Do lighter rocker arms increase horsepower?

For engine applications that demand a step up, replacing the stock stamped or cast steel rockers with aluminum roller rockers will typically produce a gain of 10 to 15 hp with the same lift ratio, and even more of a power gain with a higher lift ratio.

What does increasing rocker arm ratio do?

An increase in rocker arm ratio nets more than additional lift. It will also change the cam’s duration characteristics. Because the increased ratio effectively speeds up valve movement, that means the valve will reach any opening height sooner than it would with a lower-ratio rocker arm.

What do aftermarket rocker arms do?

Essentially, changing to a rocker arm ratio that is larger, is comparable to increasing the lift of your camshaft. Increasing the opening distance of both valves can usually increase power because your engine can move more air.

How do I choose my rocker arm ratio?

The ratio of a rocker arm refers to the amount of movement on the valve side of the rocker arm in comparison to the pushrod side. A 1.5:1 rocker arm will move a valve 1.5 times the lift of the cam, assuming all things are in proper working order. If your cam has a lift of . 4 inches, multiply by 1.5 to get .

How much HP gain with roller rockers?

You can easily gain 20 horsepower with a rocker arm swap, but installing them isn’t quite as simple as removing the stock rockers and bolting on new ones. For seasoned car guys, it’s a quick process, but if you’re new to the task of setting valve lash you might want to take some notes before you tackle the project.

Do roller rockers add HP?

Roller rockers make power two ways. First, a rollerized rocker fulcrum reduces energy losses from mechanical friction in the drivetrain, freeing up horsepower.

Are roller rockers worth it?

Besides the potential power benefits of an increase in rocker ratio, roller rockers have several additional power-adding advantages compared with a stamped rocker. The advertised ratio of aftermarket roller-tip rockers is more accurate than the claimed ratio of typical stock stamped rockers.

How much HP do roller lifters add?

The total difference in horsepower between the solid roller and hydraulic roller setup is just slightly over 8 horsepower. In fact, both cams actually made about the same ft-lbs of torque at the same RPM. So what does it all mean?

Are roller rocker arms worth it?

How long will roller rockers last?

approximately 20,000-30,000 miles
Used on a daily driven engine with a stock valvetrain, the rockers will last approximately 20,000-30,000 miles with regular oil changes. Since you run your engines for 250,000-plus miles, you would end up replacing aluminum rockers quite often.