What is it with Proton? Why so many name? We have the Waja CPS, Persona with IAFM. SO which is which? I know that CPS is Cam Profile Switching..but the rest?
Why so many names?then what about the previous generation Waja Campro? or GEN-2 Campro?

campur
maCampro

yeah i wonder why too?

Because simply its -----> Buatan MALAYSIA?

Malaysian like buzz word, eg VVT-i, DVVT, VTEC, IAFM, CPS, lol.

IAFM mean what?

Here you go..

http://www.proton.com/innovation/rnd/campro.php

IAFM = ! M Fat Man

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

Thats why they doesn't mention Campro CPS, just CPS. Even the emblem at the boot also just CPS 1.6.



To be fair, the hp in CPS is low than the older VTEC engine, some are contributed by complying with Euro-4 standard (something about polution etc... ).

technology followed far from behind the century eh?

Whoops. I stand corrected, thanks.

from the 80s

What to do.. Even CPS they got from Lotus, if develop from scratch..



Maybe they want to drop the name 'Campro' becoz it already have bad reputation..

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

Same with Waja, but Campro is not mention in car registration..

then what is in the registration?

campur?
o maCAMPRO ?
hehe

CPS 1.6 only.

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??

I prefer changing the hi-cam to a higher one. Can save petrol if kept revving under 4k rpm.



I think its possible.

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

CPS has 2 set of cam, once hit 3.8rpm, it will change to high-cam.

u can't compare with an old generation engine. new engine has stricter rules on emissions etc etc.

try compare the CPS 1.6 with Toyota Altis VVT-i 1.6 or Suzuki Swift Sport VVT 1.6. that's the closest that i can compare.

CPS is leading in that comparison theoretically.

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....

Campro is the engine family. They're phasing out the normal Campro and are now offering it in two flavours.

1) Campro IAFM - think Honda i-DSI
2) Campro CPS - think Honda VTEC

---

Added on April 8, 2008, 6:46 am

I think there's not much engine block to bore it already unfortunately

The 2nd cam in CPS is not as 'wild' as VTEC and it also engage early (3.8k) compared to VTEC.

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?

can install CPS or IAFM to older CamPro engine? How much the cost?

CPS got two profile cam (low lift and high lift)... As long as keep revving before the activation point, it still use low lift, thus normal FC.

B16A is useless below 5000rpm even with B20B block but after that .....
For drivability and fuel economy I think CPS is better.

And if so the CPS is better, how come the redline is still at 6500RPM (same as 2002 Waja). I thought it can rev higher?

The actual red line is 7200 rpm (rev cut). Try for yourself la....

CPS = cannot perform smoothly

It's quite smooth actually... have u actually driven one before?

As mentioned earlier, in THEORY, it can outperform VVT-i and those. Anyone tested yet?

noler

IAFM is about variable length intake manifold... something like VIM, but controlled mechanically.... totally different with i-dsi.... i-dsi utilises 2 sparkplug at each cylinder.... they fires in sequence for good fuel saving or fires together for better power.... it is controlled by car onboard ecu....


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


nope... think CPS as something like vtec.... they have similar number of camshaft with any other engine.... but normal engines have 1 cam lobe per valve.... but cps/vtec has 2 different cam lobes on 1 valve... when cps/vtec activates, a solenoid activates and slides a rod to connect both cam profile rocker arm together and thus, the valves play according to the higher cam lobe/profile...

understand??..


can.... get complete set cylinder head and intake manifold with wiring and ecu all together and fit into ur existing campro...


ehh wait... does normal campro has the same cylinder block as the new campro cps??...

should be as proton is fitting it in all cars in stages

already tested the new saga / gen2 and waja cps. helping my friend to decide either on gen2 or waja.
compare with the campro without cps, the one with cps has better and smoother ride.
and most of all, better low end torque distribution.
no more auto revs / jerking

Gen2 or waja? why no persona or waja? more comparison..

quoted for pure win and gold status.

VIM cover the torque dip I thinks. Because CPS open earlier than VTEC, it cannot use a wild cam like VTEC. A high lift cam would only give optimum power a high RPM. The higher the RPM, the higher lift is better. VTEC open at 7k (if not mistaken), thus it can utilize higher cam than CPS. High cam (high lift) is useless in low RPM. This is what I understand about cam profile system. Pls correct me if I'm wrong.

CPS is for volumetric efficiency for the engine due to the inertia of the petrol + oxygen mixture entering the combustion chamber..

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?

for b series...vtec open at 5800 rpm till rev cut and close down at 5500 rpm...

Dont know much bout VTEC, but isn't 5k is too low, even MIVEC open at 5.5k..

Donno what ecu CPS are using, how to know?

I also hope R3 would try to experiment regrind the lobe, which I think is possible ... But how to change the activation point?



VIM are commonly mistaken because CPS and VIM both are usually referred as CPS only..

Put new ecu or piggyback?
Find vafc....woops....find cafc .
Haha.

from what i understand through readings from proton website & learnings..

what actually happend when we suddenly ram the accel pad is,
1st, more air come in,
2nd, due to bernoulli principle, the air 'drives' the fuel to come out from inside a venturi tube alike..
3rd, they mix together and enter inlet manifold...

this whole process takes time..
sometimes, in sudden accel, more air come..
the air flow cannot drive fuel to go out the venturi instantly...
thus, creating a weak mixture to be burned in combustion chamber...
oh yeah, it lags just milisecond, maybe microseconds..
but, the impact to the engine performance is tremendous...

so, they introduces the IAFM...
IAFM is all about adjustment made at inlet manifold..
it 'injects' fuel at the same proportion as the amount of air entering..
thus, creating a stable (same fuel-air mixture proportion) entering inlet manifold..

so, it helps reduce in 'power lagging' when we sudden ram the accelerator pedal..
and yes, it is due to inertia principle.

but, due to the same fuel-air proportion entering the combustion chamber, it does not help in increasing the horsepower.. it just able to give instant power..

however, at the inlet valve...
the mixture still have problem to enter the combustion chamber.. yeah, again it is due to inertia..
the mixture does not have sufficient time to enter combustion chamber bcoz the valve open and close at a very high speed... the time interval is so damn small..

so they introduce the CPS..

CPS is the adjustment of the cam, so that the inlet valve opens more, or longer, to let more air come in and more used air go out at high rev., to reduce error due to mixture inertia... how? by increasing the valve stroke length..

more mixture DOES enter the combustion chamber...
more used mixture DOES goes out from the combustion chamber to the exhaust..
in other words, the engine have more volumetric efficiency...

so, it does gives more horse power..

however, it does not disturbs the otto cycle opening (leading) and closing (lagging) degree..
nah~~ im not going into otto cycle anyway..

anyway...here some quotes from proton website..