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GM Camshaft identification

 
Seven9_Monte
V-6 Camaros rule!
Posts: 39
Joined: 04/09
Posted: 04/24/09 05:23 PM

Hows it goin fellas i recently aquired a GM camshaft for 20 bones, i know nothing about it except that it has three days of use. I would love to know the lift and duration but i cant figure out how to look the thing up. any help would be greatly appreciated.!.  

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Seven9_Monte
V-6 Camaros rule!
Posts: 39
Joined: 04/09
Posted: 04/24/09 05:59 PM

So starting at the gear the numbers go
6930    GM59 then upside down toawrd the other end of the cam is A20

PLEASE HELP!!!!  

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Redbeast1
V-6 Camaros rule!
Posts: 56
Joined: 11/07
Posted: 04/24/09 06:21 PM

GM base L48 cam #3896929

This is a GM 327 / 350 HP Cam
Intake Lift = .390
Exhaust Lift = .410
Intake Duration = 310
Exhaust Duration = 320
LSA = 114
Rocker Ratio = 1.50
RPM Range: 2200-5200
Hydraulic Lifter

Part Number = 3896929
Casting Number = 3896930
 
Pretty much a GM stock Truck Cam - you got your $20.00 worth.
( you get what you pay for )  

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Seven9_Monte
V-6 Camaros rule!
Posts: 39
Joined: 04/09
Posted: 04/24/09 07:41 PM

thanks for the help man, wasent the answer i was hoping for but regardless thanks for the help. would u happen to know what the biggest cam i can use would be with stock valves/lifters,pistons etc.?  

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Redbeast1
V-6 Camaros rule!
Posts: 56
Joined: 11/07
Posted: 05/03/09 11:29 AM

Give Comp Cams tech line a call - 800-999-0853.
You probably won't like the answer they give you either.

You can't just slap a beefy cam in a stock engine and expect any kind
of noticeable performance improvement. Usually the reverse is the
most common result - most people new to performance building install a hot cam in an otherwise stock engine and turn the engine into a dog with no torque or high
end power. At the very least you will need to replace the lifters with the new cam and I would recommend replacing the timing set with a double roller set
while you got it off the engine. Be careful of chain clearance issues
on the block when upgrading to a heavy duty chain like a Cloyes. On a 350 block you will have to clearance the block on the top just a bit so the chain won't rub on the front of the block. I'm not sure if the same is true with V6 but I suspect it may be. GM Gen-I era V6 is pretty much a V8 with two less cylinders. There are differences  though.  

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smittles
I love my Chevy Chevette!
Posts: 3
Joined: 03/12
Posted: 03/17/12 10:51 PM

redbeast- i have the same casting number on the cam in the engine that was in my 66 c10 panel truck.  the casting numbers on the block, heads, and crank all point to a 75 chevelle 400 small block engine.  a previous owner put this into my truck.  he also put a 2 barrel intake and carb on top of the 400.  i just learned the engine is worth rebuilding and will be getting into it by the weekend.  are all the specs for this cam the same?  thanks for your time.

monte-thanks for this thread.  

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pepsi1
Big Block power for the win
Posts: 940
Joined: 03/11
Posted: 03/18/12 06:48 PM

Cam #3863151 is the L-79 65-67 Covette and ChevyII It's rated 350HP for 327
the duration at .050 .221/.221 lift .447/.447 ID#3863152

Cam #3896962  61-81 Covette It's L-46&L-48 327 and 350
duration @.050 .222/.222 lift .450/.460 ID#3896964 Grin  Cool  

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brettob
I love my Chevy Chevette!
Posts: 1
Joined: 03/12
Posted: 03/21/12 08:29 PM

Hello and I am new to this site.  I also have a GM camshaft id and spec question.  

I bought a sunk boat and need to replace the camshaft in it.  The engine is a Mercruiser Mag 350 MPI with 300hp. The numbers stamped on the end of the shaft are 09605r and 866022.  I think since boats have different torque and power curves and requirements, I figured I had better replace the cam with one of the correct performance specs.  

