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Old 03-24-2008, 02:47 PM   #1
RallySport Direct
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Default How To: 2008 WRX/STi Coilover Install

This is a how to install for 2008 Impreza Coilover install.

The factory suspension is very well designed, but as other previous models has room to improve on. And this is where the Cusco Zero2-E coilovers come in. They offer a great Daily Ride, and can be a powerfull tool at AutoX and Track Days.


Things needed:
Coilovers

Tools:
19MM Socket (6 point)
19MM Open end Wrench
12MM Open End Wrench
14MM Deep Socket
14Mm Open End Wrench
17MM 6 point Socket
17MM Open end wrench
Allen key to hold the sway bar end link from spinning.
Braker Bar
Torque Wrench.
And misc. extensions


1) Jack up the car, Put it on Jack Stands, and take off the tires.


2) Front Suspension is first. Take off the Brake line and the ABS wires off the Strut.



3) Take off the 2 lower bolts that hold the strut to the knuckle.


4)Take off the 3 top bolts that hold the top hats to the Chassis. Be careful, as the strut will be out after this. So make sure not to damage your outer axle boot.

New Vs Old
As you can tell the new coilovers are VERY low. We had to raise them about 1" to clear our race rims w/ tires. However with stock rims you might be able to get away with running the drop. But they are LOW!




5) Now go backwards. Put the top hat in so that the camber plate is sitting side to side. And tighten the top hat bolts.


6) Attach the Brake Line and the ABS wires to the strut.

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Last edited by RallySport Direct; 04-01-2009 at 05:47 PM.
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Old 03-24-2008, 02:48 PM   #2
RallySport Direct
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7) Now insert the 2 lower Bolts to attach the strut to the knuckle. And Place the Camber bolt so that your tires to not rub on the strut. (Be careful, as this can ruin a brand new set of tires and coilovers very fast if not set up properly)


Rear
8) Rear is straight forward. Make sure that the rear sway bar is not attached to the suspension, as it will not allow the arm to drop far enough to get the stock strut and spring out.

9) Take out the middle bolt thats in the picture as that holds the strut to the lower arm. This thing is TIGHT! So a breaker bar and a 6 point socket are a MUST to not strip the nut!


10) Take out the trunk mat and the 2 plastic side pieces to expose the top of the rear suspension. The 2 plastic covers on the inside have tabs on the back of them that will need to be slid up to allow the Covers to come out.



11) Take off the 2 top hat bolts and the rear suspension will be ready to come out. At this point you will need to press the lower suspension arm down to give you enough clearance for the strut to come out.

OLD VS NEW




12) Now work backwards. Put the Top hat in place and tighten the 2 nuts. Then jack up the lower arm so that the new strut will go into the lower arm and insert the bolt. TQ spec for the lower arm is 100ftlbs according to a local tech. And now tighten the end links as well that you removed.



You are almost Done!
After you do all 4 corners make sure all the spring purges are tight, and that all the hardware(bolts) are tight to factory spec.

Lower the car and tripple check everything. Then slowly start doing figure 8's and listen for rubbing or clunking. If everything is ok, go and get a alignment ASAP!

Last edited by RallySport Direct; 04-01-2009 at 05:48 PM.
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Old 03-24-2008, 02:48 PM   #3
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Enjoy!







Kirill
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Last edited by RallySport Direct; 04-01-2009 at 05:48 PM.
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Old 03-24-2008, 05:39 PM   #4
vision.dynamix
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Are these 08 STi specific or are they from another model?
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Old 03-24-2008, 05:42 PM   #5
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They are 2008 Sti Specific.

But this install should be the same for other 08 Impreza models.
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Old 03-24-2008, 06:05 PM   #6
MartinD
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Price?

Looks great BTW.
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Old 03-24-2008, 06:17 PM   #7
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Quote:
Originally Posted by MartinD View Post
Price?

Looks great BTW.
PM Sent
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Old 03-25-2008, 12:17 PM   #8
lateralus1082
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I love my Cuscos! Makes a big difference on the 08s!
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Old 04-11-2008, 06:23 PM   #9
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^^^^^
This man speaks the truth!
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Old 04-11-2008, 08:05 PM   #10
08blackpearl
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Cost shipped to 58501, and do you have the Power bracers, sways, and strut bars in stock. Going to be a Cusco whore!
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Old 04-14-2008, 11:45 AM   #11
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PM Sent
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Old 04-14-2008, 02:07 PM   #12
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Awesome write up guys!! Great!
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Old 09-27-2008, 06:33 PM   #13
mdeang
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thanks!
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Old 10-06-2008, 01:31 AM   #14
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sweet!
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Old 10-06-2008, 01:31 AM   #15
rice or die
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oh and thanks!
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Old 10-06-2008, 01:32 AM   #16
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awsome write up aswell
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Old 04-18-2009, 12:22 AM   #17
fragroute
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Default alignment numbers

what kind of alignment numbers have you used, especially camber? what was the net drop?
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Old 04-20-2009, 12:03 PM   #18
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It all depended on what the car was used for that weekend. We have ran the drop on average of 1.5" over stock.
On the street the camber was -2.5 Front, and -2.0 Rear
On the Track, front was -4.2, Rear was -2.0
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Old 04-22-2009, 12:33 PM   #19
@NT
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Thanks for the write up!

Do you have anything else done to the suspension? I dunno if the WRX is different, but there is a guy who has a 2008+ WRX with BC coilovers on his car and he can only get -1.5* of camber out of the front. How are you getting that much camber?
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Old 04-22-2009, 12:41 PM   #20
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The car has extensive suspension work, as its set up for road racing.

However for the front camber, that was with Maxing out the front camber plates along with maxing out the front lower Camber bolts.
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Old 04-23-2009, 02:14 AM   #21
@NT
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Any roll center adjusters? SCC is doing a tech article on a 2008+ WRX and they replaced the roll center adjusters to get more camber. Is that really necessary?
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Old 04-23-2009, 01:25 PM   #22
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The Roll Center kit allows you to bring the lower control arms and the outer tie rods to a proper angle. If the vehicle is lowered to much the arms get flipped, causing what is know 'bump steer', and a couple other issues. But it is not REQUIRED.
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Old 04-23-2009, 09:53 PM   #23
@NT
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To my understanding, because of the strut design, the lower the car is, less negative is achievable.

ENTER Roll Centers.

Thanks for your help, I'm only concerned because I want to run an aggressive setup and I need camber. 1.5* won't cut it.
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Old 04-24-2009, 06:44 AM   #24
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With regard to alignment: do you give it extra caster (not camber) since you dropped the nose a bit more than the back (or so it seems)?

IIRC, more caster gives better straight line stability vice versa?

Thanks,
Walter
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Old 04-24-2009, 01:21 PM   #25
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Quote:
Originally Posted by @NT View Post
To my understanding, because of the strut design, the lower the car is, less negative is achievable.

ENTER Roll Centers.

Thanks for your help, I'm only concerned because I want to run an aggressive setup and I need camber. 1.5* won't cut it.
Roll center kits will bring down the outer tie rods and front lower ball joint. So if you go so low that your arms are not facing up, they will help to bring them down to a more reasonable angle.
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