I just took apart my 283 last night for our A sedan. Ihave a set of 461 heads to put on it. I want a cam that has a nice sounding idle but will still be streetable. I have heard a lot about the 350hp/327 cam i shure that i have heard one if anyone has a sound clip that would be cool. also any thoughts about putting a 350 crank in my 283. i work with a guy thats just dirty withem' and could pickone up for cheap.
All 283's came with a small journal crankshaft. All 350's are large journal crankshafts ... so it will not bolt in ... but can be done ... by turning the journals down to the small journal size. Possible ... but not cost effective ... If the 461's have the big valves ... the valves will hit the cylinder wallls ... The 350/327 camshaft WAS the hot setup many, many years ago. Camshaft tech has came a long way since then ... I suggest you contact a cam manufacturer that you like and let them pick a cam for you. They are professional and want you to be happy so They will do a GREAT job selecting a camshaft for your combination.
If the 461's have the bug valves ... the valves will hit the cylinder wallls ... how do you tell if they have bug valaes? i have never heard that term
Well ... the letter U is right next to the letter I on the keyboard ... It should have said BIG valves ... the 2.02 and 1.60 ones ...
You'd have to machine in new valve seats to put the 2.02's in, but why? If you plan on spinning this thing at 1200 RPMs, then yes. If it's a street engine, 1.94's are going to work better. Bigger isn't always better. Same goes for the cam. The most important part of building an engine is the planning. Make sure everything is going to work well together. If you hogg the heads, install 2.02/ 1.64 valves and a big lumpy cam, then put a 780 puddle dumper on it, it's going to run like ****. Do your homework. Talk to prof. engine builders, and listen to what they have to say. In my opinion, the 283 is the best small block Chevrolet ever built. Just remember, it's a small displacement engine.
is it posible to punch it out that much with out having to worry about the cylinder walls getting to thin?
If your heads have the 1.94 intakes and the 1.5 exhaust they will work on a 283. In fact they are great heads for a potent 283. Anything larger and you loose port velosity and thus performance. The only 283 based engine to use the 2.02/1,6 heads was the 302 (283 bored to 4") and that combination is a higher RPM engine before it will flow enough air to really take advantage of the 2.02 heads. Frank
while many will say it's ok , i think boring a 283 1/8" is risky with 40+ years of rust . at least have the walls sonic tested before you do
Like they said ... bigger is NOT always better ... The last 283 I built ( about 3 years ago ) I bored it .060 NOT .125 Because you cannot hardly tell the difference in a street car. I would have bored it .030 but I had a set of .060 pop up pistons. A sixty over 283 is 292 cubic inches ...
thanks for all the help. but what do you guys think i could get out if this motor power-wise? I am building this car with my dad and says he wants 350-375hp. I just want a nice sounding cam as i said before and enough power to have some fun with. does any one know the stock hp rating for the 283?
The highest rating Chevrolet EVER put on a 283 was the 283 cubic inch 283 Horsepower Fuel injected model ... If you want 360 - 375 Horsepower streetable ... your dad needs a bigger engine ... a LOT bigger ...
As far as I know the 283 was like 195 horsepower and even then the powerpack 283 was not that much more. If your looking for 375 horse out of a stock or almost stock small block look for a corvette motor. I think it was 1968 the 327 was like 365 or 375 horse. There may be other years but I'm not sure enough of the numbers to try to suggest anything else.Other than that you may be looking at a crate motor.good luck
thats what my dad wants but i dont think we need that much power. after a it going in a 1930 modela sedan. that car is small and is going to be lite. I'm thinkin more like 300hp is more reasonable out of that motor. 300 horses in a car that will be about 2000lbs is not going to be a slug by any means.
does any one know the stock hp rating for the 283?[/QUOTE] go here...run the different years for chev 283's and the different setups. http://www.carnut.com/specs/specs.html
Keep in mind that the 461 heads have 63cc chambers and the original 283 heads came with 58cc heads, so you will be down on compression if you don't use the right pistons. You could have the 461's milled a couple thou' to take them down a couple CC's. I have run the 350 HP 327 cam in one of my 283's and it was a great cam. If you are not afraid of solid cams, the little duntov cam that came in the 283 HP 283 was a lumpy, cool sounding cam. I have a comp cams XE268 in my .060 over 283 in my Austin healey with 1.94 heads and it is really cool and lumpy sounding, but probably a touch too big, as it lacks the down low grunt. If you want some low end grunt, you could use a small journal 327 crank and make a 307, but the short 3" stroke of the 283 really makes a awesome revving motor....... good luck! Matt
The Jalopy Journal
