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Typical Upgrade Path Newage Impreza 2.0 WRX


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In std form they are 220bhp give or take and have boost at
about 0.95 bar. The boost profile in the std map is pretty tame and doesn't come
in til 3500 rpm assuming the car is std.

 

 

 

so… choices

 

1. Keep the car std but just remap for more oomph and better

fuel economy.

 

A full custom remap will bring boost in much earlier and
hold higher boost levels for longer but the map will be geared to running much
more efficiently ( which is also more economically) as it wont be possible to
push too much boost with all 3 cats in place. Typically a
Green/K&N/Cosworth air filter and a backbox are fitted at this stage.

 

This would get the car to about 250-260bhp

 

 

2. Sports cat in downpipe – remove centre cat

 

A full custom remap will bring boost in much earlier due to
the lower back pressure and hold much higher boost levels. The remap will also
aim to get it running much more efficiently ( which is also more economically).

 

Typically a Green/K&N/Cosworth air filter and probably a
3 port solenoid are fitted at this stage (on top of the sports cat downpipe and
exhaust system).

 

 

This would get the car to about 270bhp but a huge boost in

torque figures in the mid range.

 

3. Fully Decat Exhaust

 

The low back pressure from removing all the cats is now the
equivalent of the turbo running around the garden naked shouting “look at me
I’m free”. A remap is needed to bring it under control and stop overboosting.
The remap will bring boost in as smooth as possible and most likely get full
boost at around 2700 rpm and hold higher boost right through the rev range. The
remap will also aim to get it running much more efficiently ( which is also
more economically).

 

Typically a Green/K&N/Cosworth air filter and probably a

3 port solenoid are fitted at this stage (on top of the decat downpipe and
exhaust system).

 

This would get the car to about 280-290bhp but a huge boost

in torque figures in the mid range and transform the way the car drives on the
road.

 

A walbro 255 fuel pump is advisable but not 100% essential.

 

4. Getting to over 300bhp

 

A lot of people want to do this, it is a nice bhp figure for
the pub after all. So .. how ? The std TD04 turbo will not do it unless you are
on a dyno that reads very optimistically. It will need a turbo off its bigger
brother STi version.

 

There are many many choices of turbo for this VF30, VF34,

VF35, VF43, VF48, TD05 16G etc etc but all of these will need a couple of other
changes to the car before hitting the mark safely.

 

– STi Injectors – 550cc (Pinks)

 

– Walbro 255 pump

 

– worth changing the uppipe for a decat version

 

– probably an STi TMIC although the WRX will suffice.

 

 

It is also advisable to change to NGK PFR7B spark plugs.

 

There is a lot of info around about the different turbos and

what they are capable of – the VF35 makes the best upgrade in my opinion at the
moment and should hit a nice safe 320-330bhp. This is pretty much an ideal
level for the WRX keeping it within the capabilities of the engine, gearbox and
clutch.

Some other info:

 

– a vent to atmosphere dump valve will not improve the
performance but if you must fit one for the sound then stick to a good make –
forge have always been good from what I have seen. (Baileys are less so)

 

– a FMIC is not needed at this stage and tbh is always the
wrong mod to do on a WRX.

 

– an induction kit will most likely not improve performance
as the std airbox is very good. If you do want more induction noise then go for
a cold air induction kit such as the K&N typhoon where the filter is
located away from engine bay heat.

 

 

 

Anyway … hope that is useful. The information was provided by Duncan http://www.racedynamix.co.uk/

This information is provided as a guide and not to be used to argue who's the best mapper

As we're a non biased club :) Mappers contact details for some reputable mappers:

 

Racedynamix

mobile : 07540 185754

email : duncan@racedynamix.com

http://www.racedynamix.co.uk/remap/

 

Scoobyclinc

Tel: 01246 590807

Email: info@scoobyclinic.com

Nether Farm

Stubbing Court

Wingerworth

Chesterfield

S42 6QX

http://www.scoobyclinic.com/

 

 

Area 52 Autosport

Unit 2 Park Court

Park Lane Business Park

Kirkby-in-Ashfield

Nottinghamshire

NG17 9LE

http://www.area52autosport.com/

 

Andy Forrest Performance

CONTACT

sales@andyforrestperformance.co.uk

Payments via

paypal@andyforrestperformance.co.uk

Tel

01875 811811

AFP 

Harbour Garage

Port Seton

East Lothian

EH32 0DS

http://www.andyforrestperformance.co.uk/4436.html

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