UnderPulley Question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

20camaro12 · 11-18-2011, 11:23 AM

Does anyone have an under pulley installed? Which one? Has it affected the steering pump or AC at all? Ive seen a few threads here and there that say under pulleys are great, but affect the other components. I would hate to install one on the camaro and have the feel of the steering go to poop. My mazda 6 had an under pulley with no problems. Thanks!

The Stig · 11-18-2011, 11:27 AM

You're A/C will take a hit, as it runs off of the same pulley.

20camaro12 · 11-18-2011, 11:48 AM

How so?

JCL-2SS · 11-18-2011, 12:02 PM

Hi have the SLP pulley and i dont notice any difference in electric usage, but when i do idle for over 5-10 minutes i notice my voltmeter drops below 11 amps, I have a jannetty tune and im going to see about bumping the idle rpms from 550k stock i believe to like 700-750k, also i think there is a smaller alternator pulley you can put on to balance this out.

Charlie

The Stig · 11-18-2011, 01:40 PM

Quote:

Originally Posted by 20camaro12

How so?

As in if you have the A/C blasting you will see a drop in your battery voltage.

Jcobra · 11-18-2011, 03:49 PM

Quote:

Originally Posted by stieger

As in if you have the A/C blasting you will see a drop in your battery voltage.

Is that a big deal?? Any long term issues?

SC2150 · 11-18-2011, 04:07 PM

Get the RX billet Alt overdrive pulley. Cures the issue.

Chris@SPMC · 11-18-2011, 04:35 PM

Quote:

Originally Posted by SC2150

Get the RX billet Alt overdrive pulley. Cures the issue.

Or if you're throwing in a cam at the same time bumping the idle speed ~150rpm will offset the 25% reduction

JDP Motorsports · 11-18-2011, 07:39 PM

I think a 25% reduction is too much especially for these cars. I use an Innovators West 10% reduction damper on my Camaro and it works great!

Please feel free to call, email or PM me anytime with questions.

Kind regards,

Jordan Priestley
888.308.6007

MRGOODWRENCH3 · 11-18-2011, 07:42 PM

Quote:

Originally Posted by stieger

You're A/C will take a hit, as it runs off of the same pulley.

Incorrect.
Check out the Fluidampr 25% under drive pulley for the Camaro. The AC pulley is stock size. The Alt, PS and WP are under driven. I have seen and felt no adverse affects. Charging system and coolant temp is perfect.

http://www.camaro5.com/forums/showth...ight=Fluidampr

Parag · 11-18-2011, 07:51 PM

One of the sponsors make one that doesnt reduce the size of the ac pulley only the operations pulley. I thought it was sweet

MRGOODWRENCH3 · 11-18-2011, 08:45 PM

Quote:

Originally Posted by Parag

One of the sponsors make one that doesnt reduce the size of the ac pulley only the operations pulley. I thought it was sweet

Again Fluidampr.

The Stig · 11-18-2011, 08:49 PM

Quote:

Originally Posted by MRGOODWRENCH3

Incorrect.
Check out the Fluidampr 25% under drive pulley for the Camaro. The AC pulley is stock size. The Alt, PS and WP are under driven. I have seen and felt no adverse affects. Charging system and coolant temp is perfect.

http://www.camaro5.com/forums/showth...ight=Fluidampr

Yes I understand that Fluidampr's pulley (which just came out btw) retains the stock A/C pulley size. But it is the only pulley to do so as far as I know. So yes, if the OP buys that pulley brand than his A/C won't take a hit.

bannonm · 11-18-2011, 09:50 PM

So what kinds of HP savings will you see with a 25% pulley? I saw the Fluidampr pully is about $200. Wondering if there is enough gain for the price.

11-18-2011, 11:23 AM	#1
20camaro12 Drives: 2012 45th anniv. Convertible SS LS3 Join Date: Oct 2011 Location: Riverside, CA Posts: 321 View My Garage	UnderPulley Question Does anyone have an under pulley installed? Which one? Has it affected the steering pump or AC at all? Ive seen a few threads here and there that say under pulleys are great, but affect the other components. I would hate to install one on the camaro and have the feel of the steering go to poop. My mazda 6 had an under pulley with no problems. Thanks!

11-18-2011, 11:27 AM	#2
The Stig knows 2 facts about ducks Drives: ...and they're both wrong Join Date: Aug 2009 Location: The HMS Invincible Posts: 25,072 View My Garage	You're A/C will take a hit, as it runs off of the same pulley. __________________

11-18-2011, 12:02 PM	#4
JCL-2SS Drives: 2010 2SS Imperial Blue Join Date: Mar 2010 Location: Lindenhurst, NY Posts: 216	Underdrive Pulley Hi have the SLP pulley and i dont notice any difference in electric usage, but when i do idle for over 5-10 minutes i notice my voltmeter drops below 11 amps, I have a jannetty tune and im going to see about bumping the idle rpms from 550k stock i believe to like 700-750k, also i think there is a smaller alternator pulley you can put on to balance this out. Charlie __________________ 2010 2SS IBM L99 6A, Janetty Tune, Dynatech headers and cats, Flowmaster exaust, SLP underdive pulley, CAI inc. CAI, MSD wires, LED's -taillights, side markers, knight rider, interior, Chevy emblem, rear plate

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11-18-2011, 11:48 AM	#3
20camaro12 Drives: 2012 45th anniv. Convertible SS LS3 Join Date: Oct 2011 Location: Riverside, CA Posts: 321 View My Garage	How so?

11-18-2011, 04:07 PM	#7
SC2150 Account Suspended Drives: 2012 Camaro RS, RX supercharged Join Date: Dec 2009 Location: Bradenton, FL Posts: 6,063	Get the RX billet Alt overdrive pulley. Cures the issue.

11-18-2011, 07:39 PM	#9
JDP Motorsports Drives: 2011 Camaro SS/ 2016 Camaro SS Join Date: Jun 2009 Location: Sandy, Utah Posts: 3,256	I think a 25% reduction is too much especially for these cars. I use an Innovators West 10% reduction damper on my Camaro and it works great! Please feel free to call, email or PM me anytime with questions. Kind regards, Jordan Priestley 888.308.6007

11-18-2011, 07:51 PM	#11
Parag Drives: 2010 camaro 2SS LS3 Join Date: Aug 2011 Location: Denver Posts: 1,334	One of the sponsors make one that doesnt reduce the size of the ac pulley only the operations pulley. I thought it was sweet

11-18-2011, 09:50 PM	#14
bannonm Drives: 2011 2SS/RS M6 VR Join Date: Aug 2011 Location: Chicagoland Posts: 1,536	So what kinds of HP savings will you see with a 25% pulley? I saw the Fluidampr pully is about $200. Wondering if there is enough gain for the price.