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Author
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Topic: Cam Experts need advice
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Wht86drop
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Member # 12104
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My friend bought an old model used tfs51402001 cam about 4 months ago. Summit says it's discontinued and now since he doesn't need it, he wanted to sell it. So with that said I went to sell it for him and I was told that the cam is not what it was supposed to be. The engraving for one is a little illegible and the engraving for the lobe separation is really illegible. Another thing is that the part where the engraving is, there is grind marks like it might have been smoothed out with a wheel. What I was told is that the grind marks are not supposed to be there but instead there should be machine lines like it was put on a lathe. Does any of this make sense to you guys?
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Posts: 1669 | From: East Palo Alto, Fiji Islands | Registered: Jun 2012
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Tom Renzo
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Member # 13165
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Yes it does. Throw the cam in the scrap pile. If it is messed up no sense in even trying to sell it or using it. cams are cheap enough. I never install a used cam for anyone. If they want a cam change i use new only. Sorry.
Camshaft, Hydraulic Roller, Advertised Duration 286/289, Lift .542/.563, Lobe Sep. 112, Small Ford, 5.0L,
Not a bad cam but you can get a new one for 200 Bucks that is identical. So in reality how much could you possibly sell it for. ?????
Post a photo of it . And plot it out on 2 V blocks to identify it. It just,might be that cam but it sounds like someone hacked it up for some reason. Like i said 5.0 cams are cheap.
[ 2014-06-24, 05:42 PM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Wht86drop
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Member # 12104
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That doesn't answer my question. Lobes aren't damaged. I just want to know if what I'm explaining makes sense to anyone. It doesn't matter to me if it's used. If it looks and feels good I'm not worried about it being used since it becomes used right when you throw it in.
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Posts: 1669 | From: East Palo Alto, Fiji Islands | Registered: Jun 2012
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Tom Renzo
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Member # 13165
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Ok if it can not be identified then what. So better plot it out and sell it for a few bucks. That is all it is worth. I would personally never buy a used cam . But what the heck. Throw it on 2 V Blocks with a degree wheel or install it in an engine and plot the lift duration and LS. Then when you can identify it's specks someone just might buy it. Good luck
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Wht86drop
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Member # 12104
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posted
TTT
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Posts: 1669 | From: East Palo Alto, Fiji Islands | Registered: Jun 2012
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warhorse58gt
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Member # 7702
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quote:
Originally posted by Tom Renzo:
Ok if it can not be identified then what. So better plot it out and sell it for a few bucks. That is all it is worth. I would personally never buy a used cam . But what the heck. Throw it on 2 V Blocks with a degree wheel or install it in an engine and plot the lift duration and LS. Then when you can identify it's specks someone just might buy it. Good luck
Dude all you do is badger people. If they don't think like you do. You start talking down to them. If you don't have a answer for him. Move the fuck on... Don't post.. Move on. He didn't ask if you would use it. This is what he asked... "The engraving for one is a little illegible and the engraving for the lobe separation is really illegible. Another thing is that the part where the engraving is, there is grind marks like it might have been smoothed out with a wheel. What I was told is that the grind marks are not supposed to be there but instead there should be machine lines like it was put on a lathe. Does any of this make sense to you guys?" ![[patriot]](graemlins/patriot.gif)
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Posts: 4200 | From: 209 | Registered: Jun 2007
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Duncan Motors
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Member # 7045
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posted
could been rubbing up against the cam freeze plug seal, ive seen them installed to far in and they rubbed the cam giving them a weird finish, post a pic so we can badger the picture better lol
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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Wht86drop
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Member # 12104
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posted
quote:
Originally posted by warhorse58gt:
quote:
Originally posted by Tom Renzo:
Ok if it can not be identified then what. So better plot it out and sell it for a few bucks. That is all it is worth. I would personally never buy a used cam . But what the heck. Throw it on 2 V Blocks with a degree wheel or install it in an engine and plot the lift duration and LS. Then when you can identify it's specks someone just might buy it. Good luck
Dude all you do is badger people. If they don't think like you do. You start talking down to them. If you don't have a answer for him. Move the fuck on... Don't post.. Move on. He didn't ask if you would use it. This is what he asked... "The engraving for one is a little illegible and the engraving for the lobe separation is really illegible. Another thing is that the part where the engraving is, there is grind marks like it might have been smoothed out with a wheel. What I was told is that the grind marks are not supposed to be there but instead there should be machine lines like it was put on a lathe. Does any of this make sense to you guys?"
Nuf said
ps: "California" site
[ 2014-06-25, 04:09 AM: Message edited by: Wht86drop ]
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Posts: 1669 | From: East Palo Alto, Fiji Islands | Registered: Jun 2012
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Wht86drop
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Member # 12104
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posted
quote:
Originally posted by Duncan Motors:
could been rubbing up against the cam freeze plug seal, ive seen them installed to far in and they rubbed the cam giving them a weird finish, post a pic so we can badger the picture better lol
Definitely not the freeze plug seal. It's not a grind that would be caused from rotation. More like it could have been put against a sanding wheel or something like that. I'll post pics in the afternoon. Just trying to figure out if he got played on his deal or not so it can be returned to the person who sold it to him.
