I have an MY03 WRX with decat uppipe, sportscat downpipe, decat centre, sports backbox, uprated fuel pump, EcuTek 3 remap.
What i want to know is, what can i start on next? lol.
1) If i were to uprate the injectors then remap would this alone give me more output?
2) Or do i have to couple this with a new turbo to really gain?
3) Would my poxy WRX gearbox/clutch take this extra torque?
4) In your own opinions, is it worth it on "just" my WRX?
All ideas/opinions please, i would appreciate.
No real budget, but obviously it has to be sensible, no 2.5 upgrades here!
And chavs need not bother me with neons/silly hats

 

MaDaSS,

IMHO, no need to think about injectors until you are ready to change your turbo.

Think about uprating the intercooler, turbo and injectors all at the same time. This will mean only one remap.

The gearbox and clutch should hold out at this level of mods without any problems.

IMHO, Yes its worth it !!!!!!!!

Martin (MY01 WRX 368bhp)

 

Yep....... got to agree with Ninybobs above. Turbo and intercooler next step as injectors can max out (just)..........

Ninnybobs and me went for TD05 turbo and STi intercooler which I still feel gives the best bang per buck.......... Andy F sorted a local bugeye WRX with this combination recently

but there's lots of VF35 turbo's about at the moment

Midlife.....

 

Cheers I will have to have words with said man!

 

368bhp and still on standard g/box & clutch? What torque? I know "common wisdom" (that may be an oxymoron!) seems to think that the box gets unreliable come 320-330lbft. However, I'll be entirely happy if you're proving common wisdom wrong!

 

Agree both with Midlife/Ninnybobs..I went down the same route using there car mods as the basis for my own..just do it then enjoy injectors/turbo/headers and away you go.

 

Hades,

NO problems with gearbox (yet). Torque is at 331 lb/ft.

Gearbox and clutch has done many RWYB days with over 100 1/4 mile launches giving best 12.85 seconds. Car does 0-60mph in 4.6 seconds.

Hopefully, the bugeye gearbox is stronger than everyone thought.

Martin

 

I hope so guys

Andy

 

Madass, what bhp are you getting from it at the moment as I'm after doing the same to mine next month.....

 

Taff107, mine at the moment is 270 bhp with 265 ib/ft, although i do remember when i had it on the rolling road, i was told by them it was a very "safe" re-map of the fuelling side. Which means it is running a little richer at higher revs than perhaps some mapping experts would maybe do, so that costs you a little power, but how much i do not know.
It all depends on everything you use really and who maps the engine and how.
Tbh, i was pissed off with my results, i could have got the same from the PPP and saved a lot of money, but thats another story.
EDIT: I forgot to mention, it ended up being mapped at just over 1.2 Bar.
And it definitely pulls like f**k. There is a big difference in 3rd gear pulling power than before, to me, before the car just dies as you get higher up the revs in 3rd gear, now it just keeps on pulling. Like most on here, the low rev torque to me is pish, but once up the revs, just keep it there and you cant take the smile off my face! lol.

 

If you want more torque low down add a turbo inlet hose and uprated (say STI) TMIC with your current setup, yesterday I installed them in my old GT and it gained more than 250rpms in spool up and some extra horses without risk anything else, they both add in reliability.
I am planning to fit also the above parts in my WRX03 with PPP (decated) along with a Walbro 190lt/h fuel pump but I am not sure if my injectors max out, has anyone similar mods?
JIM

PS:By the way mine has 240+ ps/ 33,5+ Nm at the wheels according to Deltadash.

 

Hi Jim

With regard to maxing out the 380cc injectors on the 03 WRX, it depends on the AFR you are prepared to run.

The std car with no mods other than a decat and tek2 remap will max out the std injectors but this is at approx 10:1 AFR

Andy

 

What is AFR?
And i need more power! LOL

 

Sorry, it is the Air/Fuel ratio. Normally these cars run very rich ie <10:1 AFR It is possible to run them on a leaner ratio in certain areas but the ignition map must be set to compensate for the faster burn speed.
Rich AFR's are very safe but generally not as powerful as a leaner mixture. Finding the optimum settings (which will vary from car to car) can be the key to releasing the cars full power potential.

Andy

 

Yeah that sounds like my car then. Although it was supposedly an EcuTek 3 remap, there was no real time like that involved that i saw.
I was there on one of the mapping sessions. That explains to me why my car may not be running at its "best" then shall we say. Although it is very good, more is better! lol.
I wonder if i could gain from a remap then from someone else perhaps?
What would be a viable gain above the torque i get now?

 

You are correct Andy but as I have PPP ECU I don't know what AFR runs, my guess is they are very conservative.
I have max IDC 100-101,5% at high revs (above 5700rpms for a 350rpms range) where advance is about 20-21 and knock correction >+3.5, I am not expert but this leads me to believe I have safety margins for an STI I/C what do you think?
Of course our 100 RON fuel plays a huge rule as the very hot summer ambients do!
JIM

 

The Sti intercooler should 'buy' you more safety margin by keeping charge temperatures lower, the increased airflow (for the same boost) will require more fuel which you don't have but fitting the uprated pump should compensate for that.
Knock correction of 3.5 seems a bit low for a 03 but without access to the PPP maps then I can't really comment with any degree of certainty.

Andy

 

3.5 knock correction at this specific area Andy where IAM is >20-21, IDC <100-101.5 and EGT about 800C, usually I have more than 5 degrees knock correction which is normal for my MY.
JIM