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Old Mar 21, 2013 | 08:15 AM
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Default mystery cam? UPDATE 1/9/15, mystery solved

A friend just pulled the cam from his car. He rebuilt the engine a few years ago and bought what he was told was a used stock 98 ls1 cam.

The whole time since then the car loped something ridiculous...but he has ran on stock valvesprings the whole time with no issues. His car seriously sounded like it had more lope than my 230/238 does. It got better when he replaced some pushrods which were too long with some shorter ones, but it still didn't sound like any other stock ls1 I've heard.

The cam looks good with no abnormal wear or anything, but it does not have anything stamped or engraved on it anywhere that I could find with a quick once over.

Is there any way to get some clue what this could be without sending it off to be cam doctored? If it is indeed safe to run with stock or ls6 springs for whatever reason, I would like to put it in my Silverado.

Last edited by thunderstruck507; Jan 9, 2015 at 04:27 PM.
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Old Mar 21, 2013 | 10:01 AM
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is there any markings or numbers on the cam?
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Old Mar 21, 2013 | 10:04 AM
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If you have questions about the cam/lobes used, why not run some PSI or PAC beehives. They should be up to snuff on whatever the cam is and would add some peace of mind.
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Old Mar 21, 2013 | 10:06 AM
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Might as well send the cam off to get the specs off of it. I would never run any cam without knowing what specs they are.
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Old Mar 21, 2013 | 10:54 AM
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I intend to get it cam doctored, but not unless I can determine if it's stock or not somehow. IIRC is is $25 to have it checked plus around $12 shipping each way.

Don't want to waste that much dicking around with it if it's really stock and there is some other issue making the car idle like it's cammed.

Is there some way I could get a ballpark duration estimate or anything?
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Old Mar 21, 2013 | 06:58 PM
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Originally Posted by thunderstruck507
I looked it over again. There are no markings at all on either end.

I found some numbers behind the front journal:

121
00

Then further down the cam there is what appears to be an "E"
Just checked it again to be 100%, there are no other markings what so ever and no wear on the rear which would have removed markings

Is it safe to say its probably not a gm stock cam?
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Old Mar 21, 2013 | 09:28 PM
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I would think it's safe to say it's not a gm cam. all gm cams I have seen have had numbers on them.
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Old Mar 22, 2013 | 09:07 AM
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Does anyone have a recommendation where to send it to get checked out?
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Old Mar 22, 2013 | 09:10 AM
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I think EPS does cam doctoring.
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Old Mar 22, 2013 | 09:16 AM
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He does but I wasn't sure if he only did it on his cams or not. I'll give him a call.

Hopefully this is something mild enough I can toss it in my truck with a ls2 chain and some ls6 springs for a slight power bump and an idle that doesn't sound like a boat.
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Old Mar 22, 2013 | 12:23 PM
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Cam Motion does as well. I have the cam doctor report on my cam from them.
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Old Mar 22, 2013 | 04:17 PM
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Was really hoping for some kind of lead, but I've been googling for around an hour and can't come up with anything using the numbers or letter E.

I tried searching for threads on what cam could be ran with stock springs and of course found nothing that way either.

I find it to be very odd that there are no other part numbers or markings and more so that the car ran so long on stock springs without valve float or other issues. Especially considering the fact the car had a noticeable lope to it.

Guess we won't know until I can get it sent off. If anyone knows of any leads on old school manufacturers who might have had something let me know.
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Old Mar 22, 2013 | 04:21 PM
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I've got a 98 ls1 cam sitting here right now, I'll go take a look at it and take a snapshot of it.
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Old Mar 22, 2013 | 04:31 PM
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I guess there is always the possibility that it could be a varied/early run, but then the car loping still wouldn't make much sense unless it's been reground.

A picture of yours would be helpful. All the other stock cams I've seen had a series of numbers on one end.
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Old Mar 23, 2013 | 02:19 PM
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After more research I believe it might be an old Crane Cams grind from the early 2000s and have found a few people with cams with the same "xxx" number over a "xx' number but none that match this one, so it might have been custom.

Saw a rep from Crane who used to post on here mention they had a website where everyone could enter custom cam specs to order, could be what happened here.

Going to email Crane on Monday and look for a place to send it off.
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Old Mar 24, 2013 | 03:38 PM
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Might be one of my custom grinds
Used a bench grinder to make these quite a bit back in the late 90s...lol

I thought about it for a while, I'd just send it in and get it doctored either way...
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Old Sep 6, 2013 | 04:07 PM
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Never did get a chance to send this off but he tried to use a micrometer to check lift and thinks it is right at .540"

There is an old school Edelbrock cam with .540" lift, 230/237 on a 110+4. Would certainly explain a lot...high overlap, low lift, stock tune...would make for a car that sounds nasty but won't idle or run for ****. Part number is 2216 though so that doesn't match the "121" or "00" I'm seeing.

Anyone ever seen an Edelbrock cam in person to see where the part numbers are and how they are shown? Would certainly explain the "E" cast into the core.
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Old Sep 6, 2013 | 07:44 PM
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Lunati has a cam with those spec but its on a 112lsa. The old pn is 55007LUN and the new is 20540507. I know a guy that put down some pretty impressive numbers and times with that cam.
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Old Jan 9, 2015 | 04:27 PM
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Mystery solved, sent it to be checked at Cam Motion.

The cam is basically a copy of the GM Hot Cam. I don't think it's a real one due to the lack of GM markings.

218/229 .521/.523 on a 112 lsa
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Old Jan 9, 2015 | 06:30 PM
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Originally Posted by thunderstruck507
Mystery solved, sent it to be checked at Cam Motion. The cam is basically a copy of the GM Hot Cam. I don't think it's a real one due to the lack of GM markings. 218/229 .521/.523 on a 112 lsa
I was in there yesterday. Kip's place is just flat out badass to go tour. I loved it there.
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