Moar Powah!

[_dave_]

hi guys

right after owning my subaru for 5 minutes, i said i wouldnt modify it, as im getting married next year, but i just keep imagining more power from it!

Its a 2003 wrx with PPP roughly 261BHP

i want to get it to about 300bhp. wanted to know what were the best modifications and a rough estimate of how much it will cost me to get to that mark.

and once its at 300bhp, will i want more power? i bet

thanks to all who respond.

[emoe]

  _dave_ said:

and once its at 300bhp, will i want more power? i bet

Well, you are already on the right track with that!

With a PPP ECU you can go down the Apexi route, that will boost you a bit, or you can have one of the guys here remap the ecu for you.

Injectors, pump, exhaust headers ect ect are all the routes you will need to go down to get where youre heading.

If you end up wanting more power you will have to fit an FMIC as the top mount wont let you go much further.

Now if youre going to want to go more, youll need to look into closed deck heads, twin scroll turbos, FMIC, 660 injectors and remapped to run all that. This isnt cheap!

If it was me, id wait till i wanted to go the whole hog, as the money you spend now to get an extra 20-30horse would be better used later to make 100 horse!!

Good luck!

[_dave_]

  emoe said:

Well, you are already on the right track with that!

With a PPP ECU you can go down the Apexi route, that will boost you a bit, or you can have one of the guys here remap the ecu for you.

Injectors, pump, exhaust headers ect ect are all the routes you will need to go down to get where youre heading.

If you end up wanting more power you will have to fit an FMIC as the top mount wont let you go much further.

Now if youre going to want to go more, youll need to look into closed deck heads, twin scroll turbos, FMIC, 660 injectors and remapped to run all that. This isnt cheap!

If it was me, id wait till i wanted to go the whole hog, as the money you spend now to get an extra 20-30horse would be better used later to make 100 horse!!

Good luck!

thankyou for your reply, as a rough estimate how much do you reckon the extra 100bhp would cost me? would it be better selling my car and buying a STI with PPP and then going from there? if i could sell mine for what i paid for it, could get a sti for 2-3k more.

Dave

Edited April 15, 2008 by _dave_

[emoe]

  _dave_ said:

thankyou for your reply, as a rough estimate how much do you reckon the extra 100bhp would cost me? would it be better selling my car and buying a STI with PPP and then going from there? if i could sell mine for what i paid for it, could get a sti for 2-3k more.

Dave

To be honest, youd loose out if you sold your car and started again.

Its better to start with what you have got.

It doesnt matter if you have 270Bhp or 217bhp, when you want to break over the 300 350 mark, it will cost the same mate!

As for cost to do all that, i coudnt say. The stuff for my cars comes from the Race teams i work with, so its discounted anyway.

As for others on here, im sure youd find differences in prices they paid even though they have very similar power outputs.

But to be sure i wouldnt expect too much change out of a good few grand!

[_dave_]

thanks again for your response, ill have to find out who can get me up into the 300s and of what parts and prices.. like a "package" price thing

[emoe]

  _dave_ said:

thanks again for your response, ill have to find out who can get me up into the 300s and of what parts and prices.. like a "package" price thing

Try Andy Forrest on here, ive heard loads of good reports of his gear!

[_dave_]

  emoe said:

Try Andy Forrest on here, ive heard loads of good reports of his gear!

thanks emoe youve been a great help

ill email him

[granby]

I've got a 2004 WRX and i'm upto 333bhp & 325 ft lbs, heres what i've done to mine

VF34 turbo

STi injectors

STi intercooler

Ported & Wrapped headers

Full decat

Uprated fuel pump

Remap by Bob Rawle

The standard turbo on a WRX (TD04) is good for around 280 bhp, to get any more you need to change it, a common swap is for a VF35 off a STi

Change the intercooler also for a STi item, these are good for around 400 bhp

WRX injectors may be OK but will be running near there full duty cycle so advisable to change them also for STi items

Ported & wrapped headers will make the turbo spool sooner and increase torque

Full decat not 100% necessary as you could go for a sports cat in the down-pipe but it costs more, also get rid of the cat in the up-pipe

Uprated fuel pump to be on the safe side

Remap absolutely necessary after all of the above (or even just some of it), Jolly Green Monster on here can advise you about that

Hope thats of some help

Ian

[_dave_]

  Granby said:

I've got a 2004 WRX and i'm upto 333bhp & 325 ft lbs, heres what i've done to mine

VF34 turbo

STi injectors

STi intercooler

Ported & Wrapped headers

Full decat

Uprated fuel pump

Remap by Bob Rawle

The standard turbo on a WRX (TD04) is good for around 280 bhp, to get any more you need to change it, a common swap is for a VF35 off a STi

Change the intercooler also for a STi item, these are good for around 400 bhp

WRX injectors may be OK but will be running near there full duty cycle so advisable to change them also for STi items

Ported & wrapped headers will make the turbo spool sooner and increase torque

Full decat not 100% necessary as you could go for a sports cat in the down-pipe but it costs more, also get rid of the cat in the up-pipe

Uprated fuel pump to be on the safe side

Remap absolutely necessary after all of the above (or even just some of it), Jolly Green Monster on here can advise you about that

Hope thats of some help

Ian

hi ian

333bhp, good stuff! doing well.

what kind of moneys have you spent to get the car up to that stage if you dont mind me asking. Id like to be able to collect the parts as i go along and then get a remap, with them all fitted. is this similar to what you did or did you get a package fitted by a company. also with the full decat how do you get it through the MOT!

