Re: Comp Thumpr Cams.
[Re: Dunnuck Racing]
#1530141
02/06/14 06:19 PM
02/06/14 06:19 PM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
top fuel
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top fuel
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
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For just a few pennies more you can go with a Doug Herbert solid roller camshaft.They can spec you a great Hot Street type camshaft and nothing sounds better than a roller and get a Big Boost in power as well.They are very street friendly and about the Best Cam I have found for the $$$ I have put them in a lot of Street Cars.
PS I would not tell you this if I had not used them with good results myself.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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Re: Comp Thumpr Cams.
[Re: Brian Hafliger]
#1530142
02/06/14 10:15 PM
02/06/14 10:15 PM
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Joined: Jan 2012
Posts: 1,541
USA
hudsonhornet7x
pro stock
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pro stock
Joined: Jan 2012
Posts: 1,541
USA
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Quote:
Quote:
Anyone ever tried the Thumpr series cams from Comp. My Hemi came with one and I'm not sure what to expect. It looks like they give more duration to give them a choppy idle. This one is a hydraulic flat tappet and has a valve lift of .508int and .479ex and has advertised duration of 279°int and 296°ex. RPM range is 2000-5800 and calls for 9:1 compression and 2500 stall. I will be running a 4 speed and will be around 10:1 and a different crank is in the works to grow it to a 477. Going in a street car. Anyone have any thoughts on the subject? thanks
Put it in straight up, it will work great!
Brian
I have heard quite alot about these cams. Some claim they are all sound and no performance, some claim great performance and sound. Others claim they were originally designed for endurance racing, I believe?
Although I like the way these cams sound, are you giving up much power and torque with these?
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Re: Comp Thumpr Cams.
[Re: mickm]
#1530144
02/08/14 04:07 AM
02/08/14 04:07 AM
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Joined: Mar 2008
Posts: 860
lancaster,california
johnnycuda
super stock
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super stock
Joined: Mar 2008
Posts: 860
lancaster,california
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I have one in my 360,sounds really good and I still have the lame exhaust manifolds in my '66 Barracuda.
I was originally looking at a Extreme Energy cam but when I was working at the speed shop still our sales rep at Comp who happens to be the head tech guy,said the Thumpr cam makes more peer than the Extreme.
1970 'Cuda,Lime Light,499 Indy S/R's 10.70's @125,street driven ALOT!
1966 Barracuda 360,now a 5spd,Hemi Orange,Hot Rod Air,
New daily driver-2003 Ram 2500 Cummins 5.9
'69 Valiant 2-dr, sleeper!
New project---1938 Dodge truck, plan is a 360 with a A500, AC, Calvert rear susp., rack and pinion front with coils.
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Re: Comp Thumpr Cams.
[Re: johnnycuda]
#1530145
02/08/14 04:40 AM
02/08/14 04:40 AM
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Joined: Jan 2003
Posts: 5,485
SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,485
SoCal
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They make very good power for a mild lift camshaft...very wide spread of power and sound great.
Are there better cams, yeah probably but they work good in the engines I've run them in and you don't need an expensive rocker arm if you use the thumpr.
Brian Hafliger
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Re: Comp Thumpr Cams.
[Re: Brian Hafliger]
#1530146
02/08/14 10:06 AM
02/08/14 10:06 AM
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Joined: Feb 2005
Posts: 4,313
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,313
Prospect, PA
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Quote:
Quote:
Anyone ever tried the Thumpr series cams from Comp. My Hemi came with one and I'm not sure what to expect. It looks like they give more duration to give them a choppy idle. This one is a hydraulic flat tappet and has a valve lift of .508int and .479ex and has advertised duration of 279°int and 296°ex. RPM range is 2000-5800 and calls for 9:1 compression and 2500 stall. I will be running a 4 speed and will be around 10:1 and a different crank is in the works to grow it to a 477. Going in a street car. Anyone have any thoughts on the subject? thanks
Put it in straight up, it will work great!
Brian
This recommendation makes sense to me, but I'm curious on what your reasoning is?
Is it because it already has enough CR / put the power higher in the range where the hemi wants it, or because it is a 4 speed?
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