[ 2014-06-25, 04:07 AM: Message edited by: Wht86drop ]
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Posts: 1669 | From: East Palo Alto, Fiji Islands | Registered: Jun 2012
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Blow_U_In_Reverse
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Member # 12298
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slide through to my house.. I have 2 trickflow cams that I bought brand new, u can compare them..
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Posts: 2688 | From: FiJi-925-650 | Registered: Aug 2012
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Tom Renzo
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Member # 13165
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They might have ground it for clearance or thought it was hitting the block or ground off the numbers to not show what kind of cam it is. That is all i can think of. Normally cam grinds are easily read and legible. I am not trying to badger anyone. God only knows why people do things they do. I posted the cam specks of the cam in question. Check it out with a degree wheel and a dial indicator. This way you will know exactly what you have. If there is no numbers legible what else can you do to verify the cam and it's specks.
Camshaft, Hydraulic Roller, Advertised Duration 286/289, Lift .542/.563, Lobe Sep. 112, Small Ford, 5.0L,
[ 2014-06-25, 06:56 PM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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blueoval55
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Member # 9787
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i have installed brand new cams out of the box that the rear of them are ground on. its very possible that it came that way. i think some cam manufactures do that so its shiny and easier to read when they engrave/stamp them. if its engraved, and not stamped then its possible somebody sent a cam in to have it re-ground, and they ground off the previous markings to re-mark it to their specs. usually when i see the cams engraved, not stamped, its because it was a custom ground cam. off the shelf cams usually are stamped. i also have ground on the ends of cams.... but usually with a die grinder and small round carbide burr to only remove the identification markings.
Posts: 95 | Registered: Feb 2010
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Wht86drop
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Member # 12104
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posted
See for yourself
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Posts: 1669 | From: East Palo Alto, Fiji Islands | Registered: Jun 2012
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triple b
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Member # 8763
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Im tom renzo and I approve to bullshit everyone on this board lol all trickflow cams are engraved like that where its difficult to read your cam the guy was doing it on friday and close to 3:30pm quitting time lol.
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Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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Tom Renzo
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Member # 13165
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posted
With that there is nothing wrong with that cam. The original post made it sound like it was grinded down and totally messed up. You can clearly read the part number and that identifies the cam. The back of the cam is always engraved like this by most cam grinders. That is normal now that it is posted in a photo as i actually asked a couple posts ago. That is why a photo is worth a thousand words. Hay if an engine has 2 cams does that count TWICE as the number of cams i install. Here is one of my TRICK FLOW HEADS!!!!!!!!
[ 2014-06-26, 04:27 AM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Wht86drop
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Member # 12104
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posted
Okay then can you explain why the lobe separation numbers can't be read?
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Posts: 1669 | From: East Palo Alto, Fiji Islands | Registered: Jun 2012
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Tom Renzo
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Member # 13165
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posted
Sometimes they are not ground in enough by the person that does it. Also thyat grinding marks is typical of end bearings and to duplicate it so accurately with a hand grinder would be a stretch. No one ground that end bearing by the photo you are posting. Either way it appears that the cam is what it says. If not check the cam on a pair of V Blocks a degree wheel and a dial indicator. If you do not know or have the tools to do it send me the cam and i will profile it for you free of charge. Have a good day
[ 2014-06-26, 04:43 AM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Duncan Motors
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Member # 7045
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posted
there is no info other than teh part number, somebody did that by hand, very common for coustom or earlier made cams. now i think there stamped better. nothing wrong with it
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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Wht86drop
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Member # 12104
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posted
Well with that said I'll check the lobes and go from there. No sense in chalking a good cam ![[burnout]](graemlins/burnout.gif)
Thanks for all the feedback
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Posts: 1669 | From: East Palo Alto, Fiji Islands | Registered: Jun 2012
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Duncan Motors
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Member # 7045
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posted
yeah that grind mark is factory, im not sure hwat renzo meant by always neded a new cam, flat tappit older stuff non roller will wear out an is straite garbage, these newer roller cams even stock are billet, they dont wear out unless something blew up.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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Tom Renzo
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Member # 13165
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Absolutely Mr Duncan a roller cam can be used in any engine even if it is used. I personally have a strict policy of not installing used cams. Me and my techs discussed this years ago and came up with the policy. But as you point out roller cams do not take a pattern set so they can be swapped in to different engines with no issues. By the way those marks on the back of the cam is the wet wheel that cut the stock off to length before the cam was machined. That is from the wet wheel or cutoff marks to be factual.By the way that is the only part of the cam that does not have to be machine finished and cam grinders do not do it.Thats why it has the marks on the face of the end bearing portion of the cam. And where it is marked with the part number ETC.
[ 2014-06-26, 05:25 PM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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