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Old 06-18-2003, 10:13 PM
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383 build up

I am planning to purchace a 383 shortblock from Speed-o-motive. The shortblock has KB pistons and is rated about a 9.6:1 compression ratio with the 67cc heads. I am also planning to put world products s/r torquer head with 202 valves. I am stuck what cam specs i should go for. I want no less than 400 horeses put dont want to go overkill. I need it to be streetable because it will be driven daily. so i need relatively good idle, vacum, etc. If anyone has any suggestions or has built one before please help me out. Also what cfm carb should i go with to work with the cam.

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Old 06-18-2003, 11:31 PM
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David Vizards article "pocket change stroker" suggests the use of a cam with a 108 lobe centerline, as it will benefit the 383`s power band. Isky Cams offers a wide selection of 108 centerline cams. i`d go with a cam with 224 - 228 duration @050, but keep in mind you`ll need a stall converter if your running a automatic with a cam slightly over 224 duration. a 700 to 750cfm carb will suit your combo fine. I wouldn`t worry with 400 horses, on the street i`d want 400 ft lbs of torque, and torque is what the 383 does best, it`s not often you`ll be revving it on the street, and horsepower is upper RPM power, torque is what you feel out of the hole.
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Old 06-18-2003, 11:41 PM
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crower made a good cam that i used for my 383 that had good all around torq hp and ran somewhat smooth little lope idle and i was happy with i think it was around 232@50 488 lift 110 sep and a 750 carb good flowing heads intake and header youll be well over 400 torq
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