what do we need the spring/retainers for??
what do we need the spring/retainers for??
and the supertec ones from zzp????
for some reason i keep hearing about them and either i was dreaming or what but cant remember why we would need them??? mabe cuz of the power we make.
help its driving me crazy
for some reason i keep hearing about them and either i was dreaming or what but cant remember why we would need them??? mabe cuz of the power we make.
help its driving me crazy
Higher RPMS, boost, or different cams could all be a good reason for a spring swap. Some of the guys turning too many rpms are having issues with springs not returning quick enough, which is why the cars are throwing rocker arms.
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Joined: 04-12-09
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From: Connecticut
a higher valve spring rate decreases the chance of what's called "valve float" in the higher rpm range (in our case 7k+ like sweetsandman stated).
Valve float is basically when the cam lobes are spinning fast enough to the point where the valve springs are no longer able to keep up with opening and closing the valves correctly causing a "floating" in rockers and ultimately causing the valves to basically never completely close properly. This increased spring rate allows the rockers to stay afixed to the cam lobe or lifter (depending on what application we're talking about here) correctly, decreasing the chance of float up to a certain rpm range depending on the spring rate you're working with. This increased spring rate does however put more stress on the valvetrain resulting in potential rocker arm damage if the spring rate is too stiff for the application and the rocker arms are not strong enought to handle the punishment. 78# springs in our valvetrain should not give any cause for concern though. I was just throwing it out there just in case someone decided to throw a rediculous spring rate in the head
Valve float is basically when the cam lobes are spinning fast enough to the point where the valve springs are no longer able to keep up with opening and closing the valves correctly causing a "floating" in rockers and ultimately causing the valves to basically never completely close properly. This increased spring rate allows the rockers to stay afixed to the cam lobe or lifter (depending on what application we're talking about here) correctly, decreasing the chance of float up to a certain rpm range depending on the spring rate you're working with. This increased spring rate does however put more stress on the valvetrain resulting in potential rocker arm damage if the spring rate is too stiff for the application and the rocker arms are not strong enought to handle the punishment. 78# springs in our valvetrain should not give any cause for concern though. I was just throwing it out there just in case someone decided to throw a rediculous spring rate in the head
a higher valve spring rate decreases the chance of what's called "valve float" in the higher rpm range (in our case 7k+ like sweetsandman stated).
Valve float is basically when the cam lobes are spinning fast enough to the point where the valve springs are no longer able to keep up with opening and closing the valves correctly causing a "floating" in rockers and ultimately causing the valves to basically never completely close properly. This increased spring rate allows the rockers to stay afixed to the cam lobe or lifter (depending on what application we're talking about here) correctly, decreasing the chance of float up to a certain rpm range depending on the spring rate you're working with. This increased spring rate does however put more stress on the valvetrain resulting in potential rocker arm damage if the spring rate is too stiff for the application and the rocker arms are not strong enought to handle the punishment. 78# springs in our valvetrain should not give any cause for concern though. I was just throwing it out there just in case someone decided to throw a rediculous spring rate in the head
Valve float is basically when the cam lobes are spinning fast enough to the point where the valve springs are no longer able to keep up with opening and closing the valves correctly causing a "floating" in rockers and ultimately causing the valves to basically never completely close properly. This increased spring rate allows the rockers to stay afixed to the cam lobe or lifter (depending on what application we're talking about here) correctly, decreasing the chance of float up to a certain rpm range depending on the spring rate you're working with. This increased spring rate does however put more stress on the valvetrain resulting in potential rocker arm damage if the spring rate is too stiff for the application and the rocker arms are not strong enought to handle the punishment. 78# springs in our valvetrain should not give any cause for concern though. I was just throwing it out there just in case someone decided to throw a rediculous spring rate in the head
And the springs are no guarantee for an over-rev situation.
I also read somewhere that someone wanted to put a 98# spring in there...
yeah the friggen 98 post i saw that lol ment for real hi boost and alot of other thigs done. but yeah so right now im at 6800 rpms and heve to go see BYT for a retune and a little more aggesive tune so would these be a good buy than???
Springs would be beneficial on a stock turbo just as much as they would be on a larger turbo. Valve train issues can happen with or without excessive RPMs. Once you exceed the springs ability to control the valves (via power, valve lift/ramp rates or RPM), you get valve float or excessive bouncing of the valves which will wear on the seats and eventually not allow the valve to fully close.
I never reved it that high on stock turbo cause it seemed to run out of power but he ^ is right it would make it safer. Hell I don't have them now and i'm right around 450hp but my car never goes above 6500rpm.. Its next on the list though cause it can't be good lol.
I never reved it that high on stock turbo cause it seemed to run out of power but he ^ is right it would make it safer. Hell I don't have them now and i'm right around 450hp but my car never goes above 6500rpm.. Its next on the list though cause it can't be good lol.
I agree but i want to do everthing at once unless it breaks and i have all this power so i don't have to rev the **** out of it.
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Joined: 05-27-09
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From: In the mountains
In many cases, wheelspin and momentum will allow the car to exceed the redline, sometimes by quite a bit. It doesn't take much to allow a rocker to hop out if the valve is floating. I saw upwards of 8K rpms when I had the limiter set at 7400 on my datalogs if the car was spinning through 1st.
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Joined: 05-27-09
Posts: 2,803
Likes: 1
From: In the mountains
In many cases, wheelspin and momentum will allow the car to exceed the redline, sometimes by quite a bit. It doesn't take much to allow a rocker to hop out if the valve is floating. I saw upwards of 8K rpms when I had the limiter set at 7400 on my datalogs if the car was spinning through 1st.
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