Researching on the net, I think the Mercruiser part number is 866022T01 and the Quicksilver part number is 431-866022T.  It is a Chevy Vortec engine with roller lifters and I am not sure if I am forced into a pricey marine part or if there is a decent auto cam that would perform the same.  

Any advice on what cam to use or does anybody have the spec on this cam?  

Thanks so much for your time and have a great week.  Brett  

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Jamesdman24
I love my Chevy Chevette!
Posts: 2
Joined: 04/12
Posted: 04/20/12 05:06 PM

Hey, I have a 454 out of a 1977 scarab boat. I put it in my 1971 Z/28. I spun a rod bearing doing a 7000 rpm burnout. The motor is awesome, floor it and the engine goes to 7000 rpm like a toggle switch. One of the lobes on the cam is worn a little. So I want the same camshaft but I can't decipher the codes....they are only on one end of the cam...they are 900662 on top and 3143 on the bottom.  ANY help would be greatly appreciated. .......thanks  

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pepsi1
Big Block power for the win
Posts: 940
Joined: 03/11
Posted: 04/20/12 05:49 PM

jamesdman34

Thats why the 454 blew up..BBC unless built for high RPM are only good to 6,000 6,200RPM.You were in valve float when that engine spun a bearing you are lucky it didn't window the Block and catch fire....That cam you asked to break down is a Mercruiser P/N.I whould contact them....Another thing to remember when an engine is in a boat the operating Rpm is different from a street engine... Grin  Cool
Bob  

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pepsi1
Big Block power for the win
Posts: 940
Joined: 03/11
Posted: 04/20/12 05:58 PM

Icon Quotebrettob:
Hello and I am new to this site.  I also have a GM camshaft id and spec question.  

I bought a sunk boat and need to replace the camshaft in it.  The engine is a Mercruiser Mag 350 MPI with 300hp. The numbers stamped on the end of the shaft are 09605r and 866022.  I think since boats have different torque and power curves and requirements, I figured I had better replace the cam with one of the correct performance specs.  

Researching on the net, I think the Mercruiser part number is 866022T01 and the Quicksilver part number is 431-866022T.  It is a Chevy Vortec engine with roller lifters and I am not sure if I am forced into a pricey marine part or if there is a decent auto cam that would perform the same.  

Any advice on what cam to use or does anybody have the spec on this cam?  

Thanks so much for your time and have a great week.  Brett


Brett

The cam you want info on is also a speced cam for Mercruiser..You should contact them also...If you knew the specs on the cam then maybe some-one on the forum could help you choose a cam..also remember that boat engines work in an entirely different rpm range then a street engine..Yes you can change the cam to get a little more HP..but you need a place to start...It always goes by the output final drive ratio.and prop pitch.. Do you have a Bravo 1 or an Alpha outdrive,or Volvo Pent? I know what I'm talking about I have had boats in the past...You can put too much RPM to the out-drive, and you can blow it up. then you'll find out what expensive is...Grin  Cool

Bob  

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Jamesdman24
I love my Chevy Chevette!
Posts: 2
Joined: 04/12
Posted: 04/21/12 04:59 PM

Thanks for the info Bob.  

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pepsi1
Big Block power for the win
Posts: 940
Joined: 03/11
Posted: 04/22/12 02:59 AM

Your welcome
Bob  

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1980camarors
I love my Chevy Chevette!
Posts: 8
Joined: 05/12
Posted: 05/21/12 10:30 AM

hey guys i just got a sbc camshaft for $35. its new but not in the original box. im not sure what brand or size it is. can anybody help me?
there is blue paint on the cam with the numbers 1517 in the paint. on the front of the cam there is 284 F10 E1062 below the 284 is 8 8. Behind the fuel pump lobe is c1 behind the fourth cam bearing is cwc. Behind the second cam bearing is c1 and d1. If somebody could help I would appreciate it.  

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1980camarors
I love my Chevy Chevette!
Posts: 8
Joined: 05/12
Posted: 05/21/12 10:31 AM

Ill look for more markings on this camshaft to help.  

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