To beat a dead horse ( lowering springs, struts, coil-overs, tower braces, sway bars, - Kia Forum

 
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post #1 of 7 (permalink) Old 06-14-2007, 03:20 PM Thread Starter
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To beat a dead horse ( lowering springs, struts, coil-overs, tower braces, sway bars,

To beat a dead horse!


Ok people I’m going to start these threads with common questions about simple over the counter parts you can buy and DIY stuff you can do to mod your spectra.



To beat a dead horse ( lowering springs, struts, coil-overs, tower braces, sway bars)


Ok people I know I’m missing a few things here like “Rims: being a good one but I just want to focus on the hard parts.

Sway bars. There has been a lot of talk about upgrading this one part to increase roll stiffness. So how may of you have done this mod and what parts did you get and how thick of a sway bar did you install and how did it work out?


Lowing springs, what brand did you by and how low or high did you go. If you did more than one set up tell us witch set up you liked the most.

do you know any one thats actually bought a set of coile overs for our car and installed them?
how did thay ride what was the fit and qualty?
where did you get them and how long did it take to get them?

Ok ok I know struts should be part of the lowering spring question so is there a stiffer aftermarket strut out there? If you lowered you car did you keep factory struts and hhow have they lasted? And have any of you spectra Ex, Lx owners upgraded to the stiffer spring and shocks on the SX and Spectra5?

And finally I have a bone to pick with people about the tower braces. Fist of all no matter how thick you tower brace is un less its triangulated ( attached at three points) they hardly do anything.
Now there is a few exceptions to this rule the Honda Civic/CRX all up till the 2001 and the third gen Integra. Those cars respond so well to tower braces because of the flex built in to those cars. They were built this was to accommodate the double wish bone suspension that requires a lot of flex in the chasse to work correctly. And stiffing the shock towers on those cars with a ( tower brace) effectually stiffened the roll rates of those cars like putting stiffer sway bars on the car.
(McPherson strut cars) like ours and most every outer car use tower braces to simply as a means of boxing the frame and as a marking gimmick to infer a stiffer suspension.
now i know Evos and Sti have a tower brace but if you took it off as most sti guys do for bigger under hood intercoolers it there is no change in handling. The Evo actually has a hard point on the fire wall for the better tower brace the one that came wiht the car is just for show, you can actually bend it with your hand.
So long story short un less your racing your car on 40degree incline track or regularly jumping 10ft breams on off road, the kia factory tower brace is plenty stiff for your needs if you go after market make sure you get one that attaches to both shock towers and a stiff part or the firewall.


Last edited by tiburon1; 06-14-2007 at 03:25 PM.
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post #2 of 7 (permalink) Old 06-14-2007, 08:00 PM
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In reference to your question about lowering springs. I have the Eibach Pro Kit springs on my Spec5. I paid around 200 dollars from TireRack and it was relatively simple to install them. You have to have the spring compressors or you will never get them back together. It's also safer to have them on when you are dissasembling your suspension to get the stockers off. After I installed them I did experience a noticable difference in the way my car handled. There was less sink when I was accellerating hard from a take-off. The are advertised at 1.2 for the front and 1.4 for tha back in inches lowered. I am sure I got more like 2 in the front and almost that in the back. I didn't get my car aligned after installing them and haven't had many problems with having the little bit of negative camber that come with lowering your car. I drive my car pretty hard and hit up the occational AutoX so the camber helps but tire wear in the rear is noticably slanted. I will be installing coilovers someday so I have more options for height and dampening. I am still using the stock struts and so far they have held up just fine with 15000+ miles on the OD.

As far as the stock Spec5 front tower bar is concerned, I was planning on modifying mine to attach at the firewall via two more arms and an attachment bracket. You are very right about most of the bars that are out there. The 3 point bar is the most effective. Once I get to that I will let everyone know. The stock bar isn't a solid piece, it's hollow so of course it's going to flex more than a solid one would. It came with the car so I'm not complaining.


