Unlock 30+ Horsepower: Installing a Crower Camshaft on a Budget

Few modifications deliver the same bang-for-buck as a camshaft swap. With a carefully selected Crower camshaft, you can unlock 30 or more horsepower without spending a fortune. But getting those gains isn’t just about bolting on the part—it requires proper selection, meticulous installation, and thoughtful tuning. This guide walks you through every key step to ensure your Crower camshaft delivers reliable, measurable power increases on a budget.

Understanding Crower Camshafts & How They Make Power

Crower has been a respected name in performance camshafts since the 1950s. Their camshafts are CNC-ground from high-quality billets or castings, engineered to optimize valve timing, lift, and duration for specific engine families (small-block Chevy, Ford modular, LS, etc.). The fundamental principle is simple: by controlling when the intake and exhaust valves open and close, you alter the engine’s volumetric efficiency, moving the power band to a higher RPM range where more air and fuel can be burned.

For typical small-block V8s and modern pushrod engines, a mild performance cam such as Crower’s “Street Warrior” or “Beast” series can add 25–40 horsepower with corresponding torque gains—often for under $400. The budget-friendly part is that you don’t need forced induction or exotic machining. However, you must respect the interplay of lift, duration, and lobe separation angle (LSA). A cam that’s too aggressive for your compression ratio or cylinder head flow will lead to poor idle, lost low-end torque, and even valve-to-piston interference.

Key Camshaft Specs to Understand

  • Duration (advised @ .050” lift): Determines how long the valve stays open. Higher duration shifts power up the RPM scale.
  • Lift (valve lift at the lobe): Governs how far the valve opens. More lift improves airflow but stresses springs and requires higher rocker ratios.
  • Lobe Separation Angle (LSA): Affects idle quality, vacuum, and power band overlap. Tighter LSA (110–112°) – more top-end, rougher idle; wider LSA (114–116°) – smoother idle, better low-end.
  • Valve timing events (IVO, IVC, EVO, EVC): These determine exact opening/closing points relative to piston position. Critical for dynamic compression and overlap scavenging.

Always match your cam selection to your engine’s compression ratio, cylinder head flow, intake/exhaust system, and intended RPM range. Visit the Crower Camshaft catalog to find grinds tailored to your specific engine.

Preparation: Tools, Parts, and Workspace

Before you turn a single bolt, gather everything you need. A cam swap is a multi-hour job (often 6–12 hours for a first-timer) and stopping mid-install for a missing tool wastes time and money.

Essential Tools

  • Socket set (metric and SAE, 3/8” and 1/2” drive)
  • Torque wrench (capable of 15–120 ft-lb)
  • Dead-blow hammer or brass drift
  • Camshaft installation tool (or long bolt and washers for older engines)
  • Timing chain tensioner tool (if applicable)
  • Dial indicator & degree wheel (for checking cam timing)
  • Valve spring compressor (for pushrod-style builds)
  • Feeler gauges, thread lock, assembly lube
  • Workspace lighting, floor jack & jack stands, engine hoist if removing engine

Parts & Consumables

  • Crower camshaft of correct grind for your engine
  • New lifters, pushrods, valve springs, retainers & locks (mandatory unless cam is very mild and stock parts are new)
  • Timing set (chain, gears, tensioners) – inspect or replace
  • Gaskets & seals (valve cover, intake manifold, timing cover)
  • Engine oil & coolant – quality 10W-30 or 5W-30 with high zinc content for flat-tappet cams
  • Assembly lube (high-pressure moly-based)

Check Summit Racing’s Crower camshaft listings for engine-specific kits that include lifters, springs, and instructions—best value for budget builds.

Step-by-Step Installation: The Right Way

1. Disconnect & Drain

Begin by disconnecting the negative battery terminal. Drain engine oil and coolant into approved containers. Remove the air intake, radiator (if needed for access), and fan shroud. For most V8s, you can leave the engine in the vehicle. Support the engine if you’re removing the front timing cover.

2. Remove the Old Camshaft

  • Remove valve covers, rocker arms, and pushrods (mark their locations if reusing).
  • Unbolt intake manifold, distributor (if equipped), and timing chain cover.
  • Remove the timing chain and gears. On overhead-cam engines, remove timing belt or chain with tensioner.
  • Remove the camshaft retaining plate or bolt, then carefully slide the old camshaft out through the front bearing journals. Support the cam to avoid nicking bearings.

3. Inspect & Prep the New Crower Cam

  • Unbox your Crower camshaft and inspect the lobes and journals for any shipping damage. Light surface rust on storage can be polished off with fine emery cloth and oil.
  • Apply liberal amounts of assembly lube to all lobes, distributor drive gear, and each bearing journal. For flat-tappet cams, this step is absolutely critical to prevent lobe wear during the first few minutes of run-in.
  • Check that the cam’s keyway or cam gear bolt pattern matches your crankshaft/cam gear orientation.

