Hi people newbie to the forum here, have finally bought a proper Scooby (owned a classic 1.6 as an 18 YO).
I have come across from saab and mx5 forums to the dark side.
I have an 04 wrx wagon. Mods are miltek exhaust, sti uppipe/sports cat dp. Snorkus delete. Been road remapped by slowboy racing and supposedly about 270bhp.
So been having a few issues with smoke. Have taken the car to engine tuner as Alan is not far from me and have known about his place/knowledge for a while.
My turbo has gone so I am upgrading to a td04 stage 2 hybrid supplied and fitted by engine tuner.
Been advised to upgrade to sti tmic, pink injectors and walbro. I agree BUT as I want to run a safe amount of power 320/330, I need to ask what power can my stock tmic, fuel pump and injectors handle.
Alan suggests the standard parts run out of puff at about 290.
Have searched a fair bit and most reckon can get 350 bhp from standard wrx parts but that is pushing it. Obviously he is the man in the know and I know he wants the best performance out of the car but can the stock parts handle 320/330bhp after a remap.
the cost is adding up already. I can upgrade the parts as I go but rather than running 1 bar with current mods.

 

Geddon! I see you've done a good bit of research.

I upgraded my wagon last year, with a VF35, up and downpipe, STI TMIC, pink injectors, panel filter and of course a remap.

I was told that if you're going for 320-330ish, the bigger TMIC isn't essential, but the injectors and fuel pump are (and should only cost you ~£150ish). If you're doing the work yourself, it doesn't matter whether you add the TMIC later, but I wanted to do it all in one go rather than come back later to fit one. If you get the bigger TMIC, you'd be wise to get the undertray and scoop to go with it - I had a bit of trouble finding a scoop in my colour but if yours is WR Blue you should find it easier.

 

Thanks for the reply.
I think you may be right. After joining this forum the wealth of knowledge was unleashed on me .

I was just trying to save a couple quid but seeming that injectors are about 100, walbro 60 and tmic 150 it' not to bad. Will probably have a go myself as not to bad with a spanner having worked on mx5s etc.
I did read that most recommed the underscoop for the sti tmic but didn't realise I may should do the hood scoop aswell.
I know it is a bit bigger but wouldn't of thought it would make a massive difference.
This car is costing me a small fortune already.
power comes at a price I suppose. Just used to the cheapness of the mx5 and saab.

 

The STI undertray sticks up higher within the scoop, so it doesn't fit under a WRX scoop (I know, I tried it while searching for a bigger scoop in my colour!). Without the STI undertray, the air coming in from the WRX scoop doesn't reach all of the bigger intercooler, but it's unlikely to cause major issues or limit the performance that much. Can also be added later without needing a remap, I'd say.
Yep, the price of power gets bigger exponentially, the more you want! My car had PPP when I got it, and it seemed enough, so I spent the first couple of years upgrading suspension, brakes and handling bits. Then I found myself on the Hangar Straight at Silverstone wanting more ooomph

 

Which hybrid TD04 are you going for. I was thinking of getting the parts from ARD and having it rebuilt and balanced while I have an engine rebuild some time next year when I have saved my pennies.

would be good to hear how your hybrid TD04 goes, not too much feedback on them but what I have read is good.

 

if you want to keep the WRX scoop, you can remove the WRX scoop part of the tray and fit it to the STI underside of the tray. I did this myself many years ago, and it worked well.

i seem to recall i just used a set of metal cutting shears, a drill and some rivets to fit it all together, and it gave me a "stealth" installation of an STI tmic, whilst still retaining the bigger underside of the STI tray.

 

Hi and welcome to the money pit forum for more bhp......

*costs are adding up" & "trying to save a couple of quid" made me
chuckle

5 speed box is the next weak link as power creeps up, good for 350 bhp if you are light on the throttle

Had a SAAB 900 Turbo 16s, years ago caught a few people out with it, loved it!

Mate had a white carlsson, very little could touch it,he used to "play" with a porsche on the way in to work.
Porsche driver came in to garage one day to look it over, could not believe that he had paid £30,000 for the porky, and was getting blown away by an "old SAAB"

 

Thanks for the replies.
unsure of what make or who is building the td04 hybrid. It is being sourced and fitted via enginetuner. I have a choice of two hybrid td04s the stage 1 or 2. I believe the difference is a ported and polished inlet but could be wrong. I went stage 2 as it' a new turbo anyway so might aswell get the top spec for the extra bit of money.

I have a td05 with the correct housing for the impreza but have read it is a bit laggy but dies produce more top end. I am after a safer usable power delivery for the Cornish roads. Will put it up for sale soon to get some pennies back.

I was supposed to buy a 93 wagon 2.8 v6 before the wrx but it was purchased before I had sold my other cars.

I have decided to go the whole hog and get sti injectors and intercooler. I will get an undertray and scoop at a later date and just mod my underscoop for time being. Will also add a walbro then get a remap and let you all know. That will be me sorted,
until I sell and buy an sti saloon as the wife now has the big family car.

