Worked it out!!!!
With 04 module 30tooth is recommended with 120 Spur Gear to run a 9 Turn. Ratio is 4:1 that is an optimum start point.
for 06 module which is what i ended up buying i opted for a 96 Spur and 24Tooth Pinion giving the same 4:1 Ratio.
Tested the car after installing new gears and you couldn't wipe the grin off my face
The car is just awesome!!!!!