underdrive pulley worth it? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

djxrated81 · 01-19-2012, 08:37 AM

SLP's underdrive pulley is it worth getting, do You need anything else to go with it etc...

Parag · 01-19-2012, 10:32 AM

A bitch to install, and chance of dead battery. Not recommended by me

djxrated81 · 01-19-2012, 10:34 AM

K thanks

SSDan · 01-19-2012, 11:21 AM

I have this same question and could use some more input. In two weeks I'm having a cam and bolt-on package done. So, I will pay no extra labor for the pulley install since the OEM pulley has to come off anyway. I hear pros about this pullyey such as it's cheap HP (5 - 8 HP for $200 -250). And the risks of a dead battery are oversated since a cammed car will have a higher idle speed anyway and that offsets the lower accessory rpms from the UD pulley. I dunno? I live in SC and the heat is tough on batteries anyway plus I certainly don't want any A/C performance issues. Folks who have a UD pulley on a cammed car - what has been your experience? Would you do it again or not and why? Any feedback would be appreciated.

Falundir · 01-19-2012, 11:30 AM

Quote:

Originally Posted by Parag

A bitch to install, and chance of dead battery. Not recommended by me

I have the exact opposite experience. 15 minutes to install, and my voltage levels are only .5 less. I don't run any heavy stereo equipment however, just stock radio. If you plan on running power hungry electronics you will need to also install a capacitor.

You will gain between 10-15hp on average for the UDP, so just figure the $/hp ratio and see if it makes financial sense for where you are at in your mod list.

Falundir · 01-19-2012, 11:32 AM

Quote:

Originally Posted by SSDan

I have this same question and could use some more input. In two weeks I'm having a cam and bolt-on package done. So, I will pay no extra labor for the pulley install since the OEM pulley has to come off anyway. I hear pros about this pullyey such as it's cheap HP (5 - 8 HP for $200 -250). And the risks of a dead battery are oversated since a cammed car will have a higher idle speed anyway and that offsets the lower accessory rpms from the UD pulley. I dunno? I live in SC and the heat is tough on batteries anyway plus I certainly don't want any A/C performance issues. Folks who have a UD pulley on a cammed car - what has been your experience? Would you do it again or not and why? Any feedback would be appreciated.

You bring up a good point that I didn't think of in my previous posts. My idle is at 950 with my cam, and I only see a 0.5 drop in voltage, which is very trivial. I haven't noticed any issues with accessories. The added benefit is your accessories last longer as well since the belt is turning them less.

navyblueSS · 01-19-2012, 12:07 PM

Quote:

Originally Posted by Parag

A bitch to install, and chance of dead battery. Not recommended by me

I have 2 cars with an underdrive pulley and neither one have voltage issues. The install is not bad either as long as you have the right tools for the job.

newmoon · 01-19-2012, 01:03 PM

Putting one on mine very soon. 5-10 rwhp is what I am hoping for.

mikeSS · 01-19-2012, 02:19 PM

i am really into the little things to add HP so i didn't add one.

Smirnoff · 01-19-2012, 02:23 PM

Increased my tire pressure for another 5HP.....very easy!

xXSilencerXx · 01-19-2012, 02:46 PM

Not worth it IMO, I have better places to spend the money.

Quote:

Originally Posted by Smirnoff

Increased my tire pressure for another 5HP.....very easy!

SUX2BU · 01-19-2012, 02:55 PM

I have one on every car I have owned. Definitely worth it. Made my 98 SS go 11.0 @ 122 with just bolt ons. Made my 11 Vert go 12.3 @ 113 with just bolt ons and I am also running a tiny 15 lb battery with no voltage issues.

PAUL SS · 01-19-2012, 03:07 PM

Quote:

Originally Posted by Parag

A bitch to install, and chance of dead battery. Not recommended by me

I wouldn't think keeping the battery charged would be an issue unless you aren't moving and just idleing a lot.

AG454 · 01-19-2012, 05:56 PM

Quote:

Originally Posted by SSDan

I have this same question and could use some more input. In two weeks I'm having a cam and bolt-on package done. So, I will pay no extra labor for the pulley install since the OEM pulley has to come off anyway. I hear pros about this pullyey such as it's cheap HP (5 - 8 HP for $200 -250). And the risks of a dead battery are oversated since a cammed car will have a higher idle speed anyway and that offsets the lower accessory rpms from the UD pulley. I dunno? I live in SC and the heat is tough on batteries anyway plus I certainly don't want any A/C performance issues. Folks who have a UD pulley on a cammed car - what has been your experience? Would you do it again or not and why? Any feedback would be appreciated.

