Hello all , Working on a 283 for a 55 chevy . Im trying to to setup the car how my dad did it back in the day minus the 30-30 cam and probably stay away from the old 097 cam, Melling says the stock replacement for the 63 283 i have is : CL -CCS-2 advertised exh duration 269, advertised int. duration 258, exh duration @050 inch lift 202, exh lift .409 int, duration 194, int. lift .390 . 112 degree lobe separation hyd cam. this sound about right for the stock hyd cam that came out of the motor. Im kinda taking a page from an article written by Iskenderian about keeping the intake and exhaust lift the same and going with this summit cam : Brand:Summit Racing Manufacturer's Part Number:SUM-1787 Part Type:Camshafts Product Line:Summit Racing® Camshafts Summit Racing Part Number:SUM-1787 UPC:190861035966 Cam Style:Hydraulic flat tappet Basic Operating RPM Range:800-4,500 Intake Duration at 050 inch Lift:204 Exhaust Duration at 050 inch Lift:204 Duration at 050 inch Lift:204 int./204 exh. Advertised Intake Duration:260 Advertised Exhaust Duration:260 Advertised Duration:260 int./260 exh. Intake Valve Lift with Factory Rocker Arm Ratio:0.427 in. Exhaust Valve Lift with Factory Rocker Arm Ratio:0.427 in. Valve Lift with Factory Rocker Arm Ratio:0.427 int./0.427 exh. Lobe Separation (degrees 110 ) Camshaft Manufacturers Description:Smooth idle, makes strong low-end torque. Great upgrade for a stock engine. my question here is would this be a good cam for a little performance over stock or would i be happier with the Melling replacement ????????
There are literally a hundred different cams for the SBC,,,,,you have picked 2 different examples that will work just fine . Is there some reason you don’t want the 30-30 cam or the 097 Duntov ? Are you wanting to keep it closer to stock then ? The 283 is an excellent running engine,,,one of Chevys best really. Tommy
the 30- 30 cam is way too much for the 283 unless your up in the sky high rpm regions its not vey streetable and ive witnessed that one. the old 097 cam is very dated but as i understand worked well For Duntov for a race with that particular engine and was popular back then , however i wont be running a manual 4 speed , and i would like a bit lopey maybe but very streetable and not killing the very little low end the 283 has.
if you are going with factory heads, and exhaust manifolds, you might want to stick with the dual pattern cam. I'm to understand a dual pattern cam is better suited for stock breathing capabilities.
in short id like the engine to rev and pull good and not be over cammed so that its a stone, making it seem like a trash engine when they really are not, going for the tight reving sound of the short stroke engine that my old pops will remember from his younger days, not really for big inch punch.
Power pack heads, 2 1/2 inch rams horns / maybe sandersons, dual exhaust 4bbl carb. edelbrock performer EPS manifold.
we were also looking at TH200 4spd OD, but may opt for the 700 tho its a bit clunky for a 283 i think. unless we can steal one out of a 305 camaro
Do you know your rearend ratio? If you still have a stock rearend, then you likely have a 3.55, 3.70 or 4.10, although a 3.23 or 3.08(?) will fit from the same rearend design (up through '64).
later 69 10 bolt with a 3.55 came out of a pontiac that had a ohc 6 4bbl, had a guy help me operate on it and put the spring perches on the axle tubes. did slick work . ended up only 1/8th inch total narrower than the stock 55 rear. the guy donated the pontiac rear cuz he likes how the axles are retained on them and said it would be a good rear.
I don't know the number, But have always been a big fan of the 327/350hp L-79 cam, Great idle an excellent Street manners... Last one was a 283 9.5 Cr.
Im wanting it to pull good , but ive read you need to keep the cam out of the sky on the 283 for best results. tho ive been very tempted to grab the CS113R just to see what its like. just hate doing things twice if i dont like it or doesnt jive with the rest of the car setup.
Yeah, I've had good luck with this cam also but I used it in a 327 with a 4 speed and 4.10 gears. Was easy to drive in traffic and ran like Jack the bear...
I second the opinion on this. I have used this cam in several 283's and love it. Sounds mean idling and has decent midrange power.
I looked up the spec on that cam .... chevy pn# matches the same pn i took out what they called the 300hp cam. It shows discontinued , do you have a reference to a modern pn# that is the same? Cuz if i read it right that would be the melling cam i mentioned i think.
chevy pn# 3732798 250/300hp hyd cam 1962-1967 is what i took out of the motor, the melling cam i listed is very close to that tho it looks like they made it dual pattern. the original cam specs like this: intake lift .398 / exh. lift .398 , exh duration 267 / int duration 258 @.008 the rest of the chevy specs seem to be off in space
With a good gear in the back you won't need to be toooo concerned about a lotta cam. Think tighter LSA (110-down) for a snotty idle. Coupled with smaller duration numbers on the intake you CAN have your cake and eat-it-too! My cam guy (Delta Cams) suggested when grinding mine...... more duration on exhaust/later exhaust closing to get more of that "thump-thump sound" at idle AND gives the exhaust a little more scavenge time to clear the cylinders before the cycle starts again. Don't be afraid of trying a healthy camshaft....you can always "adjust" the cam timing (advance it a few degrees) to get back some low end IF you feel like its too sluggish. Please don't build a nice 55 for you dad that.......idles like a nice Altima! 6sally6
I will try not to ! lol I am leaning towards summit's K 1102 cam kit i think, sounds a little mean in a 283 and seems to have good response from videos ive seen with that combo. the stock chevy " 929 ' type cam would work well but be be pretty smooth, and well just be stock .