Valve Springs
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From: Fort Collins, Colorado
Valve Springs
I am going to upgrade my valve springs when i install my fpred and i was wondering what were some good brands, however my main question is what are the advantages and disadvantages to using duel springs compared to only a upgraded single spring
I think Davidbuschur posted it up several years ago.
The stock retainers are like 4 grams.
Aftermarket titanium retainers were like 2 to 3 times heavier, if I recall correctly. They are larger diameter, and not aluminum...
The stock retainers are like 4 grams.
Aftermarket titanium retainers were like 2 to 3 times heavier, if I recall correctly. They are larger diameter, and not aluminum...
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Valvetrain weight affects the natural frequency of the valvetrain system. The higher the natural frequency of the system, the faster you can open and close the valve in a controlled manner. This will allow higher engine speeds and more aggressive cam shafts.
Because the spring has a tapered profile, much less of the mass of the spring actually moves (because of the smaller diameter at the top). Not only is the retainer lighter, but the effective spring weight/inertia is also reduced.
The beehive springs don't have as high of spring pressures, but, because the parts are lighter, you don't need as stiff of a spring to maintain control over the valve. Also, with the lighter spring pressures, you have less friction and less wear on the valves/seats (provided damped motion is maintained).
Beehive springs also have higher damping characteristics then a constant diameter spring, because the tapered profile eliminates the single resonant frequency and spreads it across a larger frequency range. Dual springs are often much less about being stiffer and the second spring is actually added for damping. You can get VERY stiff single springs, but they will have a strong resonant frequency peak.
Beehive springs are a superior design compared to conventional constant diameter springs.
Because the spring has a tapered profile, much less of the mass of the spring actually moves (because of the smaller diameter at the top). Not only is the retainer lighter, but the effective spring weight/inertia is also reduced.
The beehive springs don't have as high of spring pressures, but, because the parts are lighter, you don't need as stiff of a spring to maintain control over the valve. Also, with the lighter spring pressures, you have less friction and less wear on the valves/seats (provided damped motion is maintained).
Beehive springs also have higher damping characteristics then a constant diameter spring, because the tapered profile eliminates the single resonant frequency and spreads it across a larger frequency range. Dual springs are often much less about being stiffer and the second spring is actually added for damping. You can get VERY stiff single springs, but they will have a strong resonant frequency peak.
Beehive springs are a superior design compared to conventional constant diameter springs.
Valvetrain weight affects the natural frequency of the valvetrain system. The higher the natural frequency of the system, the faster you can open and close the valve in a controlled manner. This will allow higher engine speeds and more aggressive cam shafts.
Because the spring has a tapered profile, much less of the mass of the spring actually moves (because of the smaller diameter at the top). Not only is the retainer lighter, but the effective spring weight/inertia is also reduced.
The beehive springs don't have as high of spring pressures, but, because the parts are lighter, you don't need as stiff of a spring to maintain control over the valve. Also, with the lighter spring pressures, you have less friction and less wear on the valves/seats (provided damped motion is maintained).
Beehive springs also have higher damping characteristics then a constant diameter spring, because the tapered profile eliminates the single resonant frequency and spreads it across a larger frequency range. Dual springs are often much less about being stiffer and the second spring is actually added for damping. You can get VERY stiff single springs, but they will have a strong resonant frequency peak.
Beehive springs are a superior design compared to conventional constant diameter springs.
Because the spring has a tapered profile, much less of the mass of the spring actually moves (because of the smaller diameter at the top). Not only is the retainer lighter, but the effective spring weight/inertia is also reduced.
The beehive springs don't have as high of spring pressures, but, because the parts are lighter, you don't need as stiff of a spring to maintain control over the valve. Also, with the lighter spring pressures, you have less friction and less wear on the valves/seats (provided damped motion is maintained).
Beehive springs also have higher damping characteristics then a constant diameter spring, because the tapered profile eliminates the single resonant frequency and spreads it across a larger frequency range. Dual springs are often much less about being stiffer and the second spring is actually added for damping. You can get VERY stiff single springs, but they will have a strong resonant frequency peak.
Beehive springs are a superior design compared to conventional constant diameter springs.
Good info...
Supertech single valve springs with their ti retainers. I've had them now for 28k miles with the Red and no problems. Unless you are going to upgrade to a larger turbo that will need to go above 9k RPM's, stay with the single over the duels.
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