comp cams mother thumper
#1
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Car: 91 Camaro RS
Engine: 355
Transmission: 700R4 RAPTOR
Axle/Gears: 373
comp cams mother thumper
I'm running the retrofit mother thumper roller cam, Just wondering if anybody else had tried this cam and what they thought of it. with my set up it has plenty of power. but I have low manifold vac. also using hughes 3000 lock up stall.
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Car: 92 T/A 'vert
Engine: Mild .040 over L98 4 bolt mains
Transmission: Mostly stock 700R4, 2600 Vigilante
Axle/Gears: LS1 3.42
Re: comp cams mother thumper
IIRC, those are all ground with pretty narrow LSA's which is, while good for top end power, not idle friendly.
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Car: 91 GTA
Engine: 377ci
Transmission: T56
Axle/Gears: QP Ford 9" 3.70s
Re: comp cams mother thumper
They are decent cams. They are a little upside down for most SBCs due to the fact that it has less lift on the exhaust side, they counter act that with duration, but SBCs need all the exhaust help they can get. The slobery idel is the marketing point. It gives guys who want the fair ground sound, "the sound" without making the rest of the power curve horrible.
#4
Re: comp cams mother thumper
Yep, i've heard a few engine builders use them with great success. Surprisingly enough the wide duration split and tight LSA work really well on most combinations. Most cams you'd see only have a few degs split, but these wide split thumper type cams create a broad powercurve, with hp holding on in the upper rpms after peak rpm.
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Car: 1983 Camaro Z28
Engine: 584
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Re: comp cams mother thumper
They always have sounded good in combinations but I would never run one since I could care less about sound. It's about what you want the car to do.
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Car: 91 Camaro RS
Engine: 355
Transmission: 700R4 RAPTOR
Axle/Gears: 373
Re: comp cams mother thumper
thats true, I've been through 3 hyd flat tap cams - comp,lunati, and crane blue racer which was a dam good cam 488 510 lift. let my bro inlaw drive took it past rpm and flatten lifter. so I decided to go w/ a better quality cam. the retofit was rite up my alley. I wish I had done some better reserch. they also make retrofit extreme and magnum single and dual pattern w/ better exh scaveging effect cam. if I do a tear down agian ( hope not ) I 'M gonna try'em
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