What is this engine?
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Joined: Oct 2018
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What is this engine?
OK, before you all say what an idiot, a little background.
I bought a 1978 C3 off a very nice gentleman who has early stage Altziemers.
He said the engine was replaced a few years ago with a 383 stroker crate engine. That's all.
It is clearly not stock with Hedman headers and MSD ignition system.
I can't see any identification marks. Does anyone know if this engine is likely to have identification markings and where to Look?
I'm not asking how to tell difference between 350 vs 383.
Non EGR, edelbrock performance intake, no oil pressure switch, no Charcoal canister
PO said it was a crate engine specifically for corvettes, but again he was sadly confused about a number of things so I am not positive he was correct.
Has edelbrock 600 carb (1405 or 1406 I think)
Any help much appreciated.
Motor is post 2011, probably less than 5 years old
I bought a 1978 C3 off a very nice gentleman who has early stage Altziemers.
He said the engine was replaced a few years ago with a 383 stroker crate engine. That's all.
It is clearly not stock with Hedman headers and MSD ignition system.
I can't see any identification marks. Does anyone know if this engine is likely to have identification markings and where to Look?
I'm not asking how to tell difference between 350 vs 383.
Non EGR, edelbrock performance intake, no oil pressure switch, no Charcoal canister
PO said it was a crate engine specifically for corvettes, but again he was sadly confused about a number of things so I am not positive he was correct.
Has edelbrock 600 carb (1405 or 1406 I think)
Any help much appreciated.
Motor is post 2011, probably less than 5 years old
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Joined: Oct 2018
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Race Director
Joined: Mar 2017
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From: Virginia
If it's a 383, it is probably a rebuilt GM block. The engine stamp pad is located at the top of the block ahead of the passenger side head, just above where the water pump bolts to the block. It may be behind your AC compressor, if you have one. If it is a rebuilt Corvette engine, the codes on the stamp pad will tell you. Or tell you have a GM crate engine like a ZZ4.
https://www.google.com/search?q=c3+c...p+pad+location
The casting number on the block, and on the heads for that matter, would be helpful. Aluminum heads? Any pictures would help, especially ones with casting numbers, or other stamped numbers.
https://www.google.com/search?q=c3+c...p+pad+location
The casting number on the block, and on the heads for that matter, would be helpful. Aluminum heads? Any pictures would help, especially ones with casting numbers, or other stamped numbers.
Thread Starter
Advanced
Joined: Oct 2018
Posts: 69
Likes: 8
Will add pictures soon...can’t upload for some reason
If it's a 383, it is probably a rebuilt GM block. The engine stamp pad is located at the top of the block ahead of the passenger side head, just above where the water pump bolts to the block. It may be behind your AC compressor, if you have one. If it is a rebuilt Corvette engine, the codes on the stamp pad will tell you. Or tell you have a GM crate engine like a ZZ4.
https://www.google.com/search?q=c3+c...p+pad+location
The casting number on the block, and on the heads for that matter, would be helpful. Aluminum heads? Any pictures would help, especially ones with casting numbers, or other stamped numbers.
https://www.google.com/search?q=c3+c...p+pad+location
The casting number on the block, and on the heads for that matter, would be helpful. Aluminum heads? Any pictures would help, especially ones with casting numbers, or other stamped numbers.
Last edited by JohnnyJJ; Oct 12, 2018 at 10:01 AM.
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Race Director
Joined: Mar 2017
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From: Virginia
Nice looking car!
Could you look again for the stamp pad? Right where the alternator bracket is in your third engine photo, that's where the stamp pad will be below the other head (passenger side) on the other side of the car. It might be painted orange. I had to scrape muck and paint off of mine.
Could you look again for the stamp pad? Right where the alternator bracket is in your third engine photo, that's where the stamp pad will be below the other head (passenger side) on the other side of the car. It might be painted orange. I had to scrape muck and paint off of mine.
Race Director
Joined: Jul 2015
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From: SW Florida.
although, in truth the difference between a 350 and a 383 is the stroke. And you can't see the stroke from the outside. So unless you're going to pull ahead or drop the oil pan you're not going to know whether you got a three and a half or three and three quarter inch stroke crankshaft.come to think of it, yes there is. The harmonic balancer and the flywheel are both going to have counterweights on them if it's an externally balanced 3.75 Stroke motor, which most of them are. The 3.5 stroke 350 or neutral internal balance Motors the balancer doesn't have any counterweights the flywheel doesn't have any counterweights.
Drifting
Joined: Jul 2011
Posts: 1,697
Likes: 139
From: Syracuse NY
How is the block stamp relevant if we suspect this is a 383? The only way its going to help is if a remanufacturing company or machine shop stamped additional info on it.
To answer your question, you wont know its a 383 without taking the engine apart. Honestly, Id focus on getting it running first. The body looks nice and sharp, lets hope the engine bay cleans up as nicely.
To answer your question, you wont know its a 383 without taking the engine apart. Honestly, Id focus on getting it running first. The body looks nice and sharp, lets hope the engine bay cleans up as nicely.
