Building a Track-Ready Camaro 350 Small Block

The Chevrolet Camaro is an icon of American muscle, and the 350 cubic inch small-block V8 is the engine that defined an era. From the first-generation ’69 models with the DZ 302 to the later LT-1s and crate engines, the 350 small block remains the go‑to foundation for track‑focused builds. Its balance of displacement, weight, and aftermarket support makes it ideal for road courses, autocross, or time‑attack events. But turning a street cruiser into a consistent track weapon requires more than bolt‑on parts—it demands a carefully integrated package of camshaft, intake, cylinder heads, suspension, and supporting systems. In this guide, we’ll break down the essential modifications to build a Camaro 350 small block that performs lap after lap.

Understanding the 350 Small Block Foundation

The small-block Chevy 350 was produced from 1967 through the late 1990s in countless variations. For track use, the most desirable blocks are the four‑bolt main versions found in many high‑performance applications. The 350’s 4.00‑inch bore and 3.48‑inch stroke provide excellent torque and rev potential. However, the stock heads, cam, and intake are optimized for low‑RPM economy, not sustained high‑RPM power. Upgrading these components is the key to unlocking the engine’s true track capability.

A track build also requires attention to the bottom end. While a stock cast crank and rods can handle 350–400 hp, a build targeting 450+ hp should include forged pistons, forged rods, and a forged or nodular iron crank. Upgrading to a steel main cap girdle and ARP main studs adds insurance against high‑RPM harmonics. Balancing the rotating assembly is essential for smooth operation up to 6,500 rpm or more.

Camshaft Recommendations for High‑RPM Power

The camshaft dictates how the engine breathes at different engine speeds. For a track‑driven Camaro, you want a cam that shifts the powerband upward without sacrificing too much low‑end grunt for corner exits. The following cams are proven winners for track and autocross applications.

Comp Cams Xtreme Energy 268H

The Comp Cams Xtreme Energy 268H (part #12‑244‑4) is a classic choice that offers an excellent blend of street manners and track performance. With a duration of 268° intake/268° exhaust at 0.006 tappet lift, and 224°/224° at 0.050, this cam provides strong mid‑range punch. The 0.477‑inch lift (intake and exhaust) is manageable with stock rockers, but a set of upgraded valve springs is still recommended. This cam works well with a 2,500–3,000 rpm stall converter and a dual‑plane intake like the Edelbrock Performer RPM. The LSA is 110°, producing a noticeable lope at idle that helps carry corner speed.

Lunati Voodoo 60103

For a more aggressive track‑only setup, the Lunati Voodoo 60103 delivers. This stick features a 277°/287° advertised duration, 237°/247° at 0.050, and an intake lift of 0.513″ on a 106° LSA. The asymmetrical lobes increase area under the curve, pulling hard from 3,500 to 7,000 rpm. This cam requires upgraded valve springs (such as Lunati’s 73004 kit), hardened pushrods, and likely a single‑plane intake to reach its full potential. It will have a radical idle and demands a higher‑stall converter (3,000–3,500 rpm) and 3.73 or deeper rear gears. The trade‑off is an exhilarating power delivery that will keep you ahead on any straight.

Summit Racing SUM-1104

If you’re on a budget but still want a substantial upgrade, the Summit Racing SUM-1104 is an excellent value. Its specs are 276°/286° advertised duration, 224°/234° at 0.050, and 0.466″/0.488″ lift with a 112° LSA. This cam provides a broad torque curve and excellent idle quality for a performance cam. It pairs well with both dual‑plane and affordable single‑plane intakes. The 112° LSA keeps vacuum stable, allowing power brakes and a relatively smooth idle—great for a street‑driven Camaro that sees regular track days.

Always replace valve springs, retainers, and seals when installing a new cam. For any of the above cams, use a spring kit rated for 0.550‑inch lift or more to avoid coil bind. Break‑in with a high‑zinc break‑in oil and follow the manufacturer’s run‑in procedure.

Intake Manifold Selection

The intake manifold is the engine’s respiratory system. A poor choice will choke power regardless of cam selection. For track use, you need a manifold that delivers consistent airflow across a wide RPM range without penalizing mid‑range torque.

Dual‑Plane vs Single‑Plane for Track

Dual‑plane manifolds (like the Edelbrock Performer RPM) split the plenum, providing better low‑ and mid‑RPM torque and crisp throttle response. They work best with cams that have duration up to about 230° at 0.050. Single‑plane manifolds (like the Holley Street Dominator or Weiand Team G) have an open plenum that favors high‑RPM power, typically above 4,500 rpm. For a road‑course car that needs to pull out of tight corners, a dual‑plane is often the better choice. For a high‑RPM, big‑cam build (over 240° at 0.050), a single‑plane will unlock top‑end power.

