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Old 04-11-2003, 01:11 PM   #1
TriniTuner
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Question Spring rates of Prodrive WRX springs?

Anyone know the spring rates of the Prodrive WRX springs? Thanks.
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Old 04-11-2003, 06:11 PM   #2
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Old 04-12-2003, 01:10 AM   #3
sdecker
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Prodrive doesn't officially release the specs. :-(

However, the commonly accepted guess is 215F, 195R. This seems about right; roughly 10 percent higher than stock.

If you are on the fence about getting them, go for it. You won't be disappointed unless you are looking for a super-low drop.

Feel free to ask q's.

Scott
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Old 04-12-2003, 03:27 PM   #4
Rally Punx
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I agree with sdecker. They drop the car just right, and even the car out. Plus ride comfort is not that bad. I used to place 10th or 12th on autocrosses on the stock springs, when I installed the Prodrive springs I placed 2nd and was only 0.7 seconds behind the class winner (which had coilovers and slicks). BTW, I'm on Kumho 712s!!
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Old 04-12-2003, 03:34 PM   #5
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Oh, I agree wholeheartedly! I actually already have these springs and it improved my auto-x performance dramatically. I went from 2-3 secs down on the class leader to under 1 sec. Though.. I'm on Azenis...

I was just wondering what the spring rates were for comparison to others.
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Old 04-12-2003, 05:43 PM   #6
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I just installed the Prodrive springs and I love the look, it drops the car a perfect amount. I highly recommend them. However since I've put on Bigger 225/45 17'' tires I've noticed more body roll than stock. I think this is due to the better tires adhering to the road and transfering increased forces to the suspension. Any suggestions on how to reduce body roll with stock struts and prodrive springs? Does anyone have a setup that they love! Thanks
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Old 04-12-2003, 05:45 PM   #7
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Add a bigger rear and/or front sway bar to decrease the body roll.
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Old 04-12-2003, 06:31 PM   #8
sdecker
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Quote:
Originally posted by wrxstrs
I just installed the Prodrive springs and I love the look, it drops the car a perfect amount. I highly recommend them. However since I've put on Bigger 225/45 17'' tires I've noticed more body roll than stock. I think this is due to the better tires adhering to the road and transfering increased forces to the suspension. Any suggestions on how to reduce body roll with stock struts and prodrive springs? Does anyone have a setup that they love! Thanks
Not *exactly* on topic, but after a year of Prodrives on stock struts at Road Atlanta, I finally decided to bite the bullet and do the Koni inserts in conjunction with the Prodrives. If there is anyone else out there with combination, I haven't been able to find them...

I have some action shots somewhere...here you go:



This is a hard right hander (turn 1) at Road Atlanta, on stock struts, Prodrives, and Victoracer V700's. This is one of the faster turns on the track; I'm doing roughly 90-95 mph here and have just turned in hard. Look at the body lean -- not really all that much.

Here's another one at turn 3, a long sweeping left hander, again I'm doing about 80 here (and leading the pack of Bimmers I just passed, again ). This should give you a good idea of how little body roll you actually get with just the Prodrives.



I'm not installing the Konis to reduce body roll, although that is a convenient side effect. I'm putting them in because, well...because I can! No, just kidding; I feel that the stock struts are underdamped for the Prodrive springs. The back end of the car is a 'darty'...

Let me know if you have questions.

Scott
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Old 04-12-2003, 07:09 PM   #9
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Default Re: Spring rates of Prodrive WRX springs?

Quote:
Originally posted by TriniTuner
Anyone know the spring rates of the Prodrive WRX springs? Thanks.
215 front
195 rear

from Spring Rates

These are constant rate springs, which make street driving a little less comfortable and track driving more predictable. I hate variable rate springs.
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Old 04-12-2003, 11:24 PM   #10
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Wow, great Road ATL pics. I like closeups of WRXs in action on race tracks.

I feel there is another 50% of my car that has never been driven as my car just goes back and forth to work. Its like I have never explored the other half of my car on the track.

I plan to get Prodrives installed sometime this month.
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Old 04-13-2003, 12:11 AM   #11
Rally Punx
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sdecker, let me know the results after you install the Koni inserts. I've been contemplating this setup and like you, haven't seen anybody with it. I'm hoping it will make significant improvements on handling.
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Old 04-13-2003, 12:34 PM   #12
sdecker
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Quote:
Originally posted by Lightsped
Wow, great Road ATL pics. I like closeups of WRXs in action on race tracks.

I feel there is another 50% of my car that has never been driven as my car just goes back and forth to work. Its like I have never explored the other half of my car on the track.

I plan to get Prodrives installed sometime this month.
Thanks!

Get your car on a track, man! There's nothing like it. IMHO, not enough people know what the WRX can really do. Its only real issue is all the weight it carries around, but it still does pretty well out there for a street car. With just a few mods, I am able to lap BMW's like there's no tomorrow. Now THAT's my idea of fun.

Scott
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Old 04-13-2003, 12:36 PM   #13
sdecker
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Quote:
Originally posted by Rally Punx
sdecker, let me know the results after you install the Koni inserts. I've been contemplating this setup and like you, haven't seen anybody with it. I'm hoping it will make significant improvements on handling.
Will do...I will need to get it back out on the track to really see the differences, but I'm also hoping for a substantial improvement. I just didn't want the hassle of coilovers. Since I already had the Prodrives, it didn't really make sense to go to the STi or SPT setup.

I'll update the thread when I get them on.

Scott
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Old 04-13-2003, 08:37 PM   #14
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I just put Prodrive springs and Koni strut inserts on my sedan a week ago. So far I'm pretty happy. Less body roll and the car doesn't feel floaty thru a turn the way it did before. I'm going to a track (Gingerman) next weekend so soon I should know better what kind of performance improvement it gave me. Its not at all harsh for street driving but definately noticably stiffer.

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