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Old 10-21-2007, 08:56 PM   #1
PERRINJeff
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Default Perrin 2008 WRX: Wheels & Suspension


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While Subaru has done some things to make this car handle better then previous models, they have left some room for improvement. The beauty with the 2008 is there’s tons of room use some nice wide tires. On the PERRIN Performance car we used 245 wide tires which are perfect for zero rubbing issues. Its very similar to putting 225s on the GD body. I can’t wait until the 2008 STI comes out! Dare I say 265 or 275 with no issues???

So what kind of 245’s would we use? We went with, what I feel to be the best street performance tire around, Advan Neova’s. They are not quite R compound, but very sticky. Great to drive year round, and good enough for some light track days.



To keep the tires connected to the car, we used some Konig Feather wheels. These weight a pinch over 17lbs. Very good for a 17" rim, and at very reasonably price.



Our front sway bar and end links from the WRX/Legacy GT fit perfectly. We chose our PERRIN Performance 22mm front bar to help balance the new rear sway bar fitment we were building for this car. After some test laps in the car, we may even build a 25mm bar for the front. Our Legacy GT Positive Steering Response System worked great and Yes, the 2008 WRX has those stupid super soft rubber rear control arm mounts. The P.S.R.S. was a huge improvement to the handling as expected, and I think will be one of the most important suspension items for the new 2008 WRX/STI/LGT.



The rear OEM sway bar is a whopping 15mm thick. But why did Subaru make it so small? Many people think Subaru wanted to make the car under steer more to suit the everyday driver. After some measurements though, it appears Subaru was actually adding over steer.
The OEM GD body rear sway bar is 19mm and has an effective rate of 85lbs-in, compare to our 22mm rear sway bar which has a rating of around 240lbs-in on the softest setting. This new 2008 OEM 15mm bar is rated at around 130lbs-in, much stiffer then its big brother. How can do to its shorter leverage arms.

We choose to build a 19mm sway bar with 3 mounting holes for endlinks. One hole to effectively stiffen the bar, and one hole to effectively make the bar softer. The effective rates for the three mounting positions should vary from 260lbs-in, 340lbs-in and 440lbs-in. This allows the driver to “tune” the bar from either just a mild change from stock to a change that is more than 3 times stiffer than stock. Very noticeable from the drivers seat.

During the install of our shinny new red sway bar I went ahead and installed one our large volume diff covers. The PERRIN Performance diff cover allows for a higher volume of differential fluid and incorporates cooling fins to help cool the fluid and housing under load.





All of these parts wouldn’t really make much difference unless we could lower the car and stiffen up the suspension. This is the one thing that I don’t like about the 2008 car, its’ soft suspension. This might be because I am used to driving cars with stiff suspension, and it had been a while since I had been in a WRX, but either way its too soft. But that is a good thing as this gives us something to improve upon.

ALTA Performance (Parent company for PERRIN Performance) has been a regional distributor for H&R springs for almost 10 years. They are a leader in aftermarket suspension and always our first choice in coil over suspension.



Unfortunately nothing off the shelf would work for the 2008 WRX and Their factory in Germany has not begun production of the ’08 suspension, so we had them send us a few different coil over kits to see if we could make something work.
We did find a unique combination of products from Subaru and the unlikely use of some MINI Cooper parts to build a coilover kit that functioned perfectly.

The exact combination of parts is a secret, but was passed on to H&R as a starting point for their production kit. We now have the ability to lower our car that looks great and is very functional.




Side not for dealers and installers……

I know, its not the most glorious picture, but this is a nice feature of the new 2008! Now instead of lowering a car in just under an hour, i think it could be done in just under 30 mins.

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Last edited by PERRINJeff; 10-22-2007 at 10:33 PM.
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Old 10-21-2007, 09:00 PM   #2
PERRINJeff
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Old 10-22-2007, 11:49 PM   #3
choloman05
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cool! keep up the good work. Looking forward to reading more
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Old 12-08-2007, 03:25 PM   #4
WRX11
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Love the new developments, keep up the good work and let the wanna-bes follow.
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Old 12-10-2007, 11:40 AM   #5
PERRINJeff
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Thanks! We hope to help get the excitement going for the new hatches. Still seems to be some haters out there. Once that STI hits, i think peoples minds will change.
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Old 12-10-2007, 04:24 PM   #6
Sedlmeier101
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Is there going to be any love for the sedans? I love my sedan and I hope it's not left out in the mod department!

I'm assuming the FMIC is interchangable but what about the suspension? Is it the same between the hatch and sedan?
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Old 12-13-2007, 05:29 PM   #7
Paranoid Fabrications
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can you guys tell me if that rear diff cover fits the normal wrx? (06wrx)
Thanks
Shane
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Old 12-16-2007, 04:42 PM   #8
wuuusaa
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yeah it does look on there website

attached is linky b/c your probably lazy to look on there website
http://perrinperformance.com/product...ory=8&model=18
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Old 12-17-2007, 02:02 PM   #9
Paranoid Fabrications
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ahh, thanks I remember these from a wile ago and all they had were the STI ones, hence i was asking

Shane

Last edited by Paranoid Fabrications; 12-26-2007 at 06:40 PM.
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Old 12-18-2007, 08:51 AM   #10
wuuusaa
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not worth my time^^^^

Last edited by wuuusaa; 12-18-2007 at 04:33 PM. Reason: obivously i wasn't being a noob, someone needs to research
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Old 12-18-2007, 11:11 AM   #11
PERRINJeff
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Quote:
Originally Posted by Sedlmeier101 View Post
Is there going to be any love for the sedans? I love my sedan and I hope it's not left out in the mod department!

