wylie1

hi ive just brought my second wrx its a 1994 mods as follow:

full decated 3" exhaust system with 5" hks tailpipe
td05 turbo
front mount intercooler
dumpvalve
running standard boost at the moment
air filter


what else would i need to get around 300bhp???


thanks

scooby L

assuming by dumpvalve you mean a VTA one..ditch that for starters... use the standard re-circ one.

A mapper will get more consistent results then

stuart148

iTrader: (12)

i think the 94 model up are 276 standard any way so you wont be far off

wylie1

yeh its a baileys dumvalve it came with the car i will be getting a blitz just getting new engine fitted at the mo then the mods can start any1 no anywhere i can get it remaped im in blackpool

scooby L

JGM
Dynamix
Andy Forest

TonyBurns

iTrader: (3)

Saloon 240ps (237bhp) Wagon 220ps (218bhp).
Now the issue is, which one do you have?

Tony

wylie1

i have the saloon tony wagons not realy my thing

V4JDMSTi

iTrader: (2)

For me I'd add:

550cc injectors,
walbro 255lph in tank fuel pump,
adjustable fpr (if funds allow, you'll get better atomisation of the fuel),
a new set of coil packs (they're likely to fail at higher boost levels if they're a bit older),
NGK pf7b plugs,
a prayer to the gearbox gods that it'll last with the upped power.

Iirc 300bhp may be the upper end of what a standard early td05 will give. You may be lucky that it'll flow a little more than that.

Unless you really like the sound of the dv remove it and go back to a standard one or at least a re-circ. I run a vta on mine but only because I like annoying people with it and the pops and bangs it helps to give

jayallen

iTrader: (31)

A chip from polar performance(probably the best chip) will see you about the 300bhp.

wylie1

thanks for the advice i was already thinking fpr.and 550`s ive read that 255lph fuel pumps can cause probs and not realy needed or is that just on there own with no suporting mods? does any1 no if the oil filter and plugs for a uk turbo would fit a wrx??

wylie1

sorry to sound thick whats a vta?

TonyBurns

iTrader: (3)

VTA = Vent To Atmosphere

Tony

timmyajmy93wrx

iTrader: (27)

Vta vent to air or atmosphere!!! Oh an the polar chip will need standard injectors but is your best an most reliable way unless you want uprated gearbox an possibly internals like crank an then ypu cud get a apexi pfc to get more power

wylie1

wheres best place to get a vta? this is only a second car as i use a little 1.2 clio as a daily driver to save more money 4 mods im looking at between £100-£200 per week that i can spend on it which mod would be the one i shud get 1st? and would stripping it out make that much of a difference in fast road driving?

TonyBurns

iTrader: (3)

Stick with the re circ that is on there, its better than any vta you could put on, will reduce lag more too

Tony

stuart148

iTrader: (12)

if its got the z4 ecu i think it will be 276bhp , i had a m reg saloon and it was 276 (but this was with exhaust and filter)

look it up mate as you never no

stu

stuart148

iTrader: (12)

1994. 1 : Impreza WRX STi series

The STi which is handmade by Subaru Tecnica International was available by order. The STi was available only manual transmission. And standard equipment for the STi included forged pistons, light weight HLA, intercooler duct, Fujitubo muffler, intercooler water splay, exclusive ECU, carbon strut tower bar, cherryred-trimmed exclusive seats, and large size rear spoiler.

Horsepower 250ps/6500rpm torque 31.5kg-m/3500rpm (STi,STi-wagon)

1994.10 : Impreza WRX [ Type-C ]

There are some minor changes. Horsepower 260ps/6500rpm torque 31.5kg-m/5000rpm( WRX, WRX-typeRA)

1994.11 : Impreza WRX type-RA STi

WRX typeRA STi was introduced. The DCCD (drivers control center differential) was emploied. And standard equipment included handmade engine producded by STi, exclusive ECU, quick-shift, power steering oil cooler, rear 2way mechanical LSD, carbon strut tower bar, large size rear spoiler, and roof ventilator.

Horsepower 275ps/6500rpm torque 32.5kg-m/4000rpm (STi-typeRA)

1995. 8 : Impreza WRX STi−2

Impreza STi 2 was introduced. Also, the 555 which has limited sport blue color was introduced.

Horsepower 275ps/6500rpm torque 32.5kg-m/4000rpm (STi)
Horsepower 260ps/6500rpm torque 31.5kg-m/5000rpm (STi-wagon)

1996.2 : Limited Edition V-limited.

