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10-21-2001, 09:47 PM | #1 |
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How can I make a GT as fast as an RS?
I'm looking to get a 97-99 2.5GT wagon. The problem is it's slow. What do I have to do to make it as fast as a stock GC8 RS? It'd like to keep it NA. I don't think this is too unreasonable, as the RS isn't a fast car.
JC
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10-21-2001, 10:01 PM | #2 |
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well, the wagon isn't fast either, so it sounds like you've got what you want...
Actually, the wagons would be much nicer with more power. It sounds like a few thousand of those little green things we carry around in our wallets is what it will take. It will buy you some cobb tuning parts and other various pieces that will boost hp. |
10-21-2001, 11:33 PM | #3 |
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You didn't really specify what type of speed you are looking for. As far as straight line speed, corner speed, 0-60, 1/4 mile...auto-x etc.
If you want it to handle as well, then a modest suspension upgrade- springs/shocks/sway bar should do the trick. If you want 1/4 mile speed then a good intake exhaust/cam shaft/ AFC upgrade might do the trick. |
10-21-2001, 11:56 PM | #4 |
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Vehicle:1997 Legacy 2.5GT 1996 Impreza coupe |
Lose 300 pounds from the car. Your car will then be just as fast as an RS.
The drivetrain is identical in the two cars - same engine, same transmission, same gear ratios. The only difference is weight. So, strip the interior and replace the windows with Lexan and you'll be good to go. Seriously, I don't think the 2.5GTs are all that much slower than the 2.5RSs. I took my '99 2.5GT to the strip once and ran around 16-flat, and I've seen plenty of Impreza drivers post the same times. Some run faster, into the high 15s, but it's not a huge difference. And I've hung right with my friends in their 2.5RSs as we race off an on-ramp onto the highway. The 2.5GT will feel slower because it's a bit more luxurious and hence quieter - without the audible feedback it feels like you're going slower. Pat Olsen '97 Legacy 2.5GT sedan |
10-22-2001, 12:20 AM | #5 |
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I mean in straight line. What will it take to get mid 15s in the quarter? Who makes cams for the GT? Does anybody make an aluminum or CF hood for the Legacy?
JC |
10-22-2001, 02:32 AM | #6 |
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Chain your car to the bumper of the RS.
You should be able to get well into the 15s with an intake, exhaust, underdrive pulley, lightened flywheel, fuel pressure riser, and AFC. Along with the weight reduction. Any faster will require serious engine work. I think Cobb makes cams and cylinder heads for the phase II SOHC engine. I don't know if they make them for the DOHC 2.5L engine. -Steve |
10-23-2001, 01:09 AM | #7 |
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Hmmm, perhaps I need to re-think my decision.
JC |
10-23-2001, 02:01 PM | #8 |
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Vehicle:1999 Legacy 2.5GT 19 Audi RS3, 13 Armada |
If your looking to drag race the absolute best way to suprise the RSs would be a 50shot of nitrous.
Brad |
10-23-2001, 03:11 PM | #9 |
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There are CF hoods out there, i think GTBguy had a line on them at one point.
the motor and drivelines are identical; Cobb makes camshafts for both DOHC and SOHC 2.5's. Any power mod for an RS except exhausts and CAI's will work exactly the same on a legacy, you've just got 300 more pounds. There are tons of exhausts available, and there are intakes out there, too........... c'mon, man, come over to the dark side |
10-23-2001, 06:14 PM | #10 |
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You mean back over to the dark side, this would be my second Legacy. Are you sure Cobb makes cams for the DOHC? The aren't listed on their site. No nitrous either, well maybe, but I want it to be decently fast all the time.
JC |
10-23-2001, 07:59 PM | #11 |
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JC
Cobb does make cams for the DOHC. They are $800. pluss the stock ones. If you like JC i'll straight up trade you. Mine's a sedan, but it's got the extra weight.
Mike |
10-23-2001, 08:01 PM | #12 |
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Vehicle:1997 Legacy GT [email protected] |
Forgot one thing
IIRC in 1997 the Legacy 2.5GT Wagon was called the "Outback"
Then in 98 they called the 2.5GT sedan (like mine) the"Outback Sedan" Mike |
10-23-2001, 08:39 PM | #13 |
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Vehicle:1997 Legacy 2.5GT 1996 Impreza coupe |
No, there were "normal" Legacy and Legacy 2.5GT sedans and wagons from '97-99, and then there were the separate Legacy Outback wagons and (eventually - not sure what year) sedans.
