Understanding the Comp Cams Stage 2 Camshaft

The Comp Cams Stage 2 camshaft is a popular upgrade among performance enthusiasts seeking a noticeable power increase while maintaining reasonable daily drivability. This cam delivers a more aggressive lobe profile compared to a stock or Stage 1 cam, offering increased lift and duration that improve airflow through the engine. It is designed for a broad range of applications, including LS-based engines, small-block Chevys, and modern Ford modular engines, making it a versatile choice for muscle cars, trucks, and street performance builds.

Unlike full-race cams that sacrifice low-end torque and idling smoothness, the Stage 2 cam strikes a balance that works well with common modifications like cold air intakes, headers, and aftermarket exhaust systems. It pairs nicely with stock cylinder heads and intakes in many cases, though pairing it with mild head porting or a performance intake manifold can unlock even more potential. The camshaft itself is precision-ground from hardened steel and includes appropriate lobe profiles to minimise valvetrain wear when used with matching valve springs.

Key Features

  • Increased lift: Typical intake lift of 0.550‑0.600 inches and exhaust lift of 0.550‑0.600 inches (depending on engine family) for greater valve opening area.
  • Extended duration: Duration at 0.050 inch lift often ranges from 220° to 240°, allowing more time for air/fuel mixture to enter the cylinder.
  • Lobe separation angle (LSA): Usually 112° to 114°, which helps maintain good idle quality and vacuum for power brakes and accessories.
  • Compatibility: Works with stock ECM tuning with a custom tune, though a professional calibration is highly recommended to fully realise gains and avoid lean conditions.

Performance Boosts from Installation

Swapping in a Comp Cams Stage 2 camshaft can transform your engine’s personality. The most noticeable changes come in the mid‑range and top‑end power bands. Real‑world dyno tests on LS3 engines show gains of 25–40 horsepower at the wheels, with similar increases in torque peaking around 4,500–5,500 RPM. For older small‑block Chevys, gains of 20–30 horsepower are common, especially when the cam is matched with a higher‑stall torque converter in automatic transmissions.

Beyond peak numbers, the power curve shifts upward. The engine builds power more aggressively from 3,000 RPM onward, making highway passing and track pulls feel much stronger. Throttle response sharpens noticeably because the cam helps the engine breathe more freely at higher RPM. Drivers often report a more aggressive idle quality with a distinct lopey sound, which many enthusiasts appreciate for its performance character.

It is important to note that the Stage 2 cam’s increased overlap can reduce manifold vacuum slightly, which may affect power brakes on some vehicles. In most cases, aftermarket vacuum pumps or canisters can resolve this. Also, the cam’s duration increase means the engine may prefer a slightly higher idle speed (800–900 RPM) to remain stable.

Typical Dyno Results (LS3 example, with headers & intake)

  • Stock: 430 hp / 410 lb-ft (at the crank)
  • With Comp Stage 2 cam + tune: 470 hp / 440 lb-ft (at the crank)
  • Gains: +40 hp / +30 lb-ft

These numbers will vary based on engine condition, supporting mods, and the precision of the tune. A Comp Cams official product page provides specific specs for each application.

Cost Breakdown of Installation

Understanding the total investment is crucial before committing to a cam swap. Below is a realistic breakdown based on a typical V8 installation at a reputable performance shop. Costs can vary by region and vehicle complexity.

Parts Costs

  • Comp Cams Stage 2 Camshaft: $350 – $550 (depending on engine family and retailer).
  • Valve springs (recommended upgrade): $150 – $300 for a set of 16 matched springs.
  • Pushrods: $80 – $150 for hardened pushrods (length may need measuring).
  • Lifters (new recommended): $150 – $300 for a set (hydraulic roller lifters).
  • Gasket set (intake, valve cover, timing cover): $60 – $120.
  • Timing chain/oil pump (optional but wise with higher lift): $100 – $250.
  • Coolant and oil: $50 – $80.

Labor Costs

  • Professional installation: $600 – $1,000 (more for DOHC or transverse engines).
  • Machine work (if head removal needed for spring replacement): $200 – $400 (if shimming or seat cutting is required).
  • ECU tuning (dyno or street tune): $400 – $700 (essential for driveability and safety).

Estimated Total Range

Adding parts, labor, and tuning, the total cost typically falls between $1,600 and $2,500. For a do-it-yourself installer who already owns tools and can do the tune themselves, the cost can drop to around $800–$1,200. Always budget a 10–15% contingency for unforeseen items like broken bolts or additional gaskets.

