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Comp Cams Mutha Thumpr 287TH7 High Performance Street/Strip Rough Idle
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Comp Cams Mutha Thumpr 287TH7 High Performance Street/Strip Rough Idle



Part #: 12-601-4
List Price: $287.98
Our Price: $143.99
You Save: $143.99

Availability: In Stock



Small Block Chevy 262-400, 1955-1998, 287T H-107  Mutha' Thumpr™ hydraulic Flat Tappet Cam. Mutha' Thumpr™ - High performance street/strip, needs 9:1 CR, 2500+ stall, intake, gears, and headers, rough idle

RPM

CAM

DURATION

  VALVE LIFT

Lobe

OPERATING

Grind

ADVERTISED

@ .050”

@ 1.5:1

Sep

Range

Number

IN.

EX.

IN.

EX.

IN.

EX.

Angle

2200-6100

287TH7

287

305

235

249

.489

.476

107°

Musclecar sound is back and nastier than ever;
Thumpr™ Cams deliver incredible exhaust lope and impressive performance

Part Number 12-601-4
Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS287T H-107 MT
Description SBC Motha Thumpr Hydraulic FT  

  Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.49 0.475
Duration At 0.006 Tappet Lift 287 305

Valve Timing At 0.006    
  Open Close
Intake 40 80
Exhaust 67 45

These Specs Are For The Cam Installed At 102 Intake CL
  Intake Exhaust
Duration At 0.05 235 249
Lobe Lift 0.327 0.317
Lobe Separation 107  

Recommended Valve Springs 981-16

Let's face it, nothing grabs our attention at a car show or cruise night more than the hard hitting sound a thumping, high performance idle. Thumpr™ Camshafts deliver that aggressive, head-turning sound like no other cam on the market. Available in hydraulic flat tappet and hydraulic roller camshafts, Thumpr™ Cams are now available for most popular applications, carb and late model efi.

Designed to provide maximum performance when combined with the latest in valve train components, such as Beehive™ Valve Springs, Ultra Pro Magnum™ Rockers and Magnum™ Pushrods

 

Advertised Duration 287 int./305 exh.
Advertised Exhaust Duration 305
Advertised Intake Duration 287
Basic Operating RPM Range 2,200-6,100
Brand COMP Cams
Cam Style Hydraulic flat tappet
Computer-Controlled Compatible No
Duration at 050 inch Lift 235 int./249 exh.
Exhaust Duration at 050 inch Lift 249
Exhaust Valve Lash 0.000 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.476 in.
Grind Number 287TH7
Intake Duration at 050 inch Lift 235
Intake Valve Lash 0.000 in.
Intake Valve Lift with Factory Rocker Arm Ratio 0.489 in.
Lobe Separation (degrees) 107
Part Type Camshafts
Product Line COMP Cams Thumpr Hydraulic Flat Tappet Camshafts
Quantity Sold individually.
Valve Lift with Factory Rocker Arm Ratio 0.489 int./0.476 exh. lift

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