gr8one99SS

iTrader: (4)

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

redtail2426

iTrader: (10)

i just got my f10 not to long ago and it looks pretty smooth.If you cant feel the tooling marks with your fingernail,then i wouldnt worry about it.

gollum

iTrader: (1)

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

gr8one99SS

iTrader: (4)

i did read that and they can be felt with my finger tips what should i do?

cantdrv65

iTrader: (3)

Send the cam back, dont put it in or you are setting yourself up for a world of hurt. Personally Id stay away from the F13, until they can get the grind the way it should be. Go with a comp cam.

gollum

iTrader: (1)

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

gr8one99SS

iTrader: (4)

thanks guys i pm'ed him so hopefully he will give me a call. I will keep yall posted

redtail2426

iTrader: (10)

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.

gr8one99SS

iTrader: (4)

the groves in my cam are straight but you can feel them pretty easily.

00transamnh

iTrader: (1)

jesus christ i dont know about getting a f13 now

GuitsBoy

iTrader: (4)

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.

gr8one99SS

iTrader: (4)

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.

SideStep

I hope someone is keeping track of all of this... I have a feeling this/these are not the last we hear of it...

Cstraub

iTrader: (1)

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.

BBADWS6

iTrader: (8)

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.

GuitsBoy

iTrader: (4)

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.

Cstraub

iTrader: (1)

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.

redtail2426

iTrader: (10)

mine cant really be felt with my fingernail so im not going to worry about it,they are slightly visible though.If it was any worse i might hesitate.

cantdrv65

iTrader: (3)

Sorry but I strongly disagree... Increased roughness between two surfaces causes increased friction...increased heat leads to premature wear. Its no different than a standard roller bearing used in many places throughout an automobile. Take a carrier bearing for example. A bearing with an unsmooth race or set of rollers is NOT going to survive long, and futhermore it will be horribly noisy.

aux_fast_cam

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.