well Nizmo,
my dads a mechanic and him and his boss told me that the overdrive switch is only meant to be used above 70 km's/h and that having it on while drivin on normal ctreets could cause damage, because it forces the engine to stay in third gear instead to changin to fourth and reving lower. But, theyre used to aussie cars like falcons and corollas and the like, so the purpose of these switches in japan spec cars could be different to their purpose here.
In my opinion, it rev's the same and changes gears the same when you take o/d off, i havent noticed any difference. But with poer on it changes quite a bit later, especially when u give it, mine changed from second to fourth at 7 grand once!
hey, when you's race do you's start in 1st then go to 2nd then to drive, or just give it straight from drive?