What's up with Comp Cams ?
04-28-2013, 09:03 PM
#201
Howards Cams makes a "direct lube" lifter with a tiny hole where it contacts the cam lobe. This directs additional oil directly onto the lobe/lifter contact point. They have a mechanical roller cam with a hole to lube the bearing which in turns gets extra oil on the lobe.
I wonder if additional oiling of the lobe would reduce the cam problems discussed here. Aside from the extra lubrication, it'll also reduce (carry away?) some of the heat developed between the roller and the lobe.
I say this because it almost looks like the affected cams have lost their surface heat treatment.
I wonder if additional oiling of the lobe would reduce the cam problems discussed here. Aside from the extra lubrication, it'll also reduce (carry away?) some of the heat developed between the roller and the lobe.
I say this because it almost looks like the affected cams have lost their surface heat treatment.
04-28-2013, 09:11 PM
#202
SO, as per newbie NAVYBLUE (welcome to LS1tech!), 1,000 PPM of zinc in the oil and the cats are affected at 50K miles and 800 PPM 100K.
That's not too much of a trade-off to ensure better lubrication.
I'm just hoping to hear more details and testing on the Lucas EOS.
04-28-2013, 09:33 PM
#203
The sky is falling!
Just ordered my OWN PERSONAL comp cams camshaft Thursday for my motor in my race car. My boss Jonathan's camshaft for his 14:1 434 c.i. nitrous motor showed up Friday as well. It's a solid roller cam and will be spun 8,000rpm on the regular.
I will put my faith in their products until I find a first hand reason not too.
Just ordered my OWN PERSONAL comp cams camshaft Thursday for my motor in my race car. My boss Jonathan's camshaft for his 14:1 434 c.i. nitrous motor showed up Friday as well. It's a solid roller cam and will be spun 8,000rpm on the regular.
I will put my faith in their products until I find a first hand reason not too.
04-28-2013, 09:45 PM
#204
One thing I would like to add that I feel is important. A 3/8 pushrods will work in stock heads. Look up rigidity test of 5/16 pushrods vs 3/8, it's a huge difference in stiffness. Much more so than .080 wall vs .100 wall thickness. Always run the biggest diameter pushrod you can. Bigger diameter pushrods can be purchased from comp in 3/8 size for around $100. You pay a premium for thicker wall pushrods. Most aftermarket heads will fit an 11/32 pushrod but you should always double check. I've seen spintron test of 5/16 .080 wall pushrods and on some lobes they start to look like a spaghetti noodle above 6000 rpm. Always run the stiffest pushrod you can there is no downside. Valve control is determined by the weight on the nose of the rocker on the valve side and has little to do with pushrod weight.
04-28-2013, 10:36 PM
#206
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I suppose that's true.
SO, as per newbie NAVYBLUE (welcome to LS1tech!), 1,000 PPM of zinc in the oil and the cats are affected at 50K miles and 800 PPM 100K.
That's not too much of a trade-off to ensure better lubrication.
I'm just hoping to hear more details and testing on the Lucas EOS.
SO, as per newbie NAVYBLUE (welcome to LS1tech!), 1,000 PPM of zinc in the oil and the cats are affected at 50K miles and 800 PPM 100K.
That's not too much of a trade-off to ensure better lubrication.
I'm just hoping to hear more details and testing on the Lucas EOS.
http://www.gf-5.com/uploads/File/SAE_2007-01-1990.pdf
04-28-2013, 10:49 PM
#207
How many ls guys truly degree their cam in, how many check seat pressure on their valve springs at regular intervals? Installing a cam "straight up" is not how you degree a cam but is the standard answer. What always gets me is the guys who want a custom cam with specific valve events yet they don't degree their cam to those custom valve events that they paid extra for. Guys just want to slap **** in and run it 50,000 miles because you can find 10 other guys who have "no problems" with their brand xyz springs yet you won't find any Guys with facts posted on seat pressure of their springs with that amount of miles. Valvetrain instability will kill the best parts out there in a hurry. Hell I even see a lot of guys posting dyno graphs where you can clearly see valve float starting around 6000-6200 rpm and they have no clue there is a problem. It's honestly not their fault because 10 guys on tech said it would be ok.
04-28-2013, 11:22 PM
#209
That's the problem with a large amount of ls guys. They read one thing here or there and opinions quickly become Internet facts. Take a sharpie and check how much clearance there truly is, do it for yourself. No offense to you but from what I've seen ls guys are so spoiled with online information they have become a group of very lazy car guys. This really is not anyone's fault who is just getting into the game, but now a days guys can make power with very little automotive knowledge. That is probably the root cause of many cam failures out there.
BTW, Brian Tooley offers a 3/8" that's very reasonably priced if you don't need a custom length. I believe it's $105 for the set.
04-29-2013, 08:00 AM
#210
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That's the problem with a large amount of ls guys. They read one thing here or there and opinions quickly become Internet facts. Take a sharpie and check how much clearance there truly is, do it for yourself. No offense to you but from what I've seen ls guys are so spoiled with online information they have become a group of very lazy car guys. This really is not anyone's fault who is just getting into the game, but now a days guys can make power with very little automotive knowledge. That is probably the root cause of many cam failures out there.
How many ls guys truly degree their cam in, how many check seat pressure on their valve springs at regular intervals? Installing a cam "straight up" is not how you degree a cam but is the standard answer. What always gets me is the guys who want a custom cam with specific valve events yet they don't degree their cam to those custom valve events that they paid extra for. Guys just want to slap **** in and run it 50,000 miles because you can find 10 other guys who have "no problems" with their brand xyz springs yet you won't find any Guys with facts posted on seat pressure of their springs with that amount of miles. Valvetrain instability will kill the best parts out there in a hurry. Hell I even see a lot of guys posting dyno graphs where you can clearly see valve float starting around 6000-6200 rpm and they have no clue there is a problem. It's honestly not their fault because 10 guys on tech said it would be ok.
How many ls guys truly degree their cam in, how many check seat pressure on their valve springs at regular intervals? Installing a cam "straight up" is not how you degree a cam but is the standard answer. What always gets me is the guys who want a custom cam with specific valve events yet they don't degree their cam to those custom valve events that they paid extra for. Guys just want to slap **** in and run it 50,000 miles because you can find 10 other guys who have "no problems" with their brand xyz springs yet you won't find any Guys with facts posted on seat pressure of their springs with that amount of miles. Valvetrain instability will kill the best parts out there in a hurry. Hell I even see a lot of guys posting dyno graphs where you can clearly see valve float starting around 6000-6200 rpm and they have no clue there is a problem. It's honestly not their fault because 10 guys on tech said it would be ok.
and I am not just throwing parts together if that was the case i would've been DONE! Its not and im still in the parts acquiring/research stage. But when you start reading so many threads everything starts to blur so thanks for the heads up. There is alot of Good READ in this and many other forums and hope I can eventually get things together.
04-29-2013, 08:08 AM
#211
Back to the original question I can say I have had nothing but great help and support from the guys at Comp Cams. I had catastrophic failure and ended up rebuilding my engine. Gabriel and Brad have been very helpful and supportive through the process. Excellent customer service bar none!
TT
TT
04-30-2013, 06:23 AM
#212
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There is plenty of proof. What I've found is some victims don't want to bash the vendor that sold the cam, or put them in the middle of it. Recently several guys lost new engines BC of comp cams. Sometimes you have to personally know the people to see the proof firsthand. However, I had one years ago and I didn't have trouble with it. I'm running a can motion now. If vendors are changing suppliers pay attention, BC they would not do that unless there was a guaranteed problem somewhere.
