The BTR Stage 4 Turbo Camshaft V2 (BTR-TURBOSTG4) is a hydraulic roller camshaft engineered for GM LS-Series engines running serious turbocharged combinations. It is designed for stock-stroke applications spinning past 8000 RPM with supporting valvetrain components, and also suits roughly 408 cubic-inch combinations operating in the 6400-6800 RPM range. Paired with an S400-frame turbo (or similar), this camshaft is regarded as the largest offering in BTR's turbo camshaft lineup.
- Part Number: BTR-TURBOSTG4
- Application: GM LS-Series (turbocharged)
- Camshaft Style: Hydraulic Roller
- Intake Duration @ .050": 227°
- Lobe Separation Angle (LSA): 115°
FAQ
What engines is the BTR Stage 4 Turbo Camshaft V2 designed for?
It is designed for GM LS-Series engines running serious turbocharged combinations, including stock-stroke builds spinning past 8000 RPM and roughly 408 cubic-inch combinations in the 6400-6800 RPM range.
What are the lift, duration, and LSA specs?
The BTR-TURBOSTG4 camshaft has 0.618 in of intake and exhaust lift, 227 degrees of intake duration at .050 inch, and a 115-degree lobe separation angle.
What size turbo works well with this camshaft?
BTR pairs this camshaft with an S400-frame turbo or a similarly sized turbocharger for its intended power range.
Where does this camshaft rank in BTR's turbo lineup?
The Stage 4 is the largest camshaft in BTR's turbo cam lineup, designed for the highest-effort turbocharged applications.
What testing validated this camshaft?
It was Spintron tested in-house to help optimize the power curve while maintaining valvetrain stability and durability.
