Basically, I have a 2002 Prodrive STi (bugeye). I am looking at running the car for track primarily, but with some road use.

So far I have collected:
18" with Toyo R888s
BC coilovers
Performance friction brake setup
660cc injectors
Walbro 255 fuel pump

Looking to get:
Turbo
FMIC
Fuel pressure regulator
Induction kit - out of the engine bay, inside the wing

Looking to run about 380-400bhp for now. I know the engine might not last so, expecting to have to rebuild that. Which will be either forged or a 2.1l kit.

Turbo wise....

Is it worth buying 1 turbo to try and fulfil both stages
Should I just get 1 turbo now and then change when the engine gets built? Which turbo(s) would you suggest for each stage?

 

Buy a S206, i've got one on my 04 sti, runs sweet as a nut with awesome power, these engines are very very strong!

 

Just buy the one and map to suit the mods at each stage

MD 321H or one of enginetuners would be my choice

http://lateralperformance.co.uk/sect...impreza_turbos

Shaun

 

double post

 

Did look at this one... still waiting for a response

Would the H be good enough? I would have thought that the T would have been a better choice?

 

Graham,

I was looking into this and went for a T on my car. Was hoping for the odd track day but that hasn't happen yet.

The H is a great faster spooling Turbo over the T.

If your looking for 380-400bhp a H will be fine. If you want that little bit more a T will be jsut as good.
I'd be tempted to get a 3 port solenoid if going for a H or a T to help the boost.

Depending on how aggressive you want to use the car can't see the point in chaning the engine parts just yet.

I'm hoping to get a track legal Exhaust system fitted soon and take mine on a few track days. This is my current spec of the car and is used everyday but gives you some idea on power levels etc required.
I am also going Performance friction brake setup route soon.

Engine/Drivetrain Modifications:
HDi FMIC (Harvey Smith MBE) with CAIK
Green Cone Filter with the above
Zero Sports Thermostat
MD321T
Lateral Performance tubular headers and up-pipe wrapped
840cc injectors
Fuelab reg (micro 2 port)
Parallel Rails
RCM Team ICE system with NON RES CENTRE
RCM Sports CAT
DV Delete
Catch Can
Coolant T/body - Manifold delete
Lateral Performance
Manifold Thernal Spacers
RCM Extended bolts
Lateral Performance Turbo intake pipe
Helix 240mm uprated single clutch (Organic)

Simtek ECU remapped By JollyGreenMonster
Anti Lag
Launch Control
MAP Switch to 95/97ron or V -Power + Meth

255 Walbro pump
3 Port Boost Solenoid
V-POWER with 5ltrs of Meth
Silkolene PRO S 10w/50 Engine oil
TEIN Bonnet lifters
Grp N short shift
Hardrace Uprated:
*Engine mounts
*Gearbox mounts
*Stabilizer

453.0 bhp & 386 lbft *


* at Surrey Rolling Road
Suspension Modifications:
AST Coilovers 30/50 **
Whiteline ARB 3 way rear/front (24mm(r) / 22mm(f) **
Whiteline Rear solid droplinks **
Whiteline ALK **
Whiteline Steering rack bushes
STi upper strut brace

** = part of the Powerstation Stage 3 - T25 Spec Kit


Wheels/Tires Modifications:
ROTA GRA's
YOKOHAMA Parada Spc 2 225/40/18

BRAKES:
Brembo Sports discs drilled all round
EBC Yellow Stuff pads all round
Braided hoses all round
AP Racing 5.1 Brake fluid

I did a project thread and have tried to add step by step with the mods that I carried out with power results. Hope this helps? https://www.scoobynet.com/projects-4...e-marmite.html

Steve

 

Thats brilliant, thanks! Brilliant spec you have there... will go read the project thread as well.

Its pretty much where I want to be

How do you find the car? My other half is already looking at her mini convertible so, impreza is definitely for the track... are you running on the standard STi engine? If so, I may pushing my power level a little more on the standard engine, which means the 1 turbo approach would be a much better idea.

 

Hi Graham,

Thanks as you will see from the project thread it has taken time to get it where I want it.

I took in some advice from members off of here & Surreyscoobies and the likes of TFS Racing,GRD & JollyGreenMonster with regards the choice of Turbo. In the real world unless you can afford to throw loads and loads of money at the car you need to make the choice of turbo with your goals in mind.

I am still on the standard EJ207 engine that the 2002 STi comes with.
The MD321T turbo is best suited to the 2.35-2.5 engine but again as per the above folks I went ahead with it on the 2.0 engine and it works a treat with the AVCS. Some people say it's laggy even on the 2.0t AVCS STi heads etc but in no shape or form is it laggy, later spool yes but not laggy.
The 3 port boost solenoid does help may I add.

