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Old 10-25-2002, 10:35 PM   #1
alfriedesq
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Member#: 6788
Join Date: May 2001
Location: Stamford, CT 06902
Vehicle:
2005 STI
10.9 @ 130

Default Review - STI/SPT struts & springs VS. Cusco coil overs VS. Stock

Been looking for a softer riding winter set up - 1st went back to stock then just put on the STI/SPT set up - I have the following observations:

Stock - ride - very soft - but not cushy
Handling - OK if not pushed too hard - dives down when hard breaking - lots of mushyness - very vauge when making transitions - - BUT very good on broken pavement or speed bumps

STI/SPT - fits 100% - easy install - - firmer but not harsh ride very liveable as a daily driver
Handling - better on dive when breakling - BUT still rises up in the air and causes the front end to loose traction on very hard acceleration - - much more precise in transitions BUT still some vaugness - - much better roll resistance than stock
Just feels right - - very enjoyable as a daily driver set up - very confortable - feels like about the same level as an "M" series stock BMW

Cusco - fits 100% - just bolt in - - harsh firm as can be ride on any surface other than a smooth highway - - fairly uncomforatable on long trips
Handling - IDEAL - no break dives - no significant lifting of font end under acceleration - - very good roll control - excelent turn in - extreme precise in transitions
Disatvantage - LIMITED wheel travel - - can result in car leaving the ground on very bumpy roads - - it seems that it requires fairly stiff springs to prevent the car from hitting the limits of the limited wheel travel range - - with these units you gain smooth road handling - BUT you sacrifice the rough road capability of the WRX with its stock extreme wheel travel range that just soaks up the bumpy stuff

Conclusion - - I'm enjoying being back to the rally car feel of the stio set up - but realize that the comfort and rough road capacity comes at a sacrifice of ultimate smooth road performance

Final thought - I put about 7 K problem free miles on thge cusco units - there were not rattles - no banging or any problems - they are very high quality units
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Old 10-26-2002, 09:04 AM   #2
gtguy
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Member#: 2184
Join Date: Aug 2000
Location: Highland Park, Ill., USA
Vehicle:
2005 Legacy GT wagon
Platinum Silver Metallic

Default

Thanks Al, that's good information. Know that some of the difficulties that you're having with the SPT stuff can be fixed with the addition of other STi goodies, like the front control arm bushings, and the complete link setup (lateral/trailing/swaybar) at the rear.

Kevin
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Old 10-26-2002, 11:58 AM   #3
boxerT
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Member#: 16311
Join Date: Mar 2002
Chapter/Region: TXIC
Location: Austin TX
Vehicle:
2004 STi
WR Blue

Default

That is good information Al.

However, as an obviously proud quarter mile racer I would worry that you may not know too much about turning right/left. Perhaps you could brag a little about your road racing/auto-x success more related to your handling information.
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Old 10-26-2002, 05:56 PM   #4
Red Rocket
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Member#: 10507
Join Date: Sep 2001
Vehicle:
'04 Ex STi Owner
'97 4Runner

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I'm running agx's with ver. 5/6 springs - basicly the same thing but slightly stiffer, slightly lower, and adjustable, non-inverted struts. Ride and handling is much better than stock. AGX's are definitely better than stock struts. I have plenty of travel and just the right spring rate for speed on rough roads.

I may pickup some coilovers next year for summer use, but I will retain my current setup for the winter.

Kevin
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Old 10-26-2002, 08:50 PM   #5
alfriedesq
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Join Date: May 2001
Location: Stamford, CT 06902
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2005 STI
10.9 @ 130

Default

Quote:
Originally posted by boxerT
That is good information Al.

However, as an obviously proud quarter mile racer I would worry that you may not know too much about turning right/left. Perhaps you could brag a little about your road racing/auto-x success more related to your handling information.
Last summer - before my daughter was born - I used to do many auto x's - - in fact I did a few auto x's at the drag strip and then went to the strip afterwards - I did pretty good - I even got a 2nd place SM finish once - but just dont have the time to dedicate anymore and I found it was very very hard on my tires and transmission

Now that the drag season is over I am trying to make it a better running all around car again

BTW - I;d sayt the coil overs would be the best auto cross set up by far - - - The SPT set up would noit be that good for auto X becuase the front end sits so high
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Old 10-26-2002, 08:52 PM   #6
alfriedesq
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Member#: 6788
Join Date: May 2001
Location: Stamford, CT 06902
Vehicle:
2005 STI
10.9 @ 130

Default

Quote:
Originally posted by gtguy
Thanks Al, that's good information. Know that some of the difficulties that you're having with the SPT stuff can be fixed with the addition of other STi goodies, like the front control arm bushings, and the complete link setup (lateral/trailing/swaybar) at the rear.

Kevin
I have the complete Group N STI bushing set - sti sway bars and 225 45 17 tires - - - it still is on the soft side for all out performance driving - although its perfect for the commute to work
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Old 10-27-2002, 10:13 AM   #7
gtguy
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Location: Highland Park, Ill., USA
Vehicle:
2005 Legacy GT wagon
Platinum Silver Metallic

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The difference between the two, is that the pink STi bits have spherical metal bushings in the lateral and trailing links. That little bit of extra mojo might work for you...it sure did for me.

Kevin
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Old 10-27-2002, 12:13 PM   #8
akoshy
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Member#: 20931
Join Date: Jul 2002
Chapter/Region: MWSOC
Location: MN
Vehicle:
09 Subaru

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Quote:
Originally posted by gtguy
The difference between the two, is that the pink STi bits have spherical metal bushings in the lateral and trailing links. That little bit of extra mojo might work for you...it sure did for me.

Kevin
Yup ! Spherical pivoting metal bushings unlike the fixed bushings of the others.
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Old 10-27-2002, 08:18 PM   #9
02 T-WREX
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Member#: 11449
Join Date: Oct 2001
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2006 STi
SGM

Default

Hey Kevin,

How much NVH increase was there with the pink bits? I've replaced bushings with spherical metal bushings in my race car, and the resulting NVH would be REALLY annoying in a street car.

Thanks,
Chip
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