The TSP Stage 2 Camshaft: A High-Performance Upgrade for Your Chevy 350

If you are looking for a meaningful increase in power from your small-block Chevy 350, a performance camshaft upgrade is one of the most effective modifications you can make. The Texas Speed & Performance (TSP) Stage 2 camshaft has become a popular choice among enthusiasts who want strong mid-range and top-end power without sacrificing every ounce of daily drivability. This cam is designed for street-driven cars and trucks that see regular use at the track or on the open road. In this article, I will break down the power gains you can realistically expect, the total cost of the swap, the installation steps, and the real-world performance results you can count on.

What Is the TSP Stage 2 Camshaft?

The TSP Stage 2 camshaft is a hydraulic roller cam engineered specifically for the Gen I small-block Chevrolet platform. Texas Speed & Performance is well known in the LS and LT communities, but they also offer a solid lineup of camshafts for the older 350ci engines. The Stage 2 grind is intended as a step up from a stock or mild towing cam, offering significantly more lift and duration while still clearing factory-style valve pockets in most pistons.

Key Specifications

  • Lift: Typically around .525-inch intake and .525-inch exhaust (with 1.5:1 rocker arms)
  • Duration at .050: 218 degrees intake and 224 degrees exhaust
  • Lobe Separation Angle: 112 degrees

This grind gives the engine a noticeable lope at idle and shifts the power band upward, with strong torque from 2500 to 6000 RPM. The 112-degree LSA keeps the idle relatively civil while still providing a distinct performance sound. The cam is designed to work with stock-style valve springs, though upgraded springs are strongly recommended for reliable high-RPM operation.

Realistic Power Gains with the TSP Stage 2 Cam

One of the most common questions is how much horsepower and torque this cam actually adds. On a healthy Chevy 350 with a decent set of cylinder heads, intake manifold, and exhaust, you can expect a very respectable increase. The exact numbers depend heavily on your existing engine combination, but here is what most builders see on the dyno.

  • Horsepower gain: 25 to 35 wheel horsepower (depending on supporting mods)
  • Torque gain: 15 to 25 lb-ft, with the peak shifting higher in the RPM range
  • Throttle response: noticeably sharper, especially above 2500 RPM
  • Peak RPM: the engine pulls hard to 6000 RPM, whereas a stock cam runs out of breath around 4800-5000 RPM

It is important to be realistic: if your engine has stock cylinder heads with restrictive valve sizes and a stock intake manifold, the gains will be on the lower end of that range. However, if you have upgraded to aluminum heads, a dual-plane intake like an Edelbrock Performer RPM, and a free-flowing exhaust system, you will see the upper end of the power gains. The cam wants the engine to breathe, so it rewards you for having good airflow upstream and downstream.

For a typical Chevy 350 with a four-barrel carburetor, long-tube headers, and a mild head upgrade, you can expect to land around 350 to 380 horsepower at the flywheel after the cam swap and a proper tune. That is a solid bump over the factory rating of around 210-260 horsepower for a standard 350.

Total Cost of the TSP Stage 2 Cam Swap

Budgeting for a cam swap goes beyond just the camshaft itself. There are several supporting parts that you should replace while you are inside the engine. Cutting corners here can lead to premature wear or even engine damage. Here is a realistic breakdown of the costs involved.

Parts List and Pricing

  • TSP Stage 2 camshaft: $350 to $500 depending on the retailer and any sales
  • Valve springs (upgraded): $80 to $150 for a set of 16
  • Pushrods: $60 to $120 (check length after installation)
  • Lifters (hydraulic roller): $100 to $200 for a quality set
  • Timing chain and gears: $50 to $120 (double-roller recommended)
  • Gaskets and seals: $60 to $100 (valve cover gaskets, intake gaskets, timing cover gasket)
  • Oil pump (optional but recommended): $40 to $80
  • Engine oil and filter: $30 to $50

Total parts cost: approximately $750 to $1,300 depending on brand choices and whether you need upgraded rocker arms. If you are working on a budget, you can save money by reusing your existing rocker arms if they are in good condition, but it is always wise to inspect them closely.

Labor Costs

If you have the tools and mechanical experience, you can tackle this job yourself and save the labor expense. The job requires basic hand tools, a torque wrench, a cam bearing installation tool (or a machine shop to install the cam bearings), and a degree wheel to verify cam timing. Expect to spend a full weekend on the swap if it is your first time.

