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Valves Supertech 3SGTE
KORacing Products » Toyota MR2 MK2 » Engine Components

ENGINE VALVE TECHNOLOGY
Supertech uses their experience of more than 20 years int he manufactings of racing valve, along with the application of computerized Finite Element Analysis (FEA). They do intensive testing and work very very closely with many engine builders in order to continuously improve and provice the market with the best possible product for every application. High flow rates, durability, and quality are of great concern at Supertech. All valves are swirl polished, have the stems undercut, and hardened tips.

MATERIALS
Supertech manufactures racing valves in many different materials like Stainless Steel Alloys, Nimonic, Inconel, Titanium, etc. There are different alloys, heat treatments, and coatings used for different applications. For most of the alloys Supertech follows the specifications under SAE standard J775.

STAINLESS STEEL ALLOYS
Made as a one piece forged valve for higher strength and reliability. Supertech uses mostly EV8 (21-4N) for intake and exhaust valves. Other hard metal alloys may be welded to harden certain areas like the tips, or seat mating surfaces.

BLACK NITIRIDE COATING
This coating is a hardening treatement that even though it is not widely used as chrome, has several benefits and is becoming very popular in European and Japanese applications. The microhardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer (microharness is 800HV minimum). Surface finish is smoother than with chromed stems, having less friction between the stem and the valve guide. The valve seat surface is harder with the nitrided layer, lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. This mataches with any kind of seat material (nodular iron seats, steel powder metals seats, hard aluminum-copper seats, or beryllium copper seats). Engines reaching higher RPMs take full advantage of these features. The higher the engine speed, the bigger the power loss due to internal engine friction. The black nitride layer reduces this power loss due to it's lower friction characteristics. In the worst situations, even with valve to piston contact, the Black Nitride layer willnot flake or brake because it is ahdered to the base material at a microscopic level.


$310.00 per Set
Valves:
 

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