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01-24-2020, 01:53 AM
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#1 |
 Drives: Camaro ZL1 Join Date: Apr 2019
Location: London, UK
Posts: 304
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Definitive belt size for 9.17" lower?
Hi all
Need a bit of help! Car goes into the Shop on Monday and I've just received my Super Damper and 15% OD Pulley ( 916227). The belt I received as part of the package is a K080842HD The research I've done says most people use the 845HD or even the 845RPM. Has anyone used the 842 or will it be too tight? If I go 845, is it worth getting the RPM variant? Many thanks and any help appreciated if I need to order something today and express ship across the Pond!
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Made in the USA. Refined in Great Britain - insta: zl1uk
 Velossa intake, Rotofab, Mamo TB, Custom ported NX Lid & Jokerz Full tilt ported LT4 charger, 3 port CoolingMist Meth injection - ATI 15% lower pulley, E2X CC, TSP ceramic coated longtubes, de-cat and Borla 60608 to NPP box, JRE tune, BMR rear control & trailing arms, lock-out kit, lowering springs and front strut brace, Custom carbon trim interior, Xpel ultimate front PPF and Prestige window tint with Chameleon Windscreen tint...ever evolving... |
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01-24-2020, 06:24 AM
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#2 |
Drives: 2018 ZL1 1LE - HBM, PDR Join Date: Jun 2017
Location: Rescue, CA
Posts: 324
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I would recommend the 845HD belt for the 9.17 lower.
You might read through this post regarding my experience with the 842 and the 845 as well as the RPM vs the HD belts. Analysis is not scientific but the results speak for themselves. You might be OK with the 842 in the HD variant. And you might be OK with the RPM in the 845 variant but not the 842RPM variant. https://www.camaro6.com/forums/showthread.php?t=523261
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JRE Tuned (HPTuners) | 15% OD (9.17" crank pulley) | TVS2300 Maggie Heartbeat Supercharger - 14 psi | E-50 (DSX Flex Fuel kit) | JMS FuelMax Fuel Pump Booster | LPE Big Bore High Volume DI fuel pump | LPE High Flow DI fuel injectors | LT5 95mm TB | RotoFab CAI | AEM X-Series OBD2 wide band gauge | Elite Engineering E2-X catch can | Borla S-type NPP Cat-Back 3" exhaust | Forgeline GTD1 5-lug Satin Graphite | SunTek wrap | C-Quartz Finest Reserve ceramic coated
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01-24-2020, 06:49 AM
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#3 |
Drives: 2023 ZL1 M6 Join Date: Sep 2018
Location: Pace FL
Posts: 417
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Don’t use the rpm belt. I broke one and most people have went back to the hd belt.
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2024 Riverside Blue ZL1 M6
Magnuson 2650R, NW 103, Roto Fab Big Gulp, Jet Hot Coated ARH 2 inch LT's, Stainless Works NPP, Too High PSI Billet Valve Covers, Mighty Mouse Wild CC Signature Forged 20x10.5/20x11.5, 295/30-315/30, BMR springs, BMR Cradle lockout, AAD Billet Control/Trailing arms 2023 Vivid Orange ZL1 M6 - sold 2019 Riverside Blue ZL1 A10 - sold |
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01-24-2020, 07:07 AM
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#4 |
  
Drives: 2017 ZL1 Join Date: Jan 2017
Location: NJ
Posts: 905
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I'd stick with the Gates HD Micro-V Belts. I've got the same balancer but maggy 2300 on the other end, no issues.
When you get it on look where you tensioner lands. Make sure it won't bottom out to the left or is so far right you don't have enough tension. Here is my K080859HD with 9.17" and 3" upper on my 2300. This is a little left of center and is prior to first start so it will likely land in the center.
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2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)
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01-24-2020, 08:15 AM
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#5 | |
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Drives: Camaro ZL1 Join Date: Apr 2019
Location: London, UK
Posts: 304
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Quote:
__________________
Made in the USA. Refined in Great Britain - insta: zl1uk
Velossa intake, Rotofab, Mamo TB, Custom ported NX Lid & Jokerz Full tilt ported LT4 charger, 3 port CoolingMist Meth injection - ATI 15% lower pulley, E2X CC, TSP ceramic coated longtubes, de-cat and Borla 60608 to NPP box, JRE tune, BMR rear control & trailing arms, lock-out kit, lowering springs and front strut brace, Custom carbon trim interior, Xpel ultimate front PPF and Prestige window tint with Chameleon Windscreen tint...ever evolving... |
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01-24-2020, 01:22 PM
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#6 |
 Drives: 2018 Zl1 Join Date: Dec 2019
Location: Ontario
Posts: 20
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845HD on mine with a 9.17 lower
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