Edelbrock Performer RPM

The Edelbrock Performer RPM (part #7101) is the gold standard for dual‑plane intakes. It flows 650 cfm out of the box (dual-plane limitation) but supports up to 550 hp. It fits 350‑400 small‑blocks with standard or Vortec heads and provides a broad torque plateau from 1,500 to 6,500 rpm. The idle quality is excellent, and it accepts square‑bore or spread‑bore carbs with an adapter. For a track daily‑driver hybrid, this is the manifold to beat.

Holley Street Dominator

The Holley Street Dominator (part #300‑36) is a single‑plane manifold designed for higher‑RPM power while retaining decent mid‑range. It flows 800 cfm and works best with cams that have 230°‑250° of duration at 0.050. It’s a great upgrade for a Holley carb (4150 series) and gives a noticeable top‑end charge. Expect a small reduction in low‑end torque compared to the Performer RPM, but if your cam and gearing are aggressive, the Street Dominator will reward you on the back straight.

Weiand Stealth

Weiand’s Stealth (part #8125) is a dual‑plane that rivals the Edelbrock Performer RPM. It features a unique divider design that improves flow at higher RPM while maintaining low‑end torque. It’s a direct competitor, often priced lower. The Stealth supports up to 650 hp and provides good idle vacuum. Many builders prefer the Stealth for its smoother finish and slightly better top‑end extension.

Important: Match your intake to your cylinder head port size. If you have aftermarket heads like AFR 190 or 195, choose the appropriate intake version (e.g., Edelbrock Performer RPM #7111 for Vortec heads).

Cylinder Head Upgrades – The Bottleneck

No amount of cam or intake will compensate for restrictive cylinder heads. The stock 350 heads (76cc chambers, 1.94/1.50 valves) choke power above 350 hp. For a track build, upgrading to aluminum heads is one of the best investments.

Aftermarket Head Recommendations:

  • AFR 190cc Eliminator: Flows 270 cfm out of the box. Perfect for street‑track builds with cams up to 0.550″ lift. Lightweight and efficient.
  • Dart SHP 180cc: Budget‑friendly but excellent flow for the price. Works well with dual‑plane intakes.
  • Edelbrock E‑Street 60859: 170cc intake runner, ideal for mild track builds with the Performer RPM intake.
  • Dart Pro 1 200cc: For serious power (450+ hp). Requires a single‑plane intake and a cam with 240°+ duration at 0.050.

Aluminum heads reduce weight by about 40 lbs over the nose, improving front‑end grip. They also run cooler—critical for sustained track use. Pair with a high‑volume oil pump and a windage tray to protect the rotating assembly.

Fuel System for Sustained WOT

Running a track day requires a fuel system that delivers consistent flow under high G‑forces. Stock mechanical pumps can cause fuel starvation in long corners.

Carbureted Builds: Upgrade to a Holley 4150 carburetor (750 cfm vacuum secondary) with a high‑pressure mechanical pump (e.g., Holley 12‑802‑2, 110 gph). Add a Holley fuel pressure regulator and a billet fuel rail. Use a 1‑inch phenolic spacer between the carb and intake to reduce heat soak.

EFI Conversion: For a more modern approach, consider a Holley Sniper 2 EFI system or a FiTech Go EFI. EFI eliminates vapor lock, provides timing control, and self‑tunes for altitude changes. It also improves throttle response and fuel economy. A system with a self‑learning ECU and a high‑output in‑tank fuel pump (e.g., Walbro 255 lph) is ideal for track use.

Always install a one‑way check valve in the fuel line near the pump to prevent drain‑back and hot restart issues.

Exhaust System Design

Restrictive exhaust reduces power and can cause excessive under‑hood temperatures on a track car. For a Camaro 350, go with long‑tube headers (1⅝″ or 1¾″ primary tubes) into a dual 2½″ or 3″ exhaust system with an X‑pipe.

  • Headers: Hooker Competition or Hedman Hedders are cost‑effective. For maximum power, step up to 1¾″ with 3″ collectors. Ensure they have O2 bungs for EFI.
  • Mufflers: Use a chambered muffler like the Flowmaster 40 Series or a straight‑through design like the Borla XR‑1. Both flow well and sound aggressive.
  • X‑pipe: A true crossover balances exhaust pulses, improving torque and reducing interior drone.

Your exhaust system should be as short as practical; avoid excess pipe length that adds weight and restricts flow.

Suspension Modifications for the Track

A Camaro’s stock suspension is designed for comfort, not cornering. To handle the extra power and maintain traction, you must address front and rear geometry.

Front Suspension Upgrades

  • Performance Shocks & Struts: Adjustable shocks (e.g., QA1 or Viking) allow you to tune rebound and compression for different tracks. Set the fronts firmer to control dive under braking.
  • Heavy‑Duty Sway Bar (1¼″ – 1⅜″): Reduces body roll dramatically. Pair with polyurethane bushings.
  • Lowering Springs: 1‑1½ inch drop improves center of gravity and reduces weight transfer. Check spring rates—600–700 lbs/in front, 150–200 lbs/in rear for a balanced setup.
  • Subframe Connectors: These tie the front and rear subframes together, preventing chassis flex. Step‑up to weld‑in connectors; bolt‑ons are insufficient for track use.