I'm assuming the FMIC is interchangable but what about the suspension? Is it the same between the hatch and sedan?
It not left out at all. Its just not the first one we built the exhaust and other parts for. The only thing that is different is the exhaust, everything else is the same. So check out our site, there are lots of things that fit right now.

Quote:
Originally Posted by Paranoid Fabrications View Post
can you guys tell me if that rear diff cover fits the normal wrx? (06wrx)
Thanks
Shane
Yup sure does! Hopefully you talked to John, and we got one shipping to you!
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Old 12-20-2007, 03:45 PM   #12
Paranoid Fabrications
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thanks guys, just ordered one. love it when company's come out with great products like this.

Shane
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Old 12-22-2007, 10:19 AM   #13
Pacobeagle
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Nice diff. piece.....I may have to add it to my wishlist for the "Green Lizard" SM autox project.
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Old 12-27-2007, 12:15 PM   #14
PERRINJeff
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Seems like not many people know about the diff cover. It is a great part for track guys or Autocross guys who really heat up their diff!
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Old 12-28-2007, 02:44 PM   #15
jymontoya
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Please post some pictures of the car lowered on the fat 245's!

Thanks!
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Old 01-10-2008, 11:35 AM   #16
PERRIN
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Quote:
Originally Posted by jymontoya View Post
Please post some pictures of the car lowered on the fat 245's!

Thanks!
Will do! Sorry for the delay! I will get someone on that ASAP!

If there is anything else we can do to help, just let us know!

adam.taft@perrinperformance.com

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Old 01-10-2008, 02:23 PM   #17
rlmd09
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Default Perrin parts

Hey Perrin guys,
when will these goodies be made available?

-RL
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Old 03-21-2008, 11:20 AM   #18
subyski
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What are the wheel specs (width and offset)?
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Old 03-28-2008, 09:26 PM   #19
terrymc
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Jeff
I to am curious about the offset and size on the wheel you used. And did you investigate how much tire could be used on a stock rim without interferance. I have seen where some people are advertising for the same wheel offset and size as previous generation wrx's but was not sure if they had actually looked at the car or are just assuming they would fit. Also does the P.S.R.S impact interior noise, I always like the idea of stiffening things up but this is a family car for us and I enjoy the quieter interior on the car. All additional information is appreciated as the car is so new, that information out there is lacking.
Thx,
Terry Mc
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Old 03-29-2008, 01:13 PM   #20
PERRIN
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Quote:
Originally Posted by terrymc View Post
Jeff
I to am curious about the offset and size on the wheel you used. And did you investigate how much tire could be used on a stock rim without interferance. I have seen where some people are advertising for the same wheel offset and size as previous generation wrx's but was not sure if they had actually looked at the car or are just assuming they would fit. Also does the P.S.R.S impact interior noise, I always like the idea of stiffening things up but this is a family car for us and I enjoy the quieter interior on the car. All additional information is appreciated as the car is so new, that information out there is lacking.
Thx,
Terry Mc

We have the wheels in partial stock now. They are a new offering from JIC/PERRIN and we should have better pics, prices and information on the website within the week and my apologies for the delay.

The PSRS makes little change to the interior NVH transmission unless you are on extremely uneven pavement, expansion joints or similar. If it becomes bothersome, you can always use the optional poly bushings instead. CLICK HERE

Jeff will also be back next week to answer in more detail is needed. PLEASE let me know how I can help in anyway further! Chat soon!

Adam.Taft@perrinperformance.com
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Old 04-06-2008, 07:34 PM   #21
ornge04gt
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Did you guys happen to res use the TPMS sensors in the new wheels?
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Old 04-06-2008, 08:53 PM   #22
PERRIN
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Quote:
Originally Posted by ornge04gt View Post
Did you guys happen to res use the TPMS sensors in the new wheels?
We should have them in stock now. If not more will be delivered ASAP!

Let me know how I can help in anyway further!

Adam.Taft@perrinperformance.com
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Old 04-06-2008, 10:29 PM   #23
ornge04gt
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Quote:
Originally Posted by Perrin View Post
We should have them in stock now. If not more will be delivered ASAP!

Let me know how I can help in anyway further!

Adam.Taft@perrinperformance.com
O I meant in your project car you guys have going on. Did your build team use the tpms sensors in the new wheels you put on your 08? or did you leave them out?
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Old 04-07-2008, 11:12 AM   #24
PERRIN
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Quote:
Originally Posted by ornge04gt View Post
O I meant in your project car you guys have going on. Did your build team use the tpms sensors in the new wheels you put on your 08? or did you leave them out?
AH HA! I have no clue. It is unlikely we added them to the WRX H/B but they will be to the STi.

Sorry for my misunderstanding!
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Old 04-07-2008, 02:26 PM   #25
ornge04gt
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So your low tire pressure light on dash is constant on?
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