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.
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"
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.
Maybe the Edelbrock ETEC 200cc intake port volume heads?
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