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Unread 04-09-2007, 12:42 PM
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Default 2007 Subaru WRX STI



Ever heard of keeping your friends close and your enemies closer? Well, this is somewhat a case for this. AST makes coilovers, we have Subaru guys asking for camber plates so we decided to buy one and do some testing. Mainly it is a daily driver that doubles for testing. We'll use it to push the M3 even faster. Back seat test driver shown in picture. Again, don't look for us to be the next Subaru/Evo tuning shop.

2007 Subaru WRX STI

Weight: 3150 pounds

Goals:
  • Daily Driver
  • Test mule
  • To never land a starring role in 3F3F
  • Car for events when it rains?
The Basics:
  • Vorshlag prototype rear camber plates
  • AST front camber plates
  • AST 4100 series struts f/r
  • AST 515/450 lb/in f/r springs
  • Cobb downpipe (soon)
  • Access Port 2.0 (soon)
So far:
  • Rides better than stock
  • Vorshlag plates give up to -3.8 degrees of camber (too much )
  • Boost buggies are fun, but let's face it, it's not a BMW.
  • One very expensive Impreza
  • Why can't I break the rear tires loose?
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Last edited by hancheyb; 04-09-2007 at 02:32 PM.
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Unread 04-09-2007, 10:39 PM
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Default Re: 2007 Subaru WRX STI

Quote:
Originally Posted by hancheyb
Why can't I break the rear tires loose?
Play with the adjustible center diff a bit and put on cheapie replacement tires... Worked for me!
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Unread 04-10-2007, 11:21 AM
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Default Re: 2007 Subaru WRX STI

You need to add some more pics of the car now that it's lowered. It looked pretty d4mn good last night.
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Unread 04-30-2007, 03:00 PM
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Default Re: 2007 Subaru WRX STI

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Originally Posted by McCall
You need to add some more pics of the car now that it's lowered. It looked pretty d4mn good last night.
Heh, well...it needs mudflaps at the moment. It was riding the bumpstops in that configuration so I had to raise it up. It seems to work better now.

Once I get the OK from AST for shorter bump stops, I'll do that plus it needs some VoMo camber plates up front. That should give me an inch of travel back. Stack up is so critical on these things since the factory piece was up in the opening of the tower, not flush up against it. Since we're doing CNC now, we can take even more stack up out of the plates, another 0.150" we think.

680/450 springs at the moment with a Cobb front bar and factory bar in the rear. 450 is probably too low, but I want to try it as is. The downpipe sure did help, but it still stumbles at 4k rpm. Can't wait to run it in this configuration on Sunday.

Next mod, revalve the shocks. They need more rebound and less compression from what I can tell. The rebound with these big springs has to be set pretty high, bottom 9 clicks or so are worthless so I figure if I add rebound and move click 10-12 down, I'd have the ability to turn it way up if I need to. The compression is just brutal on the street. Once we get the doubles working, that will fix that issue. Based on Fitzpatrick's finding, it probably needs that compression, but my kidneys don't need it.
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Unread 04-30-2007, 03:16 PM
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Default Re: 2007 Subaru WRX STI

Quote:
Originally Posted by hancheyb
...Can't wait to run it in this configuration on Sunday.
Sunday?
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Unread 04-30-2007, 03:24 PM
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Default Re: 2007 Subaru WRX STI

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Originally Posted by John in Houston
Sunday?
Ha, yes. I'm running Saturday AND Sunday. AST is here training us so we wanted to take Ronnie to some events assuming we have the time.
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Unread 04-30-2007, 03:53 PM
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Default Re: 2007 Subaru WRX STI

Quote:
Originally Posted by hancheyb
Ha, yes. I'm running Saturday AND Sunday. AST is here training us so we wanted to take Ronnie to some events assuming we have the time.
Cool!
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Unread 05-01-2007, 11:24 AM
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Default Re: 2007 Subaru WRX STI

Quote:
Originally Posted by hancheyb
The downpipe sure did help, but it still stumbles at 4k rpm. Can't wait to run it in this configuration on Sunday.
Someone with a Subaru we know mentioned a factory TSB software thing for a known low rpm stumble. Could be worth a call to the dealership.
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Unread 05-07-2007, 10:25 PM
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Default Re: 2007 Subaru WRX STI

Quote:
Originally Posted by Fair!
Someone with a Subaru we know mentioned a factory TSB software thing for a known low rpm stumble. Could be worth a call to the dealership.
Did not help the issue.

OK for an update. Changes to the car lately include:
  • 680 lb/in front springs
  • 515 lb/in rear springs
  • 1/16" toe out in front
  • 3.8 degrees of camber in front
  • 1.8 degrees of camber in rear
  • Custom valved Sportline 1 shock absorbers
  • Cobb front bar
  • Cobb down pipe
  • Borrowed SSRs and Yoks, thanks Paul Magyar!

The car feels pretty good. After Ronnie from AST revalved the shocks it is definitely better, but not perfect yet for street ride. It handles really well though!
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Unread 05-08-2007, 09:44 AM
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Default Re: 2007 Subaru WRX STI

Did the revalve take place before the autocross or after?
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