I have nearly spent the price I paid for the whole car already ha ha. The wife is not best pleased, although I did let her have a drive before and she loved it so I am just about getting away with it.

 

You want something as lag-free as possible, so that you can make a quick decision when those little overtaking spots appear between the bends.

Mine refuses to drive the wagon, and just rolls her eyes and tuts, so you're doing OK! Best thing is my kids keep asking me to go faster

 

She was against me getting a boy racer loud car but after she went on a supercar experience day a few weeks ago she wanted to have a go. She said it feels just as fast as those cars, probably because you are not allowed to fully open them up. I wanted her to go in the Ariel atom but she wouldnt. Tbh it was all men queuing for that car.

After doing a bit more research 330 may be optimistic but should make 310 maybe 320.

 

The TD05 is not laggy at all. It does have a higher boost threshold than the piddly td04, though, but I'm assuming you've got a gearbox...

 

Henrik you are correct, I am trying to gain a safe usable power. The gearbox is good for 350? Just do not want to push this thing to far, Its my daily.

got a feeling I will sell up and get an sti soon anyway then go for a bit more POWER. I did check my mpg the other day and it was 14.8

Had a call off of Alan today and he said my turbo was shot oil everywhere. Surprised it was still going. Could this of been affecting my mpg a tad. It felt like it ran well but as this is my first Scooby it' hard to know.

 

I've got an 02 and 05 PPP WRX wagon and they both do 28mpg on mixed runs.

If you are going to buy an STi anyway, I wouldn't bother wasting any money on your WRX. Stock TD04's can be rebuilt for a few quid in parts or bought second hand for £50.

 

If you're thinking of selling up, I would personally not spend any money modifying the WRX - just as per Technoplug, fix it and keep using it as is until you're ready to move to an STI.
The box would probably be fine etc, but in effect it would be money down the drain IMO (and I say that as a "reasonably modified" WRX owner - should have started with an myself, really).

 

If you get an STI, you won't have a wagon – STI wagons were only available in Japan in bugeye form, and are very rare/expensive over here.

14mpg is terrible, there must be something wrong. My long term average on standard PPP setup was about 27–28 mpg.

Upgrading to STI spec in various places is the only realistic way to get more than about 280 bhp in a wagon. You'd probably need to budget about £1000–1500 to gather the bits and get it all fitted and remapped. I did that and it's brilliant!

 

I did indeed need a new turbo. Engineer tuner carries out an oil change and they called me to say plumes of smoke out the back. Checked turbo and oil everywhere. Rear seal had gone and he said the fresh oil must have been able to bypass the seal better.

anyway a td04 hybrid stage 2 has been fitted. I have managed to acquire sti injectors for 75, sti intercooler for 130 and walbro for 35 all on there way, so not bad really. I know I need the undertray and scoop to fully make it work so will get one when I can.

I am having to keep my car below 15 psi at the moment as not yet mapped properly. I can feel iris fast though.

spoke to Martin at engine tuner and he said he would get 330 bhp with those mods. Alan originally said 310 but I guess Martin is the mapper.

should get it in end of week or next week and will post results.

This car owes me some money now, so it better be bloody good fun.

 

It's probably best to manage your expectations.


I started off on a similar approach on my WRX PPP wagon: EngineTuner 2.1, Cosworth air filter, AF04H hybrid turbo, walbro, STi injectors. It already had the Prodrive downpipe and decat centre section.


Still only managed 295bhp. I was gutted obviously.


She spooled very quickly, produced tons of early torque but ran out puff vey quickly.


The truth is there's no cheap way to power. I've tried it.


Having said that, mine was with an Andy Forrest TD04 hybrid. I'd be interest to see what a TD04 'stage 2' hybrid produces. Best of luck, though.

 

5 bhp away from the elusive 300 Mark.

The guys at engine tuner both said over 300.
310 by Alan and 330 by Martin. I was told it was already running about 270, so another 40 minimum should make it a beaut to drive.

Going to fit the intercooler and fuel pump myself but may get them to do the injectors as it seems like a pain to do. I also need another oil change as it's a new turbo. Fantastic more money.

how long do injectors take to fit by a specialist?

Also what picture hosting site are people using now after photobucket started charging?

 

Here are the results for those in this thread that may want to know.
I am very pleased with it. Martyn said it drives really well.
it pulls very hard in 3rd and had added a real raspy note when driving if that is possible.

 

Numbers look nice, but from the dyno chart it looks like boost treshold is quite high (200lbft at 3800rpm?). How does it look on road? On what rpm engine starts pulling.or on what rpm do you see 1 bar of boost when driving on road?
AlsoI assume that these are numbers at the engine?

 

You're confusing HP line with Torque line.

 

Yeah you're right. But my mistake was only in reading values. So, the torque: 130@2500, 200@3300rpm and 300(full boost?)@3900 - this is still quite late. I wonder how does it translates to drivability.

 

Any update on how the new turbo is performing as a daily drive?

 

Did you find out who built the TD04 hybrid?
How are you finding it now you have had it for a while?

 

Craig Bellworthy central turbo's built mine 19t billet wheel and ported