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Old 02-19-2001, 11:03 AM   #26
illmatic
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just make sure you are in the right gear. They had a UK review of the WRX vs. S4 and in 4th gear from 30-70 the WRX was 2 seconds slower than the S4. The link is now broken so I can't get the exact numbers.
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Old 02-19-2001, 11:11 AM   #27
bhickson
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Highway 395 in California, way up to Mammoth mountain. 2 lane road and there are campers and trucks that max out at around 65-70mph. But if I want to pass quickly, yeah, I might need to get up to 90 or so.

I definitely wouldn't be doing 90 on a residential 2 lane road or anything crazy like that
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Old 02-19-2001, 11:38 AM   #28
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No kidding, I've passed two semis at once on US54 at well beyond 90MPH-- I'm *not* going to loose control going in a straight line, and the less time spent in the wrong lane the better.

Anyway, I'm curious about the 0-100 accel of the WRX but I can't hardly imagine it being inadequate for 2 lane passing unless the pass can't be safely made.
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Old 02-19-2001, 01:00 PM   #29
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No, it seems to me that the JDM WRX has 22 more HP.

Sorry guys, but every test I've seen from the UK and US suggests that this car is kind of lacking on the top end. It's not because of drag either, .33 CD is pretty good. The Integra Type R is has a .31 CD. I'm not really sure why. I know the added weight has something to do with it, but that can't be it. I think there's either a difference in gearing or maybe the little turbo can't keep up and the high speed high rpm's. The car apparently will do 140+, but it will take you a while to get there.
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Old 02-19-2001, 01:25 PM   #30
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I remember reading that the problem is that the ECU bleeds off boost in the higher rpms. A revised blowoff valve setup coupled with an ECU upgrade will take care of this. I can't remember where I read it, but I remember the boost falls off to under 10 psi at rpms over 5500.

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Old 02-19-2001, 01:32 PM   #31
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In most small turbo applications, you want boost to fall off at high rpms because...

1) The small turbo is out of its efficiency range at high rpms and does not produce any more usable power benefits.

2) Small turbos spinning very fast at high rpms get very hot and grenade themselves.

Many companies doing chip upgrades for the Audi 1.8T start to taper boost at 5500rpms. Small turbos just can't deal at high rpms.

-Cy
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Old 02-19-2001, 01:50 PM   #32
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Hmm, I guess a VF22 or a big Garrett is in order then too...
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Old 02-19-2001, 01:58 PM   #33
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Any AWD car will suffer in roll on type acceleration. In my Maxima SE, Ive raced a few friends who own modded Talon AWD Turbos. On the track, they decimate me by about 1 second in the quarter. (The Talons run about a 13.4 to my best of 14.3.) But, on out the street from a 15 mph roll, we are door handle to door handle. Without the benefit of the launch, and AWD car is dead in the water. The driveline loss is huge. This is the dilemma I am facing now in deciding on whether or not to get a WRX or keep my 2000 Maxima SE 5 speed.
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Old 02-19-2001, 02:10 PM   #34
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This is what I'm sayin'. And .33 is not that great. BTW where is everybody getting this .33? Just wondering...I'd like to see it for my own eyes. .30 is pretty good. The new VW Passats are .28. That's how they get those 150ish HP HEAVY boats to 145 mph. A E R O D Y N A M I C S is everything. Look at the VW VR6 GTI it has 172 V6 HP and it is "drag limited" to 140 I think, but the Jetta will go faster and the Jettas' heavier!
Air is the enemy at high speeds (80+mph) IT'S A FACT.
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Old 02-19-2001, 02:11 PM   #35
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No Eby,

There is something else going on here. Going from 215hp to 245hp or increasing power by ~12% will not equate to a 2.5 second reduction in 0-100mph times, no mater how you slice it.

Autocar driver maybe missed a shift. The US car should be mid 15's 0-100.

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Old 02-19-2001, 03:01 PM   #36
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WRXRob, do you really think they'd publish times where they missed a shift? 12% horsepower increase is a lot. Especially when a lot of that is on the high end.

Brahmzy, all I'm saying is .33 is not bad, which it isn't. Its about average for a sporty car. Like I said the ITR is considered to have really good aerodynamics and it has a CD of .31. The Passat may have better CD but it will actually create more drag because its a bigger car than the WRX.
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Old 02-19-2001, 03:10 PM   #37
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Check out bbs.scoobynet.co.uk for ideas on how quick the car goes above 70 mph racing company reps (and other WRX/Turbos) on the motorways of England, Wales, Scotland and Ireland. A lot of UK owners are too chicken to race anything other than easy-meat BMW 318i or Vauxhall Vectra, these cars being the scourges of the self-styled "individualistic" WRX owner, so how fast it really is we'll never know (until we drive one of course). I don't think it's massively fast at very high speeds - small-ish turbo and drag factor conspiring to limit response above 100 mph, according to what I've read - but as has been mentioned before, the car is not designed for bahnstorming.

