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Old 01-08-2009, 09:46 PM   #1
SubyMass
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Default Suspension question for the NA experts

To start off, mods feel free to move to suspension, i just thought this pertains more to NA specific vehicles though not engine related.

The background: '05 RS 80k miles
ALK, 22mm Fr sway, 24mm adjustable rear, FR and Rr strut bars, all whiteline since about 40k miles.
GroupA TBS and lightweight crank since about50-60k. 17x7.5 SSR's with Eagle F1's.

So i've gotten it in head to upgrade my struts come spring time. I dont AutoX, i just enjoy spirited driving. Don't need/want any significant drop, i actually like a bit of clearance in the snow but if i did get a small drop out if it i would complain.

Here's what i'd like:
Tokico D-specs with something like JDM pinks.
So i'm not trying to cheap out but i dont need camber plates, I dont think i need GroupN's but i do think i need something stiffer than the stock RS strut mounts. Could i use a no name after market strut top from say NAPA or Autoparts intl? For comfort factor i would like new parts but i have been searching for "low mile" used WRX tops in the local and main for sale sections and it seems possible.
Here's the somewhat cheap part, i have $300 in suby bucks so some suby parts would help offset the cost (ie the GroupN tops or the SPT pinks). I would like JDM pinks but i think the SPT pinks would also fit my needs.

So recap on questions: Napa/Autopart intl strut tops ok?
SPT pinks a good pair with D-specs?
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Old 01-08-2009, 10:47 PM   #2
mslstixx
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If you are thinking about SPT pinks, then consider getting used 04 STi springs, the rates are nearly identical. Stock Sti is 224/195 pinks are 223/195.

Look for williaty's threads on his suspension setup, he has STi takeoffs (rates like the pinks) with D-specs, and he seems to really enjoy the setup. I'm sure there are others as well.

And yes, this should be moved to the suspension forum, you will definitely get more help there.
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Old 01-08-2009, 10:52 PM   #3
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Old 01-08-2009, 11:02 PM   #4
SubyMass
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i did see that spreadsheet.
Yeah i have followed a bit of williatys experiences with the tokico's in the "my tokico's are making a clunk" thread in suspension.
I thought about the whole used route and there is definitely money to be saved there, but what is the life expectancy of springs? Do they get fatigued over time?
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Old 01-09-2009, 12:24 AM   #5
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Stock-sized springs do not fatigue meaningfully. Coilover-sized springs do wear out however. Buying used stock-sized springs is safe so long as they're not rusty.

As far as the clunk, don't worry about it. It's only audible below 3-5mph and it's nothing to worry about unless you obsess over the details like I do.

The RS, WRX, and STi strut mounts all have the same hardness. The harder ones are the STi Group N ones. You WILL want something harder than stock. Group Ns at a minimum, camber plates are even better. You just wouldn't believe how big of a difference it makes in the front. In the rear, it's probably not worth the cost of the Group N tops if you're not tracking the car.

The SPT Pinks or the USDM STi take offs (04-07, not just 04) are going to be a much better fit for you than the JDM Pinks (who's rates are too high for you).
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Old 01-09-2009, 01:29 AM   #6
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IMO just get a set of STi struts and springs (at least that's what you sound like you'd want). Stiffer ride than stock, tiny bit lower, still cushiony. Good for the spirited driver, not the racer.

Kev
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Old 01-09-2009, 10:47 AM   #7
SubyMass
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Quote:
Originally Posted by williaty View Post
You WILL want something harder than stock. Group Ns at a minimum
Good to know, i did read inconclusive posts speculating about the RS tops not being the same, but i will trust your judgement for i'm sure you've tried them all.

It looks like i can get some STI take-offs for about $70 local but haven't seen pics, or for $75 plus shipping from AZ. and I'll prob stick to just front tops for now.

Thanks all for the input.
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Old 01-09-2009, 12:14 PM   #8
mslstixx
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Quote:
Originally Posted by williaty View Post
Stock-sized springs do not fatigue meaningfully. Coilover-sized springs do wear out however. Buying used stock-sized springs is safe so long as they're not rusty.
Are stock-sized springs more durable because of their much larger diameter (that would be the obvious difference between stock and coilover style springs)?


Quote:
Originally Posted by williaty View Post
The SPT Pinks or the USDM STi take offs (04-07, not just 04) are going to be a much better fit for you than the JDM Pinks (who's rates are too high for you).
Thank you for the correction, I was thinking about the struts, not the springs.

Alternatively, could the OP get a used 04 STi suspension (struts and springs)? No adjustability, but potentially much cheaper than D-Specs.

Also, can the STi struts be rebuilt (for a reasonable price)?
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Old 01-09-2009, 04:00 PM   #9
williaty
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The way it was explained to me, stock sized springs last longer because there is considerably more metal to them. The coil is longer, basically. That means each "chunk" of coil is asked to bend less to create whatever the total movement necessary is. It's like bending a paperclip back and forth to break it in half. The less distance you bend it, the higher the number of times you have to bend it before it snaps.

You could, in theory, get a complete 04 STi take off. However, by this point the struts are going to be near done (it's been a lot of miles since 04) and they weren't all that great to begin with. Sticktion/clunk problems. Not that great of a ride to begin with.

No data on rebuilding them.
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Old 01-09-2009, 04:12 PM   #10
mslstixx
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That's what I thought.

I didn't think 04 STi struts would be a good option, especially if they cannot be rebuilt.

Sounds like the OP should get the D-specs .
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