Cool SC via AC

MoulaZ · 12-05-2016, 11:35 PM

Ooookay, back on topic, this is the first I've ever heard of this idea going mainstream, always was in the back of my mind before and I'm curious now.

For those complaining it would sap power, there was a standalone 12V option, a '2kw' system... but a 2kw compressor on a 12V system is an enourmous drain (166A+) if my math is right? Surely I'm missing something.

Cheers,
MoulaZ

SouthArk370Z · 12-06-2016, 05:54 AM

Quote:

Originally Posted by MoulaZ

... For those complaining it would sap power, there was a standalone 12V option, a '2kw' system... but a 2kw compressor on a 12V system is an enourmous drain (166A+) if my math is right? Surely I'm missing something.

Driving the compressor via a belt will be more efficient than driving a generator/alternator to produce electricity to drive a motor to drive the compressor. No conversion of energy is perfect - usually far from it.

But, yeah, it takes about 167A at 12V to produce 2kW.
P = I * E = 166.6A * 12V = 2kW

TopgunZ · 12-06-2016, 07:53 AM

Even without the parasitic loss from this...its still a gimmicky system. People probably have bought it and tell their buddies how awesome it is without collecting any data.

Honestly, this reminds me of the electric supercharger you put in your intake for $29.99 off of ebay except it costs $700..so it HAS to be good!

Again, i can see it maybe making sense on the drag strip...maybe. Where you sit in line, blast AC all over your aftercooler coolant, drop it below ambiant, turn your AC off and make a pull. Then its all over before the system heat soaks again. But in real world, street, track, this reeks of cheeze. Even on the strip you would be far better off dumping ice in the tank as stated before.

Basically, in order for this to be effective, the AC on a constant basis would have to out perform the under hood temps created from the engine plus the heat created from the supercharger, which are like 200+ degrees to begin.

TBatt · 12-06-2016, 08:44 AM

Top is correct. After logging many runs during my tune, I could see just how rapid the intake air temps would drop as soon as the boost was gone which means I still get the same amount of air density that I did on the first pull. A2A is simple and effective.

Thanks again TopgunZ for developing the A2A kit.

Zat_Zuma · 12-06-2016, 12:13 PM

The heat tables on the cooling required to cool the intake air volume/velocity is too large for the air conditioning unit in the vehicle. This was attempted on the Hemi's in 09 and failed miserably. It's too small to make a difference to IAT's , except at idle. Best bang for the buck is spraying the intercooler with water, during a run. But, eventually, the intercooler will be coated with calcium and loose efficiency and your no further ahead.

The biggest A2A intercooler possible, with Meth injection, is one long term solution, that makes sense and may last.

RadioFlyer · 12-07-2016, 08:07 PM

What does this system do when the AC shuts off when you go full throttle? All modern cars do that, so if this is run off the clutched AC compressor, then it ONLY works when the car is NOT at full throttle. Additionally, when it's only on when the AC compressor is engaged, then the drop in temp is probably only going to make up for the extra drag on the motor for turning the AC compressor.

12-06-2016, 07:53 AM	#3 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6835	Even without the parasitic loss from this...its still a gimmicky system. People probably have bought it and tell their buddies how awesome it is without collecting any data. Honestly, this reminds me of the electric supercharger you put in your intake for $29.99 off of ebay except it costs $700..so it HAS to be good! Again, i can see it maybe making sense on the drag strip...maybe. Where you sit in line, blast AC all over your aftercooler coolant, drop it below ambiant, turn your AC off and make a pull. Then its all over before the system heat soaks again. But in real world, street, track, this reeks of cheeze. Even on the strip you would be far better off dumping ice in the tank as stated before. Basically, in order for this to be effective, the AC on a constant basis would have to out perform the under hood temps created from the engine plus the heat created from the supercharger, which are like 200+ degrees to begin. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM Last edited by TopgunZ; 12-06-2016 at 08:14 AM.

12-06-2016, 08:44 AM	#4 (permalink)
TBatt Track Member Join Date: Apr 2013 Location: Huntsville, AL Posts: 832 Drives: 2019 GT-R Rep Power: 20169	Top is correct. After logging many runs during my tune, I could see just how rapid the intake air temps would drop as soon as the boost was gone which means I still get the same amount of air density that I did on the first pull. A2A is simple and effective. Thanks again TopgunZ for developing the A2A kit. TopgunZ likes this. __________________ RJM pedal, Hotchkis Sway Bars, FI TDX, FOG Light, Z1 Slotted Drilled rotors, Stillen SC, Quaife ATB, Z1 Oil cooler, AEM Gauge Set, Galeforce gauge mount, Avant Garde M590 Hypersilver w/RE-11, TopgunZ A2A kit., ECUtek tuned by Seb: ROLL TIDE!

12-06-2016, 12:13 PM	#5 (permalink)
Zat_Zuma A True Z Fanatic Join Date: Nov 2008 Location: Edmonton, Alberta ...eh Posts: 1,171 Drives: 2017 Touring auto Rep Power: 19	The heat tables on the cooling required to cool the intake air volume/velocity is too large for the air conditioning unit in the vehicle. This was attempted on the Hemi's in 09 and failed miserably. It's too small to make a difference to IAT's , except at idle. Best bang for the buck is spraying the intercooler with water, during a run. But, eventually, the intercooler will be coated with calcium and loose efficiency and your no further ahead. The biggest A2A intercooler possible, with Meth injection, is one long term solution, that makes sense and may last. __________________ [B]2009 & 2017 370Z Touring Sport Autos SOLD

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12-05-2016, 11:35 PM	#1 (permalink)
MoulaZ Base Member Join Date: Jun 2013 Location: Sydney, Australia Posts: 230 Drives: '09 Z34 BP Turbo V2 Rep Power: 26	Ooookay, back on topic, this is the first I've ever heard of this idea going mainstream, always was in the back of my mind before and I'm curious now. For those complaining it would sap power, there was a standalone 12V option, a '2kw' system... but a 2kw compressor on a 12V system is an enourmous drain (166A+) if my math is right? Surely I'm missing something. Cheers, MoulaZ

12-07-2016, 08:07 PM	#6 (permalink)
RadioFlyer Base Member Join Date: Aug 2014 Location: Los Angeles, CA. Posts: 193 Drives: 08 G37S S/C Rep Power: 40	What does this system do when the AC shuts off when you go full throttle? All modern cars do that, so if this is run off the clutched AC compressor, then it ONLY works when the car is NOT at full throttle. Additionally, when it's only on when the AC compressor is engaged, then the drop in temp is probably only going to make up for the extra drag on the motor for turning the AC compressor.