hmm it is good that you have faith with the car you are using...

eh using throttle control might help you in wet... i last time use
an altezza too...
which means, when you do cornering, don't ram the gas
pedal immediately... instead, you have to slowly depress the gas
pedal so that your altezza will not get out of control easily in
wet and snow... last time, i love to take my opponent to akina
snow... keke...
hmm thinking of this, i recall an
incident with a friend of mine... haiz... 
eh if you really want to use this method, i strongly recommend you
to get the enkei 5 spoke rim, eh its the hidden rim, i bet you
should have got it by now... using throttle control with this rim
is the best combination for altezza... hope this helps... 
hmm, now i am using EK9, all my timings are sucky already... hehe i
must have play maximum tune too much already... haha... :p