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Old 10-27-2003, 06:22 AM   #1
driver
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Default What would it take to get a 2004 2.5RS w/4EAT to do 0-60 in 7 seconds?

Hi. I was wondering what it would take to get a 2004 2.5 RS with the automatic transmission to do 0-60 in 7 seconds.

And....how much would it cost?

Thanks.
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Old 10-27-2003, 07:56 AM   #2
FstEddie22
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What is the e.t. for a stock 4eat to go to 0-60?
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Old 10-27-2003, 08:07 AM   #3
impreza2002
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take off the 2.5RS badge and replaces it with the WRX badge! Now your car will do under 7 sec in 0-60! haha =)
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Old 10-27-2003, 08:20 AM   #4
orndog
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By 7, do you mean 7 flat, or in the sevens?
Intake, exhaust, and lightened pulley will help appreciably, but I'm not sure of the stock time.
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Old 10-27-2003, 01:31 PM   #5
HndaTch627
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ummm the 4eat is going to have a prolbme pulling a 7 sec zero to 60 since the gearing sucks for an NA car. you'd need a massive amount of NA work. one with Cams/Intake ran 16.8. that's only 4tenths better then stock

Jeremy
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Old 10-27-2003, 04:59 PM   #6
Zen
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16.8?! At what altitude?
What do they run stock?
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Old 10-27-2003, 05:48 PM   #7
DrBoy01
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Yeah, that was DoctorNick's car that ran the 16.8. I don't remember the trap speed on that, either, if you're really interested, just do a search on "4EAT" in this forum. My thread on 4EAT performance should show up.

None of us know why Nick's car was still slow even after intake/cams, but I'd guess that the existence of the restrictive factory exhaust system would definitely cause a little sluggishness. Anything I can say at this point is all speculation, and I'm sure Nick could venture a better guess than I've made.

I have lots of mods on my 4EAT. Come to think of it, I've gotten a lot more in the past couple months, so I'll update the 4EAT performance thread with some new info later on tonight, if I get the chance.
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Old 10-27-2003, 07:06 PM   #8
wawazat
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and give it a tune-up.

3.3 + 4EAT will run in the 7's 0 to 60.
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Old 10-27-2003, 07:09 PM   #9
steve2k42.5rs
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hmm what do you think it would take to get my 04 RS 5M 0-60 sub 7?
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Old 10-27-2003, 07:40 PM   #10
DrBoy01
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Updated my old thread. Take a look here: http://forums.nasioc.com/forums/show...AT+Performance
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Old 10-28-2003, 06:40 AM   #11
driver
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Yes...I mean 7 seconds flat.

I read somewhere before that the stock 4EAT runs it in 9 seconds.

I suppose it would probably cost too much to get it down to 7 seconds.
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Old 10-28-2003, 08:27 AM   #12
FstEddie22
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I have yet to read about someone upgrading the TC for an RS. Supposedly you can gain about a sec in the 1/4 with a WRX. Also I read something about people modifying there valves? I guess that makes it shift faster?
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Old 10-28-2003, 11:20 AM   #13
RebelINS
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As I have posted before, I still can't figure out how he only ran a 16.8. Granted I have a MY00 4EAT RS, but I ran a 16.7@81 with just a Ganzflow intake on a very hot, humid summer day.

-Wes
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Old 10-28-2003, 11:39 AM   #14
HndaTch627
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rebel INS- you are also 400 lbs lighter then the GDA RS

even at 16.7 your zero to 60 was still + 8.0 seconds. and heat doesn't really affect a NA car, in fact the hotter it is the better it should run(tuned correctly)

Jeremy
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Old 10-28-2003, 02:40 PM   #15
DrBoy01
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I would think that it is turbo cars, not N/A cars, that perform just as well regardless of intake temperature, and that there are proven gains from using cooler, denser air with N/A engines. Ah well, I will defer to HndaTch627's judgment in this matter because he's more of a Scooby Veteran than I am (seriously). I don't mean to make this thread a debate about those things, though.

What I really want to do is get my 4EAT GDA to a dragstrip to see how it performs. I'm expecting about a low 16s run, but that's just my gut feeling. I haven't gotten any good numbers yet.

RebelINS, can you remember what kind of launch you used? It's been speculated that different techniques will yield different results, IE manually shifting vs. brake-torquing vs. regular ol' mashing the gas pedal. I think that if you did that well with only a Ganzflow at that temperature, my car that is 300-400 lbs heavier can do just as well with all my mods, if not better.
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Old 10-28-2003, 05:04 PM   #16
Kevin Thomas
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Lightbulb Welp

I've never driven an automatic 2.5RS. I also can not comment on an upgraded torque converter in an automatic 2.5RS but I'd think it would help out a lot.

If you have a stock auto 2.5RS and you are running say......16.9 in the 1/4 mile, I believe you can drop .5 off of your 1/4 mile time by doing this.

1) Use the brake torque method that's been discussed in the past:
a: At starting line, put shifter into neutral while foot is on brake,
b: Rev to about 2k rpm once (Taking your foot back off the gas pedal) and the brake pedal will sink to the floor *Do not lift foot off of brake*
c: Put shifter back into your lowest gear..Ex: 1 or 2 (I'll explain in a minute),
d: Mash gas pedal to the floor for no more than 3-4 seconds (not more than 4-5 with tranny cooler), then release the gas pedal,

2) Shift the gear shifter at 5600rpm in 1st and 2nd gear.....*Shifting at redline could cause you to bounce off rev limiter*

Just shifting the gear shifter in my Outback Sport allowed me to take off .3-.5 seconds in the 1/4 mile alone depending on how cold it was out, the low gear I have my shifter in, etc. The brake torquing technique should allow for you to shave .2-.3 seconds in the 1/4. This is on a completely stock car and is only speculation on the auto 2.5RS.

