more info here:
http://en.wikipedia.org/wiki/Campro_engine

For those lazy ppl, i'll try to summarize. There are 3 Campro engines out there:
1. Plain old CamPro (all proton cars after Waja and before New Saga)
2. CamPro IAFM (New Saga and latest batch Persona)
3. CamPro CPS (Gen-2 CPS and Waja CPS)

The plain CamPro was supposed to have cam profile switching technology since the very first version, but it was dropped to save cost(?). As a result it had a big ugly torque dip at lower rpms (i.e. no power unless you rev high).

IAFM stands for Intake Air Fuel Module (lol @ i am fat man). I dont know how it works, but basically the torque dip is gone. No need to rev so high, easier to handle in city driving and traffic jams.

CPS is the real Cam Profile Switching technology, which also has the same effect as IAFM. Maybe a little bit more overall power. It comes together with something called VIM (Variable Intake Manifold) but usually it's shortened to CPS only.

Interesingly, if you try to read CamPro CPS in full (no short form) then it sounds like Cam Profile Cam Profile Switching.  It should also be noted that none of these are cutting edge technology developed by proton. They exist in many other cars, probably under different names.

Sorry if i made any mistake in my post...cya 

campro = no variable cam, no variable valve, no nothing

iafm = TVIS found on 1st gen 4AGE from AE86 from year 1985 

cps = variable valve lift which dont work. a sophisticated and well designed engine with valve lift tech should make 165hp like B16A. this "new technology" could be found in 1988 EF9 CRX B16A

vim = variable inlet manifold

today is 7/4/2008. phailed

technology followed far from behind the century eh?

Whoops. I stand corrected, thanks. 

Then again, Gen-2 CPS engine block still says Campro CPS. I have photographic evidence. 

then what is in the registration?

campur?
o maCAMPRO ?
hehe

btw, rebore the campro block and fit bigger bore piston to increase the displacement lor....

errr...IAFM is external device at the air intake rite?so,is there any chance to put it to normal campro arr??

it tot original cam campro oledi use high cam.or i'm wrong???dat's why campro power only comes at high revs.

change to highcam can save petrol??..   
2 sets of cam??... or u mean the cams has 2 profile lobes like vtec??...  

somehow i dont see any difference in performance during switch over of the cam profile....   

seriously, this is the first time I heard such thing as installing high cam can save petrol.
so, they basically have the secondary cam eh? How's the activation of the higher cam? Is it similar of to the VTEC's?

I thought CPS is something like DVVT, VVTI, etc? 

then whats the use of cps leh??... jz to cover the torque dip in the dyno chart??.. 

vtec open at about 5k plus i guess.... 7k almost end of the power graph lor....

campro cps using what ecu??... siemens??... u think anyway in the future someone would take campro cps cams and regrind the higher profile camlobe for better performance??....    den we can have power jump/increase like vtec or mivec...   
u've mistaken VIM for CPS ler... 

owh.. really ar? hehe.. y ar? so, what is VIM and what is CPS?

vim at low end? cps at high end? proton website tell u this of course..but real life it is not like this

CPS is not high peformance engine and not fuel economical engine..then wat is this engine good at? boat anchor perhaps..

if cps isnt mean for fuel economy..why should proton make something that is not economical and put it in a low cost everyday family saloon?

yeah like i mentioned up there. sometimes THEORY can't be use in REAL LIFE situation, hence need hands-on testings.

Someone with CPS please give comments...

VIM = variable intake manifold

why CPS and IAFM/VIM phails??... VIM phails because there isnt any major difference manipulating the intake length path... CPS phails because the higher cam profile isnt as great/powerful/high as vtec or mivec.....


wait, i dont think it is necessary since there isnt any significant switchover between both cam profile... haha... 

CPS and vvt is totally different thing lah... vvt/dvvt/vvti all those manipulates the cam timing (advance or retard according to driving condition/style)... while cps the technology of the valvetrain, similar to vtec or mivec....

okla... dont say it fail la... say it incomplete.... isnt outstanding....
vtec engines took years and millions of money to improve its technology... we'll see how cps will fair in the future...
yea... jz like malaysia football.... didnt lose 10-0 consider ok lor.... lost 2-0 considered win as well...  

how the cps operate?
i mean, like vtec it uses rocker arm n solenoid to allow oil pressure engage the high lift rocker arm.

got any cps cross/cut away section of engine/head ar?

2 set of cam since it is DOHC, not because it is CPS..
they have 2 sets of lobe on 1 camshaft

CPS is considered a VVT system as it varies the valve timing but not continously..
VVTL-i has been phased out due to bad emission it make..

vr agree.... but still disappointed on campro cps.... hope things will improve in later campro cps batch....

since it utilises high cam profile at higher rpm like vtec or mivec, why not make it a little wilder and produce more horsepower??...