The WRX typeRA STi 2 V-limited package included Sport-blue body color, original bucket seats, a WRC champion emblem, manual air conditioner, and limited edition number plate. The WRX V-limited package included ABS, green glass, original bucket seats, a WRC champion emblem, gold alloy wheels the same as the STi, and limited edition number plate.

1996. 8 : Impreza WRX & Impreza WRX STi−3 [ Type-D ]

The BOXER-MASTER4 EJ20 engine was improved. The engine used molybdenum coating low-friction pistons, multi-point injection system, IHI RHF5HB turbine, and large size intercooler. And there was a mild facelift for the WRX with new front and rear bumpers, new headlight and taillight design and a new grille. And added the SRS airbag. As for WRX STi type-RA, braking performance was improved by using 16 inches 4-pot caliper at the front and 15 inches 2-pot caliper at the rear.

Horsepower 280ps/6500rpm torque 33.5kg-m/4000rpm (WRX, WRX-typeRA)
Horsepower 240ps/6000rpm torque 31.0kg-m/3000rpm (wagon)
Horsepower 280ps/6500rpm torque 35.0kg-m/4000rpm(STi version)
1997.01 : STi3 V-limited

The WRX WRX STi 3 V-limited package included original bucket seats, a WRC champion emblem, carbon meter panel, and limited edition number plate.

The WRX 2-door type-R STi was introduced. Main feature of the Type-R are STi engine, DCCD, auto airconditioner, power window, and electric door mirrors.

1997. 8 : Impreza WRX & Impreza WRX STi−4 [ Type-E ]

There were some minor changes. WRX series emploied the SURETRAC LSD at the rear. (except RA STi and typeR STi).

Horsepower 250ps/6000rpm torque 31.2kg-m/4000rpm (wagon)
Horsepower 280ps/6500rpm torque 36.0kg-m/4000rpm(STi version)

1998.1 : V-limited

The WRX typeRA STi4 V-limited package included auto air conditioning, power window, powered door locks, electric door mirrors, quick steering gear box, front helical LSD. The WRX typeR V-limited package included STi engine is the same as the type-R STi, ABS, fog lamps, auto airconditioning, power window, center door locks, electric door mirrors. But it does not have a intercooler water splay.

The WRX type-R STi V-limited package is the same as standard type-R STi except the emblems and body color.

1998.3 : Subaru WRX 22B STi

The Subaru WRX 22B STi version is a handmade 2 door coupe based on the Subaru Impreza contested the World Rally Championship. Four hundred of these were for the Japanese domestic market and were sold out within 48 hours. The Impreza WRX 22B STi Version features EJ22 2.2liter turbocharged engine, 4WD system, intercooler water splay, ventilated discs, Bilstein inverted suspension, 17 x 8.5 inches BBS wheels fitted with Pirelli 235/40 P-Zero tyres and a twin plate ceramic/metal clutch. Also It is 80mm wider than an Impreza WRX at both the front and rear.

1998. 9 : Impreza WRX & Impreza WRX STi 5 [Type-F]

The WRX got the improved PHASE 2 engine with brand new intake manifold and cam shaft to realize improved the low-end and mid-range response. And it adopted inverted strut suspension, Sports ABS(STi), and WRcar type rear spoiler(STi sedan).

Horsepower 280ps/6500rpm torque 34.5kg-m/4000rpm (WRX, WRX-typeRA)
Horsepower 240ps/6000rpm torque 31.5kg-m/4000rpm (wagon)

1998.11 : Limited edition was introduced

1999.9 : Impreza WRX & Impreza WRX STi−6 [ Type-G ]

There are some minor changes. It was equipped with clutch start system.

Horsepower 280ps/6500rpm torque 34.5kg-m/4000rpm (WRX, WRX-typeRA)
Horsepower 240ps/6000rpm torque 31.5kg-m/4000rpm (wagon)

1999.11 : Limited edition was introduced.

2000. 4 : Impreza S201 STi version was introduced.

The S201 STi features exclusive ECU, large size intake duct, exclusive muffler, exclusive aero parts, RAYS alloy wheels, front helical LSD, adjustable suspension

L.J.F

iTrader: (31)

You may also want to get a better oil pump aswell mate, better to be safe than sorry...

