UMI Releases New Product: 3rd Gen Lowering Springs
#1
UMI Releases New Product: 3rd Gen Lowering Springs
1982-1992 GM F-Body Lowering Spring Kit, 1"-1.5" lowering
Great for corner carving, daily performance driving, auto-x and stance improvement
UMI P/N 2461
WEBSITE LINK HERE
$259.99/SET OF FOUR
UMI’s performance lowering springs are built to lower the 3rd Gen approx. 1” - 1.5” and increase the spring rates for a crisp handling experience and better stance. UMI springs are Made in USA of 5160 CrSi wire up front and 9254 CrSi wire in the rear. The 600 lb/in front rate and 200 lb/in linear rear rate reduces floating and body roll while still allowing for comfortable cruising and performance handling. Think of it as permanent sport mode! These springs work with the popular Koni and KYB shocks and struts as well as with other factory style dampers. As an industry leader in the muscle car suspension industry, UMI is proud to bring you the best spring in the business. Designed in conjunction with a leading NASCAR engineer, we are proud to offer the highest quality spring choice available.100% designed and manufactured with pride in the USA.
Features: Consistent rates and only the best materials (premium Chrome Silicon wire) ensure your cars sits properly for years to come.Linear spring rates (600 lb/in front, 200 lb/in rear) provides a firm yet comfortable ride and incredible handling.No more floating feeling.Suitable for Pro-Tour, Auto-x and general cruising.Works best with Koni, KYB or other equivalent standard mount strut and shock. 100% Made In USA
Great for corner carving, daily performance driving, auto-x and stance improvement
UMI P/N 2461
WEBSITE LINK HERE
$259.99/SET OF FOUR
UMI’s performance lowering springs are built to lower the 3rd Gen approx. 1” - 1.5” and increase the spring rates for a crisp handling experience and better stance. UMI springs are Made in USA of 5160 CrSi wire up front and 9254 CrSi wire in the rear. The 600 lb/in front rate and 200 lb/in linear rear rate reduces floating and body roll while still allowing for comfortable cruising and performance handling. Think of it as permanent sport mode! These springs work with the popular Koni and KYB shocks and struts as well as with other factory style dampers. As an industry leader in the muscle car suspension industry, UMI is proud to bring you the best spring in the business. Designed in conjunction with a leading NASCAR engineer, we are proud to offer the highest quality spring choice available.100% designed and manufactured with pride in the USA.
Features: Consistent rates and only the best materials (premium Chrome Silicon wire) ensure your cars sits properly for years to come.Linear spring rates (600 lb/in front, 200 lb/in rear) provides a firm yet comfortable ride and incredible handling.No more floating feeling.Suitable for Pro-Tour, Auto-x and general cruising.Works best with Koni, KYB or other equivalent standard mount strut and shock. 100% Made In USA
Last edited by UMI Sales; 10-25-2018 at 10:18 AM.
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Tidan (02-13-2020)
#3
Re: UMI Releases New Product: 3rd Gen Lowering Springs
Thanks for the inquiry.
We can indeed sell the springs independently.
Our goal is to have the rear weight jacks ready for Black Friday but that's an internal goal (external now that I posted it on the interweb I guess). As with any goal it depends on variables like spring supplier, weld shop busy-ness, etc.
If you're not subscribed to our newsletter where we make the announcements you can do so here.
thx
ramey
We can indeed sell the springs independently.
Our goal is to have the rear weight jacks ready for Black Friday but that's an internal goal (external now that I posted it on the interweb I guess). As with any goal it depends on variables like spring supplier, weld shop busy-ness, etc.
If you're not subscribed to our newsletter where we make the announcements you can do so here.
thx
ramey
#6
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Re: UMI Releases New Product: 3rd Gen Lowering Springs
While I am no expert the rear rate seems overly stiff for the soft front rate. I don’t remember exactly who, maybe slicktrack, but someone here suggested 4:1/front:rear was a good starting point to get these machines to handle well. May seem like a strange question but what’s the free height on these?
#7
Re: UMI Releases New Product: 3rd Gen Lowering Springs
Send me a message to ramey@umiperformance.com to remind me to measure the free height.
In general a passenger car tends to push (understeer) so we have the rear rate raised a little bit to compensate and get the car to rotate.