4th gear 30-70 mph is a valid comparison if your overtaking maneouvres involve NEVER changing down. They are a theoretic measure of engine flexibility, that's all, not outrighy grunt (if you want outright grunt, change down first).

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Old 02-19-2001, 03:10 PM   #38
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Check out bbs.scoobynet.co.uk for ideas on how quick the car goes above 70 mph racing company reps (and other WRX/Turbos) on the motorways of England, Wales, Scotland and Ireland. A lot of UK owners are too chicken to race anything other than easy-meat BMW 318i or Vauxhall Vectra, these cars being the scourges of the self-styled "individualistic" WRX owner, so how fast it really is we'll never know (until we drive one of course). I don't think it's massively fast at very high speeds - small-ish turbo and drag factor conspiring to limit response above 100 mph, according to what I've read - but as has been mentioned before, the car is not designed for bahnstorming.

4th gear 30-70 mph is a valid comparison if your overtaking maneouvres involve NEVER changing down. They are a theoretic measure of engine flexibility, that's all, not outrighy grunt (if you want outright grunt, change down first).

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Old 02-19-2001, 03:14 PM   #39
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Eby, what do you mean the Passat will create more drag than the WRX. What do think CD is? The DRAG coefficient unit of measurement. If the Passat has a lower .28, than the WRX's .33, then that tells us there is a lot LESS drag with the Passat. That's how they measure drag. Short or long doesn't matter if the numbers are lower!
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Old 02-19-2001, 03:23 PM   #40
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QM: 14.5s @ 95mph
0 to 100: 16.9s

Notice the QM was done in 14.5 seconds with a final speed of 95 miles per hour.
Getting to 100 shouldn't take 16.9 seconds, if you can reach 95 in 14.5.

Obviously the driver in this test screwed up the 0-100 run.

Numbers such as these can vary widely among different tests. For example, I have seen 0-60 times anywhere from 5.5 to 6.7 secs.
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Old 02-19-2001, 03:25 PM   #41
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Guys, this is no surprise. The RS is the same way--useless over 100mph. If you've driven any newer German car...you know that 80mph is when those cars just start to get fun...all the way up to the mid 100's. They seem to "squat" and come alive at over 100mph. Performance actually gets better! With the Subarus, anything over 100 is a battle between you and the car and the wind and stability. Yes I know they'll get close, but it takes a long time. THIS IS NOT WHAT SUBARU DESIGNS THEIR CARS TO DO. German auto giants specifically design their to perform well at 100+ speeds regardless of weight and power. Torque curves, gearing, aerod's, etc. Just an opinion but I've owned many a German car and many a Jap car.
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Old 02-19-2001, 03:35 PM   #42
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Coefficient of Drag and Drag are two totally different things.

Drag = Drag Coefficient x 1/2 Density x Velocity Squared x Surface Area

If you had a full scale car and an identical 1/24 scale car they would both have the same CD. However the larger one would have more force pushing against it(drag) because of the larger surface area.

[This message has been edited by Eby (edited February 19, 2001).]
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Old 02-19-2001, 03:37 PM   #43
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Thanks Eby! I have been wondering about the exact formula. I knew the general idea, but not the exact formula.
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Old 02-19-2001, 07:30 PM   #44
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Nice catch scott!

So it should take about 15.5 or so to get to 100. Assuming you have to shift.
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Old 02-19-2001, 08:54 PM   #45
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Lord Atak caught the time discrepancy from 0-95 (the quarter mile) and 0-100 first. Give him the credit for noticing that because I just got it from his post on the first page.

Scott
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Old 02-19-2001, 09:03 PM   #46
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Nice catch Lord Atak!
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Old 02-19-2001, 09:59 PM   #47
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The gear ratio!They are close.But if you check the gap between 3,4 and 5 gear.From 4 to 5 gear, there is a big gap.It just like the lancer Evolution also.You will feel like you car loose power when you shif from 4 to 5 gear!!
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Old 02-20-2001, 12:17 AM   #48
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This seems like a lot of guessing.... Anyone got any hard facts like tests, etc....
Secondly, I own a 99 Si and I really cannot imagine a WRX being slower on the highway...

Jerry
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Old 02-20-2001, 12:33 AM   #49
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The JDM WRX did it in about 14.5 or so seconds. Seems like the Autocar tester took a nice long leisurely shift from 3rd to 4th just before the 100 mark.
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Old 02-20-2001, 05:49 AM   #50
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FWIW, I just "built" a US-spec WRX in CarTest, and ran it against a '95 GTI-VR6 and a '97 RS2.5 Here's what it came up with 0-100mph:

WRX 16.7
GTI 19.9
2.5RS 22.8

Disclaimer - CarTest is a program that runs on a Microsoft OS, so the results are suspect! Take them with a grain of salt, but generally CT is usually pretty accurate. BTW, CT came up with a 5.5 0-60 for the WRX!
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