BTR Gen III & IV LS Truck Cam - Stage 2 - V3 - BTR-LSTRUCKSTG2-V3
Specs: 208/21X, .549"/.549", 108.5° LSA
Intake Lobe Lift @ TDC: 0.0444”
Overview
The BTR V3 Truck Camshaft Series represents the most extensive truck cam development program BTR has ever undertaken. The Stage 2 V3 cam delivers a strong balance of midrange torque and horsepower under the curve — perfect for trucks that tow or need extra punch without sacrificing drivability.
BTR utilized advanced valvetrain simulation, dynamic modeling, and Spintron testing on both cathedral and square-port heads to ensure valvetrain stability and reliability across all LS truck applications.
Each camshaft was extensively validated on both engine and chassis dynos, using full-length single and dual exhaust systems, OEM-style intakes, and real-time in-cylinder combustion monitoring. Hundreds of dyno sessions were performed to optimize cam timing, overlap, and scavenging — maximizing torque and efficiency across the usable RPM range.
These cams are not rehashed catalog lobes — they’re clean-sheet designs built with race-level engineering rigor, advanced lobe development, and combustion modeling normally reserved for motorsport programs. Proudly designed and manufactured in the USA.
Specifications
BTR SKU: BTR-LSTRUCKSTG2-V3
Camshaft Description: BTR LS Truck V3 Stage 2
Engine Family: Gen III & IV LS Applications
Recommended Engine Size: 4.8L – 6.2L
Recommended Valve Springs: BTR-SK018 or SP011-16*
Note: For 6.0L or 6.2L engines with square-port heads, use the BTR-SK018 spring kit.
Recommended Lifters & Trays: (LS7 Lifters) X12499225, (Trays) BTR95365-4
Suggested Pushrod Length: 7.400”
Camshaft Data
| Specification | Value |
|---|---|
| Intake Duration @ .050" | 208° |
| Exhaust Duration @ .050" | 21X° |
| Lobe Lift (Intake / Exhaust) | 0.323" / 0.323" |
| Intake Lift @ TDC | 0.0444" |
| Rocker Arm Ratio | 1.7:1 |
| Net Valve Lift (Intake / Exhaust) | 0.549" / 0.549" |
| Lobe Separation Angle | 108.5° |
| Idle Vacuum @ 750 RPM | 42 kPa |
| RPM Operating Range | 1300–6250 |
| Idle Quality | Noticeable mild cam sound — clearly not stock |
| Chop Scale | 4/10 |
| Expected Gains (Peak-to-Peak) | +53 HP / +16 lb-ft |
| Torque Converter Compatibility | Works with OE converters |
| Drivability | Mild — daily-driver friendly |
Dyno Testing Configuration
Testing was performed using 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 2 V3 Truck Cam vs OEM 5.3L Truck Cam
| Metric | Gain | % Gain |
|---|---|---|
| Horsepower (Peak-to-Peak) | +52.5 HP | +14.0% |
| Torque (Peak-to-Peak) | +24.4 lb-ft | +6.2% |
| Average Horsepower | +11.8 HP | +4.8% |
| Average Torque | +16.0 lb-ft | +4.3% |
| RPM Range (Average) | 1900–5000 RPM |
BTR Stage 2 V3 Truck Cam vs BTR Stage 2 V2 Truck Cam (BTR-31218110)
| Metric | Gain | % Gain |
|---|---|---|
| Horsepower (Peak-to-Peak) | 0 HP | 0% |
| Torque (Peak-to-Peak) | +8.8 lb-ft | +2.1% |
| Average Horsepower | +7.7 HP | +3.1% |
| Average Torque | +12.0 lb-ft | +3.2% |
| RPM Range (Average) | 1900–5000 RPM |
