Think about it a bit the whole concept is to change the exhaust duration timing so it idles like a much larger cam, its the lopey sound, not the the volumetric efficiency or power potential that was the main criteria. The WHOLE THUMPER LINE of cams is a BAD JOKE in my opinion even comps tech guys won,t suggest them if they are being honest if your asking about making the best possible potential power from any given duration. Truck has no low end and we are wondering if it is a tuning issue or is this cam a joke. Is this possible? I know it has a large overlap. The claim on this cam is that it gives you a big cam sound without effecting drive ability. Sounds really good but is very weak as far as power goes. My brother bought an old truck (sorry, not a Z), and we think it is a stock 350 with this cam in it. Chev C10 with Comp Cams Thumpr 279 - Stock 350 SBC. I personally don’t care for the idle characteristics of those cams, but it’s what the owner wanted. It made surprisingly good power, and hung on quite well. Ootb E-Streets, flat tops, right about 10:1, 1-5/8 headers, 1.5 rockers, A/G intake. There are better performing camshafts out there for sure, but they may or may not sound as good as youd like.Īm wondering if anyone has any experience with this cam. thumper cam-sbc - undefined, undefined, undefined and many more movies and videos. We had a very bread n butter 350 with the middle Thumpr cam (235/247-107) in it on the dyno not long ago. Sorry for the long rant, but I just wanted you to keep this stuff in mind, cause you gotta be sure of what you want your engine to do. The best performing cam for your engine may perform just might not sound as good.
![thumpr cam 350 on dyno thumpr cam 350 on dyno](http://site.brenspeed.com/forumpictures/detroitrockerdynograph.jpg)
This cam may sound great in your engine but not perform great. Itll sound good, but itll suffer in other areas. These cams work the same way.Īll the effort and energy invested in designing these camshafts is put towards making them sound a particular way. These expressions have come about because of the fact that You cant actually have your cake and eat it too.while standing on greener grass(once you walk on the grass enough it starts to die). Im sure you have heard all the old expressions like "the grass is always greener on the other side" or, "you cant have your cake and eat it too". Nothing wrong with that if this is your goal, just dont expect one of these cams to run as well as others. It just wont run as good as it could(which may be a non issue for you if your just after the wow factor). In addition, there are various lifter types available ranging from Hydraulic Roller to Solid Flat Tappet. You will hear it coming, and it will be an attention getter at the car shows. Within the COMP Cams camshaft family, there are several different types of camshafts available for most popular domestic engines ranging from the Xtreme Energy Cams to Nitrous HP Cams. If your one of those guys, than these camshafts are for you.
![thumpr cam 350 on dyno thumpr cam 350 on dyno](http://www.grumpysperformance.com/bootlegl.png)
its all just a marketing ploy! These are designed/marketed for the crowd that wants a real rumpity sound for cruise nights and stuff like that, but otherwise, dont care how it runs.
#Thumpr cam 350 on dyno mods
They're available in three sizes for each application-the Thumpr, the Mutha' Thumpr, and the Big Mutha' Thumpr-and are simple drop-in units that don't require any other engine mods other than a check of valvespring condition, which would be the case with any cam swap.mild street engines with these cams that are loping a lot and sounding good, but have crappy power and performance.
![thumpr cam 350 on dyno thumpr cam 350 on dyno](https://www.onallcylinders.com/wp-content/uploads/2020/06/05/ASK-20-05-01.jpg)
Thumprs are available for small- and big-block Chevy, small-block Ford, and small-block Chrysler engines. It's a pretty simple science, actually, and while logic would have you believe power is lost due to this overlap, results have shown the performance is actually up over similar camshafts due to COMP Cams' innovative lobe designs. This tightening creates more overlap between exhaust and intake events and the wild thump gearheads love. For those who aren't familiar with the Thumpr, it's a COMP camshaft design that delivers true high-performance engine sound by "tightening" the lobe separation angle of the camshaft. In actuality, our focus was not only on achieving substantial gains in horsepower and torque but to also experience for ourselves the features of COMP's Thumpr camshafts, as we've been dyin' to hear its signature high-performance lump-not exactly a scientific endeavor, but a fun diversion for a hot rodder.