Valves? Ferrea vs Omni?
03-07-2008, 02:21 PM
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Valves? Ferrea vs Omni?
I am building turbo B16. Which valves are better - Ferrea Competition Plus Valves or Omni's valves? Why?
Ferrea:
Ferrea Competition Plus Valves have built a reputation as the industry's most reliable extreme duty valve. We, at Ferrea, are dedicated to providing the absolute best product on the market.
Our extensive R & D programs provide tehcnological gains, which are implemented in each of our competiton plus valves. They are engineered for higt rpm, high horsepower racing engines, and are chose by many top NASCAR, Drag, and Oval & Sprint Car-racing teams.
To manufacture the valves we use special aerospace quality alloys, including EV8-Z18, which provides high tensile strength. An exclusive two-step slow forging process ensures proper grain flow and virtually eliminated any damage to the material structure. The valves are then heat treated and stress-relieved over a 48-hour period, which is the crucial base of our molecular integrity. These valves feature avionics-quality hard chrome along with a specially applied hard tip. Our engineering staff at Ferrea spends countless hours conducting flow bench tests to achieve an optimum balance of flow, velocity and efficiency in the design of this valve. As a result, these valves incorporate smoother radiuses and unique undercuts. These exclusive features are what make the Ferrea Competition Plus Valves unequaled in performance and reliability!
Ferrea is once again setting the pace with its Competition Plus PQ Series Exhaust Valves, the next generation of exhaust valve technology.
Due to the evolution in today's competition engine applications, temperatures are increasing and as a result, longevity is decreasing. Therefore, Ferrea is pleased to introduce our NEW! Competition Plus PQ Series Valve.
This is a next generation exhaust valve made of an Ultra High Strength, High Temp Nickel Stainless Stell Alloy. Ferrea first used this material with great success during the development of a very high stress, high temp endurance racing program.
This PQ Series next generation exhaust valve material will progressively replace Competition Plus Series valves as applications evolve and the material becomes necessary.
Listed below are some qualities of the Next Generation Exhaust Valve material:
Tensile strength increased by 20% at high temperature
Fatigue resistance increased by 20%
Valve seat life increased by 25%
Omni:
Omni-Power valves are constructed with both performance and OEM reliability in mind. Our intake valve is a 1 piece forging using Japanese SUH-11 stainless steel. This material is suitable for both high temperatures and has the hardness required to prevent the valve tip from mushrooming during extreme use. Our exhaust valve is a 2 piece friction welded forging that uses an NCF-751 Inconel head, mated to an SUH-11 stem. This provides the ultimate combination of material for both extreme temperatures and valve stem tip fatigue resistance. A flat bottom design is used to increase compression ratios by .3-.5 depending on engine size. Omni-Power valves are much stronger and last longer than EV-8 valves as well as many other aftermarket valves. Omni-Power valves are also available in standard compression for N/A and Turbo applications.
Ferrea:
Ferrea Competition Plus Valves have built a reputation as the industry's most reliable extreme duty valve. We, at Ferrea, are dedicated to providing the absolute best product on the market.
Our extensive R & D programs provide tehcnological gains, which are implemented in each of our competiton plus valves. They are engineered for higt rpm, high horsepower racing engines, and are chose by many top NASCAR, Drag, and Oval & Sprint Car-racing teams.
To manufacture the valves we use special aerospace quality alloys, including EV8-Z18, which provides high tensile strength. An exclusive two-step slow forging process ensures proper grain flow and virtually eliminated any damage to the material structure. The valves are then heat treated and stress-relieved over a 48-hour period, which is the crucial base of our molecular integrity. These valves feature avionics-quality hard chrome along with a specially applied hard tip. Our engineering staff at Ferrea spends countless hours conducting flow bench tests to achieve an optimum balance of flow, velocity and efficiency in the design of this valve. As a result, these valves incorporate smoother radiuses and unique undercuts. These exclusive features are what make the Ferrea Competition Plus Valves unequaled in performance and reliability!
