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Old 05-30-2006, 06:50 PM
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sbc 283

i have a sbc 283 code # 3849852 with 60cc heads year code# A 9 5
question is , what would be a good crank and cam combo for this motor
bored .60 over ?

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Old 05-30-2006, 09:02 PM
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Here`s one: remove 283, drop in 350. The 283 has a small journal crank, which GM stopped using in 1967, also most 283`s did not have a relieved webbing so you couldn`t swap cranks.
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Old 05-30-2006, 09:15 PM
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the 283 ID#3849852 ,i have only found 1 site with these #s showing as a large journal, it comes up on several searches as an older pre-64 block and on some as a post-64 , the # A95 i believe to be the casting date , which would be jan-9-1965
the motor and heads are all original, and i would like to build up the motor , with maybe a .60 or .80 bored , i already have a 327 in a 70 nova , and would like to put the 283 in a 62 to 64 nova .
from what i have been finding out online bored .80 would put it at a 292?
but i still am not sure of the journal size ? so many conflicting info
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Old 05-30-2006, 09:21 PM
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All of the 283s were small journal.

I would go with the cadting date of '65. You'll find that there are often mistakes in a lot of the reference books.
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Old 05-30-2006, 09:22 PM
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There was no large journal 283`s made. The last year of the 283 was 1967, GM went to large journal in `68. The only thing close was a 307 which had a stroke of a 327, however, finding a 3.00 stroke crank to destroke it back to a 283 is the hard part.
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Old 05-30-2006, 09:41 PM
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i really dont care for the 350s, seems everyone has a 350 this or 350 that,,
i went with a 327 in my nova just to get away from the 350 crowd, and would like to do something with this 283, what casting # or years were good for excepting a small journal 327? my brother-in-law has a 288 cam i could possibaly use
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Old 05-30-2006, 10:07 PM
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327 cranks from '62 to '67 will fit. Don't get rid of that 283 crank. They seem to be in demand by guys building 302s.
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Old 05-30-2006, 10:10 PM
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combo for the streets. true 9.0 flat top cast build. sum1102(performer cam) with matching intake and a vac secondary carb around 600cfm or less.

learn and hone your skills on something that would be hard to destruct. low spring pressures, with reasonable rpms staying paramount.

Last edited by spinn; 05-30-2006 at 10:16 PM.
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Old 05-30-2006, 11:19 PM
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i must have miss read or missinterpreted ,that not all 283s would except the 327 crank, due to the fact they had to be dished to allow for the size?
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Old 05-31-2006, 09:03 AM
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Sbc 283

Bore On Stock 283 Is 3.875. So .080 Over Would Give You 3.955 Bore & That Would Give You 312 C.i. & The 327 Crank Is Interchangeable*Let me qualify that statement: pre 67 to pre 67 283/327 cranks should be interchangeable.

Last edited by QUICKCHANGE; 05-31-2006 at 09:14 AM. Reason: ADDITION
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Old 05-31-2006, 09:53 AM
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Quote:
Originally Posted by QUICKCHANGE
Bore On Stock 283 Is 3.875. So .080 Over Would Give You 3.955 Bore & That Would Give You 312 C.i. & The 327 Crank Is Interchangeable*Let me qualify that statement: pre 67 to pre 67 283/327 cranks should be interchangeable.
The 302 is a 4.00" bore and 3.00" stroke so a 3.955 bore on a 283 can't be 312 Cu. In. My Desktop Dyno calculates the 283 bored out to 3.955 as 294.8 Cu. In. However, back in the day, they were referred to as "292's".

You must be thinking of a 327 crank using that bore which comes out to 319.4 Cu. In. The 283 crank is 3.00". The 327 is 3.25".

Last edited by jhs914; 05-31-2006 at 09:58 AM.
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Old 05-31-2006, 09:58 AM
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Sbc283

Quote:
Originally Posted by jhs914
The 302 is a 4.00" bore and 3.00" stroke so a 3.955 bore on a 283 can't be 312 Cu. In. My Desktop Dyno calculates the 283 bored out to 3.955 as 294.8 Cu. In.
MY BAD,...TRYING TO DO TOO MANY THINGS AT ONCE TODAY. YOU'RE RIGHT SORRY OLD GOLD
THX FOR PULLIN ME OUTTA THAT ONE JHS914
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Old 05-31-2006, 02:03 PM
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thanks all for the info , still not sure as to how or what i will do with the 283, i found some other site with some info from someone else that was stating that you could get up to and over 400hp out of the 283?
i would like to build it up and find a ol 64 chevy van to drop it in , but they are harder too find then the ol 62 to 64 nova's
my 70 nova i have now has a 327/th350 with 10bolt posi 3.73s, its ok for now , at least until i get all the other components taken care of , then it will get changed.
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Old 05-31-2006, 02:32 PM
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Build the 292, put some good money in the valve train, forged pistons, a hydraulic cam of about 280 duration, dual plane intake with a 600 Holley and headers. Put it in a light car with a four speed and have a ball. Move your redline up to about 7K, keep your foot in it and power shift....ah the memories.

Vince
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Old 05-31-2006, 05:19 PM
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My 283 is 60 over with flat tops. the heads are off a mid 80's 305 which I get off ebay rebuilt for $250. I took all the valves out, gasket matched them and did alittle short side radius and port work, nothing special, and put them back together. I had a summit 1103 cam in it, and man did it sound mean!! only problem was the th350 trans (I know I should have went with a manual but pedal room is an issue) did not like the cam, nor did the fuel injection, and the crap 2.75 rear gears probibly would not have liked it either.

I ended up putting a summit 1100 cam in it now. The engine idles quite nice and it will actually run in gear now!! Engine seems to run great with the new cam, probibly not as much top end now, but that ok. Still spins the tires on dry concrete (of coarse the car does not weigh anything)

I like the little engine, and if I can get a good tune on it I hope for 20+ mpg.
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