Our Patented Original Rhoads Variable Duration Lifters became famous for increasing low-end torque, engine vacuum and idle quality on engines equipped with performance hydraulic cams, while maintaining maximum top-end power. Many satisfied customers also reported better fuel economy and improved emissions quality, allowing them to pass emissions testing when they otherwise would have failed. Orginal Rhoads Lifters reduce lift and duration at idle by approximately .010" to .020". Duration is reduced by approximately 10 to 15 degrees. Total lift and duration are restored at approximately 3500 rpm. Typical vacuum increases range between 1 to 3 inches. They may be used with either adjustable or non-adjustable valve trains. They are designed for use with high-performance street, marine or racing applications. Original Rhoads Lifters with their legendary "ticking" at idle, sound similar to solid lifters. Oil viscosity, valve spring pressure and engine temperature all combine to affect the total leak-down of the lifter at idle. Therefore total leak-down is only approximate. Original Rhoads Lifters are also anti-pump-up for higher rpm revs. A number of world records on land and water have been broken using Original Rhoads Lifters.
"I'm very impressed with your lifter. My only thought now, is that I could have gone with a stronger cam. Many thanks for a fine product!"----Byron Boxtwick, Woodbridge, CA
San Manuel, AZ 85631
Phone: (520) 229-9375
Fax: (520) 385-4596
CustomerCare@rhoadslifters.com