SPIDERWRX

wrx newage blobeye

had before

vf34
full de-cat
uppipe
uprated fuel pump
remap

made 309bhp

then added

sti intercooler
sti injectors
remap tweak

made 311bhp

andy97

iTrader: (1)

The second items wont really give you any more power, just a margin for improvement with a bgger turbo

jasonius

iTrader: (1)

TBH mate what you've fitted is more of a safety margin. You will benefit from increased performance when hot or on prolonged hard runs..

Out of interest, did you also fit the STI scoop and under tray..? These are a must..!

At the end of the day peak figures mean nothing..

jasonius

iTrader: (1)

Doh, you beat me to it..

STI scoop and under tray..?

BTW who mapped it, seems quite low for the spec..?

SPIDERWRX

yes, fitted sti scoop & undertray too,

it does feel faster, & i am happy with it, & i will benefit from increased performance when hot or on prolonged hard runs
but i did think i would have been more.

but your right peak figures mean nothing.

mapped by a local big scooby place

RED2

does seem low, im having the same spec fitted and mapped in a couple of weeks and i was expecting a bit more than that, hope its worth it after what im spending

New_scooby_04

iTrader: (4)

How was the power figure measured?

All being well, I would expect power to be around 330-340bhp with that set up.

Ns04

Northern Nick

iTrader: (1)

I thinks its near the mark, some get more, some dont. My STi made 335hp on a slightly better spec, I wouldn't worry.

What was the torque output?

Your STi I/C should have made better torque allowing a bit more ignition mid range before det. Injectors, as said are a safe margin, 440's should be good for 310 anyway so fitting 500's is just preparing for future mods

Butty

iTrader: (2)

The addition of STi injectors over std WRX ones should have made a major difference to the remap.
The 309 hp figure looks good for that set up, but the upgrade should have seen IRO 330-340 HP.

How were the power figures measured?

Nick

steve_wr1

thats about right for a vf34 on a wrx.it will make slightly less than it would on an sti.i think its because the wrx hasn't got variable valve timing,i may be wrong.a friend has just had his wrx mapped with my old vf35 and sti pinks and hit around 320bhp,where as it was running 340bhp on my wr1

stevepulleyman

What difference was there in torque figures ?

i made a few changes to my own car, went for remap, did'nt gain hardly any bhp, but alot of torque was to be had.

its not all about bhp figures, its torque that gets you from A to B quicker.

steve_wr1

he got approx 325bhp and 319lb ft and on my mine they were running 340bhp and 322lb ft.similar torque but a little less bhp.althought mine had the prodrive sports cat at the time and his is decatted.both cars mapped by andy f.

Northern Nick

iTrader: (1)

People keep forgetting that its claimed by Subaru that 80% of the newage STi engine is uprated over the newage WRX, not just injectors, turbo and intercooler, thats got to count for something.

That hp figure ain't bad but as i said earlier, torque would be interesting to know.

F1 CJE UK

iTrader: (8)

Subaru say a lot of things most of IT is BS ...

SPIDERWRX

(How was the power figure measured?) = rolling road

torque output before 290 now 295

will post pic of before and after

SPIDERWRX

before



after

Butty

iTrader: (2)

Didn't SC say what the problem was?

Presumably boost was about 1.2 bar on both runs?

Adding pinkie injectors over std blue ones should have allowed boost to be increased to 1.4 bar and an extra 30ish HP.

Nick

SPIDERWRX

sc said it was ok, and about what it should be bhp wise. (i was looking at about 330bhp with that spec

before


after

Tidgy

tbh the mods you've added wont make much difference on there own, unless the old injectors were maxed out, if they wern't then it won't make much differance at all

jasonius

iTrader: (1)

If it's mapped to 1.2bar the it's no wonder it's 'only' making 309bhp..!

Should be able to take 1.4bar no problem. Mine peaks at 1.55bar (slight over-read from defi's apparently.. ) and holds 1.3 at over 6k..!

Madass had exactly the same issue (identical mods TBH) when his 03 WRX was mapped to 1.2bar, too conservative and he wasn't impressed. Hence him getting Bob R to remap it 12 mths later. It now produces 340+ at 1.4bar and more importantly feels much better..

Was there any reason they limited it to 1.2bar..? Which mapper did SC use..?

Tidgy

SC use Pat herborn

bighead

iTrader: (1)

I had 360 bhp out of my old vf 34

samcowrx

Get the boost up to 1.4/1.5 bar, then you will get the power you were after.

Tidgy

on who's dyno? lol

Cosworth27

What difference does the undertray make?

Cosworth27

What difference does the undertray make?

Butty

iTrader: (2)

Its not running 1.2 but 1.4 bar on the std injectors with a VF34!
Both boost profiles are identical and very smooth.
I'd suggest air flow restriction.

I had very similar mods on my old 03 WRX wagon and managed 275/270 at the wheels.

Nick

Slick81

iTrader: (1)

Car will feel quicker because rather than the turbo kicking in early in the rev range it will spool up a bit later, so you get a nice little kick, perhaps round 3/3.5 revs when the torque kicks in.

There must be a reason why its mapped to a low boost setting. Iv got a VF35 which happlily pulls along to 1.5 bar but injectors are the restriction. Not a massive difference between the two turbos apart from the VF34 is better for top end. Get it mapped for 1.3/1.4 bar and you `ll probably see a difference.

dazdavies

iTrader: (22)

Me too.

I would expect much more than 311bhp from a VF34.

Butty

iTrader: (2)

I think I may have clouded the issue by mentioning 1.2 bar.
Both the graphs show a peak of 1.4 bar, tappering down to about 1.1 bar.
If the VF34 was pushing a decent full air flow on the std WRX injectors then I'd have thought the AFRs would be much much leaner than they were.

Spider - is there any way you can get your car data logged to look at air flow and boost solenoid & fuel injector duties?


Nick