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Old 14 Dec 2010, 05:43 PM   #1 (permalink)
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Where to go from here

Hello fellow Subaru addicts, I just registered a short while ago and wanted to get some advice on taking the next step on modding my 2000 Impreza GT. I thank you upfront for sharing the knowlege!

Currently the car is practically for track day use only since the tarmac in Rio de Janeiro isn't very suspension-friendly.

I have upgraded my suspension setup with Tein Flex coilovers, Whiteline '22 sways front and back, Whiteline links and a Whiteline Anti-lift+Caster Kit. I went with DBA rotors up front and Ferodo pads all around. Yokohama A048s complete the roadholding gear.
I strapped on a custom made 3' complete exhaust with no cat and went with a simple K&N panel filter. (I had problems with the MAF when trying 2 diferent cone filters, want to go for a different ECU and swap for a MAP).
Engine is mapped with a Unichip and boost peaks at 1.5kg.

I haven't tested what figures are like in a dyno yet (4x4 dynos aren't that easy to come by in Rio), but I expect power output to be somewhere around 230-260 hp with good quality petrol (Petrobras Podium).

The car is pretty well balanced and nimble, outright fun to thow around the track, but, I need more power if I want to go head to head with the WRXs, Evos and 911s I meet at the racetrack.

Hence, I go back to my title-question, where to go from here?!

My idea is to to boost hp to around 300 - 350 and the initial plan is:
Vipec ECU
VF34 Turbo
STi 500cc Injectors
Walbro 255hpl Fuel Pump
SAMCO Intercooler and Turbo hoses

Is this an adequate plan for my hp goal?

Any suggestions?

I wonder how badly I need a front mounted intercooler, I think I have other mods to priorize before this, and again, Brasil is VERY hot in the summer.

Hope to hear some ideas, I really apreciate the help!

Regards,
Luiz Lopes
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Old 15 Dec 2010, 08:20 PM   #2 (permalink)
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Re: Where to go from here

What kind turbo you have now?

If there is very hot so you certainly need front mount cooler.
And tunable ECU is good investment to.I am using linkecu G3.
Will upgrade to G4 :P
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Old 15 Dec 2010, 08:49 PM   #3 (permalink)
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Re: Where to go from here

Think your plan sounds good fella - nice choice of parts. Normally a fmic is for 350 plus but if it's very hot it may help.
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Old 17 Dec 2010, 11:29 AM   #4 (permalink)
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Re: Where to go from here

Thanks for the feedback!
I am running the standard turbo for the 2000 GT, not very sure what it is to say the truth. Haven't gotten my hands dirty with this car yet and just started my reading on it.
And after reading a bit, I am considering a SC36 or SC38 turbo, what are your thoughts on that?

VF34 vs SC36 vs SC38?

I am also considering buying a turbo, injectors and pump that would produce some 400+ hp. I am sure to upgrade internals and transmission eventually and don't want to buy everything again.

Should I go for a bigger turbo, etc and run it with 350 hp until internals and tranny are taken care of or that won't be very efficient compared to a setup suited for the 350hp intended just right now?

Any ideas on a 400+ setup?

Thanks again fellas
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Old 17 Dec 2010, 12:32 PM   #5 (permalink)
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Re: Where to go from here

im guesing gthe internals are similar spec to the wrx on the GT meaning that they are unlikley to survive 400 for very long, if at all.

400+ is rebuild teritory, so if you go down that route your looking at mega bucks.

for as you are now i'd sya sc36 billets about hte best you'll buy spool and top end. running in such hot climate i'd recomend a front mount intercool and afront mounted oil cooler.
also a set of gauges to make sure oil temps aren't going ape and prob a nocklink to make sure fuel is ok (im assuming fuel can be a bit ropey, but if not the case then not so critical)

As far as ecu never heard of Vipec, to me syvecs is the way to go if you can get hold of one, at that sort of power level and future plans. whos going to be doing your mapping? or are you flying a mapper over to do it? the right mapper is the difference between not only a good performing car but also a safe runnign car
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Old 17 Dec 2010, 03:39 PM   #6 (permalink)
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Re: Where to go from here

Ive been told the 2000 GT has the same engine as the bug eye, Im not sure, though.

I figured 400+ would be a different game, after all, there is no free lunch when it comes to reliable hp

SC36 it will be, Ive spoken to the guys at SC and it seems like a pretty sweet deal.

Have you tested or heard any info on SCs FMIC kit? What would you go for?

I have a turbo boost gauge, AFM and a pyrometer for the exhaust installed, going to look into the oil temp gauge and cooler. Not very sure about what ropey means but you got the message across, going to consider a knock sensor. The list goes on and on.

The Vipec unit was a suggestion of a friend that runs the meanest track Evo in Brasil. The truth is, we have the same tuner/mapper, and he knows the Vipec unit well. Kind of cuts back on what could go wrong. Hes very respected and the good thing is he always goes for reliability first. It would be nice though to have it mapped by a proven shop out in the UK where you have been running these cars for a long time but I'm pretty sure I would have to fly someone over here for the map to be any good. It would be a good deal if I could pay only for the trip or the map.

Thanks Tidgy!
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Old 18 Dec 2010, 09:29 AM   #7 (permalink)
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Re: Where to go from here

Quote:
Originally Posted by LuizLopes View Post

SC36 it will be, Ive spoken to the guys at SC and it seems like a pretty sweet deal.
Will you buy billet SC36? SC guys have hompepage?
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Old 19 Dec 2010, 01:27 PM   #8 (permalink)
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Re: Where to go from here

Quote:
Will you buy billet SC36? SC guys have hompepage?
Home page;

Scooby Clinic - Subaru Impreza tuning specialist

SC36;

Turbos / Engine Components for your Subaru Impreza
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Old 20 Dec 2010, 12:19 PM   #9 (permalink)
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Re: Where to go from here

got one of clinics front mounts on mine, all good.

from what i gather vipec is sold as link overhere.

as far as mapping, then alot of mapeprs will travel, if you can get a few folks who want it doing then you can normaly get a reasonable rate 1200 cost drops to 300 if you can get 4 of you, more and, well you get the idea lol

other thing is if you do get a mapper over you tend to increase your choice as far as ecu, eg if pat came over he could fit and map a syvecs for you.
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