Pat |
10-23-2001, 09:11 PM | #14 |
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I think the SUS (Sport Utility Sedans) were first released into production as 1998 (1998 1/2 ?) models. So far they are no manual shift SUS vehicles, and they(Subaru) tend to equip these and the 'Outback' stationwagons with fairly soft and 'floaty' suspensions.
While I personally like the height of the SUS & Outback vehicles, there are basically NO performance suspension setups available. |
10-23-2001, 10:23 PM | #15 |
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Vehicle:1997 Legacy GT [email protected] |
my fault. Were there really no manuel Legacy GT sedans? I have seen ONE manuel outback (98).
Mike yeah, my dad has an outback |
10-24-2001, 12:36 AM | #16 | |
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Quote:
what am I missing? -S |
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10-24-2001, 08:30 AM | #17 | |||
Scooby Guru
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Location: Where the Navy sends me...
Vehicle:1997 Legacy 2.5GT 1996 Impreza coupe |
Quote:
Quote:
Quote:
"Are we clear?" "Crystal, sir." name that movie for 5 bonus points Pat |
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10-24-2001, 09:32 AM | #18 |
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"A Few Good Men"
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10-24-2001, 03:01 PM | #19 |
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My outback wagon limited is a 5 speed. The only one on the lots in dallas at the time. Luckily, no one wanted it so I got a decent deal. Looked like it had been sitting for a while.
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10-24-2001, 11:49 PM | #20 |
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Sorry man, it MUST be a stick and I want a wagon. What are the advantages/disadvantages of the 2000+ over the older ones. Is the DOHC engine a much weaker power plant? I know there is no LSD, but that's not a huge concern for me at this point anyway. What's the weight difference like? Also, are the new ones less stiff due to the dual sunroof? A 12 sec Legacy wagon will be evil.
JC |
10-25-2001, 02:50 AM | #21 |
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JC - Well, you'd have to do lots of engine work to get 12s in an N/A Legacy GT wagon. I'd simply choose the DOHC design over the SOHC for one reason : Revs! With a Brullen equal length header unit + cat-back, gains of 21hp were registered on a SOHC RS w/o anyother power mods. (this was 21hp up from baseline). With a ECU/piggy back upgrade for fuel, ignition as well as intake and head/cam work, you should easily be able to make over 230hp @ flyhwheel. Add this with putting the wagon on a large diet, I can see farily good 1/4 mile times.
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10-25-2001, 12:53 PM | #22 |
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ahh. Rice math.
Roger |
10-25-2001, 01:35 PM | #23 |
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I intend to do an engine swap or turbo it when I graduate from college, that will be when 12s come. I can't see getting 12s out of an NA Legacy. I'm just concerned with having a slow car until then.
So, are you saying the DOHC engine has a higher redline? Anyone else car to comment about the DOHC vs SOHC thing? Do the DOHC Legacys have the bad MAF? Thanks for bearing with all my questions. JC |
10-25-2001, 02:38 PM | #24 |
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If I recall correctly, those 21hp gains were seen with a the headers+cat-back+CAI+pulley.
here's the link to where those numbers came from a 12 sec. legacy would be next-to-impossible without some MASSIVE HP. The fastest WRX in the USA is only barely nudging 12 sec. Of course, this doesn't discourage me from modding the heck out of my car . I'm just not building a drag-racing machine. -S |
10-25-2001, 02:48 PM | #25 |
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subarurabbit - funny thing you should say that. In anycase, you'll see shortly enough.
JC - Yes the DOHC design will allow for more power up top, the SOHC design runs short of breath very quicky. I'm in the process of bumping my redline up to 7200rpm (max stock valve train can handle). In anycase, headwork, cams, new hi-comp pistons etc will be necessary to get low 1/4 times. Weight is one big enemy, and if you're serious about drag, all metal that can be, will be displaced by CF. Windows w/ Lexan etc.. One large advantage the Legacy has over the Imprezas is better aero dynamics. monovich - FYI, the gain was based upon the stock car having a "CAI" and lightweight pulley. The 21hp @ the ground gain was ontop of the baseline. The CAI wasn't even a CAI, just some ducting routed to the filter box. My personal preference is not a 1/4 mile king, but a canyon carver It's much more full filling |
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