actually, nearly every car gbox has overdrive gear @od. Generally, Its gear that ratio is less than 1, n normally last gear. Like honda's 5 at, it has 2 overdrive gear. Thats why now 4th gear in the gear slot. Reason, to lower the engine rpm to give better fuel economy,but has less power coz torque is lower at that rpm during cruising. Like honda's, sudden press on accelerator, cause it to downshift to third. for manual, normally, if its 5th gear, then its is the fifth. But some has dual overdrive also like aichikikai in saga blm n fl.
In auto, if to overtake, sometimes it has off overdrive button. If u switch off overdrive, u can feel, the power is coming n rpm raising bcoz it down shift n never enter the last gear@overdrive gear. In prev mitsu auto trans in prtn, prtn dont use button, but u can see number 3 in the gear slot, it has the same function. To off overdrive, so, gear only shift in 1,2 n 3rd gear only.
For punch cvt,its quite unique. If in sat mode, there is no overdrive mode, but in full cvt, there is. Since cvt is stepless, then the general rules on ratio below than 1 isnt apply. Check ur manual book, u can the diff between last ratio on full cvt mode with last ratio in manual mode.
Previous setting is heavily labour for fuel efficiency, but the main problem(when people complaint), it has sluggish feeling n people tend to press hard to accelerate, so, beating the original purpose of the tuning, then fc will also affected.
Then, by giving diff setting, change resistance point, clamping n etc, u will get better acceleration, but if dont cntrol ur right foot, also mean the same thing. But it seems they compensate that by bringing down a lil bit the rpm than usual during full stop by using footbrake, normally around 650 to 700 rpm, now its lower. Exora tuned is nearly the same coz its heavier than preve, but of course, need to alter n test it b4 deliver to customer.
Even people said they dont listen, but they do listen, dont they :-).
Added on November 3, 2012, 1:21 amn mr gk lai, its like u r driving a new car(albeit not really new), its back to ground zero, same as ecu reflash, both tcu n ecu, need to learn back ur driving pattern b4 deciding the best between power n fc, the balance. That is adaptive programmed is all about. Just be patience.
As i mentioned really early before, they can make it fast, i mean really fast, but many things need to consider n many objective need to examine b4 deciding coz for example, if there is no torque reduction n crawl strategy, the car will be fast coz all the torque will be sent to the wheel. If u just drive around neighbourhood, a slight tap on the pedal can cause the car to launch rapidly n its quite dangerous, same as when u search for parking. U need to remember, in cvt, engine speed(rpm) easily can goes up, n the cvt is stepless, u dont want to bang the wall@another car when park.
Diff from step auto or manual where the speed is limit, like 1st gear, is only until 50kmh only, even at high rpm, for example, 6k rpm, 1st gear only take u up to 50kmh, but in cvt, 6k rpm, means highest speed as possible, in cfe, beyond 200kmh. Thats why cvt is banned from formula 1 earlier, coz if implement torque reduction, it become slow, if release all torque, it become too fast n maybe uncontrollable. So, its not as easy as it looks in mapping cvt tcu n mapping engine ecu to work together in harmony.Happy driving.
So, I quote this for EB owner from Preve thread. Hope it is useful
Something I read over at autoworld forum (
http://forum.autoworld.com.my/index.php?s=...dpost&p=1841001 ). Perhaps something to keep an eye out for. Hopefully not
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latest news....i went to ipoh from seremban (whr i stay) on 5nov. after reach ipoh i had lots of running around to settle some issues so i was using the car continuosly. then suddenly at night the car stalled in the middle of the road. it could not restart at all. went out & check all the usual things n everything seem ok. then i called the i-care 24 hrs assistance n they asked me to dismantle both battery terminals & reconnect after 15 minutes which i did but still could not start. they don't have any towing assistance so they asked me to call my insurance company for towing. they towed to the nearest proton edar workshop.
next day morning i went n the technicians could not find what the problem exactly was. the car could never be started,when you push the button there is engine cranking sound but it would not start. by afternoon they found out that the spark plugs have chipped so they knew it cannot be repaired on same day as they need open the engine. they gave me a relief car to travel back to seremban. so far no news & m pretty dissapointed that the engine could fail on the 3 months old brand new car. hmmm
i mean to say that the spark plug has broken a bit...its not plug problem..they said the cylinder head has craked...so they are weighing the option of just changing the cylinder head alone or change the entire engine...