For reference, Summit Racing and JEGS both carry Comp Cams products and frequently offer competitive pricing. Tuning services from specialists like HP Tuners dealerships can often be found locally.

Installation Process Overview

While a full DIY guide is beyond the scope of this article, understanding the major steps helps set expectations for time and difficulty. A cam swap is an intermediate-to-advanced project requiring several days if you are working alone in a home garage. Expect to spend 8–15 hours for a pushrod engine.

Major Steps

  1. Prepare the vehicle: Disconnect the battery, drain coolant and engine oil, and remove the radiator fan, shroud, and accessory drive components (alternator, power steering pump, A/C compressor).
  2. Remove intake manifold and valve covers: On pushrod engines, the intake must come off to access the lifters.
  3. Remove the harmonic balancer and timing cover: Use a proper puller and mark the timing chain position relative to the cam and crank sprockets.
  4. Remove the stock camshaft: Unbolt the cam retainer plate (if equipped) and carefully slide the cam out toward the front of the engine. Avoid scratching main bearing journals.
  5. Install new lifters and pushrods: Apply assembly lube to lifter faces and cam lobes. If reusing lifters, keep them in order; new lifters are always preferred.
  6. Install new camshaft: Lubricate cam bearings and journals, slide in the new Comp Stage 2 cam, and secure the retainer plate. Install the timing chain set with proper indexing (usually dot-to-dot or cam keyway alignment).
  7. Install new valve springs (if upgrading): Remove cylinder heads or use an on-engine spring compressor to swap springs. Verify installed height and seat pressure.
  8. Reassemble: Reinstall timing cover, balancer, intake manifold, valve covers, and accessories. Torque all fasteners to spec.
  9. Refill fluids: Add fresh coolant and engine oil (high-zinc break-in oil recommended).
  10. Initial start and break-in: Prime the oil system (remove distributor or fuel pump drive if needed) to ensure lifters fill with oil. Start the engine and let it idle at 2,000–2,500 RPM for 20 minutes to break in the cam lobe/lifter interface. Then change oil and filter.

Professional installation is recommended unless you have experience with engine internal work. Mistakes during cam break-in can instantly destroy the lobes.

Tuning and ECU Considerations

A Comp Stage 2 camshaft changes the engine’s air/fuel ratio, idle speed, and timing requirements. Running the stock calibration will likely result in a rough idle, poor throttle response, and possible lean conditions at high load. A custom tune via HP Tuners, EFI Live, or SCT software is essential.

Tuners typically adjust idle speed (raise to 800–950 RPM), recalibrate the mass air flow and VE tables, modify spark advance curves, and disable or adjust short-term fuel trims to account for the increased overlap. Some modern GM and Ford vehicles require VATS recalibration to prevent check-engine lights from the cam sensor. The cost of a professional mail-order or dyno tune ranges from $300–$700, but it is the difference between a frustrating driver and a satisfying performance upgrade.

Stage 2 vs. Other Stages

Comp Cams offers several stages that target different power bands and levels of aggression:

  1. Stage 1: Minimal idle change, gains from idle to 5,500 RPM. Good for daily drivers on a budget. Gains of 10–20 hp.
  2. Stage 2 (this cam): Noticeable idle lope, strong mid-to-upper range power (2,500–6,500 RPM). Ideal for street/strip cars with basic bolt-ons.
  3. Stage 3: Aggressive idle, reduced low-end torque, peak power above 4,500 RPM. Requires higher stall converter, more compression, and substantial supporting mods.

If your vehicle retains a stock torque converter (automatic) and you want daily driveability, Stage 2 is the sweet spot. For manual transmission cars, any stage works but Stage 2 offers the best all-around balance.

Conclusion

Installing a Comp Cams Stage 2 camshaft is one of the most rewarding modifications for a naturally aspirated engine. The gains in horsepower and torque, combined with the aggressive sound, justify the investment for many enthusiasts. While the total cost can range from $1,600 to $2,500 when including parts, labor, and tuning, the performance improvement is substantial and long-lasting when the installation is performed correctly. Always pair the cam with quality valve springs, new lifters, and a professional tune to ensure reliability and full performance. For those willing to take on the project, the result is a more powerful, more responsive vehicle that delivers genuine driving excitement.