As we develop the chassis on these, we'll fine tune the rates.
For the intended use on this set, the cars work great. Also there are many different sway bars out there as well as other tuning aids.
ramey
In general a passenger car tends to push (understeer) so we have the rear rate raised a little bit to compensate and get the car to rotate.
As we develop the chassis on these, we'll fine tune the rates.
For the intended use on this set, the cars work great. Also there are many different sway bars out there as well as other tuning aids.
ramey
The following users liked this post:
Tidan (02-10-2020)
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#9
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Re: UMI Releases New Product: 3rd Gen Lowering Springs
Keep in mind guys while these springs will and do work well on a handling car this are a great street friendly comfort spring. We have been very happy with the overall driveability of these rates, especially when combined with a set of quality shocks. For more handling based cars our weight jacks offer more rate options and ability to adjust/tune.
#10
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Car: 89 IROC
Engine: 5.7 TPI
Transmission: 700R4
Re: UMI Releases New Product: 3rd Gen Lowering Springs
UMI - how would these compare to Eibach Sportlines?
I have a set of uninstalled new sportlines, but I also have several UMI products on my 89 Iroc that I am very happy with. Just curious what the comparison would be if you know? Only reason I ask is that I have had 2 prior and 1 current other vehicles with Eibach products that I have been happy with as well.
Thanks
I have a set of uninstalled new sportlines, but I also have several UMI products on my 89 Iroc that I am very happy with. Just curious what the comparison would be if you know? Only reason I ask is that I have had 2 prior and 1 current other vehicles with Eibach products that I have been happy with as well.
Thanks
#11
Re: UMI Releases New Product: 3rd Gen Lowering Springs
Might be a stupid question but do these work well on verts as well. I was told once by a mechanic that vert springs are different and tough to find. He may have just been talking about stock replacements but I cant imagine how there would be any difference. Mine is an 89 iroc vert
#13
Re: UMI Releases New Product: 3rd Gen Lowering Springs
Might be a stupid question but do these work well on verts as well. I was told once by a mechanic that vert springs are different and tough to find. He may have just been talking about stock replacements but I cant imagine how there would be any difference. Mine is an 89 iroc vert
#14
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Re: UMI Releases New Product: 3rd Gen Lowering Springs
700lbs/in front and 80-137lbs/in rear. Prokit is a little stiffer at 714lbs/in front 109-177lbs/in rear.
To pointwerp, I wouldn’t use the sport line springs. They’re more about looks than performance. If I were to use an Eibach product it would be the prokit, backwards from most of their other offerings on other chassis but that’s the way it is with ours
To pointwerp, I wouldn’t use the sport line springs. They’re more about looks than performance. If I were to use an Eibach product it would be the prokit, backwards from most of their other offerings on other chassis but that’s the way it is with ours
Last edited by SilverChicken; 11-23-2018 at 10:34 AM.
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Car: 89 IROC
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Re: UMI Releases New Product: 3rd Gen Lowering Springs
Thank you for your info/advice SilverChicken, I'll do more research, I may use the sportline and if I am not happy will swap over to something else, likely these. I have not had a sportline kit only prokits on my other vehicles in the past.
#17
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Car: 1989 Firebird
Engine: 5.7 LS1
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Re: UMI Releases New Product: 3rd Gen Lowering Springs
I have a BMR K-member and A-arms has anyone tried the weight jacks from UMI with this combination (I'm not opposed to grinding etc) -- @UMI Sales do you have the specs on the mating surface so I could measure before ordering... I had it in my shopping cart as well as a pan hard bar but... thought I should make sure first.
#18
Re: UMI Releases New Product: 3rd Gen Lowering Springs
Hey, good evening.
Shoot me a message to ramey@uimperformance.com and I can reply with the measurements. Happy to get them for you.
rw
Shoot me a message to ramey@uimperformance.com and I can reply with the measurements. Happy to get them for you.
rw
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Car: 1989 Firebird
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Re: UMI Releases New Product: 3rd Gen Lowering Springs
I will measure this weekend, I'll email you pics and measurements also.
With the ls1 up front my WS6 springs sit way to high. But since it's mostly street driven I don't want to make it too low so the weight jacks seem the best option.
Do you use the rubber isolator?
