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Regular price $837.00 AUD
Regular price Sale price $837.00 AUD
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COMP Cams is bringing the musclecar sound back and it's nastier than ever! Let's face it, few things serve to grab our attention at a car show or cruise night more than a car with a thumping high performance idle. In fact, one of the most frequent questions fielded when customers call our tech line is, "what camshaft will give my car that mean-sounding idle?" In an ongoing quest to provide you with the performance and sound you demand, COMP Cams' engineering team proudly introduces the Thumpr series of camshafts. The Thumpr camshafts are a new series of retrofit hydraulic roller camshafts designed for use in engines that were originally equipped with flat tappet camshafts. The lobe profile and grind characteristics of these new Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the cams. They give you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in three different grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. These Thumpr series camshafts feature a cutting-edge hydraulic roller design that delivers a substantial power increase over identical hydraulic flat tappet grinds without sacrificing reliability or ease of maintenance.
Application: Ford Windsor 289-302 C.I.D (check notes)
Cam Style:Hydraulic roller tappet
Basic Operating RPM Range:1,900-5,600
Intake Duration at 050 inch Lif227
Exhaust Duration at 050 inch Lif241
Duration at 050 inch Lif227 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:0.531 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.515 in.
Valve Lift with Factory Rocker Arm Ratio:0.531 int./0.515 exh.
Lobe Separation (degrees):107
Computer-Controlled Compatible:No
Grind Number:283THR7
Valve Springs Required:Yes
Quantity:Sold individually.
Notes:Designed for pre-roller block applications. Not design for stock EFI applications.
Footnotes:31 - These cams can only be used in 289 and 302 engines. Not for 302 H.O. blocks due to base circle size.

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