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Old 02-07-2002, 08:28 AM   #1
Freak Show
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Lightbulb Australian WRX and STI APS hp numbers

I'm looking for reasons not to the get the WRX STi if it ever comes out.

Here is one reason so far.

The stock HP for the Australian WRX is 220hp + or -.

The stock HP for US WRX is 227hp + or -

Stating this the Australian and US WRX motor is the basically the same.

The Australian WRX STI puts out 261hp +or-.

Assuming the US gets the STI it will be rated at 261hp + or -.

APS can boost the WRX from 227hp to 320hp with the RT Spec kit.

APS makes a Sprint Spec kit for the STI boosting HP form 261 to 320.

The only difference between the kits is the RT Spec kit adds a turbo.

This leaves me to believe that the only difference between the Australian WRX motor and the Australian STI motor is the turbo!!!
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Last edited by Freak Show; 02-07-2002 at 08:13 PM.
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Old 02-07-2002, 09:36 AM   #2
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If you ever talk to them, ask them if their WRX has a closed or semi-closed deck like the STi does and how long the block will last pushing that much hp, consistantly, in the WRX.

I should say the STi would last longer in the long term.

--kC
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Old 02-07-2002, 09:48 AM   #3
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The difference between a WRX and an STi are more than just the turbo! You can't base it on what a vendor does to the car to get the same hp. The STi has a different engine internals (pistons, rods, injectors), a semi-closed deck, variable timing, a bigger turbo and a bigger intercooler, and several other knick-knacks. Sure, you can pump up the WRX and the STi to the same power levels, but in the long run the STi will fare better because the engine internals are stronger, and are designed for the increased power and the related stress.

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Old 02-07-2002, 10:16 AM   #4
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Quote:
Originally posted by Lovejoy
The difference between a WRX and an STi are more than just the turbo! You can't base it on what a vendor does to the car to get the same hp. The STi has a different engine internals (pistons, rods, injectors), a semi-closed deck, variable timing, a bigger turbo and a bigger intercooler, and several other knick-knacks. Sure, you can pump up the WRX and the STi to the same power levels, but in the long run the STi will fare better because the engine internals are stronger, and are designed for the increased power and the related stress.

Lovejoy
I know this all true for the JDM subaru, but does anyone have any info on the NON-JDM WRX STI motor/non AVCS?

There is no telling what watered down version we'll get. If you did the APS Sprint Spec kit to a JDM STI you would get numbers well over 320hp.
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Old 02-07-2002, 01:22 PM   #5
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Just to reiterate:

There is NO difference between a JDM STi ENGINE and a UK/AUS/EURO STi ENGINE. They are the same engine, have the same design, same components, AVCS, etc.

The difference lies in things like the ECU, and exhaust ONLY.

No major differences. The US Spec will probably have a different ECU and a different Exhuast with more Cat's- but that's it. I bet they bring us the "true" STi engine with it's semi-closed deck block, AVCS, the list goes on and on. Of course, that's not a fact yet, but based on some pretty good rumors I've heard from people I trust- and others that have connections with SOA- it seems pretty likely.

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Old 02-08-2002, 09:26 AM   #6
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Thanks for the info imprezawrxsti.com,

You just made my decisions between and STi and WRX Wagon of Death that much harder.
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Old 02-08-2002, 11:06 PM   #7
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i hope we get the "true" sti motor...not like our us wrx knock off motor without AVCS!
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Old 02-09-2002, 12:52 PM   #8
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Default AVCS

No WRX anywhere has the AVCS yet. At the moment it is limited to the STi. The US Sti will also have AVCS as it's primary use is for emmisions control and has not been put to serious use with regards to power output.
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Old 02-11-2002, 12:46 PM   #9
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Quote:
Originally posted by Lovejoy
and several other knick-knacks.
Like a 6 speed close ratio gearbox

http://www.subaru.co.uk/sti/specs.htm
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Old 02-11-2002, 01:58 PM   #10
Jon [in CT]
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Default Re: AVCS

Quote:
Originally posted by Bullet
No WRX anywhere has the AVCS yet. At the moment it is limited to the STi. The US Sti will also have AVCS as it's primary use is for emmisions control and has not been put to serious use with regards to power output.
Hmm. The JDM WRXes, including the non-turbo, all have AVCS and maybe AVCS accounts for some of the 20 extra hp and 29 extra ft-lbs of torque produced by the JDM WRX.
http://www.subaru.co.jp/impreza/wrx/...ism/index.html
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Old 02-11-2002, 02:51 PM   #11
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Sick 'em Jon!
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Old 02-11-2002, 05:59 PM   #12
Bullet
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Default AVCS

Jon :

You're right. What I should have said was Outside of Japan.
But as you see I said "YET". I seems that "yet" didn't last long as the new WRX's have AVCS. Hopefully they will make their way to us soon.

Thanks for the link.

I read on a sight somewhere that this is the first time that AVCS system is being used on a turbo motor. They say that Subaru have used the system mainly for smoother power through the range as well as improving fuel consumption and emissions and not for straight power gains. They did however say that it would not take much to extract benefits with some tuning mods to take advantage from avcs but most of the gain will be in the high rev range.

Last edited by Bullet; 02-11-2002 at 06:15 PM.
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Old 02-12-2002, 03:42 AM   #13
pio!pio!
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Default Re: Re: AVCS

Quote:
Originally posted by Jon [in CT]
Hmm. The JDM WRXes, including the non-turbo, all have AVCS and maybe AVCS accounts for some of the 20 extra hp and 29 extra ft-lbs of torque produced by the JDM WRX.
http://www.subaru.co.jp/impreza/wrx/...ism/index.html
Not ALL JDM WRX has AVCS, the NB-R version or whatever has it
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Old 02-12-2002, 01:28 PM   #14
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Well, according to the page I referenced, both the NB and the NA versions of the WRX have AVCS. What other non-STi versions of the WRX are there in Japan?
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