came lobes discussion
came lobes discussion i just recieved my f13 cam and the lifter lobes have tool marks that run in the same direction as the roller would run. Is this normal or are they supposed to be as smooth as the cam bearing sections
The lobe surface should be very smooth with no visible tooling marks. You must read this.https://ls1tech.com/forums/generation-iii-internal-engine/461106-new-pics-old-f13-carnage.html
Originally Posted by gr8one99SS
i did read that and they can be felt with my finger tips what should i do?
The F13 is a Futral Motorsports design isn't it. Call him before returning it and tell him to look at this thread. He will give full refund or exchange.. http://www.ihearyou.com/~tony/pictur...rs/page_01.htm
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wow i just took another look at my cam and it looks just like the one in the pictures of the other thread.I really dont know if that would cause the bad lifter,at least i hope not,they just seem to small to do any damage,and i think i whine would be causeed by a straight cut,not a diagonal cut.
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I wouldn't hesitate to buy a futral cam, but I would definately get in touch with allan to find out about getting a smoother one if you get one with ridges. I feel that the tooling marks on the cam act effectively like a file. My ridges are easily felt with your fingernail.
After emailing allan, he offered to take a look at the cam and possibly have it replaced.
After emailing allan, he offered to take a look at the cam and possibly have it replaced.
same here , i hear great things about the performance and do not want a diffrent cam just a smooth f13. allen sent me a pm which said to send it back to have a new one reground with a better finish. Thanks Allen i should send it back today or tommorrow at the latest.
Those pictures of the tooling marks on the lobes will not cause lifter failure. A lobe does not have to be completely smooth in fact a little texture to it is better. These lobes are being used in other engine familys with NO issues. The gauling of these lobes and lifter rollers are specific to the the LS1 family of engines.
If anyone wants a good education in cam lobes and what will and won't work I will be more then happy to give you the number of Demos Cams. Steve has 25 years experience in grinding cams, Hands on. He has ground everything from aircraft, to Cup camshafts. He does not have a dog in this hunt so he can give you an expert unbiased opinion.
There is absolutely nothing wrong with Allan's cams.
If anyone wants a good education in cam lobes and what will and won't work I will be more then happy to give you the number of Demos Cams. Steve has 25 years experience in grinding cams, Hands on. He has ground everything from aircraft, to Cup camshafts. He does not have a dog in this hunt so he can give you an expert unbiased opinion.
There is absolutely nothing wrong with Allan's cams.
Everyone is entitled to their own opions, but i would not run a cam that i could feel any grooves in the lobes. In the long run it will grove your lifter roller.
Thats just my .02cents.
Thats just my .02cents.
Believe me when I say that your wife / girlfriend could probably file down her fingernails on some of the ridges. Perhaps not so much now that the cam has had this many miles on it. It really resembles a very fine crosscut file. I dont know what I was thinking when i first installed this acuse theyre clearly visable. I guess I just trusted the cam to work perfectly.
I am not in any way shape or form saying that futral has a bad product. There is absolutely nothing wrong with their cams. Its my cam (as well as a few others, apparently) which specifically seem to have a problem. Even with this unfortunate experience, I still highly recommend futral cams to those that ask my opinion. I loved my f13 wen I had it installed. I just wish it didnt take out my lifters.... twice.... assuming that it is determined that the finish was at fault.
I am not in any way shape or form saying that futral has a bad product. There is absolutely nothing wrong with their cams. Its my cam (as well as a few others, apparently) which specifically seem to have a problem. Even with this unfortunate experience, I still highly recommend futral cams to those that ask my opinion. I loved my f13 wen I had it installed. I just wish it didnt take out my lifters.... twice.... assuming that it is determined that the finish was at fault.
Last edited by GuitsBoy; Mar 2, 2006 at 12:22 PM.
I will be happy to give Steves phone number to anyone who wants it.. . .super guy and will answer any questions you have.
When all of this comes out in the wash I am confident it will not be caused by the camshaft grinding technique nor the lifters but an inherent flaw in the enviroment.
When all of this comes out in the wash I am confident it will not be caused by the camshaft grinding technique nor the lifters but an inherent flaw in the enviroment.
Originally Posted by Cstraub
Those pictures of the tooling marks on the lobes will not cause lifter failure. A lobe does not have to be completely smooth in fact a little texture to it is better. These lobes are being used in other engine familys with NO issues. The gauling of these lobes and lifter rollers are specific to the the LS1 family of engines.
If anyone wants a good education in cam lobes and what will and won't work I will be more then happy to give you the number of Demos Cams. Steve has 25 years experience in grinding cams, Hands on. He has ground everything from aircraft, to Cup camshafts. He does not have a dog in this hunt so he can give you an expert unbiased opinion.
There is absolutely nothing wrong with Allan's cams.
If anyone wants a good education in cam lobes and what will and won't work I will be more then happy to give you the number of Demos Cams. Steve has 25 years experience in grinding cams, Hands on. He has ground everything from aircraft, to Cup camshafts. He does not have a dog in this hunt so he can give you an expert unbiased opinion.
There is absolutely nothing wrong with Allan's cams.
Staging Lane
Joined: May 2005
Posts: 68
Likes: 0
From: Vevay,IN
These marks you see in the cam are from the grind of the blank. I work in a steel mill and we grind work rolls alot bigger, but it is a cnc grinder. These marks are caused from the grinding wheel. It can be caused by several things but not being balanced properly will leave weird machining marks like this. I would want my cam surface as smooth as can be, you want it to look like a mirror finish. These machining marks will damage lifters and other stuff as well because it is a surface that wears. I personally have used cams from comp, gm, and lunati and I know these to be quality cams.