If you hire a professional shop, labor typically runs between $600 and $1,200 depending on the shop rate and whether they are installing the cam while the engine is in the vehicle or on a stand. An in-chassis cam swap on a Chevy 350 is entirely possible because the front of the engine is easy to access, but it still requires removing the radiator, grille, and accessory brackets on many vehicles. Factor in the added cost of having the shop degree the cam correctly, as this is critical for performance.

Real-World Performance Results and Drivability

Numbers on a dyno sheet are one thing, but how does the truck or car actually drive after the swap? The TSP Stage 2 cam transforms the character of the Chevy 350. The idle is not aggressive enough to be a problem in traffic, but you definitely know it is not stock. You get a steady lope that sounds great without being obnoxious. Cold start behavior is generally good, though you may need to hold the throttle open slightly for the first few seconds until the idle stabilizes.

Street Manners

  • The cam has decent vacuum at idle, typically around 12-14 in-Hg. This is enough to operate power brakes, though the pedal will be slightly firmer than stock. If you have a large vacuum accessory, you may want to add a vacuum canister.
  • Low-speed drivability is acceptable but noticeably less smooth than a stock cam. You will feel a slight surge or stumble below 1800 RPM if the tune is not perfect. This is normal for a cam of this size.
  • Once you are above 2200 RPM, the engine pulls smoothly and strong all the way to 6000 RPM. Passing on the highway requires no downshift, and the car responds instantly to throttle input.

Track Performance

At the drag strip or on a road course, the cam shines. The extended RPM range means you can hold gears longer, and the engine stays in the power band through the shift. Many users report a drop of 0.3 to 0.5 seconds in the quarter-mile after the cam swap alone. On a road course, the ability to pull hard out of corners without falling off the cam is a significant advantage. The wider power band gives you more flexibility in gear selection, which can shave seconds off your lap time.

Detailed Installation Process

Installing a camshaft in a Chevy 350 is a job that a competent DIY mechanic can handle, but it requires patience and attention to detail. Here is a step-by-step overview of the process. Always refer to your specific service manual for torque specs and procedures.

Preparation and Disassembly

  1. Disconnect the battery and drain the coolant and engine oil.
  2. Remove the radiator, fan, and any accessory brackets that block access to the timing cover.
  3. Remove the valve covers, rocker arms, and pushrods. Keep parts organized by cylinder.
  4. Remove the intake manifold and carburetor or throttle body.
  5. Remove the harmonic balancer using a puller tool.
  6. Remove the timing cover and timing chain and gears.
  7. Remove the camshaft retaining plate or thrust button. Carefully slide the old camshaft out of the engine block. Be gentle to avoid damaging the cam bearings.

Camshaft Installation

  1. Lubricate the camshaft lobes and journals with a high-quality camshaft break-in lubricant.
  2. Carefully slide the new TSP Stage 2 camshaft into the block, rotating it slowly to avoid striking the cam bearings.
  3. Install the camshaft retaining plate and torque to spec.
  4. Install a new timing chain and gears. Verify that the timing marks align correctly. Degree the cam to ensure the intake centerline is correct.
  5. Install new lifters, pushrods, and rocker arms. Adjust valve lash according to the cam card specifications.
  6. Install new valve springs (if required) and check for proper spring height and coil bind clearance.
  7. Reinstall the timing cover, harmonic balancer, and all other components in reverse order of removal.

Initial Start-Up and Break-In

  1. Fill the engine with fresh oil and a new filter. Fill with coolant.
  2. Prime the oil system by spinning the oil pump with a drill until oil reaches the rocker arms.
  3. Start the engine and let it idle at a fast idle (around 1500-2000 RPM) for 20 minutes to break in the camshaft and lifters. Monitor oil pressure and temperature closely.
  4. After break-in, perform a full cooling cycle and check for leaks. Retorque the intake manifold and valve covers after the engine has cooled.

If this is your first cam swap, consider having an experienced mechanic or a local machine shop degree the cam for you. Incorrect cam timing can cost you power and cause the engine to run poorly. Texas Speed & Performance provides a cam card with every camshaft that includes the recommended installation specs.

Important Considerations Before You Start

A cam swap is not a standalone modification. The Chevy 350 is a robust platform, but it has some quirks that you need to address for the TSP Stage 2 cam to perform optimally.

Piston-to-Valve Clearance

The lift on this cam is moderate, but if your pistons have very small valve reliefs or you are using aftermarket heads with larger valves, you need to check piston-to-valve clearance. Spin the engine over by hand with clay on the pistons to ensure you have at least 0.080 inches of clearance. If you have zero-deck pistons and a stock head gasket, you should be safe, but it is always better to check.

