My Myvi RPM is 2.9k at 110km/h...Is it normal? Or should it be lower..My dadz 4wd only 2.2kRPM at 120km/h but bigger CC lah.

Engine braking does not use fuel. At that moment, it is the wheels driving the engine and the throttle body is shut. There is no need for fuel to go into the engine until the idling control valve takes over when the RPM drops too low. So there is no waste of fuel.

Those people driving autos would appreciate the engine braking feature in the campro when they come down from Genting.

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Added on August 1, 2008, 3:19 pmMost of the time the differences is maxed out at about 5% and not as much as you have mentioned. We were over exaggerating our examples before this to emphasis the point of the discussion.

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Added on August 1, 2008, 3:22 pmHe thinks that he could oversize his tyre to the point where he gains a 20% increment in speed difference so that he could actually travel at 3k rpm @ 110km/h (meter speed) but moving at 130km/h on his actual speed.

This post has been edited by sleepwalker: Aug 1 2008, 03:22 PM

err anyone can answer me bout the gearbox? can we change to other gearbox?

No wasting petrol.. your fuel consume maintain at RPM 1100 rate

Vios/Belta 2.5krpm @ 110km/h. (2krpm @ 80km/h)

No use fuel no into engine will mati engine laa..haha

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Added on August 1, 2008, 3:29 pmYes, you can change suitable gearbox.
But i dunno which gearbox can install in only.

This post has been edited by LeVis_Jeans: Aug 1 2008, 03:29 PM

Car draging the engine, the engine is moving, how to mati - the engine is driven by external force.

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Added on August 1, 2008, 3:34 pmIt might not be a perfect fit and 'long lasting' might be an issue. eg. Fitting a K50 trans (KE70 manual) on a 4AGE (AE86) would kill the K50 faster. Hence it is better to get T50 (AE86 trans) together with 4AGE for mods.

This post has been edited by dstl1128: Aug 1 2008, 03:35 PM

so we can install gearbox diff from ours if compatible? no nid to change other things besides our gearbox only? so wat gearbox is suitable for this camtakpro engine besides wat we hav now la?

Different gearbox sure, either there is a commercially available compatible (mounting) ones, or you found a gear machinist that could machines out the cogs/gears with the ratio you like. If you have the money, even mounting can be changed.

Hmm... Possibly those from Mitsubishi or Renault ones might be possible for the Campro.


This post has been edited by dstl1128: Aug 1 2008, 03:40 PM

This shows how little you know about engines. Fuel is need to keep the engine alive when it is idle. You don't need fuel to keep the engine alive when it is driven by an external force.

On our car's ignition switch, there are 3 positions. First is OFF. Name me the other 2. If you don't know what they are, then there is no point continuing this discussion as you would not understand. Once you find out what they are, you would understand why I said that you don't need fuel to keep the engine alive.

Another hint.. Why can the car be pushed start when the battery is dead? There is no fuel in the engine and there is no battery to crank the starter but PRESTO... magically the car can start when it is pushed. If you get my hint, you would understand.

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Added on August 1, 2008, 3:44 pmThe question now is what gearbox is the campro based on? I can't remember. I've lost track of Proton Campro developments as most parts are not related to Mitsu anymore.

It's always possible to change if it fits but why do you want to? Why change when there is nothing wrong with the gearbox?

This post has been edited by sleepwalker: Aug 1 2008, 03:44 PM

so it is possible rite? juz the long lasting n compatible issue only rite?

thnx for the explanation

Aiya i know that..
It use external force to turn on your engine.. but u forget after turn on the engine, the engine also need keep using fuel to keep alive.
You say down hill.. yes, engine still alive. But it will die when at flat road when u are no fuel !

Your example is use for battery dead. But when it push and get starter the car. you also need fuel..

No fuel go engine = engine dead.
Pls.... no engine will running will alive without fuel unless u force him by your self.

hahaha... engine still need fuel le.. its in idle even dragging by external force.. its preset by the fuel injector "engine management chip" and by manual twisting fuel screw beside my beloved bike carburetor..

no fuel engine mmg mati la.. hahaha.. internal combustion engine need momentum to stay continuous explosive..

penat engineer buat flywheel tu..

This post has been edited by popnyat: Aug 1 2008, 03:54 PM

Ya la.. agree with u.
Maybe my english not good. so he confuse already.

err if lets say u guys know campro auto gear is sluggish rite? u can feel the diff with other cars like p2 or other car manufacturer.. it is not very smooth, when from idle to 'd', the car will jerk a bit, not very smooth... the car is new...

so tht thing is related to engine or gearbox?

err ok so maybe i want wrong info here, sori sifoo sleepwalker

hehe.. complicated dy.. heard of rotary? triangular shape horizontal spinning piston in rx8..

Myvi Ezi 110kmh@3000rpm.

You did not even read my reply properly. I said that there is no fuel used as you are going down hill until the idling controller takes over when the rpm is too low.

Once you hit flat road, the idling controller takes over and pumps fuel to keep the engine alive. While you are going down hill, fuel is not needed to keep the engine turning because it is being turned by the gearbox.

Abit sluggish.. because of low torque in low revving campro.. even appear in lotus website.. they remedy this by introducing variable valve in CPS engine.. valve timing and opening duration by computer calculation..

one good thing about persona auto trans its 4th gear revving lower than 5th gear manual trans..

highway driving was superb.. but takdak pickup.. because high ratio different between each gear..

ultima.. i got persona too.. H-line..

who says i got persona

oo ok, so its the engine tht makes the gear sluggish rite? okok i got it, thnx u guys