Help identifying a camshaft - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BIG V · 10-29-2013, 06:42 PM

I have a small block chevy cam the #'s on the end are 7274 WB i can't find any info on this if someone knows anything please chime in.

INSIDIOUS '86 · 10-29-2013, 07:26 PM

What year engine and what did it come out of. Engine casting numbers and head casting numbers.

All will help narrowing down the cam

BIG V · 10-29-2013, 08:14 PM

Its out of a 1974 chevy pickup it had centerbolt valve covers on it from a tbi truck so im assuming its got tbi heads on it, the block is a drivers side dipstick 010 4 bolt 350 block, steel crankshaft (eagle) 2 piece rear main seal the pistons were .030 overbore TRW flat tops and it had a erson gear drive in it. As for casting #s its not a oem original engine so im asuming its not a oem original camshaft. Most camshafts have identifying marks on the end of it, this cam has 7274 WB on it. Im hoping someone has experience in cam shafts and can help me with this because im not looking forward to figuring it out with a mic, and a degree wheel. Lol o yea it also had a cheater N.O.S.kit on it.

I hope the info helps

INSIDIOUS '86 · 10-29-2013, 11:38 PM

Cam look old? Think you can guess when the engine was rebuilt? Trw pistons were the **** back in the day. Not a lot of people running the specifically any more as well as erson stuff since that's just about gone. It's possible it was an erson camshaft and had a kit with lifters and timing gear.

BIG V · 10-30-2013, 12:01 AM

The erson cams had the part # engraved on them like a tq20 so on so forth

INSIDIOUS '86 · 10-30-2013, 01:26 AM

Yah makes it hard to find out then. Factor cam will be small. Very small. 1974 didn't have any high hp engines

cadillac_al · 10-30-2013, 07:19 PM

I didn't think factory cams had any markings on them. It must be aftermarket. I guess you can hope somebody here has replaced a lot of cams and may have a clue of what it is. bump for ya.

INSIDIOUS '86 · 10-31-2013, 03:09 AM

Factory cams have part numbers.

Possible it may be a custom grind from a mom and pop shop of sorts.

10-29-2013, 06:42 PM	#1
BIG V Registered User Join Date: Jul 2009 Location: Northern California Posts: 411	Help identifying a camshaft I have a small block chevy cam the #'s on the end are 7274 WB i can't find any info on this if someone knows anything please chime in. __________________ 1991 Chevy suburban 3/4 ton 4x 4:56 and pulls great 1979 Chevy 1/2 ton long bed diesel 1974 Chevy crew cab short bed 3/4 ton 4x4 project 1991 Chevy suburban 2wd 1984 Chevy suburban 3/4 ton 4x 6.5 detroit with turbo 1961 Chevy pickup 1/2 ton 2wd 1975 gmc crew cab short bed 2wd

10-29-2013, 07:26 PM	#2
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Help identifying a camshaft What year engine and what did it come out of. Engine casting numbers and head casting numbers. All will help narrowing down the cam __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

10-29-2013, 08:14 PM	#3
BIG V Registered User Join Date: Jul 2009 Location: Northern California Posts: 411	Re: Help identifying a camshaft Its out of a 1974 chevy pickup it had centerbolt valve covers on it from a tbi truck so im assuming its got tbi heads on it, the block is a drivers side dipstick 010 4 bolt 350 block, steel crankshaft (eagle) 2 piece rear main seal the pistons were .030 overbore TRW flat tops and it had a erson gear drive in it. As for casting #s its not a oem original engine so im asuming its not a oem original camshaft. Most camshafts have identifying marks on the end of it, this cam has 7274 WB on it. Im hoping someone has experience in cam shafts and can help me with this because im not looking forward to figuring it out with a mic, and a degree wheel. Lol o yea it also had a cheater N.O.S.kit on it. I hope the info helps __________________ 1991 Chevy suburban 3/4 ton 4x 4:56 and pulls great 1979 Chevy 1/2 ton long bed diesel 1974 Chevy crew cab short bed 3/4 ton 4x4 project 1991 Chevy suburban 2wd 1984 Chevy suburban 3/4 ton 4x 6.5 detroit with turbo 1961 Chevy pickup 1/2 ton 2wd 1975 gmc crew cab short bed 2wd

10-29-2013, 11:38 PM	#4
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Help identifying a camshaft Cam look old? Think you can guess when the engine was rebuilt? Trw pistons were the **** back in the day. Not a lot of people running the specifically any more as well as erson stuff since that's just about gone. It's possible it was an erson camshaft and had a kit with lifters and timing gear. __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

10-30-2013, 12:01 AM	#5
BIG V Registered User Join Date: Jul 2009 Location: Northern California Posts: 411	Re: Help identifying a camshaft The erson cams had the part # engraved on them like a tq20 so on so forth __________________ 1991 Chevy suburban 3/4 ton 4x 4:56 and pulls great 1979 Chevy 1/2 ton long bed diesel 1974 Chevy crew cab short bed 3/4 ton 4x4 project 1991 Chevy suburban 2wd 1984 Chevy suburban 3/4 ton 4x 6.5 detroit with turbo 1961 Chevy pickup 1/2 ton 2wd 1975 gmc crew cab short bed 2wd

10-30-2013, 01:26 AM	#6
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Help identifying a camshaft Yah makes it hard to find out then. Factor cam will be small. Very small. 1974 didn't have any high hp engines __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

10-30-2013, 07:19 PM	#7
cadillac_al Registered User Join Date: Oct 2013 Location: Maine Posts: 2,354	Re: Help identifying a camshaft I didn't think factory cams had any markings on them. It must be aftermarket. I guess you can hope somebody here has replaced a lot of cams and may have a clue of what it is. bump for ya. __________________ 76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10

10-31-2013, 03:09 AM	#8
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Help identifying a camshaft Factory cams have part numbers. Possible it may be a custom grind from a mom and pop shop of sorts. __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511



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