Dave

[granby]

  _dave_ said:

hi ian

333bhp, good stuff! doing well.

what kind of moneys have you spent to get the car up to that stage if you dont mind me asking. Id like to be able to collect the parts as i go along and then get a remap, with them all fitted. is this similar to what you did or did you get a package fitted by a company. also with the full decat how do you get it through the MOT!

Dave

Suppose your looking at about £2500 - £3000 if you get everything new, i'd look in the for sale sections on here & scoobynet as you can normally get some bargains so you may save quite a bit, i did some research and worked out what i needed and got the bits but i did it in stages which cost me more as i had to have a couple of remaps

MOT well it's a case of who you know not what you know

[emoe]

  Granby said:

Suppose your looking at about £2500 - £3000 if you get everything new, i'd look in the for sale sections on here & scoobynet as you can normally get some bargains so you may save quite a bit, i did some research and worked out what i needed and got the bits but i did it in stages which cost me more as i had to have a couple of remaps

MOT well it's a case of who you know not what you know

Yes bear in mind, ike granby says, you will have to remap after each upgrade if you do it in stages.

And i said in a post earlier, with mine i simply made a center cat to fit on a temp basis, mine just bolts up in place for MOT time

[mikkers]

If you keep to a 2.5" system then you can swap the centre cat in and it should pass. 2.5" is good for about 350bhp, and to be honest anymore than that and you will be budgeting for a new gearbox and possibly a 2.5 block after your one explodes.

Also take into account the logistics - when you decat the up pipe you may as well do the headers to cut down on labour and if you want them ported they will need to be sent off, so the car is off the road for about a week. Then when you have done all you want to do it will need mapping sharpish so you need to know when the mapper is able to do it and work around this and when you plan to get all the work done.

I have been looking for a vf34 for a while for mine and have just about given up, so now I have decided to get a turbo off Andy F, they are quality items and reasonable BUT for most turbos he does you will need to send yours back in exchange. He does do new ones but you will pay more for it and if you want the turbo before sending yours off a £200 deposit is payable.

Uprated fuel pumps are easy to get, about £80 new, so no problems there, and sti injectors come up for sale when sti owners want to upgrade, just keep an eye out. You can get them new, but obviously more expensive.

You wont need a front mount intercooler, an sti one if perfectly adequate, but if you get one secondhand bear in mind you will want the undertray and you will also need to replace the intercooler y pipe as yours will probably burst when its being mapped.

Good luck mate, you are doing what i plan to do, the financial side of it was looking reasonable untill i had to pay for a holiday to las vegas. And remember the money side is only part of it, a lot of time will need to be spent too. And if you manage to get a vf34 be prepared for me hunting you down.......

[mikkers]

Actually, forget the ic piping, I forgot you have PPP, so i believe yours already uprated.

[granby]

  Mikkers said:

Actually, forget the ic piping, I forgot you have PPP, so i believe yours already uprated.

STi intercoolers have different pipework

Edited April 15, 2008 by Granby

[_dave_]

brilliant thank you all for your replys. ill get saving for this and my wedding,. eeek!

Dave

[marky9074]

What Ian says is the simplest solution... most of that can be had on ebay or here / scabbynet as take offs. Cannot remember if WRX PPP has uprated fuel pump...

You do not need a FMIC until well over 400bhp

[darryl_martin]

  marky9074 said:

What Ian says is the simplest solution... most of that can be had on ebay or here / scabbynet as take offs. Cannot remember if WRX PPP has uprated fuel pump...

You do not need a FMIC until well over 400bhp

Don't think it has the uprated pump as I was advised to fit one to mine. Didn't go that far in the end, just prodrive downpipe (from the sti PPP) off ebay, and a new uppipe while they were at it. Don't know what the power went up to and I managed to get away without a remap for that one, but car definitely felt better.

[tony_cousins]

  marky9074 said:

What Ian says is the simplest solution... most of that can be had on ebay or here / scabbynet as take offs. Cannot remember if WRX PPP has uprated fuel pump...

You do not need a FMIC until well over 400bhp

No uprated fuel pump

Mines a wrx with ppp and all i did was

full decat

cold air induction

and then let the ecu which is self learning adjust

this then gave me 285bhp 286 ftlb torg proven on the rollers at power engineering

Made a nice fast car, but i think if remapped would have made 300 easily

[HOL]

I think that if you follow granby model of vf turbo and sti top mount with remap for 300.

Granby, can you rember if you hit 300 at that stage? And did you need bigger injectors before 300?

The sti top mount is only good to 380bhp on 2.0, unless you have some formof trick hybrid. At which point ithink you want bigger anyway.

If 300 is your limit, then I think subarus parts bin is the easiest.

Edited April 27, 2008 by HOL

[_dave_]

i would love more than 300, but money permits me at the moment, was good to get an idea on what parts i will need to get. what i will do is buy the parts as i go along then once ive got everything get the car remapped to suit them