524 Chevy Small Block Engine - Dyno Chart - 'Horse Power!

3.Roller Egos
Behind the beltdriven MSD distributor is a mechanical-roller LSM Systems Engineering cam with 286/310 degrees of duration at 0.050-inch tappet lift and an equally egotistical 0.525-inch lobe lift. With 1.85:1 rockers, this calc's out to a yardstick-like 0.971-inch valve-lift number. That, gentle readers, is just shy of 1-inch. Original-diameter lifters for a small-block are 0.842 inch, but these babies are a full 0.937 inch in diameter with a built-in keyway to make life a little easier on the roller tappets.

4.Do The Splits
Sonny's also built this sheetmetal intake that mounts a pair of Bo Laws Products (BLP) split Dominator carburetors. If that's not enough, look closely and you'll find three stages of SpeedTech nitrous plumbed into each individual runner in the manifold. With this much plumbing, the only limit on horsepower might be the owner's willingness to pill it up. Certainly a 500hp shot would probably not tax this system.

5.Heads Will Roll
The GM Performance Parts RO7 heads started out as semifinished castings from GM and were ported by Sonny's and outfitted with equally steroid-enhanced 2.330/1.650-inch titanium valves using spindly 0.311-inch-diameter valve stems. The stock chamber size on these heads is 40 cc, but these have been milled to bump the compression up to 13.3:1. The valvetrain includes a complete Jesel shaft-rocker system with 1.85:1 rockers and 11/42-inch-diameter Trend pushrods.

6.Lubrication
Moroso is in charge of all things regarding lubrication, including the four-stage dry-sump system, the oil pan, and even the vacuum pump sitting just underneath the Meziere electric water pump. For spark, the ATI balancer drives a complete MSD crank-trigger system including the beltdriven distributor. How long do you suppose it will be before racers start putting distributorless ignition systems in engines like these?