Applies to auto only la... Test driven, the power delivery below 4k RPM is pretty much useless.. Acts like VTEC sia, must rev to certain RPM then only suddenly the CPS kicks in...

based on Neo CPS can't keep up with his car

Got.. toyota sc said the gb going ko soon..
changing it will cost a bomb..
So trade in for persona

Talking to me

you go see R3 engine bay you ma know lo

mivec more power?

LOL... How old was the Unser?

xandras was race wit neo cps auto b4??

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Added on May 17, 2011, 11:24 pmdefinitely lo

This post has been edited by samwongjyhhorng: May 17 2011, 11:24 PM

you still don't get me,
do you know what is the different between IAFM and VIM?

someone posted in the forum before, complaining his stock cps neo can't keep up and got tapau-ed by a PE(suspect is Xan's car) at kesas, after my 1k service if not mistaken..

Not sure..
I remember the unser is the last batch of unser already..
After that replaced by inovva already..

Mivec = Mitsubishi Innovative Valve-timing Electronic Control. It's a form of Variable Valve Timing, just like what they have in Toyota, Suzuki, etc.

Except that in Toyota, the VVT system is pretty much tuned to provide good acceleration. MIVEC system controls valve timing and lift to provide both low & top end power.

Too much to explain lar... Campro IAFM still very primitive la compared to MIVEC, but I've got no complaints...

maybe u can explain it as well

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Added on May 17, 2011, 11:29 pmi believe it oso..xandras car is very powerful lo

This post has been edited by samwongjyhhorng: May 17 2011, 11:29 PM

Yes I do know the difference between IAFM & VIM. What I meant is, even with VIM in CPS, the auto version still suffer at low end. U're driving a manual CPS, aren't u? Don't get me wrong, CPS is all good, only if u get the manual version.

What the VIM does is to balance out both at both low and high engine speeds, but then what they did is they smoothen out the low engine speed power delivery to smoothen the idling. What Proton say is that this will improve low end power around 2-3k RPM, but I find that FOR THE AUTO VERSION, anywhere below 4k RPM for the CPS is pretty much useless. And yes, I don't understand the science behind why is this so when the MANUAL VERSION THAT I'VE TESTED ON MY FRIEND'S GEN2 CPS is so much better.

U get what I'm trying to say?

actually i just wanted to say,

IAFM and VIM both devices basically is to handle low torque curve over the standard DOHC Campro engine.

I beg to be different if IAFM is way better than VIM since both devices are work as almost same function.

that's good enough for anoob like me haha.
exora using mivec wor(if no tmistaken)... so keng meh

btw thanks !

And how the both devices work the same way? VIM switches between lengths at different engine speeds, IAFM don't as it merely smoothens out the low end torque band, eliminating the torque dip issue. VIM needs to be coupled with CPS' valve timing and lifting to work, it can't work as a standalone while IAFM can. IAFM works according to the engine's suction. VIM doesn't.

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Added on May 17, 2011, 11:41 pmWho told u Exora using Mivec? Inspira is the 1 using Mivec Mitsubishi Engine. Exora using CPS.

This post has been edited by xandras: May 17 2011, 11:41 PM

oh shit salah tgk ahah.. sry sry...

Wonder if they would ever come out with Inspira 1.6 CPS... sure many ppl buy.. XD

Boss,
my meaning of same function is on Intake System lah ...
VIM only switch to short runner when the RPM is > 4800rpm.
The engine's Variable-length Intake Manifold (VIM) switches between a long intake manifold at low engine speeds and a short intake manifold at higher engine speeds. Proton is using a longer intake manifold to achieve slower air flow; as they found this promotes better mixing with fuel. The short intake manifold allows more air in faster. This is beneficial at high RPMs.
Proton claims that there is better response and torque at low engine speeds of between 2000 - 2500 rpm.

all copy and paster from here : Campro Engine

less one.. i'm not buying...