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Tamiya Subaru Impreza WRC 2004

Paints:

  • Coming Soon

Extras:
  • Shortened front and rear shocks to lower the body on the chassis
  • Chassis modified to match with the shortened shock absorbers
  • New higher drive shaft tunnel constructed
  • Almost all original interior mounting points sanded down
  • Scale Model Works stainless steel HKS silencer
  • Exhaust pipe modified to allow fitment of the SMW silencer
  • Hobby Design HD03-0170 AP Racing brake calipers
  • ScaleLab_24 photo-etch 15mm disc brakes
  • Fujimi Right Hand drive Subaru Impreza dashboard
  • New dash was fully modified to turn it into a race-spec
  • Scratch-build 3-gauge center dash pod
  • Scratch-built ECU, Display, Battery + Holder and Gear Lever
  • Original hand-brake was modified to alter lever position
  • Added a modified swirl pot, fuel pump and hose in the boot
  • more Coming Soon
Tamiya Box. Subaru Impreza WRC 2004 Rally Japan kit, No.24276
This is being built for a group build being organized on facebook by 1/24JDM. The idea is to turn a Japanese vehicle into a track car. I saw this Impreza as the perfect candidate to turn from a WRC into a Track! Above picture is the one used to submit my entry!

First thing I did was to test fit the ride height to see how much lowering was needed. So I cut off all the chassis parts and assembled them temporarily in place using blu-tac!

Since this is a gravel version, I was expecting the ride height to be high.. but not this high!! I was shocked to discover it needed so much lowering as it means much more work! Lesson learned for next time... get a tarmac version WRC kit, not a gravel!! Rims and tires seen above are the ones I'm planning to use and come from another Tamiya WRC kit

Here's the culprit of such a high ride height! Lowering this will be easy by simply chopping that long arm off and re-join the suspensions. However modifying the control arms to a new position will take much more work and time. Let's go...

First thing to do is take out the knife and start cutting to get the Impreza to sit right!

These are all the steps to get the shock absorbers lower! Cutting, drilling and joining!

With the suspensions cut short, everything around them had to sit at a higher position. First thing I did was to cut off the lower part of the engine from the engine bay

Then, I needed to lower the rear control arms mounting points. I first cut a hole where the original position was, then using styrene I constructed new positions for these to rest onto. Another piece of styrene was added next to the engine for new mounting points

Above, all work on these new points is completed. Just some further smoothing required

All that remained was to mount the suspensions and control arms in their new higher positions and check the front ride height. It's the height I was aiming for, so off to the rear!

For the rear I began with the suspensions where these were shortened by 2mm

Then, it was time to lower the whole differential assembly by 2mm to match with the shorter shock absorbers. This was achieved by cutting 2mm off the top of the structure beneath the differential, seen in grey above as before (inset) and after

Everything was re-assembled and now the body sits where I wanted it to be.. perfect!

Here I thought that I was finished from the chassis modifications.. but I wasn't! Having a higher front and rear set-ups, meant the drive shaft will now sit higher too and this came in contact with the tunnel floor! So this had to be cut out and a new one built higher!

I began by first making two straight pieces of styrene on top of the old tunnel to achieve the new required height, as seen above

Then I placed a flat piece of styrene to cover the hole cut earlier. This will be detailed further at a later stage. I have also sanded down almost all of the original interior items mounting points, as these will be replaced or relocated. You can also see that the driver seat brackets were completely removed as the Impreza will be converted to a RHD!

Finally, this is how the underbody looks now. The front part was lowered to avoid the gearbox touching with the floor. Also the gearbox pin lenght was adjusted. In the middle, the new tunnel can be seen in its new height, making enough clearence for the drive shaft

Next work was the exhaust. The Impreza already comes with a straight pipe, so that's great! However the back silencer needed replacement and for this I chose an HKS unit from Scale Model Works. I have a review on these exhausts which can be seen here

On the back side I cut the original silencer off and added two different diameter plastic rods. The transparent one above is the same diameter as the HKS inlet to facilitate installing it. On the front side, I had to add an extension to the exhaust pipe as this became too short due to the re-location of the engine at a higher position

The rear bumper also had to be slightly sanded down around the exhaust hole due to the larger diameter exhaust. All that remained was to test fit the whole exhaust in place

The bumper hole diameter also had to be increased due to the larger exhaust tip. I really like the way the exhaust looks from behind, these SMW exhausts are very realistic

Next job was a brakes upgrade. For this, I chose the 15mm Photo-Etch disc brakes from ScaleLab_24 and AP Racing Calipers from Hobby Design

First thing to do is put the photo-etch disc brakes together, by first cutting the front and rear flat parts, then the grills and finally attach everything together

Then it was time to make them more realistic. First I attached the discs on a sanding stone using double sided tape, then slowly scratched the surface to achieve that worn look

Finally, here's a comparison of the kit disc brakes and my newly finished combination

Click for more info

With all the chassis work sorted, it was time to start working on the interior, beginning with the dash. The original supplied with the kit was great for a track car, however it was a Left Hand drive and I couldn't keep it like that since I was after that JDM look. So after a chat with a local friend, I was the owner of a new Fujimi Impreza dash that was Right Hand drive.. Thank You Gilles! Time to modify this, beginning by cutting off the bottom part

Then I opened all the dash vents to simulate these has been removed, making it a more race-spec dash. Then I found a piece of 3mm styrene to build a 3-gauge pod

Then I constructed the 3-gauge center pod, using a piece of styrene for the bottom and also a piece of transparent wire heat-shrink to simulate the gauges covers

Next job was to cut a hole in the top middle part of the dash to allow the gauge pod to sit into. Then, I realized that the new dash was shorter than the original and there will be a larger distance between the seat and the dash. This was due to a longer rear part on the original, so I began by cutting out both rear sections of the dashboards

Finally, the rear part from the original was glued to the new dash, achieving the same length as the original dash. This was then smoothed and the new dash called done!

Then it was time for some scratch-building! Referring to photos of real items, I made a Motec ECU and Display together with a BuddyClub battery and bracket. These were made from extra pieces of resin I had left over from the FD2 Civic build and styrene

I also scratch-built a racing gear lever using metal wire, resin, styrene and wire insulation. As for the hand-brake, I decided to use the original Tamiya one however this was modified

The original kit pedal box received some new styrene pedals to make it more detailed, while the enclosure received some cutting and sanding to make it more track-car friendly! 

Next job was the fuel system where I took the original WRC automatic fire extinguisher and modified it to look like a swirl pot. Then I also made a new fuel pump and filler hose

Next job is to continue working on more interior components, so keep watching this space for more updates!

More info inside
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