Fuel System and Tuning

If you are running a carbureted setup, you may need to re-jet the carburetor to account for the increased airflow. The cam will lean out the mixture at high RPM, so richer jets are usually required. For fuel-injected engines, a custom tune is mandatory. The stock ECU calibration will not run well with this cam. You will need a tuner like a Moates OBD1 emulator or a standalone system like a Holley Terminator X.

Exhaust System

The TSP Stage 2 cam benefits from a free-flowing exhaust. Stock manifolds and restrictive catalytic converters will choke the engine and limit your power gains. Long-tube headers and a 2.5-inch or 3-inch exhaust system are strongly recommended. If you still have to pass emissions, consider a high-flow catalytic converter that can handle the increased flow.

Transmission and Rear End

The additional power and RPM range will put more stress on your transmission and differential. If you have a stock TH350 or 700R4, consider upgrading the valve body, torque converter, and shift kit. A higher stall torque converter (around 2500 to 2800 RPM) will help the cam come on the cam sooner and improve launch performance. A 3.73 or 4.10 rear gear is a good match for this cam if you are using a standard transmission.

Supporting Modifications That Maximize Results

To get the most out of the TSP Stage 2 cam, consider pairing it with these complementary upgrades.

  • Aluminum cylinder heads: Vortec-style or aftermarket heads like AFR or Brodix flow significantly more air than stock cast-iron heads.
  • High-flow intake manifold: An Edelbrock Performer RPM or Weiand Stealth matches the cam power band well.
  • Electric fuel pump: If your engine is carbureted and you are making over 350 horsepower, a mechanical pump may not keep up. An Aeromotive or Holley electric pump with a regulator is a reliable upgrade.
  • MSD ignition system: A hotter spark helps burn the air-fuel mixture efficiently, especially at higher RPM. An MSD 6AL box and a quality distributor like a Pro-Billet are excellent choices.

If you want to learn more about selecting the right camshaft for your Chevy 350, Comp Cams has a comprehensive cam selection guide that explains the relationship between duration, lift, and lobe separation angle. It is a great resource for understanding how the TSP Stage 2 fits into the larger picture of camshaft design.

Tuning After Installation: Why It Is Non-Negotiable

You absolutely cannot skip the tuning step. The TSP Stage 2 camshaft changes the engine volumetric efficiency so much that the stock calibration will be dangerously lean at wide-open throttle. Running lean can cause detonation, melted pistons, and valvetrain damage. You have several tuning options depending on your engine management system.

  • Carbureted: Re-jet the carburetor and adjust the idle mixture screws. A wideband oxygen sensor and gauge are extremely helpful for dialing in the air-fuel ratio.
  • Throttle-body injection (TBI): Use a chip burner or a flash tool to reprogram the ECU. This is a more advanced route, and you will need a custom PROM or a real-time tuning emulator.
  • Multi-port injection (MPI): Use a standalone ECU (Holley Terminator X, FAST XFI, or Megasquirt) or a flash tuner if a stock ECU is available. Standalone systems offer full control over timing and fuel maps.

A good tuner will dial in the idle timing (usually around 15-18 degrees at idle), the fuel mixture at idle and cruise, and the wide-open-throttle timing curve. You should expect to pay $300 to $600 for a professional dyno tune, but it is the best money you can spend after the cam install. A proper tune not only maximizes power but also ensures the engine runs cool, starts easily, and gets reasonable fuel economy on the highway.

Conclusion

The TSP Stage 2 camshaft is a well-rounded performance upgrade for the Chevy 350 that delivers genuine power gains, a fantastic sound, and excellent real-world drivability. For an investment of around $1,000 to $2,000 in parts and labor, you can add 25 to 35 horsepower and extend the engine RPM range by over 1,000 RPM. The cam is forgiving enough for a street-driven car or truck, yet aggressive enough to make a meaningful difference at the track. As with any cam swap, the key to success lies in careful installation, proper supporting modifications, and a thorough tune. If you take your time and do it right, you will have a Chevy 350 that sounds mean, pulls hard, and puts a smile on your face every time you hit the throttle.

If you are ready to order your TSP Stage 2 cam, visit the Texas Speed & Performance website to see current pricing and availability, and check their cam card for detailed installation specs. For further reading on camshaft theory and selection, the OneDirt camshaft selection guide is a great resource for beginners and experienced builders alike.