Since you are doing a cam swap, it is a no-brainer. Do it. Your cam install will necessitate a idle increase which will negate the voltage drop at idle. I did not notice any effect on my AC.

01-19-2012, 08:37 AM	#1
djxrated81 Drives: 2011 camaro SS/RS Join Date: Nov 2011 Location: Toms River, NJ Posts: 404	underdrive pulley worth it? SLP's underdrive pulley is it worth getting, do You need anything else to go with it etc... __________________ 2011 2SS/RS Airaid cai, ARH HF cats X pipe, SLP LM1, 160stat,RX Catch can, Tuned @ Tune Time Performance, side marker black outs, decepticon bowtie emblems, stealth turn sig. bulbs,Hyper White DTRL Painted GFX, Havoc Spoiler [IMG]

01-19-2012, 10:34 AM	#3
djxrated81 Drives: 2011 camaro SS/RS Join Date: Nov 2011 Location: Toms River, NJ Posts: 404	K thanks __________________ 2011 2SS/RS Airaid cai, ARH HF cats X pipe, SLP LM1, 160stat,RX Catch can, Tuned @ Tune Time Performance, side marker black outs, decepticon bowtie emblems, stealth turn sig. bulbs,Hyper White DTRL Painted GFX, Havoc Spoiler [IMG]

01-19-2012, 01:03 PM	#8
newmoon Drives: 2019 GT350 Join Date: Jan 2011 Location: NC Posts: 3,232	Putting one on mine very soon. 5-10 rwhp is what I am hoping for. __________________ 2019 GT350 RR 2013 Boss Mustang 2012 SRT Challenger 392 auto 12:40s 112 stock 2012 Ford Mustang 5.0. Brembo, 3:73s 2010 SS, LS3, Cammed, LTs, 12:20s 2004 Redfire Cobra, Pullied & Tuned 1986 GT, Ed Curtis 347ci, 11:20s motor. 10:30s 100-hp shot Last edited by newmoon; 01-19-2012 at 02:31 PM.

01-19-2012, 02:23 PM	#10
Smirnoff Drives: Camaro SS Join Date: Mar 2010 Location: Motorcity Dragway Posts: 978	Pass Increased my tire pressure for another 5HP.....very easy! __________________ 11.90's w/headers, CAI, custom tune, slicks/skinnys, shifter & 100+ Ethyl.

01-19-2012, 02:55 PM	#12
SUX2BU Quit being a pu$$y Drives: FAST Join Date: Jan 2011 Location: Sachse TX (DFW) Posts: 5,825 View My Garage	I have one on every car I have owned. Definitely worth it. Made my 98 SS go 11.0 @ 122 with just bolt ons. Made my 11 Vert go 12.3 @ 113 with just bolt ons and I am also running a tiny 15 lb battery with no voltage issues. __________________ <----- Click HERE to see ALL of my mods/write ups

01-19-2012, 10:32 AM	#2
Parag Drives: 2010 camaro 2SS LS3 Join Date: Aug 2011 Location: Denver Posts: 1,334	A bitch to install, and chance of dead battery. Not recommended by me

01-19-2012, 11:21 AM	#4
SSDan Drives: 2016 1SS 6MT NPP Join Date: Feb 2010 Location: Lake Murray, SC Posts: 2,245 View My Garage	I have this same question and could use some more input. In two weeks I'm having a cam and bolt-on package done. So, I will pay no extra labor for the pulley install since the OEM pulley has to come off anyway. I hear pros about this pullyey such as it's cheap HP (5 - 8 HP for $200 -250). And the risks of a dead battery are oversated since a cammed car will have a higher idle speed anyway and that offsets the lower accessory rpms from the UD pulley. I dunno? I live in SC and the heat is tough on batteries anyway plus I certainly don't want any A/C performance issues. Folks who have a UD pulley on a cammed car - what has been your experience? Would you do it again or not and why? Any feedback would be appreciated.

01-19-2012, 02:19 PM	#9
mikeSS Drives: 2015 c7 Join Date: Nov 2009 Location: MI Posts: 7,462	i am really into the little things to add HP so i didn't add one.

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