Do roller rockers actually add horsepower? Or is there some other good reason to have them? If they free up horsepower robbing friction, is it worth the same or more power than tuning the engine with timing and jets? Do carb spacers work? Yes they do, but how much power can you really gain? Richard Holdener is putting them all to the test to see how they stack up against each other and to show whether they are worth adding to your combo.

Video Description:

FULL DYNO RESULTS. DIRT CHEAP 350 CHEVY POWER MODS. HOW MUCH POWER ARE ALUMINUM ROLLER ROCKERS WORTH? DO ROLLER ROCKERS REDUCE FRICTION? DO ROLLER ROCKERS ADD POWER? HOW MUCH POWER IS IGNITION TIMING WORTH? HOW MUCH POWER IS CARB JETTING WORTH? HOW MUCH POWER IS A WILSON CARB SPACER WORTH? CHECK OUT THIS VIDEO ON A SMALL-BLOCK 350 CHEVY WHERE I DEMONSTRATED THE GAINS OFFERED BY CHANGES IN IGNITION TIMING FORM 20 DEGRES TO 37 DEGREES. THE DYNO ALSO SHOWED THE GAINS OFFERED BY CHANGES IN AIR/FUEL RATIO FROM CHANGING THE JETS THE HOLLEY CARB. ALSO TESTED WERE CARB SPACERS AND ALUMINUM ROLLER ROCKERS. CHECK IT OUT.