The Ultimate Guide to the Chevy 383 Stroker

Here is the 570hp engine on the dyno at Westech. Note that the dyno test used a set of Westech's 13/4-inch dyno headers fitted with a set of 18-inch-long, 3-inch-diameter collector extensions. The power numbers would be lower with real 13/4-inch chassis headers and a full exhaust system.

Here is the 570hp engine on the dyno at Westech. Note that the dyno test used a set of Wes

Wild-570HP 383
Here's where the fun really begins. This engine started life as a pedestrian one-piece rear main seal motor that now has a complete Lunati 4340 steel crank rotating package complete with I-beam Lunati Pro Mod rods and forged flat-top Wiseco pistons. We dropped on a set of Dart CNC 227cc heads that helped produce a 10.9:1 compression ratio. Then we added in an aggressive Comp Cams XR-292 mechanical roller cam with (count 'em!) 36 more degrees of duration at 0.050 than the mild combination. Topping off this thumper is a Holley-Dorton single-plane intake and a Holley 750 Street HP carb. Routing the exhaust was the responsibility of a set of Hooker 13/4-inch headers. The final piece was a Wilson 1-inch tapered spacer that on this particular combination was worth a solid 23 hp from 548 to 571 hp. Peak torque occurred at 5,100 rpm. This is a beast in small-block clothing, but with a distinctive idle lope, there's little chance of disguising this small-block as anything less than a contender. If horsepower makes your toes tingle, this is the combo for you. We've actually discussed pushing this beast a little harder to see if we could hit 600 hp. If you like that idea, compose a sell job and convince us this needs to be done. We love it when you talk horsepower.

By Jeff "Smith,"

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