GPI LSA / LS9 / LS PD Blower Camshaft - LS SS2 Blower with 8620 Hardened Core Upgrade - SC-STG2-8620
Street/Strip Blower Cam with Premium 8620 Hardened Core
The GPI LS SS2 Blower - 8620 Hardened Core Upgrade is the ideal camshaft for LSA, LS9, and other positive displacement supercharged Gen IV LS engines needing stronger top-end power with enhanced durability. This grind delivers the same street/strip performance as the standard SS2 but incorporates a premium 8620 hardened alloy core designed for improved strength and long-term reliability under blower pressure.
Purpose-built for the 3000+ stall converter crowd, the SS2 rivals the torque of the SS1 but adds roughly 10 - 15 horsepower up top and continues to pull aggressively to around 6700 RPM. With improved valvetrain stability and superior lobe wear resistance from the 8620 upgrade, this cam is perfect for street/strip blower combinations in ZL1, CTS-V, ZR1, and other PD-powered LS vehicles.
High Lift Valvetrain Requirements
As a high lift camshaft, proper supporting hardware is required for safe operation - especially in boosted applications. GPI specifies:
- Dual .660" valve springs
- Hardened pushrods
- AFM / DoD delete
Why Choose the 8620 Hardened Core?
The 8620 core upgrade uses a specialized hardening process that enhances the camshaft's surface durability while preserving the alloy's beneficial ductility. The result is a cam designed for demanding PD blower environments with:
- More durable lobe wear surfaces
- Improved overall material strength
- Superior longevity under higher load and friction
- Enhanced reliability for high-boost and high-mileage builds
For owners looking to push their supercharged setups harder - or simply wanting the most durable option available - the 8620 SS2 is a standout upgrade.
Street/Strip Power with Increased Top-End Gains
Designed for drivers who want more than the SS1 delivers, the SS2 Blower cam offers:
- Torque similar to SS1 with stronger midrange
- Additional 10 - 15 horsepower at the top of the curve
- Stronger pull to ~6700 RPM
- Best performance with a 3000+ stall converter
- Further improvements with increased rear-end gear ratios
Proven GPI Engineering
GPI camshafts have become the go-to choice for blower LS builds across the country. From mild upgrades to all-out race applications, their cam and head packages dominate tracks nationwide. The SS2 sits in the sweet spot between drivability and aggressive performance - now with the added toughness of the 8620 core.
SS2 Blower Cam Specs - SC-STG2-8620
- Duration (Int/Exh): 225 / 243
- Valve Lift (Int/Exh): .637 / .629
- LSA: 119.75
- ICL: +7.75
- RPM Range: Strong to ~6700 RPM
- Converter: 3000+ stall required
- Gear Ratio: Increased ratios recommended
- Core Material: 8620 hardened alloy
Quick Specs
- Application: LSA / LS9 / PD supercharged LS engines
- Duration: 225 / 243
- Lift: .637 / .629
- LSA / ICL: 119.75 / +7.75
- Converter: 3000+ RPM
- RPM Capability: ~6700 RPM
- Valvetrain: Dual .660" springs & hardened pushrods
- AFM/DoD: Delete required
- Core: 8620 hardened upgraded core
Features & Benefits
- Premium 8620 hardened core for superior lobe wear protection
- 10 - 15 more horsepower up top compared to SS1
- Street/strip oriented with strong mid and upper powerband
- Ideal for ZL1, CTS-V, ZR1 and other PD blower LS builds
- Pulls hard to ~6700 RPM with optimal tuning
- Enhanced reliability for high-boost applications
FAQs
Is the 8620 core upgrade necessary for a blower cam?
While not mandatory, the 8620 hardened core delivers superior durability, especially in high-boost or high-mileage builds. It offers better lobe wear protection and long-term reliability.
What supporting mods do I need for the SS2 Blower cam?
This high lift cam requires dual .660" valve springs, hardened pushrods, and an AFM/DoD delete. A 3000+ stall converter and upgraded rear gear ratio are also recommended.
Why Buy from Beefcake Racing?
Beefcake Racing specializes in LSA, LS9, and supercharged LS performance, offering expert guidance and fast shipping. Whether you're selecting between SS cam stages or building a complete blower package, our team is here to help maximize your setup.
Call 1-855-827-7223 or email sales@beefcakeracing.com.
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