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  1. There are two recent variants of the TT-02 Type S worth considering for this; the standard kit (58600) which remains widely available and if you can still find one, the drift spec kit (47301). I purchased the TT-02D Type S because it was on offer at £99 (not to be confused with the standard non Type S TT-02 drift chassis 58584). I decided to build this rally car from the Type S chassis kit simply to see how good it would be and to answer many of the common questions which appear on here and in other forums on the suitability of the Type S for rally. I have owned a variety of the standard Tamiya rally cars over the years and although I haven't finished this yet, based on the rolling chassis and ground clearance it looks like it is going to be pretty decent for bashing. The standard TT-02 rally cars, which currently come in either the Lancia (58570) or Subaru (58631) variants, are ok but as per all regular TT-02 kits they lack any real adjustability. Notable exclusions from the standard kits which in my view should be essential for Rally are ball bearings and oil damped shocks. Common questions on setting up the TT-02 Type S as a Rally Car: 1) Why chose the Type S variant over the regular TT-02? The Type S is a much higher specification TT-02 and has a number of aftermarket parts including: [1] FRP suspension arms (51297), FRP axle uprights (51293 / 51352 ), [2] FRP suspension mounts (14305646 / 14305647), [3] metal 12mm hex wheel adapters (53056), [4] Super Mini CVA Shocks (50746), [5] full ball bearings, [6] adjustable threaded turnbuckles and steering arms, and [7] steel suspension mounts (54634). The TT-02D Type S variant (now discontinued) also includes the Tamiya aluminium propeller shaft (54501) and propeller joints (54502). The cost of buying all these separately as hop-ups including the spacers and screws and other extras not mentioned could easily be the cost of the kit again at ~£100. 2) I understand you can't increase ground clearance at the front with the FRP suspension arms? This is true in standard form because the upgraded FRP front arms are restricted where the axle upright meets the suspension arm cross bar. Removing a small amount of material from the suspension arm cross bar, increases the ground clearance significantly. The steps to do this are shown further below. 3) How much ground clearance can I get? With a small amount of material removed from the front suspension arm cross bar, using the standard CVA Super Mini Shocks with the short lower shock eyelet at the front and long eyelet at the back; the ground clearance is 1” / 25mm. You can increase this further both front and back but the maximum is approximately 35mm before the dogbone style driveshafts and turnbuckles are at a comfortable limit. 25mm is plenty for off road with this chassis and its off road capability is really limited more by wheel/tyre size beyond this. 4) Do I need to upgrade the Super Mini CVA Shocks which are included to Mini or Short CVA Shocks? No, they are perfectly fine as they come in the kit. The Super Mini CVA Shocks (50746) can be built to a standard length of 56mm using the short length lower eyelet and 62mm using the long length lower eyelet. Both of these eyelets are included on the parts tree and with the adjustability of the arms you can max out suspension travel and ground clearance with the Super Mini Shocks. The difference between the Super Mini CVA Shocks and regular Mini CVA Shocks is in the damper piston body. This is shorter on the Super Mini Shock but the piston rod is the same length allowing the same maximum stroke. When building The Type S chassis up in Rally Spec, there are a few considerations: 1) You will need a body. 2) You will need an ESC. 3) You will need Rally Block tyres. The standard rims are 1.9" (49mm) so Tamiya Rally Block tyres (50476) will fit. Modifications 1) The main modification needed on this chassis to increase the ground clearance is to the front suspension arms (51297). The rear suspension is free moving. a) The extract from the manual below shows where the binding occurs. You simply file the material away on the suspension arm cross bar (highlighted in green) to the new profile. I used a square needle file with blank edges so no material was removed from the side of the arms. I chose to remove material on the cross bar rather than the axle upright since the profile on the axle looks to be key to achieving integrity of the whole upright part. 2) The rear CVA Super Mini Shock unit needs to be built with the long eyelet (tree part 2) from the parts tree not the short eyelet (tree part 1). The front uses the short eyelet as per the standard instructions. 3) Instead of installing the suspension arms so the orientation is for the 2 mounting holes for the ball connectors that connect to the lower shock eyelets; the arms are reversed to orientate with the 3 mounting holes. These arms are fully reversible so this is fine. If the images don't show up for you below let me know and I will re host.
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