With the ls1 up front my WS6 springs sit way to high. But since it's mostly street driven I don't want to make it too low so the weight jacks seem the best option.
Do you use the rubber isolator?
#24
Re: UMI Releases New Product: 3rd Gen Lowering Springs
#27
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Re: UMI Releases New Product: 3rd Gen Lowering Springs
I ended up going with 5.5x12” circle track springs up front so I could pick my own spring rates. Doesn’t sit quite as low as their car so not as cool looking for most of you guys but I was most concerned with rate, geometry, and clearance than looks. Out back I went with an adjustable spring spacer and 5x10.5” rear springs. Again, pick your own spring rate. I’m not knocking UMI’s product here by any means but if you’ve moved and removed a lot of weight in your car this may be more what you want to do.
#28
Re: UMI Releases New Product: 3rd Gen Lowering Springs
I ended up going with 5.5x12” circle track springs up front so I could pick my own spring rates. Doesn’t sit quite as low as their car so not as cool looking for most of you guys but I was most concerned with rate, geometry, and clearance than looks. Out back I went with an adjustable spring spacer and 5x10.5” rear springs. Again, pick your own spring rate. I’m not knocking UMI’s product here by any means but if you’ve moved and removed a lot of weight in your car this may be more what you want to do.
#30
Re: UMI Releases New Product: 3rd Gen Lowering Springs
Thinking about getting these as well. My car is a cruiser that may see a couple of autocross events this season. I am coming from a caged, full suspension, drag oriented 4th gen and I like my cars to ride a little stiffer anyway. These springs sound like they may be what I am looking for.
#31
Re: UMI Releases New Product: 3rd Gen Lowering Springs
Thinking about getting these as well. My car is a cruiser that may see a couple of autocross events this season. I am coming from a caged, full suspension, drag oriented 4th gen and I like my cars to ride a little stiffer anyway. These springs sound like they may be what I am looking for.
im trying to confirm my factory spring rates and so far all my searches here haven’t been definitive. I hear 550 to 700lbs front and 107
to 200 out back. They are BZX and NNL.
I’d like to believe the aftermarket springs are more stiff than oem hence why they would enhance performance. If that’s true then I’ll opt for the hotchkis since I’m more interested in smoothness than pulling g’s.
#33
Re: UMI Releases New Product: 3rd Gen Lowering Springs
these or the pro kit might be for you. I’m on stock shocks I’m not sure they’ll have the valving to carry a 200 weight spring out back and pro kit is 714/177.
im trying to confirm my factory spring rates and so far all my searches here haven’t been definitive. I hear 550 to 700lbs front and 107
to 200 out back. They are BZX and NNL.
I’d like to believe the aftermarket springs are more stiff than oem hence why they would enhance performance. If that’s true then I’ll opt for the hotchkis since I’m more interested in smoothness than pulling g’s.
im trying to confirm my factory spring rates and so far all my searches here haven’t been definitive. I hear 550 to 700lbs front and 107
to 200 out back. They are BZX and NNL.
I’d like to believe the aftermarket springs are more stiff than oem hence why they would enhance performance. If that’s true then I’ll opt for the hotchkis since I’m more interested in smoothness than pulling g’s.
#34
Re: UMI Releases New Product: 3rd Gen Lowering Springs
I just put on the KYB Excel-G shocks so maybe that will play a part in which springs to run as well. I needed something to replace the worn out stock shocks so I opted for these since they were cheap and seem to get decent reviews. My car still is a little floaty and bouncy so I wanted to replace the springs to stiffen it up a bit.
#35
Re: UMI Releases New Product: 3rd Gen Lowering Springs
im not an expert but you might have been better off getting adjustable Koni yellows. They ride firm and might have paired better with your springs than the kyb which certainly can’t hold a candle to the Konis. If you were happy with the ride height anyways, that may have been the better approach since kyb and springs would cost about the same as a set of Konis.
Going in, I didn't plan to modify this car much at all. I just want it to ride and handle a little better than stock.
#36
Re: UMI Releases New Product: 3rd Gen Lowering Springs
ah I forgot you didn’t get the adjustable kyb shocks and struts. That’s all the difference. Anyway I think UMI should just donate a set of springs to each of us for making this thread popular again lol
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