|
Big Mutha Thumpr:When COMP's new Thumpr hydraulic roller cams first came out, many thought it was just a noise cam, but we knew otherwise. With a long exhaust duration and a narrow 107-degree LSA, we saw a recipe for big street power. Retrofit hydraulic lifters are needed for engines not originally equipped with a hydraulic roller cam, so we also ordered the retrofit lifter kit for our BBC. Thumpr cams are available for small- and big-block Chevy, Ford Windsor, and small-block Chrysler. Three unique grinds are available in each engine family-we chose the biggest for our Rat Chevy (299/319 advertised duration, 243/257 at .050, .570/.554-inch lift, 107 LSA). View Related Article
|
|