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Old 07-31-2000, 05:34 PM   #1
Bugsie1
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Post How would I get the WRX up to 300HP?

So let's all assume that the WRX was available now in the USA, with 220HP and I just bought one. What I would really want to do is get the thing up to the Japanese Spec of 280-300HP.

What would I have to buy/change/upgrade and how much am I looking at?

I'm assuming that the UK guys (Jay??) know all about this scenario.
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Old 07-31-2000, 07:14 PM   #2
kelley nelson
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Lessee,

There will be a whole new world of goodies opened up now that Europe, Australia and North America will all get nearly identical engines.

Check out the dyno results some of the folks in the UK are getting with various modifications. Their cars are currently rated at 218hp.

http://dyno.scoobynet.co.uk

[This message has been edited by kelley nelson (edited July 31, 2000).]
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Old 07-31-2000, 07:38 PM   #3
Robin2
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Post

Easiest way is to add a Chip and change the exhaust system...

If you're really serious, upgrade the Turbo itself! But like Kelly said, take a look at the Scooby dyno runs...

The one real advantage is now we'll be on the same playing field as the rest of the scoobie world in the aftermarket world department...

Robin
National Capital Subaru Club www.ottawasubaru.com
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Old 07-31-2000, 07:47 PM   #4
RotrPwr
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Cool

Bugsie,
your prob looking at intake, downpipe, exhaust, ECU, and maybe a S-AFC. Price for all would prob be $1500-1800. But i think with the S-AFC you'd prob be just over 300hp, maybe around 315-318hp.

Darril
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Old 07-31-2000, 07:56 PM   #5
kelley nelson
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In Australia it sounds like they like swapping in the STi turbo units to replace the stock ones. Their WRX is 218hp as well.

I don't know what the improvements are like from this upgrade, but supposedly they bolt right up and the VF24 turbo (aka Grp. N turbo) will supposedly work well with the stock ECU.

I don't see this spoken about much in the UK for whatever reason.
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Old 07-31-2000, 08:11 PM   #6
blaster88
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Drop a 350 in it?

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Old 07-31-2000, 08:20 PM   #7
KooshDogg
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Post

bigger I/C, naturally theres always running more boost, and maybe some functional vents, hehe

what size/type turbine does the stock WRX use anyway?
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Old 07-31-2000, 09:08 PM   #8
N/A
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Don't forget the difference's in fuel between the US, Japan, UK, NZ and Australia. That might limit how much you can do. You could always do the 2.2L conversion to the EJ20. No matter what you do your warranty is history.
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Old 07-31-2000, 11:29 PM   #9
Shin RS
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Yeah, gotta watch the diff between octane ratings and the fuel that you use...

Heard from someone that australians were blowing up their engines cause of using the wrong fuel octane... Scary.../
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Old 08-01-2000, 06:22 AM   #10
ColinL
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Post

Our pump gas is quite good. Japan's is slightly better, but we have plenty of unleaded racing fuel available if someone wanted to go that route. ($3-10 per gallon plus, no thanks)

If you have Sunoco near you, their Super 94 is the best "regular" pump gas.
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Old 08-01-2000, 06:42 AM   #11
Retsyn
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You'll really have to be careful, the Japanese fuel is 110 - 115 octane. I think in Australia they were running 105 and the motors were still having problems. You'll have to get lots of cans of octane boost.

You could always weld it to mustang cobra

[This message has been edited by Retsyn (edited August 01, 2000).]
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Old 08-01-2000, 06:57 AM   #12
ColinL
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Have a Nice Day?

And the misinformation spreads...

The WRX STi are built for 101 RON, which is only one part of North America's (R+M)/2 method of determining octane. Sunoco 94 is reasonably close to 101 RON, and Phillips, VP Racing, etc. unleaded race gas is WAY above that.
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Old 08-01-2000, 10:32 AM   #13
KC
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00 Honda S2000

Post

In order for more power...(This is based on DSM's)

All in theory since we still don't know what kind of engine we're getting.

By the way...when I get it, i'm going to get the 1000 miles on the Turbo and I will be adding this to it:

2.5" or 3" Cat Back (10-15HP)
2.5" or 3" High-Flow Cat (7-10HP)
2.5" or 3" Downpipe/Headers (10-15HP)
K&N Cone Filter (5-15HP)
Boost Controller (Could be manueal ie Hallman or Electronic S-AFC)(15-25HP)
Plugs (1 Range Colder than Stock)(Protection more than HP)
8MM Plug Wires (No HP...again Protection)
In-Tank Fuel Pump Upgrade (No HP...again Protection)
Boost Gauge(No HP...again Protection)
New Clutch. (No HP...again Protection)

I really don't think a Chip is the way to go yet. We'll have to see.