Jay m A

iTrader: (2)

If you are on a budget and are thinking of the gearbox life then all I would do is:

Port the headers and uppipe
Buy a Walbro 255 fuel pump
Buy an Fuel pressure regulator
NGK 7B plugs
Clkean air filter if it is a K+N, or replace with K+N
Full service if oils are unknown
10w40 fully synthetic engine oil
Castrol Driveline (Syntrax) 75w90 for gearbox and rear diff
ESL live remap

rossyboy

iTrader: (8)

Nope, they'll max out at 340-350 bhp

Nope, Z4 is definitely 260 ps (257 bhp) as standard

A bit OTT for only 300 bhp, but maybe a good idea due to age of car.

IIRC Andy Forrest prefers VTA Dump Valves on cars with FMICs and thats good enough for me. Agree about sticking to re-circ on top-mount cars.

mslorach

iTrader: (22)

If you are aiming for 300 bhp how about upgrading the brakes and suspension / handling first?
The standard 2 pots on a 94 wrx are useless and it will be safer for you and safer for everyone else if you upgraded them, good 4 pots, decent discs and pads won't set you back too much.

wylie1

thanks 4 all the advice i notice u say 10w 40 oil i just brought 5w 50 oil as it was recommended to me by a mate who uses it in his pulsar gtir and it says its 4 high performance cars on the bottle shud i swop this 4 10w 40???

zedy

5w too thin in my opinion get 10w40 or silkolene 10w50

N_Scooby

iTrader: (2)

I have a 1995 WRX (up for sale if anyone is interested ).

This is running 303bhp / 290 ft/lbs of torque.

My Spec:

Polar Performance chip.
Autobahn FMIC
Dawes device.
Pipercross Foam cone air-filter with cold air feed from the front fog-light cover.

I also stuck a Warlboro 255lph pump in as on the 380cc standard injectors I am running pretty much max capacity for them and didn't want them to run lean (the PP chip runs a rich map anyway). It was fine without it but as the std pump was 13 years old at the time and it may have got dangerous if it stopped pumping as strongly as it did.

Without the Dawes device I reached 294bhp @ 1.1 bar boost on the rolling road so it was added just to tweak the boost to make the magic 300!!


You do not need to up-grade the brakes or suspension unless you are going to track the car or act like a loon on the streets (not advisable).
It doesn't matter if you have 1000bhp or 50bhp the car will weigh the same and will have exactly the same stopping distance as before. The brakes and suspension can be up-graded at any time, when you realise how **** poor the originals are.

If the engine and gearbox feels strong enough then you will be fine on the stock internals. If the engine / gearbox are on their way out then this will just speed up the process.

A Standard early 1994 WRX will have 240PS, but a late one with a Z4 ECU will have 260PS.

V4JDMSTi

iTrader: (2)

Personally I'd the take the dawes off. The pp chip's fuelling will be set for the 1.1 bar boost not the increased boost that you're now running. You'll be risking det and therefore a blown engine. If they do tend to run slightly richer than they need to, it will be mapped in there for reliabily and saftey. Ie so it is more able to cope with deterioration in fuel, higher ambient temps etc.

The only time I'd run a dawes would be to try and help stabalise boost not increase it without adding the addition fuel required to cope.

Jay m A

iTrader: (2)

As long as the AFRs and knock is checked out and it is within limits there is no reason not to run a dawes on any given map. It seems to me N_scooby did this on the RR so AFR would have been monitored

N_Scooby

iTrader: (2)

It was all set up on the rolling road with det and fuelling being monitored. I wouldn't have risked it if it had been unsafe and the RR session was for my benefit to settle any niggling doubts I had ( I fitted all the mods including the FMIC myself). When it got to 294bhp it was so close it only needed such a small tweak to the boost to reach the 300bhp. More could have been achieved but it just wasn't worth pushing it further. I reached the 300bhp I wanted in a way that was safe. The fuelling was very rich on the chips map which apparently is for safety.

I ran the car in this form for 2 years with no problems at all and I would still be running it today if I hadn't impulse bought another Impreza when it came up for sale. Hence the 1995 WRX is up for sale.

I did miss the de-cat down pipe off my original spec list

Stoff1

iTrader: (3)

So if you have a 95 wrx you can remap the std ecu??

V4JDMSTi

iTrader: (2)

No. You need a piggy back ecu. Polar performance chip or ESL Daughter Board if retaining the original ecu. If not there's a fair choice now of stand alone ecus.

wylie1

how much would i be looking at for a polar chip?