We know we were, with a production iron-head 318 at near 1.23hp per cube with a street hydraulic cam. The engine had over 10.5 inches of vacuum at a 900-rpm idle, but just enough rump to get noticed.

While small displacement engines like the 318 normally respond to less lobe separation, shorter duration and higher lift camshafts, supercharged engines generally require a wider lobe separation ...