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Old 12-29-2001, 12:11 AM   #1
Patrick Olsen
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Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
1996 Impreza coupe

Talking My 2.5GT in "stealth mode" at the track

At the last open track event I attended one of the 2.5RS drivers and I both decided to convert our cars to high speed/low drag stealth mode. Off came the rear spoilers, on went the black duct tape to cover up the hood scoop. Surprisingly enough, the aerodynamic changes resulted in my terminal speed at the end of the front straight staying exactly the same. Anyway, just thought I'd throw a couple pics on here.




Pretty sweet, eh?

Pat Olsen
'97 Legacy 2.5GT sedan
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Last edited by Patrick Olsen; 11-07-2005 at 02:56 AM.
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Old 12-29-2001, 12:54 AM   #2
monovich
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It looks kinda odd without the spoiler, but I dig the car. what size are those wheels?
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Old 12-29-2001, 09:42 AM   #3
Patrick Olsen
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1996 Impreza coupe

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They're 15x7" Racelines with 225/50-15 V700s. So, even though the car is lowered 1", the fender gaps look big because the tires are 1" shorter than stock.

Pat
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Old 12-29-2001, 10:21 AM   #4
froggert
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i don't think our spoilers do a whole lot drag or downforce-wise. seems like they're designed for looks only.

but if you were to try low drag/stealth mode again, what about taping over the door-handle spaces? i wonder what effect a big skidplate like primitive's has on aerodynamics, too..

roger
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Old 12-29-2001, 11:20 AM   #5
HIHO
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Hey Pat could you list your mods? Is that a Stromung? I have grown into a fan of function that is why I won't lose the factory wheels. Please tell us why you went to 15". Have you done any internal work on the Phase 1? I think I remember you saying that you had the 1-2 combo. I am really wanting to do some internal work so all the info I can get the better. Thanks.
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Old 01-01-2002, 11:44 PM   #6
remarcable
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On the outback I notice less wind/road noise from under the front of the car with the Primitive skid plate on.

Haven't tested for top-speed yet though.
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Old 01-02-2002, 01:08 PM   #7
Mike2000GT
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Pat, I think Tony saw some increase in TS at the end of the straight... but he did say the car was just a little bit more loose w/o the spoiler... (but that could just be his driving... )

I bet it will make a difference at VIR...

HIHO, from what I remember of Pats mods, that is the MRT full exhaust, no internals mods, and the 15s are only for track/autox.

I've got some picts of tonys ride somewhere... lemme see if I can dig em up...
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Old 01-02-2002, 02:39 PM   #8
Patrick Olsen
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1996 Impreza coupe

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HIHO - Mike pretty much hit the nail on the head. The engine is all stock, it's just on its 3rd set of head gaskets at 87k miles.

The exhaust is the full MRT setup - headers, hi-flow (?) cat, midpipe, muffler. It is currently off the car due to dyno testing gone wrong - along story, search for "MRT" and "dyno" in the NESIC Forum and you'll probably find it. The short version is I dyno'd the car with the MRT on it, pulled the car off the dyno, installed the full stock exhaust, and then re-dyno'd the car. The stock exhaust gave 10hp more than the MRT, which still doesn't make any sense to me. I will be going back in the next week or two to reverse the testing (dyno with stock exhaust, then re-install MRT and dyno again).

As for the 15" wheels, I originally picked up a set of the 15x6" Legacy L 5 spoke wheels with snow tires from the Tire Rack. My plan was to use them for snows in the winter and Kumhos in the summer. I quickly realized that the 225/50-15 Kumhos were just too damn wide for the 6" alloy wheel, so I needed to get some different (wider) wheels. I like the 225/50-15 because it is 1" shorter than stock - hence it lowers the center of gravity, gives a slight gearing advantage, and gives greater clearance to the fender lip to prevent rubbing. With the stock suspension on the car (as it was when I picked up all the 15" stuff) that last bit was very important, as you can see in these pictures:


The first picture shows my old '99 at its (and my) very first track event. Stock wheels with stock-size Yoko Nexus street tires, stock suspension with 18mm rear bar. Note where the rear tire is relative to the fender lip. The second picture shows the same car, same suspension, with the 15" Kumhos on the 15x6" wheels - note the clearance to the fender lip. If I was using 225/50-16s rather than 225/50-15s, I probably would have been rubbing. Another good picture is here: http://members.i-club.com/ViewMember...49&PicNumber=3 - that's my current car, same corner as the first picture above, still on the stock suspension, but now with the Racelines and Kumhos.

I now have DMS Golds on the car, and the shorter tire comes in handy with this setup, too. With a pretty decent amount of negative camber in the rear and the fat Kumhos, tire-to-spring perch clearance is pretty tight. With the shorter tire I can move the spring perch down a bit lower without worrying about actually contacting the tire.

OK, so the full summary of my mods:
- DMS Golds with STi top mounts (will probably get Cusco caster/camber plates for the front in the very near future)
- Whiteline adj rear sway bar
- SS brake lines
- ATE Super Blue fluid
- Mintex 1155s all around for street/auto-x use, race pads up front and 1155s in the rear for track use
- K&N filter (of course )
- Synthetic fluids throughout - Mobil1 oil, Redline 75W90NS tranny fluid, Mobil1 rear diff fluid
- MRT full exhaust (currently sitting in my garage)
- STi short throw shift lever
- 17x7" UK WRX wheels for street use - awaiting tires, just got them recently
- 15x7" RL-7s with Kumhos for auto-x/open track use - wheels will probably be replaced by 15x7.5" or 15x8" Volk TE-37s in the near future to lose lots of unsprung weight
- Primitive front STB, Cusco or SYMS rear STB to be added eventually

I think that's about it.

Pat
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Old 01-02-2002, 04:08 PM   #9
2.5GT
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Pat,

You know, this is the first time I ever saw pictures of your 99! I'm so used to seeing that silver GT of yours

Jason
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Old 01-02-2002, 05:16 PM   #10
Patrick Olsen
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1996 Impreza coupe

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Yeah, I miss my old baby. As much as I like my current silver car, I still absolutely love that dark green color. I wish 5 speeds weren't so hard to find, and I wish I had had more time to search for a green one. *sigh* I saw a used '97-99 green GT wagon on the local Subaru lot today, and briefly entertained thoughts of trading, but of course the wagon is an automatic. Oh well...

Pat
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Old 01-03-2002, 10:51 PM   #11
silverSurfer
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hey pat,

i got a 5spd Gt Ltd.

but it's not for sale quite yet... (until the Legacy Turbo comes out )

-chrisC
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