Thumpr Series cam and lifter kits deliver a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance. Thumpr camshafts are available in different grind profiles each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range.

This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Is it a thumper, or the mutha or the big mutha thumper if its mutha or big mutha, 5' may be it 69 X-44 base coupe, ZZ4, 16lb nodular flywheel, Center force DF clutch + PP, Holley 600DP, Hooker super comp 1 3/4 ceramics, 2.5' dual exhaust w/ X-pipe, flowmaster 40 series mufflers. The lobe profile and grind characteristics of these 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.

Can the computer be written/flashed to handle such a cam It doesn't sound like the Thumper series cams are computer grinds. In an ongoing quest to provide you with the performance and sound you demand, COMP Cams engineering team proudly introduces the Thumpr Series cam and lifter kits. Can a Comp Cams Mutha Thumpr hydraulic roller be used in a Vortec small block still using fuel injection I know the limitations of the heads, but aside from that. Here's a taste of what the cam sounds like.COMP Cams is bringing the muscle car 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'm guessing the 600 would probably be more than adequate for what you want but get more opinions than mine. Alot of people say these are just a noise cam but they are more than just a gimic. Here are the three Thumper Cams for comparison. These are links to the arcticles if anyone is interested. As for the vaccuum all I can say is it hasn't been an issue for me but i am running a smaller dual diaghram booster also. I got what I wanted A mean sounding car that goes like H*LL and is still very streetable. Could I have gotten the same/more power for less money? Maybe. Wonder what it would make with a bigger carb and some matching? Could I have made more power with another cam? Probably. Even thou I am still running a modest Holley 750 w v/s ($50 second hand)dyno numbers were 553/530+. I really enjoy the sound this thing makes and I assure you this thing hits a mean lick. I basicly followed the Iron Man build but substituted Forged JE Pistons for the KB hyper's (same specs) and used the hydrallic roller used in the Howitzer build. My build is a cross between two builds done in PHR.

Big mutha thumpr cam 350