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Comp Cams | Mutha' Thumpr™ | .283/.303 | .563/.546

CompCams

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MSRP: $320.99
$288.14
(You save $32.85 )
Mutha' Thumpr™ High performance street/ strip cam, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle. GM LS Gen III/IV 8 Cyl. '97-Current Three-Bolt 4.8/5.3/5.7/6.0/6.2/7.0L Engine. Cannot use stock springs. Custom computer tuning required.
SKU:
COMPCAM.283303563546.BCI546011
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Product Overview

 

MUTHA' THUMPR™ - High performance street/strip, needs 9:1 CR, 2500+ stall, intake, gears, and headers, rough idle.

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Specifications     Intake Exhaust
RPM Range: Valve Lash:
Valve Timing: Duration:
Lobe Separation:   Duration @ .050" Lift:
Intake Centerline: Valve Lift:
    Lobe Lift:
Valve Timing @ 0.006  Lift:      
  Exhaust
Closes 42
  ATDC
Opens 81
  BBDC
103Valve Timing Diagram
Intake  
37 Opens
BTDC  
66 Closes
ABDC  
Recommended Components
ComponentPart Number
Lifter Kit 850-16 [11] / 875-16 [11]
Timing Set 3158KT
Rocker Arms 19026-16 / 1500 / 13702-KIT
Push Rods 7955-16
Valve Springs 26918-16
Dual Valve Spring Kits 26925TS-KIT
Camshaft Break-In Lube 159

 

compcamcca-54-412-11-cp.jpg

 

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