In other words, doing both of these I'd think you could go from a 16.9 to a best of 16.2 in favorable conditions. As for the other 1.3 seconds you'd seek in the 0-60, I'd say a torque converter mod, intake, exhaust and pulley. I wouldn't necessarily say cams since aftermarket cams are usually moving the powerband further up the powerband. You need torque as low and flat as possible on an auto without a torque converter mod....or even with one that has one. Other peoples opinions on this will vary. L8Rs...
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Old 10-28-2003, 05:11 PM   #17
Kevin Thomas
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Thumbs up Oh

Oh BTW: The Subaru FWD XT6 autotranny that I drive has been getting consistent 16.4 second 1/4 miles and I was just tapping into the 82mph range when I last checked. Stock hp/torque is 145hp/156lbs ft (20hp/20lbs,ft less than 2.5RS auto). Mods, intake, exhaust, pulley, Pro ECM Powerchip, modified valve body. FWD doesn't help but damn...I'm feeling pretty good right now. I thought the 2.5RS autos was in the mid to high 15's (Holding chest out with big curly bushy hair).
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Old 10-28-2003, 06:33 PM   #18
DrBoy01
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I'm hoping that you're right about the shifting advice, Kevin. I've tried it before and it made a pretty big difference.

My GDA 2.5 RS 4EAT is a lot heavier than other 2.5 RSes, so I'm betting that I can at least come close to or break the 16 second 1/4 mi. barrier with the mods that I have. As for 0 to 60 times, I have no clue, but I'll try to get a buddy with a stopwatch to help me this weekend.
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Old 10-28-2003, 10:07 PM   #19
RebelINS
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Quote:
rebel INS- you are also 400 lbs lighter then the GDA RS

even at 16.7 your zero to 60 was still + 8.0 seconds. and heat doesn't really affect a NA car, in fact the hotter it is the better it should run(tuned correctly)

Jeremy
That is why I noted that I have a 200 RS, because of the weight difference. I don't think that heat would have effected my time much, but I would think that when it is colder my car would run better. Wouldn't colder temps give me colder intake temps, which would equate to more HP? You definitely know your stuff when it comes to Subarus, so I would like to know what is wrong with my thinking.

Quote:
RebelINS, can you remember what kind of launch you used? It's been speculated that different techniques will yield different results, IE manually shifting vs. brake-torquing vs. regular ol' mashing the gas pedal. I think that if you did that well with only a Ganzflow at that temperature, my car that is 300-400 lbs heavier can do just as well with all my mods, if not better
The launch that I used was I had my foot on the gas and brake until my car reached it's stall. At that point I wouldn't add any more gas until the treee would turn, and then I would go full on the gas and take my foot off of the break. Of course I wouldn't have my feet on the gas and brake for very long because that heats up your trans. I just left the car in D. I never tried manually shifting, maybe if I ever go to the track again I will try that.

-Wes
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Old 10-28-2003, 10:30 PM   #20
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just a suggestion
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Old 10-29-2003, 12:09 AM   #21
Kevin Thomas
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Cool Oh

Oh BTW:

If you know what your 1/4 mile time is, you can guesstimate/calculate what your 0-60mph time is here:

http://www.tweak3d.net/videos/calcs/et.shtml

Just play with the 0-60mph until your calculation is what your actual 1/4 mile time was.
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Old 10-29-2003, 04:05 AM   #22
scotty305
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Default Re: What would it take to get a 2004 2.5RS w/4EAT to do 0-60 in 7 seconds?

Quote:
Originally posted by driver
Hi. I was wondering what it would take to get a 2004 2.5 RS with the automatic transmission to do 0-60 in 7 seconds.

And....how much would it cost?

Thanks.
Drive down a very steep hill?

Seriously though, if you wanted a faster car, why didn't you buy the WRX, or at least an RS with manual transmission? You might think about pulling the FWD fuse, this might help lessen the drivetrain loss. Read your owners' manual, the directions should be in there.

-s-
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Old 10-29-2003, 04:31 AM   #23
ommmjido
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NOS, turbo, or supercharger.

it'll take u ALOT money if ur planning to go all motor. even with a gc8 RS MT it takes some mods for it to break into 6 sec. i remember i've read somewhere the auto WRX runs 16.X in 1/4 mile, so go figure.
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Old 10-29-2003, 01:01 PM   #24
deviloftruth
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A few of you mention Torque Converters as an option. I posted a question about these in the Transmission forum but didn't get a response. I've heard they can make a good deal of improvments in acceleration. But the sites I've seen on the web only mention the WRX. Anyone know if the torque converter in the RS is the same, or where to go for one for an RS?
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Old 10-29-2003, 01:50 PM   #25
pdlindor
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Where did the 400lbs figure come from?

Last time I checked, the curb weight of a 2002/3 RS 4EAT was listed as 3020lbs, and a 2000/1 RS 4EAT coupe was listed as 2845lbs.

3020
-2845
_____
175 lbs

Even comparing the biggest possible difference (Auto GD RS Sedan @ 3020lbs vs. Manual GC RS Coupe @ 2795lbs), it's still nowhere near 400lbs.

The "weight issue" gets exaggerated every year.

~Paul
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