'73 454 4 bolt ?
Thread Starter
Instructor
Joined: Nov 2005
Posts: 137
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From: Seattle WA
'73 454 4 bolt ?
I had a '73 454 Corvette motor rebuilt years ago. As I recall at the time the builder stated that it had a 4 bolt forged steel crank. Could this have been possible? Motor was pulled from a wrecked '73 corvette coupe, I saw the car.
Thanks,
SW
Thanks,
SW
Last edited by woodlawnmill; Feb 16, 2018 at 11:16 AM. Reason: add name
Race Director
Joined: Mar 2016
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From: Napa Valley California
I believe they all came that way in 73, but it doesn't mean the motor pulled from another 73 was the original 454.
Thread Starter
Instructor
Joined: Nov 2005
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From: Seattle WA
Melting Slicks
Joined: Oct 2008
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From: Regina Sk Canada
A forged steel crank will have a wide parting line on the counter weight, a cast crank has a thin one. A cast crank will make a thud sound when you tap it with another piece on metal, a forged crank will ring like a bell.
Instructor
Joined: Jun 2006
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From: North Brunswick New Jersey
What if you stuck a bore scope up the oil drain hole and had a look at the crank bearing caps. You only need to see one. If you drain the oil into a clean receptacle, it can be filtered and put back in.
Melting Slicks
Joined: Oct 2008
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From: Regina Sk Canada
Was reading on another forum and came across these.
All 454s were supposed to come with forged cranks through 1972. In 1973 they started using cast cranks (except on 4-speed Corvettes which continued with forged cranks).
All 454s were supposed to come with forged cranks through 1972. In 1973 they started using cast cranks (except on 4-speed Corvettes which continued with forged cranks).
Thread Starter
Instructor
Joined: Nov 2005
Posts: 137
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From: Seattle WA
SW
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Melting Slicks
Joined: Oct 2008
Posts: 2,154
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From: Regina Sk Canada
I ran a 2 bolt main 454 block with a stud kit in the mains, it made 708HP on the motor and 1006 on nitrous. The motor is still together, and now in a race car i had it in my 77 camaro. Stock cast crank will take 600 hp 2 bolt main block will as well.