To the guys out there that a real handy or know alot, i was just wondering if the airflow from the airconditioning could be redirected into the air box to add cold air and maybe get some power gains im not sure if this subject has been brought up before or if someones had a go at this, i know there would be power loss from haing the A/C running in the first place but would the cold air being inducted work out better, obviously this is for someone who can live without airconditioning and also have something set up for demisting

Nothing is for free - every 3 degrees C you can reduce the intake temp is supposed to be worth 1hp - so you'll have to reduce the intake temp by 30C to recoup the 10hp it takes to run the AC compressor.

if the AC takes 10hp that is - anyone know how much power the AC saps from the engine? Anyone put AC on while on the dyno?

G.

You couldnt supply enough cold air for the motors requirements.

we had this arguement at work - the workshop manager was SURE that if he rerouted the AC lines through the airbox he would get more power.

Until the parts guy and i pointed out -that the AC compressor takes power from the engine to run to make the cold air.
the cold air con pipes, will not chill the incoming air charge (evenly) or sufficiently to make it worth while.
and at the end of that excercise - AC is for chilling the interior - not the incoming air charge.

If you want to lower the air intake charge temps - pack around the airbox with Dry Ice, but that will open a whole lot of other problems. (so dont do it!)

OK, I had my car on the dyno recently in the heat in SA & lost 10KW ATW during one run. Couldn't figure out why, until we realised the A/C was on. Turned it off - power back up.

Point is, if you're going to lose 10KWs with the A/C on to give more cold air to the eninge, are you going to gain more than the 10KW that you just lost? If not, then it's not worth it.

if one had an evap core in the ducting and chilled it to say - 20 degrees before a drag then the ice would chill the air.... but there may be a restriction in the flow

what about just running the fan by itself does that use power? and if u could re-route that and have a higher air intake?

ok another idea... are there any tiny room airconditioners that weigh areound 10-20 kg that u cold hook up in your boot and re route the air flow into the airbox etc.. would that give you performance or would u still fail with the extra weight something like this http://www.kooleraire.com/index.htm

Im pretty sure that would do the same as an electric supercharger... i.e. nothing... Imo It would be easier just to modify your air intake to a CAI setup or something...

yea but CAI arent unique (even though there are some unique CAI out there) im just thinking the uniquness of it a car getting more power from airconditioning

yea but CAI arent unique (even though there are some unique CAI out there) im just thinking the uniquness of it a car getting more power from airconditioning

It is an absolute impossibility and a law of Physics that you can't create power from nothing. The air con compressor is being powered by the engine's rotation which saps output. Redirecting the cold air into the airbox will give you a net loss of power between normal output and output with air conditioning on.

Once the scientists at CERN in France run the LHC properly we should be able to prove that matter can be made from nothing, and will be one step closer to many other theories. This won't happen in a Magna mate

It is an absolute impossibility and a law of Physics that you can't create power from nothing. The air con compressor is being powered by the engine's rotation which saps output. Redirecting the cold air into the airbox will give you a net loss of power between normal output and output with air conditioning on.

Once the scientists at CERN in France run the LHC properly we should be able to prove that matter can be made from nothing, and will be one step closer to many other theories. This won't happen in a Magna mate

it wouldnt be gettting power from nothing, the power would come from having a colder intake air, which in turn is denser, to compensate this the engine burns more fuel, this is where the extra power comes from. the problem with using the aircon is that its too inefficient,
what about a supercharger? it saps power from the engine, becuase it requires a lot of energy to run.
yet you get a lot of power, its not creating power from nothing, it just has better effiecncy than the air con

it wouldnt be gettting power from nothing, the power would come from having a colder intake air, which in turn is denser, to compensate this the engine burns more fuel, this is where the extra power comes from. the problem with using the aircon is that its too inefficient,
what about a supercharger? it saps power from the engine, becuase it requires a lot of energy to run.
yet you get a lot of power, its not creating power from nothing, it just has better effiecncy than the air con

Yeah I hadn't really thought about the theory of superchargers :facejump: I have had a tough week. Well that being said, perhaps there is a possible gain but it is very unlikely that the gain will be enough to overcome the extra workload of the engine powering the compressor.

old xj jags had fuel line chillers incorporated into the a/c.... food for thought

How about a petrol powered blower vac forcing air into the intake - electronic supercharger that is a bit more than a 12V PC fan - I think I saw someone do this on Youtube.
Huge power increase and huge bang from the engine a little later :)

its a good idea but it wouldnt work in theory

its a good idea but it wouldnt work in theory

Which idea?
Leaf blower vid here: http://www.youtube.com/watch?v=dyR0U_fYtwY

As for using the AC to cool the air intake - it's only problem is that there's too many inefficiencies occuring.

How about instead using electrical energy from the battery to cool that air intake?
It could be triggered then so that there's time to recharge the battery between uses - that way it's like F1's kinetic energy storage.

EG: Some people use Peltier devices for cooling computer CPUs - It's basically an electrical "plate" that gets cold on one side (even below zero C) and hot on the other side. A few of those mounted to an intercooler on an NA car may cool the air intake without a serious power drain on the engine - the alternator may be working harder while the Peltiers are switch on, and they'd have to be manually triggered some time before you wanted max power, probably by a minute if they need to cool a big intercooler.

I'm talking back in the eighties now when I was running my 27PSI boost weapon, there was a guy with a Datsun 200B here in Brisbane that was running 30+PSI with an air conditioner refrigerating the intercooler. I don't know the details but Mike Vine did mine & also this one & he said it had a rediculous amount of power & when you were gonna give it some, you would put it on the line in the middle of the road, hold on then floor it. lol

I also believe this car was running a 4 barrell Holley carby with methanol secondaries which was the next step for my car but I ended up selling it & stepping up to a 6 cylinder.

the real electric superchargers are more like a startermotor with an impellor... down side is they can only be used for 13 second bursts... not to mention they draw a lot of current and will eventually hurt the alternator

in my experience peltier devices take too long to get cold

perhaps a nitrogen shot thru a cooling tube in the air intake would work

*Boost Pimp*.

*Shakes head*

And I thought I was bad with a 24PSI Sylvia.


..... we should be able to prove that matter can be made from nothing, and will be one step closer to many other theories. This won't happen in a Magna mate

Actually, matter is condensed energy. Matter comes from the fusion reaction in stars.

If you could convert all of the matter in a biro, you would release the equivalent of an atomic bomb.

There must be an application somewhere here for a Magna....:hmm:

*Shakes head*

And I thought I was bad with a 24PSI Sylvia.



Actually, matter is condensed energy. Matter comes from the fusion reaction in stars.

If you could convert all of the matter in a biro, you would release the equivalent of an atomic bomb.

There must be an application somewhere here for a Magna....:hmm:

Depends what matter you are referring to, as the theory is different in quantum mechanics and everyday life

yea but CAI arent unique (even though there are some unique CAI out there) im just thinking the uniquness of it a car getting more power from airconditioning

:bowrofl:
Thats gold man.

"bro, that CAI isnt unique....chek DIS out for unique!"

the idea is so stupid it makes me head hurt, why dont you actually do some real modifications to the car? how about these magical mystical things called "aftermarket camshafts" which, without the use of an air con compressor, actually give you gains!*







*unless they are tighe cams.