In terms of driving I find it great to drive. But each to there own. I've had a few other fellow Impreza owners have driven it and all but 1 of them agreed the set up it great for the size turbo and the mods I have added are spot on. My mapper Simon (JollyGreenMonster) has set the map up for how I use it so I'd suggest if you did take this route get the mapper to set it up for how YOU WANT IT.
I cannot fault Simon hence why I have been using him for a few years now.

I found going from EcuTek to Simtek the biggest change of all. So much nicer to drive on a live map ECU.

Have a read of the thread I did and your understand what the difference changing bits and bobs make. That was one of the reasons why I did it not only to prove the engine will take it but to give and honest account of the power step by step will make on the rollers.

You could take the route and add the same mods and get better or worse results. But thats the way the cookie crumbles matey. Teh main factor is IT IS YOUR CAR AND HOW IT FEELS TO YOU.

Steve

 

A H is capable of 2 bar of boost.... that on a 2.1 was my plan till I came across a BIGGER turbo...

LOL

dunx

 

MD321H is a great turbo and i made 411bhp 376lbs/ft on v-power at 1.6bar

Was told the T was not suited to a 2.0 but changed any way and with 10% meth there wasnt much difference in spool

It made 452bhp 410lbs/ft at 1.6bar and made full boost about 3800rpm... but yours should be faster with the better heads

 

Totally agree Dunx. The H is a good turbo mate and have seen them make over 400bhp.

Steve

 

Fine example as per above Angus dear boy.

Angus will agree that on both of us with a MD321 T how much mine spools on a 2lt AVCS engine works well when we have been in convoy etc.

With the 2.5 engine it catches up in the end but the T on a 2.0lt works a treat.

Steve

 

Thanks for the advise guys - very much appreciated. You will very soon be seeing my project thread definitely decided 1 turbo purchase is enough

Last few pieces then it all goes on, can't wait!!!

 

Cannot believe I missed your response above. A lot will come down to driving style and how the car is setup. I have been speaking to simon and will definitely be called when it's time to map the car. I am more than likely going to stick with the standard ecu for now and switch later.

Really good to see that the sti engine is not ad fragile as some people say.

If you are in Surrey I should see you around!! I'm just outside of redhill

 

Graham,

Feel free to join here mate http://www.surreyscoobies.co.uk/forums/

As per above mate. The EcuTek flash is very good . (Know someone who is selling one too lol) . Personally I found I needed the Simtek not only becuase running DV delete was toying with my MAF sending to ECU but because I wanted ALS,Launch Control and Switches. These can both be done via the EcuTek software but your need to speak to Simon or the mapper of choice.

It's a dog eat dog world Graham mate. As above you could do the same and make more or less power etc or have problems. Each car is different.
My moto is look after a car and it will look after you.

Join up on Surrey mate.

Steve

 

Im just near Croydon and drive through Redhill quite a bit at weekends

 

unbelievable.... I hardly ever see imprezas

 

Graham,

Once you meet Anger your wonder why you suggested such a thing.

He's ugly, smells funny (a few pee stains etc) and has a horrible looking car. Oh he likes to set off his Anti Lag at poor people walking down the street.

Steve

 

sounds like all other impreza drivers...

 

Graham, if you want the car primarily for track work then sell the one you have before you spend any more cash and get a Spec C, its designed for this with the engine and transmission oil coolers, quicker rack, more responsive twin scroll turbo (360bhp on one of these is pretty much the same as 400bhp on the car you have), plus you have the added benefit of uprated suspension/geometry for better handling and all the goodies (like the anti surge fuel pump) that you dont get on the normal car (and A-DCCD which is fun on the track )
There is an MY05 Spec C on ebay for 11.5k, its a bit "blinged" up but may suit your needs rather than throw a shed load of cash at your car (though it is in Northern Ireland).

Tony

 

I didn't mention skip marks though?

Steve

 

Mr Burns,

That's dirty talk.

See your point but if you have few bob you can be-spoke your car to a spec you want?

I'd love STi Spec C RA but at the time didn't have the money. I don't regret doing my car just the time I spent away from the kids doing it.

Steve

 

Now that's just wrong!!

It's a nice idea and I would love to have a spec C. But quite honestly I don't see the value in spec C for my purpose. To have to sell my car and then go find a spec C is a lot of time and money!! Personally I prefer the bug to the blob and a hawk spec c is just silly money. I could also see a lot of the "extras" on spec c being removed, so a bit of a waste.

With spending 5-6k on my car (total budget, roundabout) I will have. Coilovers, uprated braking, 450bhp (detuned to 410-420 for safety).

I did look at that option before hand but decided it was not worthwhile for me....