Header banner
Revain logoHome Page
cams k31 601 8 camshaft 291th thumpr logo

Cams K31 601 8 Camshaft 291TH Thumpr Review

3

·

Terrible

Revainrating 2 out of 5  
Rating 
1.8
🚀 Engines & Engine Parts, 🏎️ Performance Car Parts & Accessories

View on AmazonView on ЯM

Media

(1)
img 1 attached to Cams K31 601 8 Camshaft 291TH Thumpr

Description of Cams K31 601 8 Camshaft 291TH Thumpr

High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle. 2,200-5,900 RPM Operating Range. 235/249 Duration at .050". 107 Degree Lobe Separation Angle. 0.54"/0.526" Valve Lift. K Kits vary in their contents, but generally contain a camshaft, a set of lifters, valve springs, retainers, locks, valve seals, timing set, decals and instructions. Check description for more accurate listing of kit contents. Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note. Best with aftermarket converters and more rear gear. Perfect choice for muscle cars and street rods - Three unique cam designs: Thumpr, Mutha' Thumpr and Big Mutha' Thumpr deliver excellent horsepower gains and broad torque curve. Fits Ford 221-302 w/ OE Flat Tappet Cams. Made in USA.

Reviews

Global ratings 3
  • 5
    0
  • 4
    1
  • 3
    0
  • 2
    0
  • 1
    2

Type of review

Revainrating 1 out of 5

Disappointing Performance Camshaft for Automotive Use

After trying this product, I am highly disappointed in its performance. The advertised "Thumpr" noise was the only positive aspect, but it did not make up for the decrease in power and torque. The camshafts were difficult to install and ended up causing more problems than benefits. Overall, I cannot recommend this product for automotive use.

Pros
  • Produces "Thumpr" noise
Cons
  • Decrease in power and torque, difficult to install

Revainrating 1 out of 5

Split Cam and Lifter Kit

This should be an aftermarket kit. Cam, lifter, dog bone and spider. All that has arrived is the cam and lifters. It took almost a month and a dozen phone calls to get the refund.

Pros
  • Engines and Engine Parts
Cons
  • Cargo

Revainrating 4 out of 5

Ford Cam Firing Order

When you install rollers in a Small Block Ford, the firing order changes to order 351W. If you stick with a Ford 302 or 289 hydraulic flat tappet, that is the original Ford 302/289 firing order. All new reel units use the 351 W power-up sequence.

Pros
  • Engine Parts
Cons
  • Crumpled Packaging