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Old 01-31-2003, 12:17 AM   #1
Scooby South
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Default Touchy feely....stuff...(Turbo, uppipe and other news)

Well....I have seen some of the goodies that are on this beast....so I will pass them along...My Regional Parts Rep confirmed some other items as well...
  • VF34 Turbo....Confirmed
  • Catless Uppipe...Confirmed
  • Current WRX aftermarket Exhausts will bolt right up
  • Suspension is on the rear is TOTALLY different
  • different Rear Sway bars
  • Different Rear Control Arms
  • Don't think Current Aftermarket Suspensions will bolt up (have to really tear one down to see)
  • Wireless Throttle IS wired to the ECU

I am supposed to get the STi Parts Book Next Month, according to my REP...The first thing I am going to try to get is a ECU to send off and see what we can do with it...

More as I know it...

Scooby South AKA Prestige Subaru
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Old 01-31-2003, 12:45 AM   #2
MPREZYA
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Then I am guessing that they changed it for production since I got a picture of the Pre-Cat at the petersen show.
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Old 01-31-2003, 01:04 AM   #3
StiDreams
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Thanks for the info. Can you please post the picture or point me to the link.

Thanks again,
Ziggy
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Old 01-31-2003, 03:20 AM   #4
JT-KGY
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Could someone give a little more detail on the VF34??
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Old 01-31-2003, 03:26 AM   #5
JT-KGY
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After a little search... found this..

Quote:
IHI VF34: This is IHI's newest bolt on upgrade for your WRX. This turbo was originally introduced on the Limited Edition STi Type RA Spec C. As of 10/01, this turbo comes standard on all STi versions in Japan. This turbo features the same specs as the VF30, but features an all ball bearing center section for even faster spool (about 250 rpm faster than the VF30 according to IHI).
Isn't the old Spec C turbo a twin-scroll one??
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Old 01-31-2003, 05:41 AM   #6
ellisnc
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I believe the only thing different about the rear control arms is the way the stabilizer bar mounts to them... they would have changed the rear subframe and hub carriers to make any REAL changes
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Old 01-31-2003, 08:26 AM   #7
VetteVert
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Wow. A VF34 (small for 2.5L high output IMO) and they are making 300/300 at factory boost levels. This car has so much more in it. Regardless if you buy one or not, this will definitely raise the bar for future options. Always a good thing

VV
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Old 01-31-2003, 01:40 PM   #8
ToddStratton
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Yes, I thought I saw the upipe picture that had a cat. If not, good deal!

The new JDM STis use an IHI twin-scroll turbo, but I don't know the name in "VF" terms.

Lots of posts in FFI on comparisons between the 30 and 34. I've read some folks think the 34 spools quicker, and others say the 30 is more durable. Another good post on turbo comparisons is http://forums.nasioc.com/forums/show...readid=278517.

This thing is going to be a hoot to drive. VF34 with 2.5L....sounds like a nice torque curve!

TRS

Last edited by ToddStratton; 01-31-2003 at 02:01 PM.
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Old 01-31-2003, 02:50 PM   #9
Coati
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Default Re: Touchy feely....stuff...(Turbo, uppipe and other news)

Quote:
Originally posted by Scooby South
[*]Catless Uppipe...Confirmed[*]Current WRX aftermarket Exhausts will bolt right up
Interesting. So two cats on the STi? I wonder if the STi's turbo-back exhaust flows any better than the WRX's? Are the two rear cats the same?
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Old 01-31-2003, 05:31 PM   #10
Ziglabeu
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What is the size of the stock exhaust( cat back) on the USDM STI ? 2.5" ? 3"?
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Old 01-31-2003, 06:35 PM   #11
ellisnc
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all I know is that with a 3037 this car is going to scream!!
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Old 01-31-2003, 07:17 PM   #12
bemani
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Default Re: Touchy feely....stuff...(Turbo, uppipe and other news)

Quote:
Originally posted by Scooby South
[*]Don't think Current Aftermarket Suspensions will bolt up (have to really tear one down to see)
According to the Hyperrev magazine, the new chassis uses a new rear strut top hat for the strut. That one thing is different at least, so it won't just 'bolt up'.
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Old 01-31-2003, 07:32 PM   #13
Alleggerita
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No pre-cat sounds great if true. I guess AVCS and tumble valves may have helped to get it clean enough.
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Old 02-01-2003, 01:45 PM   #14
Red Rocket
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Quote:
Originally posted by VetteVert
Wow. A VF34 (small for 2.5L high output IMO) and they are making 300/300 at factory boost levels. This car has so much more in it. Regardless if you buy one or not, this will definitely raise the bar for future options. Always a good thing

VV
I don't get what you mean. A VF34 is perfect for factory 300 hp, it doesn't matter much if it's a 2.0 or 2.5L engine. You'll get around 350 hp with a chip and exhaust, just like a "Stage 4" wrx. Not suprising at all, I called this 3 weeks ago. Does this mean that the shortblock is completely bulletproof? No.

Happy to see the catless uppipe stock.

Kevin
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Old 02-01-2003, 02:09 PM   #15
T-WRX
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I'd rather see the uppipe cat standard. Then it is that much easier to raise the performance bar. Many of us already know how to swap/gut an uppipe. . .
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Old 02-01-2003, 08:03 PM   #16
ToddStratton
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Quote:
Originally posted by T-WRX
I'd rather see the uppipe cat standard. Then it is that much easier to raise the performance bar. Many of us already know how to swap/gut an uppipe. . .
Huh? It will be very nice to avoid the whole uppipe install/leak/fix process. There is still so much room for power improvement...it will be easy to raise the "performance bar."

TRS
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Old 02-01-2003, 08:46 PM   #17
VetteVert
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Nothing is bulletproof. But people are getting more than STI power on the stock cast bottom end of a standard WRX. You know the forged bottom end of the STI can take more than it's cast equivalent (if not, something's wrong).

The turbo...it matters A LOT the size of the engine. More exhaust gas energy means easier spooling of a turbo. 2.5L will spool a 34 hundreds of rpms quicker than a 2.0L. I'm not surprised at 300hp...I'm saying how this can be much higher with a proper sized turbo. While maybe not to the same extreme, the 34 is a small turbo for the STI just as our TD04 is a small turbo for the WRX. Forged bottom end + stronger gear box + 2.5 liters just screams garret conversion.

If I was going to stay with stock engine management and whatnot, I would sell the 34 immediately and use that cash (at least $1k) for a catless downpipe and a VF22 (may not last forever, but for low $700's...). Plop an ABC boost controller in the mix for slightly higher than stock boost that still tapers and you have an easy HP bump for 0$.


VV

Quote:
Originally posted by Red Rocket


I don't get what you mean. A VF34 is perfect for factory 300 hp, it doesn't matter much if it's a 2.0 or 2.5L engine. You'll get around 350 hp with a chip and exhaust, just like a "Stage 4" wrx. Not suprising at all, I called this 3 weeks ago. Does this mean that the shortblock is completely bulletproof? No.

Happy to see the catless uppipe stock.

Kevin
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Old 02-15-2003, 05:46 PM   #18
StiDreams
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Hey Scooby South,

Any more stuff from the manuals?

Thanks
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