||Supertech Performance Valves
- High Flow Rates
- Less Friction
- More Power
Featuring Black Nitrided Treatment!
Supertech Extreme Flow Performance Valves
for Pro Street
and Racing are engineered for High RPM and High HP. Extreme Flow
Valves outperform any other valve on the market today, and with
their Nitride Coating are perfect for High Temperatures (and run
cooler which improves value life), Nitrous, Turbos and
Superchargers. For naturally aspirated motors these valves will give you a
much greater cylinder flow for good HP gains.
Intake and Exhaust Valves are One Piece Forged, High Temperature,
High Nickel, Stainless Steel Alloy. Valves are CNC finished to
strict tolerances making these valves the choice for the most
demanding race classes.
Three Types of Valves Available:
(color coded in TYPE column for easy reference)
#1) Black Nitride (Coating):
Part # ending in "N"
The micro-hardness is higher than the stainless steel base
material, keeping good ductility beneath the hard nitrided layer
(micro-hardness is 800HV minimum). Surface finish is smoother than
with chromed stems, having less friction between stem and guide.
Valve seat surface is harder with the nitrided layer, lasting
longer with lead free fuels, alcohols, nitro or other "explosive"
mixes. Matches any kind of seats (nodular iron seats, steel powder
metal seats, hard aluminum-copper seats or beryllium copper
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 less valve-guide friction.
The nitrided layer is adhered to the base material at a
microscopic level, so does not "flake" or brake when the valves
bend due to impacts with the pistons. ---
The Black Nitride applies to the whole valve while the chrome
coating is only applied to the stem. All valves are swirl
polished, have stem undercut and a hardened tip
#2) Chrome (special coating used only as noted):
Part # ending in "C"
Widely used and known in high performance valves Only applied to
#3) Inconel (special valve material used only as noted):
Part # ending in "I"
Inconel 751/Nimonic - These Nickel based alloy materials are used
for Exhaust valves in engines that reach very high temperatures
and its use is growing with the application of turbos and