Big4x4Ride

I have come across an engine I cna get for a good price, just wondering what kidn of power it may have. Its a Chevy 283, punched .030. It has dome pistons and some 76cc 400 heads. Block casting is 3862194, heads are 3951598. Supposed to be about 11:1 with these pistons and heads(kinda high for 76cc heads??)). It's just a shortblock, and I have most necessary stuff to finsih it of, just curious as to what kind of numbers may be possible. I assumer with teh short stroke it will be a hi revving engine, just dont want some drag car engine here LoL.
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kevinc

Wouldn't be a good engine to put in a Camaro/Firebird if you wanted to go fast.

AlkyIROC

Unless you're racing in a class that limits the displacement, why even bother with such a small old engine. GM stopped producing 283's in 1967. The 283 uses a 3" stroke and a 3.875 bore which is only slightly bigger than a 305. Since SBC parts are so interchangable, you'd be better off putting any SBC parts on a 350.

Back in the 60's this engine was a good performance engine but internal designs put it out of any performace or reliabilty range of any of the newer engines.

As for how much power, it depends what parts are used. Cam and heads determine how much power it will make but it is still a very small displacement engine. Even calculating a good engine at one hp per CID doesn't make a lot of power from a small engine. There are V6's that will make more power.

Big4x4Ride

I cna get it for free, just curious as to if it will be a better performance engine than the stock 305 in my 85 T/A. Its a 283 bored .030 with .275 pop ups in it . It currently has some 76 cc 400 heads on it (unsure of valves but assume 1.94/1.5). The cam in is is supposed to be a powermax cam 268*/280* .459"/.486". It would be running a torker II intake, with holley 600 cfm carb on it, and shorty headers 1 5/8. I cna swap the cam, intake, carb no prob. Juts curiousabout the numbers. I would think that 300 HP or so is possible out of it, along with being anble to rev pretty high with the short stroke. This is not being built for racing any classes or anything just a fun car to toy around with. Also not sure what kidn of torque it could put out?

five7kid

iTrader: (14)

Worst reason in the world to get it.
No, no, and no. Wouldn't be better performing than the 305; for the street the low reving 305 would be better than a high reving 283; and the 283 would put out less torque than the 305 because it is a smaller engine.

A 305 with good rod bolts and a good valve train will rev just as high as a 3" stroke 283.

People need to get these magazine mechanic generalities out of their heads.

Big4x4Ride

as far as the gettign it free part, only reason it is free is because the personthat started building it is no longer around, and one of their family members offered it to me. Just trying to figure out the numbers on it

kevinc

Take the freebie, and sell it on eBay to someone that doesn't have benefit of the valid advice you're getting here.

AlkyIROC

I've seen a Stock Eliminator Q/SA 68 Impala with a 283 run low 17's. For Q/SA class, that's fast.

five7kid

iTrader: (14)

You sure it was a '68? Last year for the 283 was '67. 307's came out in '68.

THEGENERAL

ive got a similar 283 in my 66 impala I am building with my son...

If it were me id just take the engine and sell it to someone restoring an old impala or car of the such that wants to have an original era correct engine ....then buy a nice short block for your car...

grover85

iTrader: (1)

I would rock it just to be different. Plus I think you would have more power due to the fact that 305 heads are junk.

NHRA427

Last year of small journal 327 was 67, they made big journal 327s in 68 and 69.

five7kid

iTrader: (14)

Yes, I already said that. The question was about a stock class '68 with a 283, not about 327's.

NHRA427

My bad. i was talking in another thread about 327s. small vs big journal. sorry

cam92rs

all he wants is the numbers, i would say 260 sounds about right out of a 283,a guy thats close has 1 with sidepipes off of a vette and it sounds like a v 6 and shoots like a 6 inch flame every time he revs it up,its a nice looking motorand not too bad performing eitherbut i would pick it up,and just hold it for yourself,you can get a pretty penny out of some of em to the right person

mw66nova

iTrader: (13)

depends on the heads. if you have the 416's or 081's, your not doing too bad. i went 13.03@103mph with bonestock 416's on my 305.

Big4x4Ride

scratched the idea of using the 283, building a 350 instead