For GM Duramax competition diesel
engines, Diamond has announced new 2618 billet aluminum pistons to
replace the original aluminum castings. While the truck-pull arena
will be the main draw, these new pistons will also prove useful for
ambitious weekend warriors, engaging in drag racing, off-roading and
towing. But it is in the cut and thrust of truck pulling where
Diamond believes these pistons will excel. As boost pressures exceed
50psi and billet aluminum blocks demonstrate their strength, Diamond
has aimed for maximum structural integrity. They promote robustness
throughout the full architecture of the piston, particularly the
crowns and pin bosses, and they transfer the forces to the connecting
rods via Trend's herculean H13 tool steel pins.
To resist high temperatures and
pressures Diamond administers its hard-anodizing process to the
complete piston. To combat potential piston damage from side loading
and piston rock they apply a molybdenum coat to its skirt.