start it moving.
When you start to see things in rational terms relative to the processes that they control or are part of (cause and affect) you get a whole new view of the world. The 3G v6 has a 3 liter engine, it inhales air of that volume every few revolutions. In the very simplest terms take that volume and using your knowledge of 4 cycle operation, factor in the gear ratio for the average speed you are driving and you can get a formula to calculate the volume of air that your engine uses in a minute. With that knowledge you can then turn to the problem of figuring how long it takes to cool that volume of air X degrees from ambient.
By ambient I mean the temperature of the air from where you are getting it. Your Ac does a fair job of recirculating and further cooling the air in your passenger compartment but how cold is the air coming from the AC vents at startup when it is processing ambient air?
To test for the capacity of your AC system to produce cold air you could do this.
Close all the AC vents but one, put an air flow meter and a thermometer on that one vent, open all your windows and run the air to the outside of the car.
This just reminds me of that vid where the guy routed his intake into the cab of his car..... stupid IMO.
If your really serious about gettin colder air into you intake you might wanna check this CryO2 stuff put out by DIE. It hooks up to your intake or into your FMIC to lower the temp on the air here is a link. http://www.designengineering.com/products.asp?m=sp&pid=4
well, in accepted theory, the engine gains 1% hp for every 10 degrees colder air it gets.
say the ac is blowing the coldest air it possibly can (assuming that the AC is routed into the intake pipe) and then mix that with the ambiant air that is in the engine, i would guess that the final temp after the intake mani would be 60. normal intake mani temp, after the air moved thru the intake pipe, is 75-80. so thats a gain of 3 hp on our engines.
but then theres the parasitic loss that the AC belt creates when you turn it on. i dont know the numbers for that but i would say my butt dyno tells me i lost 5-10 hp.
savvy?
say the ac is blowing the coldest air it possibly can (assuming that the AC is routed into the intake pipe) and then mix that with the ambiant air that is in the engine, i would guess that the final temp after the intake mani would be 60. normal intake mani temp, after the air moved thru the intake pipe, is 75-80. so thats a gain of 3 hp on our engines.
but then theres the parasitic loss that the AC belt creates when you turn it on. i dont know the numbers for that but i would say my butt dyno tells me i lost 5-10 hp.
savvy?
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