Uh pulley - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Yellowxwolf · 06-01-2016, 09:01 AM

Any suggestions on UD pulley?

failshift · 06-01-2016, 09:02 AM

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Olddudesrule · 06-01-2016, 09:28 AM

Hey Jarhead! Why do you need to run the UD pulley? Just asking because if you're not going beyond bolt on's, is there really a need? Less coolant circulation, less alternator charging, etc.. If you need on, have you thought about what % underdriven your looking at. I've run up to about 20%-22% on the street with few issues, but really never found it worth the $$ for my applications. Not trying to rain on the thread, just curious as to why you want to run one.

Yellowxwolf · 06-01-2016, 09:01 PM

Why would I stop at bolt-ons? And the pct is the biggest thing that I'm wondering what people have had experience with. And what works best for each application.

JCunningham · 06-02-2016, 12:42 AM

unless your cammed and running 800+ RPM idle you dont need one. Fluidamper or ATI with a stock size pully if wanting a better balancer.

christianchevell · 06-02-2016, 09:16 AM

Yup what J said I run the Fluidampr to counter harmful vibrations the 25% underdrive to the power only is OK because my idle is 950 cammed.... the A/C no under drive I like being cold in the heat, and the effects of Underdrive pulleys greatly exaggerated on a N/A car ....now if it was a pulley change on a supercharged bumping up boost......

Stock we have what is inadequate to even be called a harmonic balancer as the engines internally balanced fair...... and its not meant to deal with the wide vibrations of a cammed engine and have seen them and even a cheaper SLP ones fail over the years in postings. Its just a weighted pulley stock basically. A good Harmonic balancer saves lots of stress to the timing chain, cam bearings, even the main bearings. When I sit at a idle my car rocks..... J's car rocks too...... People know your not stock if they are smart and Love it...Give thumbs up from people, also idiots who need a door adjustment...LOL

Bodywerks · 06-02-2016, 10:28 AM

I'm running a powerbond 25% without issue. Ran it for 6 months on bolt ons no problem. Now, cammed, still no issue.

06-01-2016, 09:01 AM	#1
Yellowxwolf Drives: 2015 Chevrolet camaro 2ss Join Date: May 2016 Location: Jacksonville NC Posts: 14 View My Garage	Uh pulley Any suggestions on UD pulley?

06-01-2016, 09:28 AM	#3
Olddudesrule Resident nomad Drives: 2014 Summit White 1SS/1LE Join Date: Nov 2015 Location: Gilbert, AZ Posts: 1,765	Hey Jarhead! Why do you need to run the UD pulley? Just asking because if you're not going beyond bolt on's, is there really a need? Less coolant circulation, less alternator charging, etc.. If you need on, have you thought about what % underdriven your looking at. I've run up to about 20%-22% on the street with few issues, but really never found it worth the $$ for my applications. Not trying to rain on the thread, just curious as to why you want to run one. __________________ Sold: 2007 Z06 2002 Viper GTS/ACR 2003 Z06 1965 FFR Cobra 2012 Nissan 370Z ADM LSA Stage II, Roto-Fab CAI, Kooks LTH/HFC's, Phastek CC, ported TB, Mishimoto radiator and oil cooler, BC Racing ER Series CO's, JPSS 32mm Black Magic rear bar, JPSS front inserts, R1 Concepts Premier slotted rotors/Goodrich SS lines, Schroth ASM harness, MGW flatstick, Brey-Krause HB, Tuned by NicD, at Cordes Performance Racing.

06-02-2016, 12:42 AM	#5
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,069	unless your cammed and running 800+ RPM idle you dont need one. Fluidamper or ATI with a stock size pully if wanting a better balancer. __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

06-02-2016, 09:16 AM	#6
christianchevell old school chevy rodder Drives: 2021 zl1 a-10 WildCherry Join Date: Jul 2012 Location: Oregon Posts: 5,622 View My Garage	Yup what J said I run the Fluidampr to counter harmful vibrations the 25% underdrive to the power only is OK because my idle is 950 cammed.... the A/C no under drive I like being cold in the heat, and the effects of Underdrive pulleys greatly exaggerated on a N/A car ....now if it was a pulley change on a supercharged bumping up boost...... Stock we have what is inadequate to even be called a harmonic balancer as the engines internally balanced fair...... and its not meant to deal with the wide vibrations of a cammed engine and have seen them and even a cheaper SLP ones fail over the years in postings. Its just a weighted pulley stock basically. A good Harmonic balancer saves lots of stress to the timing chain, cam bearings, even the main bearings. When I sit at a idle my car rocks..... J's car rocks too...... People know your not stock if they are smart and Love it...Give thumbs up from people, also idiots who need a door adjustment...LOL __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data,Red Carbon Interior, Nav, RotoFab Big Gulp , Elite x2ultra, Borla ATAK, Driveshaft shop, BMR susp, Speed covers, intercoolers, ATI , 2650 MAG, DSX lid, 103 NW, TSP Longtubes & cats, LPE, 1le mods, ,LME cover, Katech pump and chain, Trunnions, BTR stage 2, LPE boostapump, Gforce, Speed eng , Granetteli, etc etc

06-02-2016, 10:28 AM	#7
Bodywerks Drives: 2015 2SS/RS/1LE Join Date: Feb 2015 Location: Tucson Posts: 866	I'm running a powerbond 25% without issue. Ran it for 6 months on bolt ons no problem. Now, cammed, still no issue. __________________ 2015 SS/RS/1LE HSA delete, VMAX throttle body, CAI inc. Intake, PRC255 heads, BTR 660 springs, BTR cryo-treated rockers, PAT G 232/240 .654/.626 110+2, johnson 2110's, Manton 502 pushrods, C5R, Melling high volume/high pressure, Powerbond 25% underdrive pulley, Proform covers, Kooks stepped headers, catless mids, Doug Thorley exhaust. 512rwhp, 446rwtq on a mustang dyno, tuned by Cunningham motorsports.

06-01-2016, 09:02 AM	#2
failshift Banned Join Date: Jan 2015 Posts: 1,089	ATI ••••••••••••••••••••••••••••••••••••••••••••• LSX376 SLP TVS2300 '13 1LE Full front half protected by Xpel PPF Instagram:@Failshift 603hp/547tq 1LE Owners Group: https://www.facebook.com/groups/559684050767758/

06-01-2016, 09:01 PM	#4
Yellowxwolf Drives: 2015 Chevrolet camaro 2ss Join Date: May 2016 Location: Jacksonville NC Posts: 14 View My Garage	Why would I stop at bolt-ons? And the pct is the biggest thing that I'm wondering what people have had experience with. And what works best for each application.