Rhoads
Variable Lifters

Boost Low-End Torque
Up To 25%

Did you know that just by using Rhoads Variable Duration Lifters with your cam instead of stock hydraulic lifters you can gain up to 25% more low-end torque and 3 more inches of vacuum? It's true. You'll even get a smoother idle plus super mid power and all the top-end power that the cam was designed to give.

Here's Why...
For maximum low-end torque, engine vacuum, and fuel economy you need a smaller cam. But smaller cams rob mid and upper rpm power needed for fast acceleration. For more mid and upper rpm power you need a larger, more powerfull camshaft. But larger cams are murder on low-end torque, manifold vacuum, fuel economy, and idle quality.

Rhoads Variable Lifters give you both...
With Rhoads Lifters you get both... that's because Rhoads Lifters work automatically to give you a smaller cam at lower rpm and compliment your larger cam at higher rpm for the best of both worlds.

Here's How...
At idle and low rpm where lugging power and more torque are needed Rhoads Lifters 'bleed down' to make your cam seem smaller... about 10 degrees smaller. This really boosts low-end torque, manifold vacuum, fuel economy, and idle quality.

At higher engine speeds where more cam really boosts mid and upper rpm power Rhoads Lifters work to maintain the full lift and duration of your cam for maximum top-end power. As your engine revs higher Rhoads Lifters bleed less because there is simply less time to bleed at higher engine speeds. Near 3500 rpm the bleed action has virtually disappeared, shifting your full cam and maximum horsepower potential back into action.

For example, using a hydraulic cam with 270 degrees advertised duration and .450 valve lift here's approximately what the engine will 'see' at various rpm using Rhoads Lifters vs other 'quiet' variable lifters and vs standard lifters:

                         Rhoads         Others        Standard
        At Idle         260  .425      268  .445      270  .450
        At 2000 rpm     265  .435      269  .447      270  .450
        At 3500 rpm     270  .450      270  .450      270  .450
        Vacuum with a slight load
        at 1000 rpm      11.0 hg        9.0 hg         8.5 hg

Rhoads Variable Duration Lifters are also anti-pumpups and can add as much as 500 more usable rpm to the top-end.

You can actually hear Rhoads Lifters work. They have a 'solid lifter' type sound all their own: a mild ticking sound at idle which tells you they're working to boost low-end torque, vacuum, and fuel economy. When the size of your cam is reduced for more low-end torque the valves seat at a slightly faster rate, producing a mild solid lifter sound. This sound gradually disappears as your rpm increases and your cam is restored to its full size for maximum top-end power.

Rhoads Lifters are completely safe for your engine because they operate with standard preload and no clearance even at low rpm. In fact your valve train should last longer with Rhoads Lifters. That's because valve lift is reduced at idle and low rpm by about .025. This lowers the stress on valve guides, springs, and cam lobe surfaces.

Number One for Over 35 Years - When you choose original Rhoads Lifters you've chosen a proven winner. They were the first variable duration lifters on the market and they continue to be the very best that money can buy. Their exclusive patented Accu-Groove design cannot be duplicated. With millions of Rhoads Lifters sold and over 100,000 satasfied customers including experts like Gale Banks and Louis Unser you know it's a product you can trust.

Rhoads Lifters will make the right cam for your vehicle even better, but they can't fix a bad cam selection. A Pro-Street cam will never be suitable for daily use even with Rhoads Lifters. Use the Accelerated Motion selection guides at the beginning of each engine parts page of the catalogue to select the best cam and lifter kit for your driving and then upgrade the lifter set with Rhoads Variable Lifters to get the best possible performance for economy, street, or strip.

ACCELERATED MOTION
PERFORMANCE PRODUCTS