Gents.

What's involved in the Powerstation upgrade for the JDM's? Copied this from their website:

JDM Subaru Impreza Twin-Scroll
Stage 2: EcuTek Re-Map, Milltek Exhaust, K&N Filter
~340bhp - £1400 + VAT
Stage 4: Please Call for 360+bhp

I'd like to go for the 360+bhp upgrade however I'd like to get it done myself rather than go through Powerstation ie buy the bits myself, get them put on then get one of the remap fellas from here to do that bit. Too difficult (spell?) or should it be OK?

TX.

 

Where do you want to go?
You could go full decat and have the car remapped, would save a bit on the "sports cat" but even with that you will only be down 1 or maybe 2 bhp on a full decat.

Tony

 

Me again
My car is coming from Litchfields and as part of the package price it gets re-mapped for uk fuel giving 315ish. I can have the milltek exhaust n cat fitted pre-map which I'm told will give 340-350 bhp depending on the individual car. Not sure how you get above this. You bringing this over yourself TX?

 

Not myself, I'm getting some help from a forum member ... mentioning no names at the moment
















Juggers!!

TX.

 

Tony.

Any idea how they get to 360bhp+ ?

TX.

 

mine got remaped @ powerstation

with 355bhp & 350lb/ft

thats with a Cheap induction kit, and a Cra@p exhaust

NOW got Geniune Proper 3'' HKS Turbo back, BLITZ LM Cover with LM FIlter

and due for another map which i am sure will go past 360/360 and it drives alot better now, pulls much stronger

 

How does the remap at PS compare to say a Bob Rawle remap? Would BR be better & if so by how much?

TX.

 

Mine was mapped at powerstation and gave last time it was on the rollers 344bhp but more important gave me 361Lbs of torque which I belive is more important,I belive the twin scroll vf36 starts to run out of puff round about 380bhp I have been intouch with a certain well known mapper off here who is looking at a turbo upgrade to take it too 400/400 even tho at the power it is at now is a good package.

 

'Please call' to me means engine rebuild with Cosworth parts.....

PowerStation

 

Bob got a special software which can map JDM STI's Boost in Each/different gears. which will make alot of difference!!

i was going to get bob to map my car but he wasnt avilable at that moment #

355/350 might not sound much.. but its a already a very quick car from A-B!! there is not much difference with 355bhp and 400bhp on the road, unless its in a stright line

hope this helps
kev

 

Thanks Kev & the other posters.

Which Milltek to choose though?

Performance exhaust products for the Subaru Impreza STI Spec C (Twin-Scroll Turbo)

TX.

 

Oh & can you get the exhuast done, then wait a while for Bob to be available? Or is it best to wait for Bob to become available & then book exhaust in for same time?

 

Holy cow! Serious money to get over 360bhp then ...

TX.

 

Gussy can you share more info with us plz as i am very interested and TX by the sounds of it.

 

Dunno TX. Have a look at Andy Forrest's site. If I'm reading right then you can expect over 360 on standard internals How fast do you want it to be

 

As fast as I can get it ... without spending £11k on a cosworth engine

TX.

 

Have you read webbies info on new age tuning?
You definately wont need 11k but an uprated turbo will probably set you back 2k and 400bhp is well within sight then

Tony

 

Cheers Tony, I'll take a gander ... be back next week once I've read it all

TX.

 

Interesting that Andy Forrest quotes 450bhp for standard internals, whereas Prodrive quote less than 350 for it to be reliable....

This has been commented on countless times, but it is a 'large' difference in opinions. And if the internals where that good, why were both Type 25 engines uprated?

Edited: For 2.5l engines, though AF still quotes over 400 for standard 2.0l internals

 

This thread might be of interest

https://www.scoobynet.com/projects-4...phase-2-a.html

 

The 2ltr JDM STi has stronger pistons than the 2.5 and are definately good for over 400bhp

Tony

 

Juggers/tx it was Andy I was talking with Last week about an upgrade for the twinscroll vf36,he was looking into it for me i will ring him later this week to find out the crack when I was last up there he showed me a twinscroll which had been used hard on track and the internals were to say seen better days as for shauns developments I have pm'd a few times and he was supposed to be publishing the results last month.

 

Powerstation do a 400bhp conversion which retains the standard engine internals and uses a T25 twinscroll turbo.

Give them a call for more details

Regards

Iain

 

I spoke to Ian a few weeks back about how their quoted Miltek/remap is 340/350bhp, but their Type20 car used on TimeAttack was 380BHP and how did they get that power

He was saying that all they did was use a much more aggressive map which will lower the life of the engine but that there was very little real gain in performance. They won't do it unless the owner expressly wants it and is aware of the potential consequences.

Needless to say, I'm sticking with the 340/350 as I want this car to last

To take it over 400 I'd suspect the addition of a different turbo and possibly injectors too.

The Cosworth engine rebuild is for when you want to go to 450-500+bhp, but I'm sure their are other alternatives to the Cosworth build on the market for that kind of power.

 

Beat me to it

 

Your not doing him any favours there he has that car for sale in his stocklist

 

I was talking about the PowerStation Cosworth conversion, not the race car that won TimeAttack and is now for sale (which was >600bhp btw)

Powerstation is one of may tuners out there. It's not a closed market
If the cost of the Cosworth upgrade is too much then I'm sure there are 'alternative' ways to get over 450bhp

But if i had the dollar I'd be at Powerstations door in a flash

 

You said type20 i thought the powerstation car was a type 25

My bad

 

Type20 = 340-350
Type25 = 415

Type20 @ timeattack = 380
Type25 @ timeattack = 600+

AFAIK, Timeattack pushed the upper power limits of both cars within their class regulations

The Type25 racecar was for sale according to the TimeAttack report, but I can't see it in the stocklist
I can't see any Type20's in the used stocklist either unless you count the 1 GP edition which has the Type20 bits +other trick bits like the Porsche brakes

Although he does have a white RA like yours.....
I do like 'em in white

 

You won't get 400 bhp from the std turbo but with some careful changes to actuator, induction, exhaust, and engine management you can get a reliable 375/375 from the std engine, I had 384/379 from my Sti9 before I sold with it running at a marginaly lower set of figures. It has to be mapped to suit the mods using fuel at the level of V Power or Tesco 99. Given a turbo improvement than 400 is a comfortable target. I have GC8 cars (several) running at that power level on std internals with associated mods plus a couple of WR1's and at least one "normal" UK Sti.

email as per profile for more info


Bob