Real car guys understand that their love of this hobby isn’t just about raw dyno numbers. It is about the feeling of power, the thrill of raw acceleration and the overall experience of being in a great car or truck. That’s why the sound of a great car is just as important as its looks.
“That great sound at idle is something we had lost for a while,” COMP’s Rick Sparks says. “It went away with the fuel-injected cars, but we are getting it back. People miss it, and that is what the Thumpr Camshafts are all about. They give you good power, but they also come with a great sound.”
Sparks adds that if COMP Cams ever produced a camshaft lineup that was its customers’ idea, then this would be it. He tells the story of speaking with a customer at a car show who told him about the cam he was looking for. “He rode in to talk to us because he knew we’d be there and he wasn’t able to find what he wanted. He said he didn’t care about making more power, he just wanted ‘One of those mothers that thump.’
“So I went back to our facilities and told (cam designer) Billy Godbold exactly that. He needed to make us a ‘mother that thumps,’ and that was it.”
The result, of course, is the Thumpr lineup of camshafts. For most engines you have your choice of three levels of “thump.” First, there is the Thumpr, followed by the Mutha Thumpr, which usually has both more lift and duration, and finally, there is the Big Mutha Thumpr which pushes all the limits.
“The best part is you aren’t giving up power to get the sound,” Sparks adds. “We were prepared to give up a little power at first to get the sound we were looking for, but Billy Godbold found a way around that.”
“He based the design of these Thumpr Cams on lobes he developed for the Prototype cars racing in the 24 Hours of Daytona. If you think about a Daytona Prototype car, it’s not on ‘Kill’ all the time because the car has to last 24 hours. You are going to have driver fatigue, and you have to protect the valve train in the 18th hour of the race if he misses a shift or makes some other mistake. But you still have to make good power because this is still racing, after all.
“The technology used in the Thumpr line of camshafts is almost the same,” he continues. “They have a big overlap to give you that good sound, but they also make great power without being real harsh on the valvetrain. They have a nice, wide horsepower and torque curve. And they are very forgiving when it comes to revs. That makes them good for cars that will be on the street because they aren’t going to be breaking springs or pounding the valve seats. It’s just a nice, dependable cam with a great, aggressive sound and attitude.”
Thumpr™ Camshaft Features - Available in both hydraulic flat tappet and hydraulic roller designs for SBC & BBC, Ford Windsor & Chrysler Small Block
- A multitude of available kits -including the Thumpr™-exclusive "GK" gear drive kits to suit every budget and application
- Three unique grinds for each engine to fit all cruising & street performance needs
- Long exhaust duration and other grind characteristics produce a powerful, hard-hitting exhaust note
- Designed for use with the latest in valve train component advancements such as Beehive™ Valve Springs, Pro Magnum™ Roller Rockers and Magnum Pushrods
Linear Mode