Ferrea is once again setting the pace with its Competition Plus PQ Series Exhaust Valves, the next generation of exhaust valve technology.
Due to the evolution in today's competition engine applications, temperatures are increasing and as a result, longevity is decreasing. Therefore, Ferrea is pleased to introduce our NEW! Competition Plus PQ Series Valve.
This is a next generation exhaust valve made of an Ultra High Strength, High Temp Nickel Stainless Stell Alloy. Ferrea first used this material with great success during the development of a very high stress, high temp endurance racing program.
This PQ Series next generation exhaust valve material will progressively replace Competition Plus Series valves as applications evolve and the material becomes necessary.
Listed below are some qualities of the Next Generation Exhaust Valve material:
Tensile strength increased by 20% at high temperature
Fatigue resistance increased by 20%
Valve seat life increased by 25%
Omni:
Omni-Power valves are constructed with both performance and OEM reliability in mind. Our intake valve is a 1 piece forging using Japanese SUH-11 stainless steel. This material is suitable for both high temperatures and has the hardness required to prevent the valve tip from mushrooming during extreme use. Our exhaust valve is a 2 piece friction welded forging that uses an NCF-751 Inconel head, mated to an SUH-11 stem. This provides the ultimate combination of material for both extreme temperatures and valve stem tip fatigue resistance. A flat bottom design is used to increase compression ratios by .3-.5 depending on engine size. Omni-Power valves are much stronger and last longer than EV-8 valves as well as many other aftermarket valves. Omni-Power valves are also available in standard compression for N/A and Turbo applications.
03-07-2008, 02:57 PM
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Re: Valves? Ferrea vs Omni? (blinx9900)
But omni's exhaust valves head are made of NCF-751 Inconel (Nimonic). It is the best for exhaust valves.
03-07-2008, 09:46 PM
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Re: Valves? Ferrea vs Omni? (xenocron)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xenocron »</TD></TR><TR><TD CLASS="quote">Ferrea has a much higher quality valve...</TD></TR></TABLE>
03-07-2008, 09:56 PM
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Re: Valves? Ferrea vs Omni? (HamiltonRex)
Supertech, hands down. Stainless steel but with a nitride coating so safe with stock valveguides so you don't have to use the fast wearing aftermarket valveguides. 
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03-09-2008, 12:28 PM
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Re: Valves? Ferrea vs Omni? (xenocron)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xenocron »</TD></TR><TR><TD CLASS="quote">Ferrea has a much higher quality valve...</TD></TR></TABLE>
Based on what metallurgical facts?
Based on what metallurgical facts?
03-10-2008, 11:50 AM
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ive had customers provide many sets of ferrea's and really like them. they're ground from the stem to the backcut and are always consistent when spun (no runout anywhere, not just on the seat cut).
quite a few of the budget valves ive seen are forged and left unground so that while the seating face (45*) is concentric to the stem and the face is square, the back face of the valve is offset and will dance around when spun. this will bias flow in the port if the valve rotates in the guide.
ive also somewhat recently see big name valve springs and retainers where the retainer wouldnt fit inside the spring. standard diameter shoulder on the retainer but the spring ends were unchamfered.
ive just stuck to ferrea for the quality.
Modified by mike_belben@yahoo.com at 5:10 PM 3/10/2008
quite a few of the budget valves ive seen are forged and left unground so that while the seating face (45*) is concentric to the stem and the face is square, the back face of the valve is offset and will dance around when spun. this will bias flow in the port if the valve rotates in the guide.
ive also somewhat recently see big name valve springs and retainers where the retainer wouldnt fit inside the spring. standard diameter shoulder on the retainer but the spring ends were unchamfered.
ive just stuck to ferrea for the quality.
Modified by mike_belben@yahoo.com at 5:10 PM 3/10/2008
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