Conditioned C.A. I. Reserve

drexchan

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drexchan

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This is a crazy idea to channel some conditioned cold air from the cabin (foot blower) into the airbox reserve compartment.

Why the "foot blower"? This is the least used function of the a/c system. I don't use it, my wife don't use it, no one use it so why waste it?

Setting? Set the blower direction to the middle of "face" and "foot". Speed is controled by the blower fan speed, temperature controled by the thermostat knob.

The stock intake is still the main intake. Only a small amount of conditioned air from the cabin is blown into the reserve compartment of the airbox, accumulating there at low RPM speed, and surge out during acceleration. Air taken by the engine will be filled by the air seeping into the cabin through the tiny gabs and holes around the car (you think it's air tight don't you?).

How it goes? Well? If set at max blower speed, can hear a sharp whinning sound presumably from the corrugated hose. The sound is even sharper and louder in the airbox. With all four blower windows on the dashboard closed, I can hear my car singing with different tone at different RPM! Haha!

Without the filter element in the airbox, I can feel a constant stream of "cool breeze" flowing out from the reserve compartment. Quite strong, that i think strong enough to cool down the temperature of the intake charge. By 2 deg C? I have no idea, but i purposely put it before the ITC sensor so that any change in the temperature can be accurately measured.

Monitoring the engine smoothness, FC and performance. Should be useful for hot sunny day craw without worrying about the lifespan of the blower motor (as in another idea of my friend), or get suffocated in the cabin (some suggested to plug the engine intake on the firewall).

http://drexchan.fotopic.net/c980297.html
 

drexchan

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drexchan

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SkYwAlKeR said:
wah brader.... respect lar sifoo...
but will it suck too much a/c air when u rev high, making ur a/c choke??...
no lar.. the corrugated tube/hose is less than 2.0 cm in diameter.. not much air is blown into the airbox. Remember, air is blown into the airbox by the electrical blower, not being sucked in by the engine.

How much air entering the airbox depends on the fan speed and the opening/closure of the a/c vents on the dashboard.
 

nitrus

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nitrus

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hmm... wat if a person dun normally drive with aircond on? this DIY wont work right?
 

drexchan

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nitrus said:
hmm... wat if a person dun normally drive with aircond on? this DIY wont work right?
That's for sure. Since the diameter of the tube is quite small, and the blower motor isn't strong enough to generate any positive boost, it will be useless to run the blower without running the compressor to cool the air.

The idea of this DIY is to improve the drivability especially during hot sunny day craw such as in traffic jam, which the engine speed is not very high from the idling..

The effect will be negligeable at higher RPM even with extra cool air supplied to the airbox. The flow mass of air through the main intake would be too high to be effectively cooled down.
 

nitrus

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drexchan said:
That's for sure. Since the diameter of the tube is quite small, and the blower motor isn't strong enough to generate any positive boost, it will be useless to run the blower without running the compressor to cool the air.

The idea of this DIY is to improve the drivability especially during hot sunny day craw such as in traffic jam, which the engine speed is not very high from the idling..

The effect will be negligeable at higher RPM even with extra cool air supplied to the airbox. The flow mass of air through the main intake would be too high to be effectively cooled down.
I get u bro .. But its a cool diy !! good idea too .. juz that i guess tat the most hardest part is putting the rubber on the firewall back in place right? mwahhahaahaha.. Coz i took it out from the door side b4 too, dem hard to put back... For ur case maybe not tho hehee..

I dont drive with the aircond set to the foot blower tho, coz if we do, it'll give less air to the main part of the aircond right? Since its all distributed to the top n foot blower...?
 

gohkokeng

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gohkokeng

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Super Cold Air intake + Super High Flow Intake.....without bonet and without air filter

just use fine net to cover the combustion mouth lol
 

drexchan

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drexchan

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goh,

no. you need to keep the engine bay warm so that the coolant temperature is within the range for the engine to run optimumly. Furthermore, the aerodynamic of the car will be distorted without the bonnet.
 

drexchan

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drexchan

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BTW, just came back from a simple test.. 175++ km/h in 4th gear and still going but road not long enough.. that's red line in 4th gear. What you guys think?

setting: temperature 6 o'clock, blower speed 2 (of 4) with 2 center vents closed.
 

drexchan

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drexchan

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Will redo everything with a smooth tube/hose. The corrugated hose make a sharp and loud wissle sound at full blast... very annoying..
 

SkYwAlKeR

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drexchan said:
BTW, just came back from a simple test.. 175++ km/h in 4th gear and still going but road not long enough.. that's red line in 4th gear. What you guys think?

setting: temperature 6 o'clock, blower speed 2 (of 4) with 2 center vents closed.
wow... thats not bad, 175kmh...

btw, i thought with cold air intake, lower speed response will be better compare to high speed.... hmm...
 

huakenny

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huakenny

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high revving ur car with Aircon ON...it damage ur Aircon Compressor in long-run
 
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drexchan

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drexchan

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er.... my car automatically disable the compressor at full throttle to protect it.

But this is something good and something bad too.

If the compressor is disable at full throttle.. it means the temperature of the blown out air will raise very fast and there will not be any effect in the CAI reserve...

Just a while ok lar.. BTW the main objective of this modification is not to make the car faster.. i am more concern on the FC.
 

drexchan

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drexchan

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ok.. latest photos are up.. check the last 2 photos: http://drexchan.fotopic.net/c980297.html

Basically, re-wrapped the whole corrugated tube, connect it directly to the blower motor cooling vent, found and used another source of cold air to cool down the motor.

Now, it runs full time as long as the a/c is running. Lesser/weaker wissle sound.
 

dareMAX

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dareMAX

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Bravo and good job you got there. I been thinking this method since I got my satria. But my idea was a bit more complicated then what you have. I also dunno how my brain come out so many extras things. Huh!:confused_smile:

Anyway back to the topic, my idea was having a Tank/Servo from materials can keep cool that might store more cooler air before going into the box. Also a switch to control the Air going in or lock it. The best I see is fit was manual Boost controller from TRUST/GReedy, but too expensive oledi. Why TRUST/GReedy manual Boost Controller, because they got a bigger inner diameter hoses. Bigger hole more air. Currently I saw one merchant here zth (forgot his name) selling manual boost controller also RM128 or 138. That unit can be use but too small for the hose.
 
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dareMAX

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I been thinking using a OCT since it was made of Steel/Aluminium.
 

tykoh

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tykoh

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great diy man... really respect you guys... currently i'm using open pod so this project is difficult for me...
 
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