Ralliart Suspension Upgrade
Aug 19, 2011, 03:21 PM
#31
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Which brings us back to my original statement:
FYI, we aren't using the same unit of measure. I don't think there is any such thing as 3500lb/in spring rate. SUPER stiff track springs are 16K which 896lb/in; so 3500 lb/in would be...62.5K kinda absurd ;p
When talking spring rates any "xx"K is kg/mm, not 1000's of lbs/in (we aren't compacting the car into a soda can, haha)
FYI, we aren't using the same unit of measure. I don't think there is any such thing as 3500lb/in spring rate. SUPER stiff track springs are 16K which 896lb/in; so 3500 lb/in would be...62.5K kinda absurd ;p
When talking spring rates any "xx"K is kg/mm, not 1000's of lbs/in (we aren't compacting the car into a soda can, haha)
Aug 19, 2011, 09:45 PM
#36
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Now when you get these shocks developed, I won't have to buy another set of stock shocks/struts or KYB GR2s to get custom valved, thanks.
Aug 22, 2011, 04:59 PM
#41
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Not sure what you mean by "size". Do you mean diameter, or the whole ride-height/sprint-rate thing? In any case...
On my last car, I got the stock springs measured, both in and out of the car:
The spring supplier requested various ride and spring height measurements with stock springs still installed. I then sent all four springs off to the supplier. They tested them w.r.t. the measurements I'd taken, then recommended replacement springs based on the weight of the vehicle, what I said I wanted out of it, etc.
The new springs they shipped dropped ride height by the exact amount they indicated in advance. They weren't custom made jobs - the measurements I took, plus the testing they performed, showed which of their off-the-shelf springs would best suit me and the car.
But you probably don't want downtime, eh. I was lucky with the above - I found a spare set of springs to ride on while this was going on! They were softer, so it was ugly there for a bit, but it kept me mobile!
Rich
On my last car, I got the stock springs measured, both in and out of the car:
The spring supplier requested various ride and spring height measurements with stock springs still installed. I then sent all four springs off to the supplier. They tested them w.r.t. the measurements I'd taken, then recommended replacement springs based on the weight of the vehicle, what I said I wanted out of it, etc.
The new springs they shipped dropped ride height by the exact amount they indicated in advance. They weren't custom made jobs - the measurements I took, plus the testing they performed, showed which of their off-the-shelf springs would best suit me and the car.
But you probably don't want downtime, eh. I was lucky with the above - I found a spare set of springs to ride on while this was going on! They were softer, so it was ugly there for a bit, but it kept me mobile!
Rich
Aug 22, 2011, 07:10 PM
#42
I can measure the diameter of the spring. I will find my stockers. I then need to measure the free-standing length of the spring and the compressed length while on the car. I know more or less what I want for it to do.
So, they will tell you the drop, based on the weight of the vehicle, and the spring coefficient? Is that how it works, or is there something else that I am missing?
Also, I guess that I need to contact Swift and get this party started if it is really that easy.
Aug 22, 2011, 10:11 PM
#43
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At the time, I went through King Springs, eastern states Australia. That might not help you much!
But it's not rocket science. With a measured "compressed spring height" on the car, I guess it gets loaded into a squishing, compressing machine thingy (let me know if this is getting too technical!) and a force reading taken at the same height.
It undoubtedly gets more complicated if variable rate springs are involved.
If you have stock springs out of the car, you win. All you need then is in-car spring height measurements. Anyone on here with stock springs can get you that. Just make sure their car body matches yours (sedan vs. sportback) to avoid surprises.
Then you can give the springs and the installed-height measurements to a competent party, and they can do the math.
Rich
But it's not rocket science. With a measured "compressed spring height" on the car, I guess it gets loaded into a squishing, compressing machine thingy (let me know if this is getting too technical!) and a force reading taken at the same height.
It undoubtedly gets more complicated if variable rate springs are involved.
If you have stock springs out of the car, you win. All you need then is in-car spring height measurements. Anyone on here with stock springs can get you that. Just make sure their car body matches yours (sedan vs. sportback) to avoid surprises.
Then you can give the springs and the installed-height measurements to a competent party, and they can do the math.
Rich