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05-13-2025, 06:58 PM
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#1 |
 Drives: 2018 SS / 2021 ZL1 Join Date: Jul 2020
Location: Lima, ny
Posts: 50
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NPP
So. Admit an old topic but I want to make sure I don’t f nothing up 😂
Have a 2018 SS with borla which sounds mint. Just picked up a 2021 zl1 with NPP but want to get used to the car before I decide what to do to it but it does need to sound as good as it can. What can I do? Set it to tour ? Should I pull the fuse for the valves? I want it loud and don’t care about neighbors but don’t want to f up the car with back pressure or anything? Advice while I get used to the car and decide what I want to do to it my friends? Thanks. |
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05-13-2025, 07:29 PM
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#2 |
            
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 13,476
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You can pull fuse 51 in the engine bay fuse block to keep the valves open 100% of the time. Back pressure issues are a myth (stealth mode is known to cause rear bumper/diffuser trouble on the track, but you're going in the opposite direction).
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle Terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
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05-14-2025, 08:55 AM
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#3 |
 Drives: 2019 Camaro 1SS1LE Join Date: Jan 2024
Location: Utah
Posts: 370
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As long as you don't run chambered flowmasters, back pressure shouldn't be an issue. Your choice on flavor of sound.
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2019 1SS1LE M6 Shadow Gray Metallic
ProCharger D1X Race Kit - 4.25" Pulley || GPI Pistons/Rods - ACL Bearings - ARP Hardware || LME Timing Chain Guide || Katech C5R Timing Chain || Katech OE Spec Billet Oil Pump || OE Ported Heads || CHE Trunnion Upgrade || BTR 220 Cam - BTR .660" Dual Springs - GM Racing "Caddy" Lifters - BTR 3/8" Pushrods (7.825") || ATI Balancer || LT4 Injectors || LT4 HPFP || JMS BAP || DSX Flex Fuel || LT2 Intake Manifold || LTH (Catless) || Stainless Works Redline Series NPP || 91 + 8oz Boostane 7/26/2024 Tuning in progress |
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