The above should get you about 50-85 HP depending on how the new engine takes to the mods. Pretty close to 300 if it comes as 220 HP. If it's 240, then it's knocing on the 300 HP door.

Other things you may also want to look into for 300 HP...Stiffer Springs/Struts, Some Port Work if possible depending on the flow if someone could measure it, and maybe even a bigger turbo, and maybe a VPC if the HP gains aren't good enough yet. Then you can get into bigger injectors, external wastegate, larger intercooler, extrude honeing, lighened flywheel, blueprint and balance engine. And more.

--KC
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Old 08-01-2000, 10:39 AM   #14
JaiMak
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Post

Up here in toronto, one of the members here (vIII) is running an STI vIII engine on Sunoco super 94 without any problems, and he's tweaked his output to probably over 300hp.
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Old 08-01-2000, 10:44 AM   #15
Retsyn
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Sorry, I wasn't aware that there were different methods for rating octane. The article I read was from an Australian site.
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Old 08-01-2000, 10:57 AM   #16
Michael
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Post

upgrade the size of the stock turbo and put in a boost controller, intake, exhaust, header, and a apexi power fc. you should br over the 300 mark
michael
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Old 08-01-2000, 01:46 PM   #17
RotrPwr
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Wink

Yes, ColinL is correct. Sunoco 94 Ultra is very close to 101 Ron.
You can get a 55 gallon drum of VP C-14(114 octane) or C-16(116 octane) for around $250. It would prob fill your car up around 3.5-4.5 times, depending on how sparingly you use it. Gotta love the way VP smells when burnt though

Darril
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Old 08-01-2000, 02:15 PM   #18
N/A
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Post

Well also you will have to remember that your in CA and you must get past the emissions test and all the parts must have a CARB number. So that would eliminate any of the parts taht are already out there for the EJ20. None of them have a CARB number as of yet. They were designed the for the EJ20 which was never in the US. You will most likely have to wait a few months or maybe even a year for the companies to get their products past the CARB testing. After all they have to go through a gov agency. Not likely they'll get through in record time. Maybe by the end of next year it would be possible for you to reach that point and still be covered by the CARB rules.
I mentioned the octane difference because most people won't need to use the high quality gas. That's if they leave it stock. You'll probably need better gas if your seriously looking to get 300+hp from the 2.0L engine. You may be able to get by with the lower grade but its not something many people would want to risk. If the car doesn't come with it as standard I would install all the usual gauges and knock sensor to keep tabs on the engine.
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Old 08-01-2000, 10:01 PM   #19
Bugsie1
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Post

thanks for everyone's input - much appreciated. I'm sure this is something we'll cover again in the not too distant future.

Does anyone know exactly what the differences currently are between a Japanese 280HP Impreza and a UK 218HP Impreza Turbo? I know they basically have the same engine, so what are the real differences? I imagine that those differences will be mirrored between the US WRX and the Japanese WRX.

Also how about the differences between a WRX and a WRX STI - I believe they both quote 280HP but the STI has more Torque. So what do STI do to the standard WRX engine?
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Old 08-01-2000, 11:51 PM   #20
SecretAgentMan
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Cool

I've got a MY00 GT (218 hp).



The main diff lies in the ECU, turbo and internals.
It's quite hard to get the euro/US EJ20 up to 300, you'll have to chip it. Upping boost is a BIG BIIIIIG no-no, you must make sure that the engine get's the right fuel/air mixture.

Possum Link, Unichip or any other full map will do wonders, and keep it fairly safe.

I've got a full Scoobysport exhaust (no cats) setup on mine, and an ITG panel filter, and the car is fast enough for me (it kills M3's and lards-a$$ US barges ;-) ).

RGDS

/Jerry - Sweden
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Old 08-02-2000, 12:15 AM   #21
Cool Hand
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my Blitz NurspecR cat-back doesnt have a CARB#...does that mean i have to take it off before i move to california? that sucks
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Old 08-02-2000, 02:18 AM   #22
Jay_UK
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Cool

Hi guys..

Interesting thread

cya..

J.
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Old 08-02-2000, 02:31 AM   #23
MikeYOX
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Talking

I'll have you know that I drive a large U.S. barge, and they aren't as slow as you think. (well, at least not mine)
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Old 08-02-2000, 02:39 AM   #24
SecretAgentMan
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MY00 Impreza GT
Forged EJ205, 276 whp

Wink

In the real world the road has turns...generally speaking most US cars are more like a "near-death-experiences" when the road starts to get winding.

Nothing beats cui for straight speed though.



RGDS

Jerry - Sweden
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Old 08-02-2000, 03:29 AM   #25
rsquire
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Post

ColinL

Do you know if the USA 92 oct ( by ron + mon /2 ) is the same as the UK 97 oct.

Richard
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