Summit Racing Adds New Grinds to Its Pro LS Turbo Camshafts Line

Like an ice cream parlor with only one flavor, having just one Summit Racing™ Pro LS Turbo camshaft just wasn’t proper. So our Pro LS people came up with three more cam grinds to cover engine builds from mild to gnarly.

These hydraulic roller camshafts are precision-machined from high-quality, American-made steel. Their state-of-the-art lobe designs pull strongly past 7,000 RPM using valve springs rated as little as 150 lbs. at the seat and 400 lbs. of open spring pressure. The cams work well with stock rockers and budget-friendly valve spring and retainer kits.

Summit Racing Pro LS Turbo cams have the same intake lobes and cam timing as the Pro LS naturally aspirated cams, but the exhaust closing point is changed to reduce overlap. The cams allow for quick turbo spool-up and are great for single T4 Hotside applications running a full performance exhaust.

Find the Pro LS Turbo camshaft stage that best fits your needs:

Stage One
This cam has a 2,800 to 6,000 RPM operating range and works great as a sleeper/stealth cam.
• Duration @.050: 222° intake/233° exhaust
• Lift with Factory Rocker Arm Ratio: .600” intake/.575” exhaust
• Lobe Separation: 115°

Stage Two
This cam has a 2,800 to 7,000 RPM operating range. It pulls hard in the mid-range with great top-end power. It’s recommended for use with LS6 valve springs and a 2,800 RPM stall torque converter.
• Duration @.050: 226° intake/230° exhaust
• Lift with Factory Rocker Arm Ratio: .600” intake/.575” exhaust
• Lobe Separation: 113°

Stage Three
This cam has a 3,000 to 7,000 RPM operating range and a serious lope. It makes great mid-range and top-end power. A 2,800 RPM stall torque converter is recommended.
• Duration @.050: 231° intake/234° exhaust
• Lift with Factory Rocker Arm Ratio: .600” intake/.575” exhaust
• Lobe Separation: 115°

Stage Four
This cam has a 3,500 to 7,200 RPM operating range. It’s for max-effort single turbo cars and has a very aggressive idle. A 3,500 RPM stall converter is recommended.
• Duration @.050: 237° intake/234° exhaust
• Lift with Factory Rocker Arm Ratio: .625” intake/.600” exhaust
• Lobe Separation: 117°

Just a note—the Pro LS Turbo camshafts are compatible with computer-controlled engine management, but are not emissions-legal and will not work with engines that have Active Fuel Management or Variable Valve Timing. Engine tuning is required.

You can learn more about Summit Racing’s entire Pro LS Camshaft line in this OnAllCylinders blog story. 

SEE SUMMIT RACING’S PRO LS TURBO CAMSHAFTS