ac questions and experiment

[gman2801]

all right, well a few friends and i were talking about our cars and what we could do to get even more power, and i suggested the i should hook the ac up to my intake. well i have a few questions and concerns. well to start off, has anyone even tried it, ya i know it would be alot of fabrication, but i have a friend that has a dyno in his shop that i can use if i even do it. any ways lets get started.... ive been thinking it is possible, but ive been looking around, and before u think im dumb or anything, i usually dont get to do research until i get off work.. i work 18hrs a day, 2 jobs.... ya tell me about it so i usually fall asleep.. well anyways, i was woundering what the dew point is on our engines, so that i wont be producing moisture in my cylinders, fouling out pluggs, ect.... i was just woundering. thanks for ur help

[deevergote]

Would the power gains of the cold air generated by the AC be greater than the parasitic losses caused by running the AC compressor?

At normal operating temperatures, I don't believe any moisture could form in the cylinders... it's way too hot. Any minimal moisture formed would serve to suppress detonation anyway. AC is usually devoid of moisture anyway, which is why it works to defog the windows.



I don't think it would work, seeing as the drag of the compressor would probably be greater than the benefit of the cold air... but it's worth a try! If you have access to a dyno, you can find out if it works for real, so it's definitley worth finding out

[yellaboi]

This was discussed a long time ago on another board. Hondatech or g2ic. It was concluded that it didn't work and then someone tried it and it didn't make a bit of difference.

Not to discourage you though, I love seeing new ideas being tested.

[rickyduckworth]

it's been done and proven a waste over and over.

[deevergote]

I'd be curious to see it done on a dyno... I don't have much hope for the idea, but how often can someone test something like this on a dyno?

[yellaboi]

I'll try to find where I saw it before, but it was dynoed and no power was made.

[12gage]

Just take the compressor off and get a bypass belt then. youll see about a 10 hp gain. correct me if im wrong.

[rickyduckworth]

Just take the compressor off and get a bypass belt then. youll see about a 10 hp gain. correct me if im wrong.

when they rate engines, they do it without all the parasitic losses, so an ex rated at 140hp will make 140hp (at the crank) or LESS depending on whether or not the a/c is on, how hot it is, humidity, etc. you don't see gains by not creating parasitic loss situations.

the effect a/c has on engines is overrated quite a bit too. they don't cause as much loss as what people think (5hp is about average) and they don't cause excess fuel consumption (rare that it will change the average 1mpg per tank) and it's really a waste to pull all the stuff off when you're a ricer wannabe.

[Losiracer2]

the effect a/c has on engines is overrated quite a bit too. they don't cause as much loss as what people think (5hp is about average) and they don't cause excess fuel consumption (rare that it will change the average 1mpg per tank) and it's really a waste to pull all the stuff off when you're a ricer wannabe.

This is true. I achieved 32.2 mpg running my A/C full blast on a 100 mile trip. It does decrease acceleration to where i can notice it a little bit though. But as for hurting mpg, its not worth the time to delete A/C IMO.

[gman2801]

well guys what i was thinking, is more like a supercharger.... i want to hook it straight to the throttle body since the ac has a filter already on it, i was thinking that it would more or less force more air into the cylinders, and not only more air, but colder air, we all know our ac blows freezing cold anyways, plus i need a new experiment, im kida running out of things to do to my car, plus if by any chance something does mess up, i need a rebulid anyways. but thanks for the imput guys, keep it coming.....

[Accord R33]

Would the power gains of the cold air generated by the AC be greater than the parasitic losses caused by running the AC compressor?

A supercharger works in the same fashion


But you are right. this will never work. it is a waste of time.

[yellaboi]

A supercharger works in the same fashion


But you are right. this will never work. it is a waste of time.

but a supercharger is actually forcing air into the chamber.

The a/c would never have enough pressure to cause any boost. Just SLIGHTLY cooler air. Even if you made power, I doubt it would be enough to warrant the time and money you putinto it

It would be easier to just get one of those CO2 collars that go on your intake.

[Accord R33]

but a supercharger is actually forcing air into the chamber.

The a/c would never have enough pressure to cause any boost. Just SLIGHTLY cooler air. Even if you made power, I doubt it would be enough to warrant the time and money you putinto it

It would be easier to just get one of those CO2 collars that go on your intake.

I know that. im just saying you cant use the parasite argument as the sole reason why it wont work. The problem is that the air density increase you get from the Cold, A/C air, is negligible compared to something like a supercharger that is designed to actually pump more air.

[yellaboi]

I think that was the point deevergote was trying to make. That the minimal power made by that cold air would probably negate or balance out to the power lost by the compressor.

[lokuputha]

Y not route an intake pipe to the front of the bumper, thats what I setup....ram-air...

It works great and I seem to need less throttle on the highway now.