Thread: Thumper Cams from Comp Cams--Anyone use one

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Comp Cams makes 3 hyd. roller cams called Thumper for Gen VI Big Block.
01-601-8
01-602-8
01-600-8
Am thinking about maybe one of these for my ZZ502.

Anyone out there tried one of these or if you have checked the specs of these cams what do you think???

i do not think much.. the way the re work the cam figures to get... the sound .....i more for building power.... i think they would make a good paper weight

In my opinion, anyone who builds for sound is a poser. If you build for power and the sound comes along as a side benefit, that's a whole different story.

I too am building a bbc motor replacement bullet for my daily driver and have looked at the Comp Cam line. This site (namely the two individuals above) have convinced me to use a hydraulic roller cam. I have the Comp Cam simulator loaded on my computer. The 601 Thumper is a 291 duration cam that makes 437 hp and 480 torque in my application. The 290 Magnum cam makes 497 hp and 516 torque. That is giving away alot of ponies for sound. Plus the Thumper cam cost more! Two negatives!!

If you guys knew my brother you would say its a perfect deal,lol. Some people have it in their blood but cant be trusted with that much hp..

Originally Posted by BigTruckDriver

If you guys knew my brother you would say its a perfect deal,lol. Some people have it in their blood but cant be trusted with that much hp..

Kewl, finally the mystery of who the poser cams were designed for is solved!!!!!!!!!!!!!!!!!!1

Thumper cams are made to sell, not to buy

Thanks for your comments, but I was hoping that someone out there might have actually had one of these in use to give some real world insight, instead of just opinions of what you think of these cams.

So does anyone have a Thumper cam in use???

Originally Posted by magrag

Thanks for your comments, but I was hoping that someone out there might have actually had one of these in use to give some real world insight, instead of just opinions of what you think of these cams.

So does anyone have a Thumper cam in use???

i put more cams in bbc then you have own or builtwhen i say i would not use one thats the real world thats more then a opinion......that insight... .sorry if you can not deal with it

Originally Posted by magrag

Thanks for your comments, but I was hoping that someone out there might have actually had one of these in use to give some real world insight, instead of just opinions of what you think of these cams.

So does anyone have a Thumper cam in use???

Cam selection takes so many other things into consideration.... what's the rest of your engine, SCR, DCR, usage, valve sizes, port sizes, etc, etc, etc.?>???????

The only way it would matter how someone else's use of a specific cam worked out for them is if your engine were identical in every detail.....

BTW, the opinions expressed on this thread come from countless years of experience making cars go fast......

Originally Posted by magrag

Anyone out there tried one of these or if you have checked the specs of these cams what do you think???

You asked about the specs and Pat told what his real world opinion was, so what is the problem?

http://www.youtube.com/results?searc...rch_type=&aq=f

Thumper is made parade cars not real drag race cars !

a friend of mine has the 291 in a 454...sounds good and pulls good but it is in a truck and it is not a 1/4 mile vehicle.Personally, I do not like them as they fall noticeably short on the torque on the desktop dyno. Granted the desktop is not the holy evaluater but it is based on an algorythym that is as accurate as the info that you input.
I talked to comp tech, and even they admit that thumpers are simply "noise makers". My suggestion is to have comp custom grind on a 108 lobe center if you want the noise. I guess it is all based on what your application is- performance or show. I agree with Tech. If you have the compression and performance, chances are, you will likely have the sound.
I am also a member of speed talk and I will say that Joe Sherman highly endorses the thumper series, off the shelf grinds. Joe is to speed talk as Pat and Tech are to club hot rod.

well you can get this off the self grind from ERSON CAMS RH298/306 @050 .238/246 621/621 108LC ON 108 O AV