Product Description
COMP Cams Thumpr Hydraulic Roller Camshafts 54-601-11
Camshaft, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .563/.546, Chevy, Small Block, LS
COMP Cams Thumpr Hydraulic Roller Camshafts
Camshaft, Hydraulic Roller Tappet, Advertised Duration 283/303, Lift .563/.546, Chevy, Small Block, LS
Brand: COMP Cams
Manufacturer's Part Number: 54-601-11
Part Type: Camshafts
Product Line: COMP Cams Thumpr Hydraulic Roller Camshafts
UPC: 036584195177
Cam Style: Hydraulic roller, OE roller
Camshaft Use: Street/Strip
Basic Operating RPM Range: 2,300–6,600
Intake Duration at a 50-inch Lift: 227
Exhaust Duration at a 50-inch Lift: 241
Duration at a 50-inch Lift: 227 int./241 exh.
Advertised Intake Duration: 283
Advertised Exhaust Duration: 303
Advertised Duration: 283 int./303 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.563 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.546 in.
Valve Lift with Factory Rocker Arm Ratio: 0.563 int./0.546 exh.
Lobe Separation (degrees): 109
Camshaft Gear Attachment: 3-bolt
Remanufactured: No
Computer-Controlled Compatible: Yes
Grind Number: 283THR9
Valve Springs Required: Yes
Quantity: Sold individually.
Notes:
Cannot use stock springs. Stall converter (2500 and up), 9:1 compression, gears and headers are recommended. Custom computer tuning required.
COMP Cams Thumpr Hydraulic Roller Camshafts
COMP Cams has awakened the muscle car sound—and it is nastier than ever! Thumpr Series camshafts are a line of cutting-edge hydraulic roller camshafts for engines originally equipped with flat tappet cams. With them, you can expect a substantial power increase without sacrificing reliability or ease of maintenance! The lobe profile and grind characteristics of Thumpr cams include an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap. This maximizes rough-idling tendencies, delivering a seriously aggressive exhaust note without affecting engine power output. Thumpr camshafts are available in a variety of grind profiles, each producing impressive horsepower and torque performance within a different rpm range.
