[Steve C.]

Example for interest....

4.212 bore
4.250 stroke
6.8 rods
473 CID
Edelbrock heads- rated 316 cfm at .700"
2.110 / 1.770 valves
9.95:1 compression
Comp hydraulic roller cam
242 / 248 at .050
0.540 / 0.562* lift w/ 1.5 rocker ratio
Victor intake w/ 1-inch open spacer / BG 850 carb
1.750" headers
92-octane fuel

588 ft.lbs torque at 4700 rpm
578 hp at 5500 rpm

After digesting the results, David Butler comments, "The numbers look very good. We've seen 600 hp and 600 lb-ft of torque, sometimes slightly more from this combination with compression toward 11.5:1, which should operate suitably on 92- to 93-octane fuel with the aluminum heads. This wasn't a 'dyno' combo, however, which might typically include borderline compression, a huge camshaft, and a large carburetor. Instead, we took a conservative approach based on the vehicle's intended use."


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