Rear Suspension Upgrades

  • Multi‑Leaf Springs or Coil‑Overs: Factory mono‑leaf springs are weak. Upgrade to aftermarket multi‑leaf springs (e.g., Hotchkis or Detroit Speed) for better spring rate control. For ultimate adjustability, install a coil‑over conversion kit with adjustable lower control arms and a panhard bar.
  • Adjustable Panhard Bar: Centers the rear axle and allows you to adjust roll steer. Essential for consistent cornering.
  • Torque Arm: A aftermarket torque arm (e.g., BMR or UMI) prevents axle wrap and improves acceleration traction.

Brakes and Tires

No amount of power matters if you can’t stop. Upgrade to:

  • Performance Brake Pads: Hawk DTC‑70 or Carbotech XP‑10 for track day heat resistance.
  • Slotted Rotors: Improve pad bite and reduce gas buildup. Do not use cross‑drilled on a track car (they crack).
  • High‑Temp Brake Fluid: DOT 4 (Racing) with a dry boiling point over 600°F. Flush fluid before every event.
  • Tires: 200‑TW tires like the Falken Azenis RT660 or Hankook Ventus R‑S4 provide excellent grip for track days. Staggered widths (275 front, 295 rear) help balance understeer.

Cooling System – The Overlooked Mod

On a road course, a Camaro’s stock cooling system will quickly overheat. Plan for sustained full‑throttle runs and 30‑minute sessions.

  • Replace the stock clutch fan with an electric fan system (e.g., SPAL 16″ puller). Use a Derale high‑flow water pump or a Stewart Components Stage 1 pump.
  • Install a high‑capacity aluminum radiator (e.g., Be Cool or Champion) with at least a 2‑row core, 1″ tubes.
  • Add an engine oil cooler and transmission cooler (if automatic). Mount them in the airstream, not behind the radiator.

Use a 180°F thermostat and wire the electric fan to a temperature switch set to 185°F. Consider a hood scoop or cowl induction to pull heat out of the engine bay.

Ignition System and Timing

A sharp ignition system ensures complete combustion at high RPM. Start with an HEI distributor (upgraded with a high‑output coil and module). For precise timing control, switch to a MSD Pro‑Billet distributor (PN 8365) with a 6AL ignition box (PN 6420). This setup provides a strong, consistent spark and allows you to program a timing curve.

Timing Curve for Track: Set initial timing to 10°‑12° BTDC, total timing to 34°‑36° by 3,500 rpm. For aggressive cams, you may need to limit total to 32° to prevent detonation under load. Use a knock sensor (aftermarket) to fine‑tune.

Tuning and Engine Management

Whether carbureted or EFI, you must tune for the track. A lean condition under wide‑open throttle will cause detonation and melt pistons. Use a wide‑band oxygen sensor (e.g., Innovate LC‑2) and data logger to monitor air/fuel ratio in real time. Target 12.8‑13.0:1 at WOT for pump gas (91 octane).

For EFI systems like the Holley Sniper, use the self‑tuning mode and then perform a “learn” drive with the throttle wide open on a closed road or dyno. For carbureted engines, jetting changes and power valve selection are critical. A vacuum secondary Holley (or Quick Fuel) carburetor is easier to tune than a double‑pumper for road course use, as it adjusts to varying loads.

Finally, invest time in chassis alignment. For a track‑focused Camaro, typical alignment specs are: -2.0° to -2.5° camber front, 0° to 0.5° rear camber, 4°‑5° caster, and a toe of 1/16″ total toe‑out front, 1/8″ toe‑in rear. This setup reduces tire wear while maximizing cornering grip.

Conclusion

Building a track‑ready Camaro 350 small block is a journey that rewards careful planning and execution. Start with a strong bottom end, then layer on the cam, heads, intake, and supporting systems. Choose a cam that matches your RPM goals—the Comp 268H for a balanced street‑track car, the Lunati Voodoo for all‑out aggression. Pair it with a dual‑plane intake like the Edelbrock Performer RPM for broad torque or a single‑plane Holley Street Dominator if you live above 4,500 rpm. Upgrade to quality aluminum heads and a Holley Sniper EFI for modern convenience. Don’t overlook suspension—subframe connectors, poly bushings, adjustable shocks, and a well‑dialed alignment will transform the car’s behavior. And always keep cooling, ignition, and tuning in check.

With the right parts, your Camaro 350 can be a reliable, fast, and exhilarating track machine that holds its own against modern sports cars. For further reading, check out Comp Cams camshaft options, Edelbrock intake manifolds, and Holley carburetors and EFI systems. Properly assembled, this combination will deliver lap‑after‑lap satisfaction.