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Old 03-08-2007, 06:17 PM
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xtreme energy vs voodoo

does anyone know if there is a big difference in the two. i know there is diff profiles but is there a big difference besides the price.

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Old 03-08-2007, 06:27 PM
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Compcams and Lunati are both well respected cam grinders. Consult with the tech guys at either company for a recommendation of the best cam for your application.
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Old 03-08-2007, 07:02 PM
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The Voodoo series is supposed to be alot more valve train friendly and still have loads of HP like the Bracket masters series... They are a little newer designs than the Comp Extreme series but they too are for sure a good design...
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Old 03-08-2007, 09:20 PM
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The voodoo series are, as far as I know, a flat tappet design only...They don't offer roller options. The Extreme Energy can be had in both flat tappet and roller design.
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Old 03-08-2007, 09:38 PM
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I dont know if it means much but the voodoo cams are on a 112lsa and the xtreme energy have 110lsa
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Old 03-08-2007, 10:45 PM
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They're both fine lobe designs. Make sure that you use the recommended springs with either of them.



Larry
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Old 03-09-2007, 03:29 AM
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xtreme energy vs voodoo

The Voodoo line is available in a roller type.Both of these cam series were designed by the same man,the Voodoo was probably just a bit better thought out.If you go roller,the Voodoo comes on a billet core whereas the Comp XE comes on an austempered ductile cast iron core,unless special ordered.
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Old 03-09-2007, 08:26 AM
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Does anybody have any comments on valve train noise with XE cams? On another forum, several people commented that their XE cams made a lot of noise in their SBC's... something about the grind was very steep...
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Old 03-10-2007, 05:06 PM
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Quote:
Originally Posted by Big Mouse
Does anybody have any comments on valve train noise with XE cams? On another forum, several people commented that their XE cams made a lot of noise in their SBC's... something about the grind was very steep...
My Comp XE284H10 is noisey (but not objectional to me) at idle in my SBC. Especially after the motor is fully warmed up. Changing to thicker oil 15w40 Shell Rotella T helped. The oil pressure is only 20- 25lbs at idle, hot.
Stock oil pump. The oil pressure at idle makes a difference.
I also run a lot of valve spring pressure. 130lbs seat pressure. This all affects the lifter bleed rate at idle. A fast bleed racing lifter will be even more noisey at idle. The motor was set up for a solid lifter cam but I wanted to try this hyd first.
I've had more than 1 person ask if I had a solid cam in it.
Other than that, it runs fine.
If you want a Hydraulic cam that runs quiet at an idle get a Crane Power Max-HMV hyd cam. The comp Extreme series cams really take the valve lift rate to the max. The downside is a little more lifter noise at idle.

Last edited by F-BIRD'88; 03-10-2007 at 05:27 PM.
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Old 03-10-2007, 08:27 PM
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F-Bird.....question, why is it that the XE cam is more noisey? Is it the faster ramp angles or what. I,ve got an XE262H-10 iin my 331" sbc but its unfired so can't compare.
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Old 03-10-2007, 08:49 PM
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"Is it the faster ramp angles" The short answer is yes.
In order for a Hyd cam to run quiet there is a definate limit to how fast you can seat the valve or it will make noise.

The Crane HMV series of cams was designed to be a fast valve action but stable, powerfull series of lobes that run quiet at idle.

The Comp Extreme series take it to the max. They need premimum valve springs and specific spring pressure. The penalty is valvetrain noise at idle.
We won't get into cam and lifter service life or breakin failure. There is no free lunch.

You cannot compare the two by their advertized durations. They are speced at different lifter heights. .004" vs .006" The Comp XE cams have a little shorter (a few degrees) seat timing thou.
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Old 03-10-2007, 08:55 PM
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So then its basically the valve rapidly closing against the seat that makes the noise? You think theres a longivity problem with this cam? I,m running Edelbrock alum. heads, they claim 120# on the seat and 320# open @ 1.219'" And I run 15w40 Rotella in my Powerstroke, I was looking at all the different oils but I keep coming back to Rotella for this engine.

Last edited by 327NUT; 03-10-2007 at 09:02 PM.
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Old 03-10-2007, 09:07 PM
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Quote:
Originally Posted by 327NUT
So then its basically the valve rapidly closing against the seat that makes the noise? I,m running Edelbrock alum. heads, they claim 120# on the seat and 320# open @ 1.219'"......you see any problems with that?
Its not a problem. My motor has more spring pressure than it needs and about the max you want for a street hyd flat tappet cam. 120lbs seat pressure is just right. My oil pressure is a little low at idle when hot. That contributes. The lifter noise is mild. Could easily pull the oil pan and shim the oil pump pressure spring for 10 more psi oil pressure and get quieter lifters at idle. Not at all like Rhoads lifters. I think you'll be fine. Get normal hyd lifters. Hi rev or fast bleed lifters are not nessessary.
Got to put it all in perspective. I've heard Ford 5.0 litre EFI injectors that make more noise @idle.
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