Thread: Cam Duration?
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Old 11-30-2003, 05:23 AM
Jim Downard Jim Downard is offline
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Join Date: Jul 2000
Location: Bremen, OH
Cobra Make & Engine: Classic Roadsters, 393 stroker, Tremec 3550, about 425 hp, MDA GT40 289
Posts: 179
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Jerry,
I've got a 393W stroker. It has Roush 200 heads in cast iron flavor, 9:1 compression, and fairly stock bottom end. Don Scott told me what cam to use in this car, and I think he was right. It's a competition cams with a lift of .544/.541 and a duration @ .050 of 246. It doesn't like being driven much below 1900-2000 rpm but it can if throttle is controlled nicely. I had the car on the chassis dyno at the spring fling this summer and with a 3.55:1 rear axle ratio I made 360 rwhp and 398 lbs. ft. of torque from 2750 to about 5000 rpm. The torque curve is as flat as a pancake and the hp is a very linear curve upward. This is a very controllable motor that STILL spins the rear tires in thrid gear when the meat of the power comes in.

Jim Downard
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