Spring rates?
#21
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Originally posted by Resolute
Front ratio is 0.79. What do you mean about coil-overs having a motion ratio of 1?
Front ratio is 0.79. What do you mean about coil-overs having a motion ratio of 1?
How does that work with the rear motion ratio at .36? Does that mean that if a 100lbs spring rate is in place that the effective leverage applied at the wheel equal's a 36lbs spring rate at the wheel and the same spring at the front leverages 79lbs?
#23
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Originally posted by Gsedan35
Yeah that doesn't make sense to me. Even the Cusco coilovers use the oem rear spring location, not on the dampner body (saw them with my own eye's at a meet).
Yeah that doesn't make sense to me. Even the Cusco coilovers use the oem rear spring location, not on the dampner body (saw them with my own eye's at a meet).
How does that work with the rear motion ratio at .36? Does that mean that if a 100lbs spring rate is in place that the effective leverage applied at the wheel equal's a 36lbs spring rate at the wheel and the same spring at the front leverages 79lbs?
EDIT: I'm a retard and couldn't figure out quotes
Last edited by Resolute; 02-24-2004 at 10:40 AM.
#25
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Originally posted by dwnshift
From the informations I have received in our quest for a spring package with the Konis...
The Eibachs are actaully about 85-90% linear
rates are 387 front and 430 rear.
The OEM rear rate is 340ish.
From the informations I have received in our quest for a spring package with the Konis...
The Eibachs are actaully about 85-90% linear
rates are 387 front and 430 rear.
The OEM rear rate is 340ish.
#29
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The rates coming off BJ's spring tester differing from the rates I got, made me curious. I dusted off my boxed set of oem 2003 350Z springs and had another look. I hadn't written down all the previous measurements, so I measured them again, and again, and again,.........you get the idea. And this time I did not ask for someone else to do the rate math, found this neat web site that does it. http://www.racingpc.com/tips/coils-springs.htm
Front springs:
33/64" wire diameter (measured on all active coils)
spring Outside Diameter 4.5"
Number of active coils 5
Spring rate 314lbs
*******************************************
Rear springs:
35/64" wire diameter (measured on all active coils)
spring Outside Diameter 5.0625"
Number of active coils 4
Spring rate 342lbs
So needless to see, I have new oem rates.
314/342
Front springs:
33/64" wire diameter (measured on all active coils)
spring Outside Diameter 4.5"
Number of active coils 5
Spring rate 314lbs
*******************************************
Rear springs:
35/64" wire diameter (measured on all active coils)
spring Outside Diameter 5.0625"
Number of active coils 4
Spring rate 342lbs
So needless to see, I have new oem rates.
314/342
#30
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Thanks Gsedan35.
It didn't make sense that Eibach would end up at a similar rate to the OEM springs. They usually end up 20-25% stiffer than OEM.
It didn't make sense that Eibach would end up at a similar rate to the OEM springs. They usually end up 20-25% stiffer than OEM.
Last edited by Zship; 03-03-2004 at 10:12 AM.
#32
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Originally posted by jchen1020
Anyone heard of B&G Spring?
What is the Spring rate on that?
Anyone heard of B&G Spring?
What is the Spring rate on that?
If you want to find out the B&G rates I suggest that you give them a ring. Do not accept a generic "oh they are 20% stiffer". You need to know the specific rates or the info is totally uselesss.
Last edited by Gsedan35; 12-07-2004 at 11:37 AM.
#33
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Originally posted by Gsedan35
I haven't bothered to call them, so I don't have their rates. They did tell me spring rates in the past, but so did Sprint, who now refuse to give out rates. H&R is another company that refuses to give out rates. If they can't give that out, how can anyone make a informed buying decision, just a shot in the dark, I don't think so.
If you want to find out the B&G rates I suggest that you give them a ring. Do not accept a generic "oh they are 20% stiffer". You need to know the specific rates or the info is totally uselesss.
I haven't bothered to call them, so I don't have their rates. They did tell me spring rates in the past, but so did Sprint, who now refuse to give out rates. H&R is another company that refuses to give out rates. If they can't give that out, how can anyone make a informed buying decision, just a shot in the dark, I don't think so.
If you want to find out the B&G rates I suggest that you give them a ring. Do not accept a generic "oh they are 20% stiffer". You need to know the specific rates or the info is totally uselesss.
#34
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Spring Rates
Why is it "Linear" Spring rates are preferable to "Progressive" Spring rates. I know the difference but not sure why one is preferred over the other. Racing application versus a street application?
Thanks
Major
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Major
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