While CompCams does not provide side by side dyno comparisons, heres a quick one I put together. The Thumpr results also include the addition of a 750 Holley to the set up, while the "stock" results use a smaller 650 Holley.īut even that doesn't give you a very good picture of the Thumpr in comparison to other cam grinds. The only trouble is that you need to read the specs closely to discover that those numbers don't compare apples and apples. In fact, at first glance these results look to be promising, about a 35 hp to 55 gain for a 350 crate engine at 5600 RPM depending on the Thumpr model chosen. In all fairness, I think the above quote is probably just a bit of poor ad writing because the dyno test results posted by CC do show a horsepower gain over a stock cam.
Mother thumper cam 350 install#
".Maximizing the rough-idling characteristics.without negatively impacting the power output.? To my knowledge that's the first hi-perf cam grind I've ever seen whose claim to fame is that it doesn't actually reduce your engine's horsepower when you install it. "The reason that the new Thumpr Camshafts have such an aggressive exhaust note is that the lobe profiles and grind characteristics chosen by the COMP Cams' engineers produce a combination of early exhaust valve opening, long exhaust duration and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the cams without negatively impacting the power output or streetability."
Notice here that the selling point is not torque or horsepower as compared to other cams.
Mother thumper cam 350 series#
In fact, one of the most frequent questions fielded when customers call our CAM HELP tech line is "what cam will give my engine a mean-sounding idle?" In response to this popular demand, the COMP Cams' engineering team proudly introduces the Thumpr series of camshafts." "Let's face it, few things serve to grab our attention at a car show or cruise night more than a car with a thumping, high performance idle. They follow that with an explanation of their motivation in creating this particular cam series. The tag line for the cam (as shown here in CC's advertising) is "BE LOUD. Rightly or wrongly, Comp Cams has adopted a marketing strategy for this cam series that emphasizes the bark over the bite.
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