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Comp Cams Cam Whine... is theres a way to inspect the cam before install?
i brought 2 cam kit from a well know company , they are grinded on comp cams cores..
both brand new with pushrods and double springs
the ls3 one has a whine , mostly on de acceleration ,and high rpm , its like a supercharger sound alike noise
the ls1 cam hasnt been installed yet , i dont want to work twice for a bad cam finish
question is > is there a way to verify if the cam has a good finish? what lobes are the main problem here? can i clean these imperfections myself ?
its not funny, to take the cam out just because poor QC
I can typically see it pretty quick in the right light if I am holding in my hand. I just had one the other day from another company who started grinding cams recently and the chatter was very obvious. I don't know how visible it would be in a photo if you tried to post it. Good luck.
I can typically see it pretty quick in the right light if I am holding in my hand. I just had one the other day from another company who started grinding cams recently and the chatter was very obvious. I don't know how visible it would be in a photo if you tried to post it. Good luck.
Can you describe what to look for? Do the lobes have like steps or something?
Went through this **** with Lunati cams twice in a row and got shafted. They refused to take return. All they'd do is take the cams back and repolish them and send them back.
Cam motion stepped up for me when that happened and I will be a customer for life because of it. It's worth the extra $50. You get a cam closer to the requested specs, better core material, and better polishing process. You're getting a ton for that extra $50.
if you're dead set on installing the cam, what you can do is fire the car up before you put the balancer and **** back on. At least you'll know if it whines before you do the rest of the labor.
Kind of like I did here after installing the cam motion cam.
Previous lunati ones. I bought the 2nd one thinking the 1st one was a fluke, and I was going to send back the first one. I didn't want to send it back before I had a cam, because then I would have had a bunch of down time with the car half torn apart.
Can you describe what to look for? Do the lobes have like steps or something?
It is very subtle but can be visible. It is the results of a little chatter from the grinding wheel. If you have been around machine work like working with a flat grinder you would recognize it. A good machinist would be able to spot it if you have one local to you. If you do, they may be able to polish it for you just to be sure. Also, Cam Motion will polish them for $25 +shipping. They have helped out other guys who had that problem.
I had a whine in my cam . Just got it out and sure enough , if you look close in bright sun light you can see the chatter that has been talked about . Mine was around the whole lobe . It looks like a waves of horizontal lines all the way around the lobe . Took my friend a few times of looking at it to see it . You have to look close .
Now im worried and kind of pissed. I bought a cam from Texas speed a while back. It was made by comp and looked just like this. The motor is still on a stand ready to drop in. I really don't want to buy the gaskets and seals to take this cam out again if I don't have to. If this whines im going to drive to comp and launch it out of a potato gun right back to them. I wonder how many other cams are out there like this. And not just for LS engines.
Now im worried and kind of pissed. I bought a cam from Texas speed a while back. It was made by comp and looked just like this. The motor is still on a stand ready to drop in. I really don't want to buy the gaskets and seals to take this cam out again if I don't have to. If this whines im going to drive to comp and launch it out of a potato gun right back to them. I wonder how many other cams are out there like this. And not just for LS engines.
Probably tons, but a lot of people don't care, so it doesn't get reported. I know people thought I was crazy for being annoyed by it and said to just keep it in.
I would think, from now on, guys would quit buying cams that aren't ground by Cam Motion. Obviously other cam grinders could care less about the customer, turning out garbage.
Wanted to expand a little on what I said a few days ago.
I've spent alot of time around machining in general. The posted lobe while not optimal, most likely meets the finish specification of the manufacturer.
Now let me say I'm not bias to one company or another and have used them all over the years.
At a guess the surface finish on that lobe is somewhere between 15-20ra and will most likely not cause a premature failure given the valve train being setup properly.
Optimal would be in the 5-10ra range. Surface grinding is a very complex process, not to mention I'm confident most cam manufactures are using older equipment ~50 yr old equipment at that.
The latest greatest cnc grinding machines from Gleason, Reishauser, Okuma to name a few are hundreds of thousand to millions of dollars. That's one heck of capitol request in today's world of manufacturing.
I have a BTR cam cut by Comp, and it sounds like I have a power steering pump whining - is that the sound? Didnt start till I stuck that cam in there.
But here's a question - should the sound disappear after the lifters roll on the lobes for a while and smooth them out?
69 , I just got a new cam from BTR as well . I requested that cam motion be used . After inspecting the cam and having one with the problem so I new what to look for . The cam motion cam has no signs of the what I call waves on it . So I expect good results .
01-19-2016, 07:19 PM
Comp Cams Cam Whine... is theres a way to inspect the cam before install? 
