Help ID a cam shaft
Thread Starter
Burning Brakes
Joined: Nov 2001
Posts: 920
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From: Cherry Hill NJ
Help ID a cam shaft
The rebuild continues.
My engine had 141K miles on it, but the cam was certainly replaced. I wish I new the proper term to describe, but in any event, here goes: The bigger protuberances (are these lobes?) that are not the biggest ones (are these bearing journals?) seem to be heat treated. The gaps between these are a diamond-like pattern. The cam has been stamped, as best as I can tell, C P C B C 1 6 5 0 6.
Can anyone help me decode what cam I already have?
My engine had 141K miles on it, but the cam was certainly replaced. I wish I new the proper term to describe, but in any event, here goes: The bigger protuberances (are these lobes?) that are not the biggest ones (are these bearing journals?) seem to be heat treated. The gaps between these are a diamond-like pattern. The cam has been stamped, as best as I can tell, C P C B C 1 6 5 0 6.
Can anyone help me decode what cam I already have?
Thread Starter
Burning Brakes
Joined: Nov 2001
Posts: 920
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From: Cherry Hill NJ
If so, the lack of wear, compared to the valvetrain, is astonishing. Still, I want to make sure I'm not by-passing an LT4 Hot Cam, a CC 305 or something of that ilk. It appears to have a non-factory chip in it, so there's a reson for that. But then, you make a good point, why wouldn't it be stock - who would not redo the valves at the same time they upgraded the cam?
Also, the guy doing the rebuild for me has 40 years experience and is pretty sure it is not a stock Chevy cam, but that begs the "but is it a stock LT1 cam" question.
Also, the guy doing the rebuild for me has 40 years experience and is pretty sure it is not a stock Chevy cam, but that begs the "but is it a stock LT1 cam" question.
Thread Starter
Burning Brakes
Joined: Nov 2001
Posts: 920
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From: Cherry Hill NJ
The only markings I can find on this polished steel (perhaps stainless?) cam is CPC . BC . 16 ... 506 and a little to the left of that is an "F" stamped (no quotation marks, only the letter F).
Is this what your stock cam looked like prior to changing? What are some of the aftermarket cams you've used?
Is this what your stock cam looked like prior to changing? What are some of the aftermarket cams you've used?
Burning Brakes
Joined: Feb 2000
Posts: 927
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From: Saginaw TX
I don't have an LT1 Roller cam, but a flat tappet L98 and it shows a CWC and a 3 sets of stacked numbers which I assume is the part number. Your cam should be billet steel as most roller cams are. CPC could very well be the GM division - Chevrolet-Pontiac-can't remember the rest. Good Luck in your search. I'm sure someone with intimate LT1 knowledge will chime in.
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Stock LT1 Camshaft
Originally Posted by jimbomill
The bigger protuberances (are these lobes?) that are not the biggest ones (are these bearing journals?) seem to be heat treated. The gaps between these are a diamond-like pattern.
From what I can see the markings on my camshaft are. GMPT BO13241.
This page may help. http://www.automotiverebuilder.com/ar/ar99928.htm
Thread Starter
Burning Brakes
Joined: Nov 2001
Posts: 920
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From: Cherry Hill NJ
Neat link thanks!
From the pic of the cams to the right of the "RODS" writeup, mine does appear to look like a regular cam from 1992, however, I do not have "241" stamped anywhere on the cam, only the "F" about 1/3 the way down and the "CPC. BC.16...506" markings. So, I am slightly less confused
I wonder what the Hot Cam would look like....
From the pic of the cams to the right of the "RODS" writeup, mine does appear to look like a regular cam from 1992, however, I do not have "241" stamped anywhere on the cam, only the "F" about 1/3 the way down and the "CPC. BC.16...506" markings. So, I am slightly less confused
I wonder what the Hot Cam would look like....
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Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
You can have a shop measure it for you so you will know the specs like duration at .002" & at .050" as well as lift and LSA.
That info should be enough to tell if it's stock.
That info should be enough to tell if it's stock.
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
No Hot Cam
Originally Posted by jimbomill
I wonder what the Hot Cam would look like....
Thread Starter
Burning Brakes
Joined: Nov 2001
Posts: 920
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From: Cherry Hill NJ
That helps point the evidence away from non-stock. I'm feeling better - it doesn't sound like this is a common cam, even if it MYA not be a stock cam.
Someone else suggested I get a shop to measure - I guess that is the best approach now. Any ideas where I can get stock numbers for the specs?
Someone else suggested I get a shop to measure - I guess that is the best approach now. Any ideas where I can get stock numbers for the specs?
