Longevity of Comp XE/Lunati Voodoo Flat Tappet cams
#1
Longevity of Comp XE/Lunati Voodoo Flat Tappet cams
I'm curious about how many of you have honestly put a good number of miles on aggressive ramp hydraulic flat tappet cams such as the Comp XE or Lunati Voodoo line without any issues. I'm not talking 4 or 5k miles here, I'm talking about daily driver type miles. Not really engine specific here but do tell what engine you have. Again, Be honest. And please , no lectures on flat tappets and today's oil...and how rollers are better...etc...etc...we all know flat tappets are gonna wear more and faster.
I'm in no way arguing the fact that these aggressive cams should make more usable power and can actually "crutch" low compression engines but Personally it seems to me that the ramps are just too intense to offer any real longevity. It seems all I ever see is people saying that they've only put about a few thousand miles on these.
I've had great success with other comp cam lines as well as Howard's cams and Crane, all of which had ramps of lower hydraulic intensity (lazier, so to speak) .
Soo....If you've ran up a bunch of miles on one of these cams without issues let us know.
I'm in no way arguing the fact that these aggressive cams should make more usable power and can actually "crutch" low compression engines but Personally it seems to me that the ramps are just too intense to offer any real longevity. It seems all I ever see is people saying that they've only put about a few thousand miles on these.
I've had great success with other comp cam lines as well as Howard's cams and Crane, all of which had ramps of lower hydraulic intensity (lazier, so to speak) .
Soo....If you've ran up a bunch of miles on one of these cams without issues let us know.
#3
[QUOTE=mark a.;18646051]Any flat cam should last the life of the engine if it was put in right and had regular oil changes with the right oil. I have never noticed a problem.[/
I don't share your theory on "Any" flat cam lasting the life of the engine but that's just our theories and not what I asked. So...how many miles have YOU PERSONALLY put on a compXE or Voodoo cam?
I don't share your theory on "Any" flat cam lasting the life of the engine but that's just our theories and not what I asked. So...how many miles have YOU PERSONALLY put on a compXE or Voodoo cam?
#4
#5
I'm not expecting anything....I'm simply asking how many miles have you put on your XE or Voodoo Flat tappet?. Just a simple question
#6
#7
Thanks for that reply gashog. So does the current 10k mile build have an XE cam? If so what kind of engine and which cam exactly?
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#8
It's not just the cam's material that's the problem. It's the lifters too. Many aren't machined properly, especially the faces. If I was building a daily driver with a flat tappet cam(which I wouldn't now but go roller) , I would steer clear of the so called aggressive ramp rate cams to start with.
#9
It's not just the cam's material that's the problem. It's the lifters too. Many aren't machined properly, especially the faces. If I was building a daily driver with a flat tappet cam(which I wouldn't now but go roller) , I would steer clear of the so called aggressive ramp rate cams to start with.
#10
This is all correct, I have found new lifters to be not ground flat or have improper RA finish. Even found some that were a harder material than the camshaft and it just ate the cam. Last two builds I used old lifters that I re-finished and had the old cam re-ground and have been taking oil samples to verify the wear rates and so far so good.
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This is something I've been wondering about as well, considering I've been thinking about using them in two of my next builds. Out of the ones that are failing early, were they used with the valve springs recommended by the manufacturer for that cam, or did they just use the springs that were already on the heads and were possibly too stiff for a fast ramp rate cam?
This also makes me wonder if using a beehive (progressive rate?) spring would help with the longevity of the cam. Here's a quote and the link to an article I was just reading. "It just stands to reason that the smaller coils at the top of the spring don’t require as much force to get the valve moving quickly, much quicker than conventional style springs. The higher rpm potential equates to better durability and performance." https://www.enginelabs.com/engine-te...-work-for-you/
This also makes me wonder if using a beehive (progressive rate?) spring would help with the longevity of the cam. Here's a quote and the link to an article I was just reading. "It just stands to reason that the smaller coils at the top of the spring don’t require as much force to get the valve moving quickly, much quicker than conventional style springs. The higher rpm potential equates to better durability and performance." https://www.enginelabs.com/engine-te...-work-for-you/
#15
This is something I've been wondering about as well, considering I've been thinking about using them in two of my next builds. Out of the ones that are failing early, were they used with the valve springs recommended by the manufacturer for that cam, or did they just use the springs that were already on the heads and were possibly too stiff for a fast ramp rate cam?
This also makes me wonder if using a beehive (progressive rate?) spring would help with the longevity of the cam. Here's a quote and the link to an article I was just reading. "It just stands to reason that the smaller coils at the top of the spring don’t require as much force to get the valve moving quickly, much quicker than conventional style springs. The higher rpm potential equates to better durability and performance." https://www.enginelabs.com/engine-te...-work-for-you/
This also makes me wonder if using a beehive (progressive rate?) spring would help with the longevity of the cam. Here's a quote and the link to an article I was just reading. "It just stands to reason that the smaller coils at the top of the spring don’t require as much force to get the valve moving quickly, much quicker than conventional style springs. The higher rpm potential equates to better durability and performance." https://www.enginelabs.com/engine-te...-work-for-you/