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Here are two new forged pistons for nitrous engines, which share similar properties: One is designed for a 23-degree small-block Chevy; the other for a big-block Chevy 540-632CID with Ray Franks’ Profiler Hit-man cylinder heads. In both examples, Diamond has provided hefty skirt walls and piston crowns, stout wrist pin bosses and trusses with adequate load paths, and a rigid shell to prevent piston deflection.
To absorb the shock loadings, they supply these pistons with Trend wrist pins made from H13 Tool Steel. The wall-thicknesses of the pins are made to customers’ specifications. This useful option is determined by how much power the engine will make and how much nitrous will be consumed. Fourteen gas ports placed around the perimeter of the piston crowns allow combustion pressures to travel downward and behind the top ring, forcing the ring out onto the cylinder wall and providing maximum ring seal. Finally, Diamond offers these pistons in either a natural alloy finish or coated. Their in-house barrier coatings consist of hard-coat anodizing (impregnated into the full piston body), ceramic coatings applied to the piston crowns, and molybdenum-based skirt coatings (to reduce friction and scuffing).
For further information visit Diamond Pistons online at DiamondRacing.net.
For more information, go to www.moroso.com.
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