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Old 09-02-2002, 02:40 PM   #1
HamFist
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Default Every suspension piece known to man...

heheh....well, looks like my next round of upgrades is coming soon. I'm looking for those of you who might have a list similar to this, all on one car. Doubt this would be a disappointing list

Swaybar links F/R
Engine mounts
Cusco undercarraige braces F/R
Rear diff mount
Cusco Rear diff brace
STi RA springs (german auto)/+struts (?)
rear strut bar
susp bushing
sti rear link kit
rear sway bar mount kit (?)

I already have a front strut brace, rear 20mm bar, and stainless lines. The brakes are good, and so are the kumho 712s. A flywheel is coming soon, too. I'm more or less curious how well these parts improve times at the autoX and launch for the drags. How's NVH with this stuff? What might break under new stress loads? Any and all input is appreciated. Cheers! Mel
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Old 09-03-2002, 09:29 AM   #2
jimb
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All that and still running the stock struts? That really seems to be a waste of money to me. For the cost of all those bolt on braces and bushings you can have a really nice set of coilovers that might actually make a positive difference.

jb
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Old 09-03-2002, 01:06 PM   #3
peepshow
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jb, the listed parts are his PLANNED upgrades. And, the list includes struts "STi RA springs (german auto)/+struts (?)". He currently only has a front STB and a rear 20mm sway bar, "I already have a front strut brace, rear 20mm bar, and stainless lines".

HamFist, it sounds like a good list to me. Have fun with all those rear bushings, though. The bushing install sounds like a PITA to me, but I'm sure it will feel nice afterwards!

- Trent
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Old 09-03-2002, 03:06 PM   #4
HamFist
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oh yes, the struts will be replaced, but upgraded is a loose word for them. I chose the sti RA springs because IIRC, they work on stock-like RS struts. GR2's are on my list, as are Monroes, and possibly kybs. I'm praying tokico finishes theirs soon and the prices are decent. I'm not too keen on bilstein, and konis seem pretty good but not much better than stock RS struts. There's plenty of quality suspension pieces that can make a bad driver on coilovers look exactly that. Coilovers don't make you god...but it's one step cloer to heaven. The bracing, mounts and such are just that extra edge . What I've been concerned with is what else might break or recieve and extra stress load. Like the rear swaybar mounts breaking. (heard of it, never seen it.) Could they literally be torn out of the chassis? Or the broken kartboy (?) links thread. The car will be raced when it's not parked quietly in the garage. Maybe the suspension will be good enough for it on long trips, too...I dunno!!! The new springs are only 20% stiffer than RS springs, and they don't lower it more than an inch.
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Old 09-03-2002, 03:43 PM   #5
peepshow
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HamFist, if you are going with Type RA springs, I would suggest contacting Wayne at AV Sports and try to get a set of springs/struts as take-offs from an RA. He should be able to source some for you and at a good price, to boot.

- Trent
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Old 09-03-2002, 05:31 PM   #6
CTKAG
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The STi RA springs are the same black springs as found in the SPT kit. Most of the STi takeoffs have the pink (slightly softer, slightly lower) spring.
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Old 09-03-2002, 07:53 PM   #7
jmott
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Default Re: Every suspension piece known to man...

your dragstrip launches wont change at all.
your autocross times could get worse or better.
who knows!
you are throwing on a lot of parts at once there!

if you want a good autocross suspension setup, the koni inserts matched with MRT springs, and a whiteline rear swaybar, and front cusco camber plates has proven very effective on an STX car here in houston.

the BEST thing you can do to improve handling is lower the car.
this does far more to reduce weight transfer than STIFFENING it.
in fact, stiffening it does very little to reduce weight transfer, even if you get less body roll.

adjusting the roll stiffeness ratio front/rear can help get rid of the nasty understeer. So a stiffer rear swaybar, and adjusting the struts stiffer in the rear than the front is a good idea.

for this purpose, ground control springs might be a good option, since you can lower the car way down at the track, and keep it up at a reasonable height on the street.

camber plates are also a big help, as you can dial in 2.0 or more degrees negative camber at the track, and put it back to normal later. Use a pryometer to help determine optimal camber.

and of course, tires are the most important thing of all.

I dont personally think there is much point in stiffening the chassis with all that stuff. Especially if you don't plan on running race rubber.


Quote:
Originally posted by HamFist
heheh....well, looks like my next round of upgrades is coming soon. I'm looking for those of you who might have a list similar to this, all on one car. Doubt this would be a disappointing list

Swaybar links F/R
Engine mounts
Cusco undercarraige braces F/R
Rear diff mount
Cusco Rear diff brace
STi RA springs (german auto)/+struts (?)
rear strut bar
susp bushing
sti rear link kit
rear sway bar mount kit (?)

I already have a front strut brace, rear 20mm bar, and stainless lines. The brakes are good, and so are the kumho 712s. A flywheel is coming soon, too. I'm more or less curious how well these parts improve times at the autoX and launch for the drags. How's NVH with this stuff? What might break under new stress loads? Any and all input is appreciated. Cheers! Mel
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Old 09-03-2002, 08:28 PM   #8
TheWRX
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Default Re: Every suspension piece known to man...

Quote:
Originally posted by HamFist
I'm more or less curious how well these parts improve times at the autoX
What class do you plan to run? I think some of the items on your list would put you into SM.
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Old 09-03-2002, 08:51 PM   #9
Avedis
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I've heard several times that you'll want to replace the engine and tranny mounts at the same time... something you might want to think about since I only saw one of 'em on your list of "I have" or "I want".

--jeff
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Old 09-03-2002, 10:20 PM   #10
HamFist
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hmm...interesting input fellas. I forgot to mention I was going to sink b/n 5-800 dollars into the suspension. That pretty much rules out coilovers of any sort. I found all this other stuff and couldn't wait to try it. Personally, I don't worship coilovers and camber plates, but I agree they do kick some major azz...1800 dollars later. I just haven't had much track time with the stuff on my own car to find out what they do. I've whipped coilovered bmws on hte track with a stock suspension and a rear swaybar. BTW, I have a tranny mount but no engine mts yet. They're on the list. Jmott, what can you tell me about the "koni inserts?" They don't sound familiar. Always thought it was "stock replacement strut," "ricer coil spring insert," or "full race coilovers" as options. . Forgot to add front camber plates to the list. I have a friend in town on whiteline spgs/sti struts w/ front/rear strut bars. It handles (hillbilly rated) about 8/10's as well as a coilover can...for 1/2 the price! IMHO, there's virtue in stiffening the chassis, too . A unibody car is like a "honeycomb". Bracing is analagous to increasing the surface tension of the honeycomb. It makes the suspension do more work. More shock goes into the suspension instead of distributing the energy to the chassis.

Here's some food for thought...it's a trade off I'm not too sure about. The undercarraige bracing is going to add weight to the car. (15-20lbs) But, it's at or below the axis of the wheels. Will that reduce body roll as well? Is there also more unsprung weight with it? There's trade offs, but i'm confident it'll do something otherwise they wouldn't make it.
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Old 09-04-2002, 10:58 PM   #11
HamFist
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bump...


any more input?
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Old 09-05-2002, 02:05 AM   #12
Uncle Scotty
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....OverKill...
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Old 09-05-2002, 09:09 PM   #13
HamFist
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of course...anything less just won't do...
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