These Thumpr series camshafts feature a cutting-edge hydraulic roller design that delivers a substantial power increase over identical hydraulic flat tappet grinds without sacrificing reliability or ease of maintenance. Thumpr camshafts are available in three different grind profiles each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. Mutha Thumpr 227/241 Hydraulic Roller Cam for GM LS GEN III/IV. COMP CAMS BIG Mutha Thumpr Camshaft Kit w Gear Drive for Chevrolet SBC 350 400 - 405.95. I have the big mutha thumpr 246/257 50 duration for my 350 and its coming out this fall when I get my other build done. I dont like the agressive overlap that these cams have and they are a pain to tune. They give you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Great for TPI and Mini-Ram equipped 350-383 Engines. Hello I have the next cam up but its the hydraullic roller version. The lobe profile and grind characteristics of these new Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the cams. ![]() The Thumpr camshafts are a new series of retrofit hydraulic roller camshafts designed for use in engines that were originally equipped with flat tappet camshafts. ![]() In fact, one of the most frequent questions fielded when customers call our tech line is, "what camshaft will give my car that mean-sounding idle?" In an ongoing quest to provide you with the performance and sound you demand, COMP Cams' engineering team proudly introduces the Thumpr series of camshafts. 50 HIGH PERFORMANCE STREET/STRIP CO 12-601-8COMP Cams is bringing the musclecar sound back and it's nastier than ever! 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. ![]() I like the cam, even with the 3:08 gears in my Corvette (3100 lbs).COMP CAMS MUTHA THUMPR 235/249. It also kills vacuum, I think on its best day it might make 9 inches.Ĥ) Everyone, and I mean everyone, gets that stupid grin on their face when they hear it run. stock 4 bolt main truck 350 with Vortec heads, air gap intake, CR is 10.5:1 and it sounds excellentģ) It's an 108 centerline cam, you expect cadillac torque? I honestly don't think it gives up that much bottom end, but oh good heavens, when it hits 2800 rpm, hang onto your girdle, it'll pull your panties right off all the way up to redline. now my problem is keeping clutches in the car.Ģ) I have the next-to bottom of the page cam. it sucked, it was like a light switch, and idling down the freeway, it wouldn't make enough pressure (tc) to keep it in 3rd gear. That said, the first itineration of this set up was with a turbo 3 stall. I have a 4 speed, so I couldn't care less. ![]() sounds like I'm the only on running their Thumpr cam.ġ) stall depends on which cam you buy (there's like 5).
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