LS3 powerbond pulley question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

The_bald_eagle_machine · 11-24-2021, 05:18 PM

Hello everyone,

Looking to replace my stock LS3 wobbling harmonic "balancer". Car is stock besides CAI and soon to have full headers, exhaust setup. Car is a 2ss/rs. Looking at the powerbond pulley simply because, if I am taking parts off why not spend a little extra $$$ and upgrade?

My question is this. I was thinking of using a powerbond 25% underdrive pulley vs stock. I noticed the powerbond pulley is keyed. Obviously my stock ls3 crank is not keyed. Does that matter?

Second question. Is a 25% underdrive worth doing on a stock motor? I've heard some guys complaining of voltage issues with the underdrive pulleys. Should I just change out the pulley for a stock balancer and be done with it?

Any input is appreciated.

Bo White · 11-24-2021, 06:50 PM

You will spin the accessories 25% slower which comes in handy since most cammed tunes raise the idle rpm about that amount. Stock rpm may cause voltage quirks at night in low rpm/idle driving.

zz430camaro · 11-25-2021, 03:57 PM

it is keyed if you need it for superchared stuff but you dont need the key.

11-24-2021, 05:18 PM	#1
The_bald_eagle_machine Anthony S Drives: 2011 chevrolet camaro 2ss/rs Join Date: Apr 2021 Location: Chiefland, FL Posts: 842	LS3 powerbond pulley question Hello everyone, Looking to replace my stock LS3 wobbling harmonic "balancer". Car is stock besides CAI and soon to have full headers, exhaust setup. Car is a 2ss/rs. Looking at the powerbond pulley simply because, if I am taking parts off why not spend a little extra $$$ and upgrade? My question is this. I was thinking of using a powerbond 25% underdrive pulley vs stock. I noticed the powerbond pulley is keyed. Obviously my stock ls3 crank is not keyed. Does that matter? Second question. Is a 25% underdrive worth doing on a stock motor? I've heard some guys complaining of voltage issues with the underdrive pulleys. Should I just change out the pulley for a stock balancer and be done with it? Any input is appreciated. __________________ Follow me on instagram @The_bald_eagle_machine https://www.camaro5.com/forums/showthread.php?t=600181 Mods: Texas Speed 2 inch headers, high flow cats, and X-pipe. Custom mid-pipe, Borla Xr1 mufflers. Torqstorm Supercharger, 3.1" pulley, ZL1 fuel pump. MGW Shifter, Mcleod RST clutch, Tick master cylinder and Tick Billet bushing reinforced slave cylinder. DSS One-piece 3.5" Driveshaft, Metco Driveshaft safety loop, BCRacing Coilovers. BMR Poly Diff bushings, Poly Rear cradle bushings, Sub-frame connectors, Lower control arms, camber arms, and toe links.

11-24-2021, 06:50 PM	#2
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	You will spin the accessories 25% slower which comes in handy since most cammed tunes raise the idle rpm about that amount. Stock rpm may cause voltage quirks at night in low rpm/idle driving. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

11-25-2021, 03:57 PM	#3
zz430camaro Drives: 2015 1LE Join Date: Oct 2015 Location: Cleveland, OH Posts: 1,485	it is keyed if you need it for superchared stuff but you dont need the key. __________________ 2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