camshaft help
#1
camshaft help
well guys, since i have the topend off of my new LT1 block (not rebuilt, 72k on the block) I am going to put in a cam since i am putting my heads on (stock 643 castings)
Obviously, I am looking at mild cams that will give decent performance
idc about idle quality, it can be the roughest idle in the world, i will put up with it
couple choices are
cam 1:
Basic Operating RPM Range: 1,800-5,800
Duration at 050 inch Lift: 219 int./227 exh.
Advertised Duration: 270 int./278 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.515 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.530 in.
Lobe Separation (degrees): 112
cam 2:
Basic Operating RPM Range: 2,000-6,000
Duration at 050 inch Lift: 210 int./224 exh.
Advertised Duration: 272 int./286 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.479 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.518 in.
Lobe Separation (degrees): 112
cam 3:
Basic Operating RPM Range: 1,500-5,500
Duration at 050 inch Lift: 218 int./218 exh.
Advertised Duration: 286 int./286 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.525 int./0.525 exh. lift
Lobe Separation (degrees): 112
cam 4:
Operating range: ???
211/219 duration @ .050 .530"/.560" with 1.6 rocker
what would u guys recommend? Its a stock bottom end, i will do 1.6 roller rockers, just wondering what u guys think of those, since i am no cam expert and they all appear to be pretty mild cams
Obviously, I am looking at mild cams that will give decent performance
idc about idle quality, it can be the roughest idle in the world, i will put up with it
couple choices are
cam 1:
Basic Operating RPM Range: 1,800-5,800
Duration at 050 inch Lift: 219 int./227 exh.
Advertised Duration: 270 int./278 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.515 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.530 in.
Lobe Separation (degrees): 112
cam 2:
Basic Operating RPM Range: 2,000-6,000
Duration at 050 inch Lift: 210 int./224 exh.
Advertised Duration: 272 int./286 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.479 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.518 in.
Lobe Separation (degrees): 112
cam 3:
Basic Operating RPM Range: 1,500-5,500
Duration at 050 inch Lift: 218 int./218 exh.
Advertised Duration: 286 int./286 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.525 int./0.525 exh. lift
Lobe Separation (degrees): 112
cam 4:
Operating range: ???
211/219 duration @ .050 .530"/.560" with 1.6 rocker
what would u guys recommend? Its a stock bottom end, i will do 1.6 roller rockers, just wondering what u guys think of those, since i am no cam expert and they all appear to be pretty mild cams
#2
unless you want to change your stall (if its automatic) then you'll probably want to go with cam choice #3, but as far as mild cam's go, i'd chose between your #3 and #1 picks, just depends on the specific recommendations to accomidate either cam (exhuast work, tune, etc) and the ammount of mods you want to put in it before you finish the 383
#5
They are all good. If you don't care about the idle, go with the bigggest duration for more top end. I run the 210/224 from Crane. It idles like stock, but a real stump puller, keeping the torque down low to mid. I have an M-6 though.
#7
i'm just not sure about spinning the bottom end that high though otherwise i would have it by now haha
#9
I'm going to go with the ZZ3 cam myself. Here are the numbers on it:
Peak Power: ~5400 rpm
Dur, at .050 IN=208 EX=221
Lift with 1.5 rockers IN=0.474 EX=0.510
lift with 1.6 rockers IN=0.506 EX=0.544
I'd use the thin head gasket too, and make sure you get springs to match what ever choice you make.
Peak Power: ~5400 rpm
Dur, at .050 IN=208 EX=221
Lift with 1.5 rockers IN=0.474 EX=0.510
lift with 1.6 rockers IN=0.506 EX=0.544
I'd use the thin head gasket too, and make sure you get springs to match what ever choice you make.
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