Thread: 350 to 383 coversion how to.

Tweet

Crane actually recomends going to the cam # 114132 (Powermax 2040). ($154.95 from Summit) along with Spring/retainer kit 11308-1 ($97.88 from Summit)

Cam & Lifters, CompuCam Hyd. Flat Tap., 210/216 .440/.454, SBC 305/350 1981-87

Crane CompuCam cam kits feature cams with special profiles designed to improve engine performance. And they do so without sending the computer into fits, or causing the stalling, surging, or drivability problems some "computer-compatible" cams are known for. They're 50-state legal for the applications listed.

Cam Style Hydraulic flat tappet
Basic Operating RPM Range 2,000-5,000 RPM
Intake Duration 050 inch Lift 210
Exhaust Duration 050 inch Lift 216
Advertised Intake Duration 270
Advertised Exhaust Duration 276
Intake Valve Lift with Factory Rocker Arm Ratio 0.440
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.454
Lobe Separation (degrees) 114

I ran this on DD2K and once more I saw the numbers dip lower yet. Maybe the software is flawed when trying to pick a cam with a non standard engine size? I dont know...I DD2K'ed my Ford 521and it was amazingly similar to the actual Dyno when I went to pick my engine up. Well, what do I do....trust Crane...or go with the softwares pick. Crane has been making cams since long before I was born, maybe I should just stop thinking and follow Crane's advice. Also they recomended I get the spring/retainer kit number 11308-1. Its a direct swap with the factory stuff, no machining the seats needed.