cbscooby

iTrader: (1)

Hi all

I have a 54plate wrx. Which I would like to up the power on. At the moment it is standard apart from a dump valve which was on the car when I brought it
Want to know what I should do roughly how much it will cost and roughly what power in could expect from what you say
One thing I don't want to do is sell it and buy an sti which I know will be a suggestion

the shreksta

iTrader: (20)

de-cat + re map will give you about 260-280bhp,after that you will need a bigger turbo (vf35 is common-my wrx made 354bhp with one)

sti injectors/upgrade pump and sti top mount along with colder plugs (ngkpfr7b) for a start along with a vf35 should make 320-350

de-cat the up-pipe with an sti version - £40ish

vf35 £280

injectors £100

pump £70-£80 (i use a rcm340)

sti inlet manifold for deleting the tgv's £50-£60

sti top mount + scoop/undertray £250 ish

and put the standard oem dump valve on

open source map £350

dont forget to upgrade your brakes/suspension to cope with it aswell

ditchmyster

iTrader: (7)

Decat, panel filter, fuel pump, remap, should see you around 270bhp, if you want any more then your into turbo and injectors.

decent pads and discs,braided brake lines and geo set up.

ScoobyNoob79

First, get rid of the dumpvalve, put the standard recirc on. Then headers/uppipe, decat, uprated fuel pump, sti injectors, exhaust and a remap.

Should be good for 270 - 280bhp but then your probably going to want better suspension and definately better brakes.

280bhp is about the limit of the TD04.

Scott

Norman Dog

iTrader: (1)

Why?

Mine made 287BHP with a VTA dump valve.



You don't need headers, STi injectors or fuel pump for that level either.

ScoobyNoob79

Well, if you're not running mafless your car has accounted for how much air has gone in so puts in the required amount of fuel, the VTA lets that air out but you still have the same amount of fuel in, so you run rich, better than lean but still not right.

Ohh, and everytime you change gear you sound like a t**t

MattyB1983

iTrader: (51)

I think you should still be asking the questions rather than answering them

RS_Matt

TDO4 can and should do 300 with the right supporting mods. Maybe 310 with headers, DEI wrapped exhaust, MAF clean, Do-Luck panel filter, AC removal and Nanodrive oil! It'll also hold 1.4 bar for a large part of the rev range.

You can probably push 300 with a £70 front entry TDO5 without that many supporting mods but larger injectors would allow more scope/boost/safety.

Both routes need map and 5.1 brake fluid/uprated brake lines.

scoobyboy1

iTrader: (16)

Love your optimism Matt!!

MattyB1983

iTrader: (51)

Why would the removal of AC provide more power ???

RS_Matt

2.5" Exhaust system
3 decats
STI TMIC
STI pinks
Walbro 255l
Do-luck panel filter
Millers Nanodrive Oil
Turbo heat shielding
DEI wrapped headers/up-pipe
AC removal with perhaps other parasitics removed.
NGK 7's
The all important MAF brake cleaner blast.

I'm not sure if Cams and ECU change could get the bitch to blow 315bhp? Or if an added cold air cone filter kit/huge front mount/and ported headers could give a small increase.

I doubt anyone has ever tried!!!

Fudgey

iTrader: (1)

Because the engine uses power to turn the belts and pulleys etc. granted not a lot but it uses some.
Like if you went dry sump, the crank wont be dragging through the oil causing drag. Again very minimal gains but there will be some. (People dry sump for may other reasons tho, not to gain 0.5 bhp lol)

scoobyboy1

iTrader: (16)

Or I doubt anyone had got 315bhp from a TD04(non hybrid)

270-280bhp is pushing the limit of a TD04, and im pretty sure it could not flow enough air to even crack 300bhp, so you can add all the mods in the world and i think you would struggle!!!

But in your world Matt, im pretty sure there are plenty of WRX's running 400bhp on the standard TD04 and a bit of MAF brake cleaner.

ditchmyster

iTrader: (7)

Brun

300 has been done more than once on a TD04

ScoobyNoob79

No, I'm just a pessimist, do a lot, expect little, when you get more it's a bonus

RS_Matt

Yep

...and there's a thread on NASIOC where someone RR'd an STI after AC removal and got 8whp from it!

I'm not sure if the ABS and Power steering would see gains or drive-train lightening bits, like everything Scoob related, nobody really knows.

Maybe Project 320 would be an interesting Scoobynet venture?

Also regarding BOV's I understand Turbo cars run slightly rich due to the cooling properties of petrol, so wouldn't a MAF equipped car see benefits from a quick cooling spray of petrol between gears?

daly.88

i seen in a few threads when upping the power to put back to oem dump valve why is that??

ditchmyster

iTrader: (7)

Metered air escaping , leading to over fueling which results in bore wash which can = excess un-burnet fuel in the oil, resulting in big end bearing failure.

MattyB1983

iTrader: (51)

Surely just keeping the ac off is a better plan, unless the weight loss is wanted.

RA Dunk

You didn't 'brought' it, you bought it.

maca1983

iTrader: (3)

Wow this thread oozes handbags and bitchiness!

JDM_Stig

iTrader: (3)

The AC disengages on WOT anyway so no real loss when your on it.

Dave Y

iTrader: (52)

whatever route you decide to take get all your upgrades together then pay for one remap.

daly.88

my ssqv is comin of right now i dont want bottem end goin no way cheers pal

WRX Blues

Add a 'Turbonator' - that should give you another 50hp

RS_Matt

My car suffered bore wash, I took it to a reputable tuner and said was it the VTA that caused it? He replied "no," apparently the squirt of fuel is negligible. AFAIK a pop and bang map would throw in more fuel on the over-run.

Norman Dog

iTrader: (1)

http://www.andyforrestperformance.co.uk/58901.html

There you go, that explains the different stages/Power levels.

RS_Matt

Interesting to note AF is nodding in the direction of the WRX flirting with 400 before drastic measures. Providing you're not launching at 6k at every junction like an STI driver.

Also 290bhp then pinks needed isn't that many miles away from the 300bhp I claimed with stock WRX injectors. I think if memory serves me correct a member on here ran 301bhp on stock injectors, can't remember how much head room he had left.

The more I research the 2001-05 WRX the more I think it's a damn good buy, just the horrid standard brakes. Also in standard form WRX 30mpg STI 25mpg? Is that due to the revvy nature of the 6 speeder and the over all extra 90kg??

MattyB1983

iTrader: (51)

Pinks are not needed at 290bhp. In his article he states standard injectors are 380cc but they are infact 440's are they not which can cope with circa 320bhp at standard pressure. Add a fpr into the mix and they'll cope with quite a bit more.
As for flirting with 400, yea the standard box will cope but for how long is questionable. I'd be more concerned about the longevity of the standard engine at that power.