Thought I'd update you as to my progress with the conversion... I found an iPhone app that calculates your speed through GPS, so at £2.39 I decided that would do for now
Heres a screengrab:
Here are some of the different 'speedo' skins you can choose from:
And heres what it looks like in the car:
Obviously its not the most ideal solution but GPS is meant to be more accurate than an average cars speedo, although it does have problems finding a GPS signal when its very cloudy (I guess due in part to the iphones crap gps).
1999 RS200Z Blue. Kakimoto Exhaust, Exedy Stage 1 Clutch, TODA Racing Flywheel, Tein Coilovers, Advans RG Alloys, TRD shortshift, Räzo knob, Nardi Classic Steering Wheel, Recaro seat, Walboro GSS342, Power Enterprise air filter.
Coming soon: Rotrex C30-64 Supercharger, Caldina GT-T Injectors, Power FC