Feel's weaker

killak20z3R · 08-13-2009, 02:19 AM

When a/c is on feel loss of power [/size]

***Exeon*** · 08-13-2009, 02:23 AM

what?

civic817 · 08-13-2009, 02:24 AM

i think thats normal mine feels the same when i got my ac on

fishermoe14 · 08-13-2009, 02:25 AM

yea that happens.. we have tiny cars..

Montgomery5145 · 08-13-2009, 02:38 AM

I have an Em2. Anytime I'm merging on the highway or just need some extra gas. IF my A/C is running I shut it off,you can feel/hear the diference definetly.

24boosted · 08-13-2009, 02:45 AM

AC is belt driven, pulls on the engine to run. It knocks out 10-15 hp when it's on.

miketat594 · 08-13-2009, 02:52 AM

Yes AC takes extra power and will take away alot of bottom end trq.

Vsin · 08-13-2009, 03:02 AM

That's why torquey cars have better air conditioning.

kene79 · 08-13-2009, 11:00 AM

get the nst 3 piece pullies and problem solved. worked for me.

devani · 08-13-2009, 11:41 AM

only have AC on when driving highway....

***cderalow*** · 08-13-2009, 12:03 PM

Quote:

Originally Posted by 24boosted

AC is belt driven, pulls on the engine to run. It knocks out 10-15 hp when it's on.

it's actually about 3%, which is closer to 10hp than 15hp.

joey.walla · 08-13-2009, 12:07 PM

all inline 4's have this problem

24boosted · 08-13-2009, 01:41 PM

Quote:

Originally Posted by cderalow

it's actually about 3%, which is closer to 10hp than 15hp.

3% of a 140 hp engine is not 10 hp, neither is 3% of 197. Less than 6 whp loss on the k20 won't be noticeable. Someone dynoed their car on here with the ac on and it was nearly a 20 whp loss. 3% is inaccurate, that's saying the less power a motor makes the less the power loss with ac on.

NightFlight · 08-13-2009, 02:45 PM

Quote:

Originally Posted by 24boosted

3% of a 140 hp engine is not 10 hp, neither is 3% of 197. Less than 6 whp loss on the k20 won't be noticeable. Someone dynoed their car on here with the ac on and it was nearly a 20 whp loss. 3% is inaccurate, that's saying the less power a motor makes the less the power loss with ac on.

I thought that the compressor cycles off whenever the vehicle is above 3/4 throttle???

My Acura does that and so does my CR-V....

bro2snakeaterblk08 · 08-13-2009, 03:13 PM

^The civic/Si is the same. On top of throttle position, the AC also deactivates based on RPMs as well.

NightFlight · 08-13-2009, 03:31 PM

Quote:

Originally Posted by bro2snakeaterblk08

^The civic/Si is the same. On top of throttle position, the AC also deactivates based on RPMs as well.

So how are people dynoing 20WHP less with the AC on?

***pineapple*** · 08-13-2009, 03:37 PM

Quote:

Originally Posted by NightFlight

So how are people dynoing 20WHP less with the AC on?

The same way people stack ****, upon ****, upon ****. Then you have one massive pile of **** and people just say they know who put the **** there. No one knows. They just keep stacking it up.

NightFlight · 08-13-2009, 03:39 PM

Quote:

Originally Posted by pineapple

The same way people stack ****, upon ****, upon ****. Then you have one massive pile of **** and people just say they know who put the **** there. No one knows. They just keep stacking it up.

Yeah, that is what I thought....

bro2snakeaterblk08 · 08-13-2009, 03:44 PM

Quote:

Originally Posted by NightFlight

So how are people dynoing 20WHP less with the AC on?

In the lower to mid range maybe. Im not 100% sure when the AC turns off in an Si but it feels like in the 4.5K range when i drive spirited in my Si. On a dyno i can see it making less power up to that point but once the compressed clutch disengages, it should make the same power in the top end.

What kind of moron would dyno the car with the AC running unless its for scientific purposes.

Show me the dyno sheet of the 20hp loss from start to redline.

habitat · 08-13-2009, 04:25 PM

I don't feel any difference at all. The car always feels like it is struggling for power, having such an inadequate and small a/c compressor doesn't add any noticeable parasitic power loss.

08-13-2009, 02:19 AM	#1 (permalink)
killak20z3R Senior Member Join Date: Feb 2009 Location: Fresno killa cali (559) Age: 26 Posts: 251 James Capps (amesoner) iTrader: 0 / 0%	Feel's weaker When a/c is on feel loss of power [/size]

08-13-2009, 02:23 AM	#2 (permalink)
*Exeon* needs more vtec fluid Join Date: Mar 2006 Location: Burnsville, MN Age: 23 Posts: 3,529 David iTrader: 24 / 100%	what? __________________

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08-13-2009, 02:24 AM	#3 (permalink)
civic817 Senior Member Join Date: May 2009 Location: funky town Posts: 228 silent iTrader: 0 / 0%	i think thats normal mine feels the same when i got my ac on

08-13-2009, 02:25 AM	#4 (permalink)
fishermoe14 Senior Member Join Date: Oct 2007 Location: Minnesota Posts: 1,562 Moe iTrader: 0 / 0%	yea that happens.. we have tiny cars..

08-13-2009, 02:38 AM	#5 (permalink)
Montgomery5145 Member Join Date: Jul 2009 Location: RvA 804 Posts: 36 Monty iTrader: 0 / 0%	I have an Em2. Anytime I'm merging on the highway or just need some extra gas. IF my A/C is running I shut it off,you can feel/hear the diference definetly.

08-13-2009, 02:45 AM	#6 (permalink)
24boosted Senior Member Join Date: Jan 2007 Posts: 3,433 iTrader: 0 / 0%	AC is belt driven, pulls on the engine to run. It knocks out 10-15 hp when it's on.

08-13-2009, 02:52 AM	#7 (permalink)
miketat594 Senior Member Join Date: Sep 2007 Location: Middletown Posts: 2,138 Mike iTrader: 7 / 100%	Yes AC takes extra power and will take away alot of bottom end trq.

08-13-2009, 03:02 AM	#8 (permalink)
Vsin Senior Member Join Date: Jun 2007 Location: La Jolla, CA Posts: 1,115 iTrader: 0 / 0%	That's why torquey cars have better air conditioning.

08-13-2009, 11:00 AM	#9 (permalink)
kene79 Senior Member Member Join Date: Jul 2007 Location: In Hell Posts: 1,500 Kene iTrader: 1 / 100%	get the nst 3 piece pullies and problem solved. worked for me.

08-13-2009, 11:41 AM	#10 (permalink)
devani Senior Member Join Date: Nov 2008 Location: NJ Posts: 762 iTrader: 1 / 100%	only have AC on when driving highway....

08-13-2009, 12:07 PM	#12 (permalink)
joey.walla Senior Member Join Date: Aug 2008 Location: 4.5K in 6th Age: 20 Posts: 2,079 Joey iTrader: 4 / 100%	all inline 4's have this problem

08-13-2009, 03:13 PM	#15 (permalink)
bro2snakeaterblk08 Senior Member Join Date: May 2009 Location: Never in one place for too long Posts: 2,194 iTrader: 6 / 100%	^The civic/Si is the same. On top of throttle position, the AC also deactivates based on RPMs as well.

08-13-2009, 04:25 PM	#20 (permalink)
habitat Senior Member Join Date: Jan 2008 Location: NorCal Age: 25 Posts: 4,352 iTrader: 1 / 100%	I don't feel any difference at all. The car always feels like it is struggling for power, having such an inadequate and small a/c compressor doesn't add any noticeable parasitic power loss.