BTR Gen III & IV LS Truck Cam – Stage 3 – V3 – BTR-LSTRUCKSTG3-V3
Specs: 213/22X, .549"/.549", 109° LSA
Intake Lobe Lift @ TDC: 0.0502”
⚠️ Notice: Stage 3 & 4 V3 Truck Cams require the BTR-SK018 spring kit (or equivalent) and one-piece chromoly pushrods.
Overview
The BTR V3 Truck Camshaft Series represents the most comprehensive camshaft development program in BTR history.
The Stage 3 V3 builds on the proven Stage 2 foundation with added top-end power while maintaining strong low-end torque and drivability — ideal for performance-minded truck owners seeking a serious upgrade that still behaves on the street.
Developed using advanced valvetrain simulation, dynamic modeling, and Spintron testing across both cathedral and square-port heads, these cams guarantee valvetrain stability and precision across all LS truck configurations.
Each profile undergoes extensive engine and chassis dyno validation, utilizing OEM-style intakes, full-length exhaust systems, and real-time in-cylinder combustion monitoring. This level of testing ensures optimized cam timing, overlap, and scavenging for maximum torque and horsepower throughout the usable powerband.
This isn’t a recycled catalog cam — it’s a clean-sheet motorsport-engineered design, bringing race-level analytical precision to the street. Proudly designed and manufactured in the USA.
Specifications
BTR SKU: BTR-LSTRUCKSTG3-V3
Camshaft Description: BTR LS Truck V3 Stage 3
Engine Family: Gen III & IV LS Applications
Recommended Engine Size: 4.8 – 6.2 L
Recommended Valve Springs: BTR-SK018 (required)
Recommended Lifters & Trays: (LS7 Lifters) X12499225 | (Trays) BTR95365-4
Suggested Pushrod Length: 7.400”
Camshaft Data
| Specification | Value |
|---|---|
| Intake Duration @ .050" | 213° |
| Exhaust Duration @ .050" | 22X° |
| Lobe Lift (Intake / Exhaust) | 0.323" / 0.323" |
| Intake Lift @ TDC | 0.0502" |
| Rocker Arm Ratio | 1.7:1 |
| Net Lift (Intake / Exhaust) | 0.549" / 0.549" |
| Lobe Separation Angle | 109° |
| Idle Vacuum @ 750 RPM | 42 kPa |
| RPM Operating Range | 1900 – 6400 |
| Idle Quality | Deep lope similar to Truck Norris |
| Chop Scale | 6 / 10 |
| Expected Cam Swap Gains (P2P) | +64 HP / +27 lb-ft |
| Torque Converter Compatibility | Works with OE converter (tuning recommended) – aftermarket converter for best results |
| Drivability | Near OE torque below 2500 RPM, broader powerband – great for a hot daily driver |
| Engineering Notes | Engineering’s top pick for best all-around truck cam |
Dyno Testing Configuration
Testing was conducted on a stock Gen IV 5.3L short block with stock 243 heads, BTR98544 head gaskets, TBSS intake, Silverado headers, Speed Engineering NNBS Y-pipe, and a full-length 3.5” single exhaust with muffler.
Comparing Cams
BTR Stage 3 V3 Truck Cam vs OEM 5.3L Truck Cam
| Metric | Gain | % Gain |
|---|---|---|
| Horsepower (Peak-to-Peak) | +63.3 HP | +17.0 % |
| Torque (Peak-to-Peak) | +26.3 lb-ft | +6.7 % |
| Average Horsepower | +21.2 HP | +7.6 % |
| Average Torque | +22.4 lb-ft | +6.1 % |
| RPM Range (Average) | 2000 – 6000 RPM |
BTR Stage 3 V3 Truck Cam vs BTR Stage 3 V2 Truck Cam (BTR-31824100)
| Metric | Gain | % Gain |
|---|---|---|
| Horsepower (Peak-to-Peak) | +6.0 HP | +1.4 % |
| Torque (Peak-to-Peak) | +15.4 lb-ft | +3.8 % |
| Average Horsepower | +11.1 HP | +3.8 % |
| Average Torque | +15.4 lb-ft | +4.2 % |
| RPM Range (Average) | 2000 – 6000 RPM |
