Nissan RB25NEO Ross Racing Forged Pistons

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Nissan RB25NEO Ross Racing Forged Pistons

Ross Racing Pistons Feature:

These Pistons are custom made for Spool and rated at 900-1000hp by Ross Racing Pistons.
With upgrade pins Ross rate these pistons up to 250 bhp per cylinder.
  • Compression Ratio: 9.0:1
  • Bore Sizes: 86.5mm and 87mm
  • Pistons come with NPR Gas Nitrided top ring, three pcs. oil
  • 0.225” wall Carbon steel (upgrade to H13 available)
  • Forged 2618
  • Locks

All of Ross Racing Pistons (since 1985) have been forged from 2618 billet bar stock and have been heat treated and aged to a T61 condition (2618-T61). 2618-T61 is the material that is used when fatigue resistance and durability are of prime importance by all premium racing piston manufacturers.

This material has less than 1% silicon particulate content. High silicon content pistons (forged from 4032 or MS75) will not stand up to the most extreme stress placed on many racing pistons. If a crack starts to form in a high silicon piston it will continue until the piston experiences a catastrophic failure. Simply stated, adding sand to the aluminum only makes it more brittle. In the rare instance of a 2618-T61 piston cracking, the crack will continue to an area where the stress is not as great and will then stop. Another advantage of 2618-T61 over the high silicon pistons is the ability to keep its shape under extreme pressure and high RPM's. "Skirt Shrinking" is not a problem with ROSS Racing Pistons.

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