4. Install the New Camshaft

  • Gently slide the new Crower camshaft into the block, rotating it to align with the cam bearings. Use a long wooden dowel or cam installation tool to push it in evenly. Never force it.
  • Install the camshaft retaining plate or bolt to factory torque spec (usually 15–25 ft-lb).
  • Install the timing chain set, aligning all timing marks per factory service manual. On engines with variable valve timing, follow manufacturer-specific instructions.
  • Verify crankshaft/camshaft phasing: Rotate the engine two full turns by hand and recheck marks. If you have a degree wheel, check the cam’s intake centerline. Crower provides the lobe centerline spec on the cam card—dial in to within 1° for maximum power.

5. Install Lifters, Pushrods & Rockers

  • If using new lifters, soak them in engine oil for at least 30 minutes before installation. Place them into the bores exactly as they will run (do not swap positions).
  • For hydraulic flat-tappet or roller cams, install pushrods and rocker arms. Adjust preload on hydraulic lifters per Crower’s specs (typically ¼ turn past zero lash for hydraulic rollers, ½–1 turn for flat-tappet).
  • For solid lifters, set hot lash using feeler gauges. Crower cam cards list intake/exhaust hot clearance.

6. Reassemble & Torque

  • Install new timing cover gasket, timing cover, and water pump. Torque bolts in a cross pattern to factory spec.
  • Reinstall intake manifold with new gaskets. Use thread sealant on water jacket bolts (common source of coolant leaks).
  • Attach valve covers, rocker covers, and distributor (set initial timing roughly).
  • Refill engine oil (with high-zinc break-in oil if flat-tappet), coolant. Reconnect battery.

Tuning for the 30 HP Target

Installing the cam is only half the battle. Without proper tuning, you may leave 10–15 horsepower on the table—or risk engine damage from detonation or lean mixtures.

Carbureted Engines

  • Expect to change jetting (richer at high RPM, leaner at idle) and adjust accelerator pump. Larger duration cams often need a higher power valve and larger air bleeds.
  • Set initial ignition timing 10–16° BTDC for most mild cams. Total timing should be around 34–38° at 3000+ RPM, all in by 3000–3500 RPM.

Fuel-Injected Engines (EFI)

  • Use a tunable ECU or aftermarket tuning software (HP Tuners, SCT, etc.) to recalibrate idle air control, fuel tables, and spark advance.
  • Many replacement cams require increasing idle speed to 800–900 RPM and adjusting target idle air counts.
  • Consider a wideband O2 sensor kit for live data monitoring during street tuning.

Dynamic Tuning Break-in Procedure

  1. Prime oil system by cranking with ignition disconnected until oil pressure registers.
  2. Start engine and immediately bring RPM to 2000–2500 RPM. Vary RPM between 2000–3000 for 20 minutes. Do not let it idle during break-in—biggest cause of lobe failure on flat-tappet cams.
  3. After 20 minutes, check valve lash (if adjustable), tighten cylinder head bolts, and check for leaks.
  4. Change oil and filter after break-in (within 20–30 miles). Flat-tappet break-in oil should then be replaced with recommended engine oil.

Common Mistakes That Kill Horsepower (and Engines)

  • Skipping the degreeing process. Even Crower’s precision-ground cams can be a tooth off due to manufacturing tolerances or timing chain stretch. Always check intake centerline.
  • Using old lifters on a new cam. Lifter faces wear-match to the old cam. Reusing them causes rapid lobe failure. Always install new lifters.
  • Insufficient valve-to-piston clearance. High-lift cams require checking piston-to-valve clearance with clay. Minimum 0.080” intake, 0.100” exhaust. If too tight, you need shorter pushrods or fly-cut pistons.
  • Inadequate valve spring pressure. Crower recommends specific spring rates for each cam. Stock springs can’t handle high lift and will cause valve float (power loss and potential valve damage).
  • Skipping oil break-in procedures. Flat-tappet cams are famously sensitive to proper break-in. One moment of low-RPM idle during run-in can wipe a lobe.
  • Not checking pushrod length. After head gasket thickness, milling heads, or using different rockers, pushrod length changes. Use a pushrod length checker to ensure proper rocker geometry.

Budget Considerations: Where to Spend vs. Save

Aim for quality parts where it matters. The cam itself is your biggest performance buy—spend for the correct Crower grind rather than a generic no-name brand. Lifters, timing set, and valve springs should be new and matched to the cam. Save money by:

  • Doing the labor yourself (this guide is all you need).
  • Reusing intake manifold, water pump, and distributor if they are in good condition.
  • Using stock rocker arms (Crower makes bolt-in cams for stock rocker geometry).
  • Using a basic SCT tuner or mail-order tune instead of a full dyno session.

Total cost for a reliable 30+ HP gain: typically $500–$900 (cam kit, springs, gaskets, oil, and a tune). That’s well under $30 per horsepower—a fantastic value.

Final Thoughts: Realize the Gains Safely

A Crower camshaft is one of the most rewarding upgrades a budget-minded enthusiast can make. By carefully selecting the right grind, prepping your engine, following a meticulous installation procedure, and tuning afterward, you can confidently expect 30–40 horsepower at the wheels. Respect the break-in process, use quality assembly lube, and don’t skip the degree wheel—those few extra hours pay off in reliability and peak power. With the tips above, you’re ready to advance your build without breaking the bank.