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post #3 of 7 (permalink) Old 06-14-2007, 09:52 PM
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Quote:
Originally Posted by tiburon1
Sway bars. There has been a lot of talk about upgrading this one part to increase roll stiffness. So how may of you have done this mod and what parts did you get and how thick of a sway bar did you install and how did it work out?
First of all, a lot of parts made for the Hyundai Elantra and Tiburon fit the Kia Spectra and Spectra5 straight up. All three cars were developed by Hyundai (with Kia being a division of Hyundai), and all were built on the same basic platform and share a lot of (but not all) suspension parts. The biggest difference I know is that the front sway bar of the Tib does not fit the Elantra or Spectra, and the Tib has 5-lug wheels while the other two have 4-lug wheels. So if you want to upgrade to Tib brakes, either the rotors need to be drilled to a 4-bolt pattern or the hubs need to be upgraded to the 5-lug Tib lugs. I know both of these have been done on Elantras and I'm pretty sure they could be done to the Spectra.

With regard to rear sway bars, the bar of choice in my opinion is the 03 Tiburon GT bar. It's 19 mm, MUCH stiffer than the 13 on the Spectra. And its geometry is identical making it an easy change out. Here is a guide to the sway bar that I wrote.

Quote:
Lowing springs, what brand did you by and how low or high did you go. If you did more than one set up tell us witch set up you liked the most.

do you know any one thats actually bought a set of coile overs for our car and installed them?
how did thay ride what was the fit and qualty?
where did you get them and how long did it take to get them?

Ok ok I know struts should be part of the lowering spring question so is there a stiffer aftermarket strut out there? If you lowered you car did you keep factory struts and hhow have they lasted? And have any of you spectra Ex, Lx owners upgraded to the stiffer spring and shocks on the SX and Spectra5?
I haven't messed with those... at least not yet. But as I said earlier, a lot of products made for Elantra and Tiburon will work with the Spectra.

Quote:
And finally I have a bone to pick with people about the tower braces. Fist of all no matter how thick you tower brace is un less its triangulated ( attached at three points) they hardly do anything.
I test drove both the Spectra5 and the Elantra and both seemed to have an issue with "steering wander". On the highway, it seems like the car just wants to slide off to one direction or the other, requiring constant, although small, corrections. I bought my Elantra and just figured it was something I had to get used to... and I did. I also noticed that cornering was pretty imprecise, especially if the road surface was not smooth and consistent. Then someone recommended I get a front strut bar. I did, and although you're right in saying "they hardly do anything", they do, in fact, go a long way toward correcting these issues (which were subtle to begin with).

I'm considering getting a rear strut bar as well. I think for sedans, structure is adequate and a strut bar isn't really needed. But on hatchbacks like my Elantra 5-door and the Spectra5, there is noticeable body flex and you can hear the body creak when turning into a driveway, for instance. Someone I know from an Elantra forum is just about ready to bring a removeable strut bar to market (in July), and I'm helping him finalize the design. I have a hatch because I like to haul stuff in it, so a fixed rear strut bar is out of the question. But a removeable one might be just the ticket. We'll see.


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post #4 of 7 (permalink) Old 06-14-2007, 10:27 PM
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Quote:
Originally Posted by Flipipino
The stock bar isn't a solid piece, it's hollow so of course it's going to flex more than a solid one would.
Trust me, as an engineer I can assure you the bar would not be noticeably stiffer if it were solid. Most of the stiffness comes from the outer layers; the contribution of any portion of the section to bending stiffness is a function of the square of that portion's distance from the neutral axis. So the part in the middle contributes very little which is why they made the bar hollow.


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post #5 of 7 (permalink) Old 06-15-2007, 08:35 AM
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Quote:
Originally Posted by Doohickie
Trust me, as an engineer I can assure you the bar would not be noticeably stiffer if it were solid. Most of the stiffness comes from the outer layers; the contribution of any portion of the section to bending stiffness is a function of the square of that portion's distance from the neutral axis. So the part in the middle contributes very little which is why they made the bar hollow.
Dude..... I get it. You are killing me with all the BIG words. LOL. You could've just answered with a "not really" and I would've been good with that but thank you for the explanation. I'm glad there are some people on this forum who know a little something.


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post #6 of 7 (permalink) Old 06-20-2007, 08:50 AM Thread Starter
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its always good to hear peoples results wiht upgrades to there rides. here is the deal a hollow sway bar is stiffer bucas it has more surface area both the out side and the hollw inside part ( shor answer i know.) so has any one installed Tiburon 5 lug hubs on there elantra or spectra.love to know if how it went.
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Looking to stiffen my ride 2001kia sephia just like a spectra so will tib coilovers work on it?
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