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Hey guys,

Just have a question. Looking at the pic here:
http://www.subaru-svx.net/photos/files/SVXDriver/5824.JPG

It shows the red line at 7000, I was just wondering because I remember reading that the red line was suppose to be somewhere arounfd the 8-9K range. Is this because of the larger engine? Or something else that I don'e know about. Credit for the pic goes to 91TB78

Thanks,
Jared.
 

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Hey All,

Maybe I should start a new thread for this question but I was wondering about the set of lights next to there the DCCD light is. It says "Auto" and right below that it says "Lock" and below that are a bunch of arrows pointing down. Is that so you tell what setting you have the center diff at. Or is it something completely different.

Thanks
Jared
 

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Haha I like when it says don't adjust the DCCD when any of the wheels are in midair...so they expect you to catch air from time to time?

Would it also be ill-advised to mess with the DCCD if the car were up on a jack?
 

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Check out this tach pic:

http://impreza.subaru.com/microsites/impreza/wrxsti/gallery_popup.jsp?picID=1&secID=0

If you look carefully you can see that the indicator tab for 7000rpm is white, while the tab for 8000 is red. The current WRX's have a 7000 redline, and the 7k tab is red. This leads me to believe that the US STi has a redline of 8000; there's been a lot of speculation to this end.

Also, the NA auto show STi is "preproduction", so it's possible the guages will be changed for production models.
 

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Anonymous said:
This leads me to believe that the US STi has a redline of 8000; there's been a lot of speculation to this end.
This picture leads me to belive that the tach is from a JDM version.
 

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Nuts, you're right prost893. The little LED (shift indicator?) is above the "1000x r/min" label on the JDM, but below it on the US preproduction model.

*sigh*
7k redline it is.
 

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For me, the problem isn't the 7k redline, but the 300 hp peaking at 6k. That's a whole 1000 RPMs in the band where power is actually decreasing from peak. There's really no point to an 8k redline if your engine runs out of breath at 6k.

What they really need, then, is a turbo that will pull strongly all the way to 7k without sacrificing the low end. Like, maybe... ahem... twin-scroll... <cough>. Or a dual ball-bearing setup.
 

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I dunno about you guys, but I rarely run my WRX higher than 4k rpms anyway, I'll hit 5k occasionally, and that's probably how I'd drive the STi as well...by the time it hits 6k you're already going pretty damn fast, well for LA anyway due to all the traffic...
 
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Proposed STi Allocations

The twin scroll equipped 2.0 liter engine had an 8000 RPM redline. The US version has been bored and stroked. Longer rods mean higher piston velocities (since they have further to travel). That means higher momentum/inertial loads, which means higher stress on the internals.

These stresses can be brought under control by lowering the redline. It is basic engineering/physics.
 

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Agent Chobos said:
For me, the problem isn't the 7k redline, but the 300 hp peaking at 6k. That's a whole 1000 RPMs in the band where power is actually decreasing from peak. There's really no point to an 8k redline if your engine runs out of breath at 6k.

What they really need, then, is a turbo that will pull strongly all the way to 7k without sacrificing the low end. Like, maybe... ahem... twin-scroll... <cough>. Or a dual ball-bearing setup.
I agree. How does this compare to the JDM Sti in ternms of peak HP, torque and redline? I have not seen that info that I rember.
 

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The WRX redline is at 7k.

I usually need mo more than 5-5.5k on my WRX and believe me the car does not groan or sounds pressed. I usually do not go beyond 4k as SnowbordrWRX mentioned. Keep in mind that the the cut out is a bit more than 7k rpm on the WRX as I have seen it on many WRX dyno runs. I would imagine it can be as high as 7.2k.

Cheers

Nick
 

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The "safety cutoff" is at 7200, but I wouldn't recommend bouncing off it too many times. The engine can handle it fine, but if you're not expecting it it can be unnerving to say the least. In my opinion, the WRX is happiest over 4 grand. I never go over 4k until the oil temp is up over 120, then I wind it like it was designed to be wound.
 

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when i first went to test drive the sti, the salesman said "the cool thing about the sti's is that they have no redline" i looked at him and realized that he was dumb, and didn't really know what he was talking about... i set the light to my liking on that drive.....4k....later went to 6k.....pretty!!!
 

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Ok, for the US spec STi, the peak torque is at 4k, and peak hp is at 6k, so there is not point to shift at 7k, 8k, or 9k! Just set the dial to 6k for max hp!
 

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titsataki said:
I never bounced off the cut off anywhere besides a dyno run.
take it to a road course. :) i bounced off the cut many times. no ill effects. (after all, it exists to prevent ill effects.)
 
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