Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

Newb Here: Sti Top Speed

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Old Apr 21, 2005 | 10:06 AM
  #2  
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I don't know about the STi, but according to Cobb the WRX governor kicks in at 158 mph.
Old Apr 21, 2005 | 11:09 AM
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RWD, FWD, AWD these will have nothing to do with how the fast a car can go or how fast it will reach its top speed.

There was a thread on here a while back that said 145ish was the top speed. Now IIRC, after 120 it was slow going, but that might have been for the WRX. These are small engined turbo cars so top end pull will suffer. You can of course always get a larger turbo to get around that top end lull.

Do a search for the thread: max out in Colorado. Or some thing like that.

. Z28 turbo, 300Z fully built
Well ok, two modfied cars against a stock STi, that seems like a fair comparo. Seriously though you can mod an STi and make it just as fast. Have you seen the track built STi thread, the owner guy says it pulls like a V8 and he's "only" putting out 306WHP. You have people like SubyDude with 400+WHP, I can't remember his exact WHP number.

The STi might not be a great drag because the AWD will typically make it start a bit slower than a RWD car, but on the freeway starting from a dead stop usually isn't a problem you need to be worried about.

Also, tell your friends to slow it down and think of the other people on the intersate.

Last edited by silentbob343; Apr 21, 2005 at 11:30 AM.
Old Apr 21, 2005 | 11:16 AM
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MY Sti pulls hard all the way to 155MPH, Don't think you'll have to worry about anything
Old Apr 21, 2005 | 12:04 PM
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Originally Posted by gilmore25
MY Sti pulls hard all the way to 155MPH, Don't think you'll have to worry about anything
Same here. The first time I did it I was amazed at how comfortable the car is at speed. It's very deceptive. The question you really have to ask is how many times will you ever have the oppurtunity to race at over 120 not to mention exceeding that speed on public roads is RETARDED. At that speed you have no reaction time and people aren't expecting to have a car approaching them at that speed so they might accidently or inadvertantly do something that could get you and/or them killed.
Old Apr 26, 2005 | 06:28 PM
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How accurate is the speedometer at that speed? Don't they usually begin to be off by 5 or so mph's. But the STI is so smooth at high speeds, you can tell there was time spent on the aerodynamics. I have had mine to 150mph. Very suprised, prolly never do it again, unless the time calls for it, but now i can say i did it.
Old Apr 26, 2005 | 06:54 PM
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your speedo @ "60 mph" is usually +/-3 factory.

edit: something that's actually not a bad idea to do is to take a friend with a stopwatch and get on the freeway, set cruise to an indicated 60mph and clock your distance between mile markers seconds per mile = miles per hour
Old Apr 26, 2005 | 07:36 PM
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HAHA my dad did this on a cross country trip in the 70's. He totally unhooked his speedo, etc.. so it wouldn't put miles on it and that's how they checked their speed.
Old Apr 27, 2005 | 07:16 AM
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or you can use a GPS device most will give you a speed reading.
Old Apr 27, 2005 | 01:03 PM
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i think i'd rather pay $1 for a stopwatch . . .
Old Apr 27, 2005 | 05:36 PM
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Well, if you already had one or had a friend with one. Buying a GPS unit for speed testing alone is a bit silly.
Old Apr 27, 2005 | 06:31 PM
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Originally Posted by silentbob343
Well, if you already had one or had a friend with one. Buying a GPS unit for speed testing alone is a bit silly.
true, but I prefer the KISS approach: Keep It Simple, Stupid
Old Apr 28, 2005 | 03:02 PM
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Originally Posted by 1reguL8NSTi
Same here. The first time I did it I was amazed at how comfortable the car is at speed. It's very deceptive. The question you really have to ask is how many times will you ever have the oppurtunity to race at over 120 not to mention exceeding that speed on public roads is RETARDED. At that speed you have no reaction time and people aren't expecting to have a car approaching them at that speed so they might accidently or inadvertantly do something that could get you and/or them killed.
Going fast isnt a bad thing but when you are racing over 100mph your asking to get locked up... I would know this because I have already done 1 overnighter.. it wasn't the smartest idea to top out my car..
Old Apr 28, 2005 | 04:45 PM
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I wasn’t paying much attention but when I did look down at the Speedo. It was dam close to 160mph.. FYI.. It was insane.. There is no need to go that fast on a public road... Yes i am a hypocrite. I hope that answers your question. FYI it also pulls all the way to the end.. It felt like it still had more..

Last edited by MotorCitySTI; Apr 28, 2005 at 04:47 PM. Reason: add to it



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