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Old 11-10-2011, 02:33 PM
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Need suggestions for my 383 build

Here is what I am planning so far. My main concern at this point is the cam. Any suggestions? This is for a heavy street/light strip car. Likely will be a '79 Olds Cutlass or late '70's Camaro.

CYLINDERS 8
BORE 4.030 in. DISPLACEMENT 383 cid
STROKE 3.750 in. PISTON HEIGHT 9.005 in.
ROD 6.000 in. DECK 9.013 in.
COMPRESSION HEIGHT 1.130 in. COMPRESSION RATIO 10.6 :1
HEAD VOLUME (cc) 64.000 cc DYNAMIC COMPRESSION 8.3:1
PISTON HEAD VOLUME (cc) 7.000 cc HEAD GASKET BORE 4.100 in.
GASKET THICKNESS (COMP.) 0.040 in.
DECK CLEARANCE 0.008 in.

CAM- EDELBROCK 2201 ROLLIN' THUNDER HYD ROLLER
INTAKE DURATION 234 ⁰ @ 0.050" INT ROCKER ARM RATIO 1.5 :1
EXHAUST DURATION 238 ⁰ @ 0.050" EXH ROCKER ARM RATIO 1.5 :1
INTAKE CENTER 107 ⁰
LOBE SEPERATION 112 ⁰
INTAKE MAX LIFT 0.539 in. INTAKE LOBE HEIGHT 0.359 in.
EXHAUST MAX LIFT 0.548 in. EXHAUST LOBE HEIGHT 0.365 in.
INTAKE OPEN @.050 10 ⁰BTDC IDLE VACUUM @ 1000 RPM 12 in.
INTAKE CLOSE @.050 44 ⁰ABDC
EXHAUST OPEN @.050 56 ⁰BBDC
EXHAUST CLOSE @.050 2 ⁰ATDC

HEADS- EDELBROCK 60899 PERFORMER RPM
INTAKE VALVE 2.020 in.
EXHAUST VALVE 1.600 in.
INTAKE RUNNER 185.000 cc
EXHAUST RUNNER 65.000 cc
MAX LIFT 0.575 in.

"CARBURETOR-750 CFM Four Barrel Street Carburetor HOLLEY 0-80508S
PART #: 0-80508S"
CHOKE ELEC.
SENCONDARY VACUUM
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Old 11-25-2011, 12:55 PM
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You have nice set up but my main concern on this would be the heads. I think That with anything above 355 CI, and with the parts and compression you have, I would have gone to a bigger runner head. Something like a 200cc head, or at least 190cc. With that smaller runner this engine will be a torque motor for sure. But at the track will struggle at the top end. Big cubic inch small block need more air in to breathe and perform well.
Also, try a Holley 750, with vacuum secondaries.
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Old 11-25-2011, 10:06 PM
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Maybe the Edelbrock ETEC 200cc intake port volume heads?

peace
Hog
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