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Technical Articles for Part Number SUM-1223
Summit Racing™ Pro SBC LS Firing Order Hydraulic Roller Camshafts SUM-1223
Part Number: SUM-1223
Summit Racing™ Pro SBC LS Firing Order Hydraulic Roller Camshafts
Pro SBC Retrofit Stage 3 Hyd. Roller LS Firing Order Cam, 224/232 Dur., 110 LSA + 2 Adv, .550/.540 1.5 Ratio, .587.576 1.6 Ratio, 2000-6300 RPM Range
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Estimated Ship Date: Monday 10/19/2026 Would you rather pick it up?
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Overview
Brand:
Manufacturer's Part Number:
SUM-1223
Part Type:
Product Line:
Summit Racing Part Number:
SUM-1223
UPC:
190861265783
Cam Style:
Hydraulic roller, Retro-fit
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
The Stage 3 cam works with likes a 3.23+ gears and works best with a 2500+ stall converter. It has a steady rolling lope with a 327 CID engine or larger. Great for weekend drivers.
Basic Operating RPM Range:
2,000-6,300
Intake Duration at 050 inch Lift:
224
Exhaust Duration at 050 inch Lift:
232
Duration at 050 inch Lift:
224 int./232 exh.
Advertised Intake Duration:
276
Advertised Exhaust Duration:
281
Advertised Duration:
276 int./281 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.550 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.540 in.
Valve Lift with Factory Rocker Arm Ratio:
0.550 int./0.540 exh.
Lobe Separation (degrees):
110
Camshaft Gear Attachment:
3-bolt
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
Cam features the LS firing order, which swaps 4-7/2-3. Reroute plug wires for 1-8-7-2-6-5-4-3. Cam button and melonized or composite distributor gear required. Designed for engines originally equipped with flat tappet camshaft.
Summit Racing™ Pro SBC LS Firing Order Hydraulic Roller Camshafts
Summit Racing™ Pro SBC LS firing order hydraulic roller retrofit cams are available in seven stages, from a small smooth idle cam capable of towing, to a big duration stomper that's ready to go bracket racing. By utilizing the LS firing order on a traditional small block Chevy improves the engine in several ways. The benefits include improved combustion chamber cooling for reduced detonation, more power and torque gains, better mixture distribution, along with reductions in vibration and bearing wear. Best of all—these Pro SBC LS firing order hydraulic roller retrofit cams are precision ground in the USA on USA Billets! Order the cam for your application needs.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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