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Street Race Truck More... The Toolbox
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$357.99
$344.99
COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B
COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B

COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B

Chrysler Small Block V8, Hydraulic Roller Tappet Camshaft Type, 2500 to 6200 RPM Range

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COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B
COMP Cams 20-603-9 Thumpr Hyd. Roller Camshaft, Mopar S/B
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We estimate this item will ship on or before December 18th.
Part # 282206039
$344.99
$357.99
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Important Messages:

  • This item ships directly from the manufacturer. It may take an additional 3 business days for COMP Cams to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.

Details

Camshaft Type:
Hydraulic Roller Tappet
RPM Range:
2500 to 6200
Intake Duration:
299
Exhaust Duration:
319
Lobe Separation:
107 °
Grind Number:
299THR7
Intake Duration (.050" Lift):
243
Exhaust Duration (.050" Lift):
257
Intake Valve Lift w/ Rocker Arm Ratio:
0.533"
Exhaust Valve Lift w/ Rocker Arm Ratio:
0.519"
MFG. Part #:
20-603-9
GTIN Code:
036584150978
External Ignition Box Required:
No
Valve Springs Required:
Yes
Sold in Quantity:
Each

Info

COMP Cams Big Mutha Thumpr 299THR-7 Hydraulic Roller Camshaft for Small Block Chrysler.

Thumpr Retro-Fit Hydraulic Roller Camshafts. Hydraulic Roller-(Big Mutha' Thumpr) Street/strip, needs 9.5:1 CR , 2800+ stall, intake, gears, and headers, very rough idle. 3 grinds to fit all of your performance needs. Unique design. Maximizes sound and mid to high RPM power. Ensures safe piston-to-valve clearance. Proven to generate 25+ RWHP gains. Does not compromise durability.

  • Three unique cam designs for each application that deliver excellent horsepower gains & broad torque curve; perfect choice for muscle cars & street rods
  • Early intake valve opening & long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note
  • Best with aftermarket converters & more rear gear

Application

1971-89 Chrysler 318-360
1964-89 Plymouth 273-360
1964-91 Dodge 273-360
Some parts are not legal for use in California or other states with similar laws/regulations

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  • Learn the basics to engine performance like; how does a cam work? What is Valve lift, duration, lobe separation angle, and cam profiles? Afterwords selecting the right camshaft will be less of a guessing game!
  • Picking a proper camshaft for your project can rapidly deteriorate into chaos. So many possibilities. Want a little advice? Click here!
  • One of the most important parts of your racing operation is the engine. This article gives a detailed overview on how to maintain your engine to get the most out of it for as long as possible. Also learn some tips to prolong the life of your engine.
  • The art of selecting a camshaft that performs right in your street rod may become easier with experience, but the choice is less of a guessing game once you have a few of the basics, found in this latest article from Speedway.
  • Tim M. has tried to stay true to the vintage route, but sometimes, exceptions must be made. For example, the original oiling system's paper element and canister are functional, but an upgraded system will be more reliable.
  • In part 2, you will read about the Generation 4 small block series of V8s that share the same platform as the Generation 3 discussed in part 1.

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