btw, rebore the campro block and fit bigger bore piston to increase the displacement lor....
IAFM, CPS, CamPro, All Discussions here.
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 Apr 7 2008, 11:47 PM
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#1
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10,975 posts Joined: Jan 2003 From: disini disana  
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Apr 8 2008, 04:43 AM
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#2
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(sphiroth @ Apr 7 2008, 11:54 PM) I prefer changing the hi-cam to a higher one. Can save petrol if kept revving under 4k rpm. change to highcam can save petrol??..  I think its possible.   QUOTE(sphiroth @ Apr 7 2008, 11:59 PM) CPS has 2 set of cam, once hit 3.8rpm, it will change to high-cam. 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....  |
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Apr 8 2008, 12:19 PM
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#3
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(paultantk @ Apr 8 2008, 06:45 AM) Campro is the engine family. They're phasing out the normal Campro and are now offering it in two flavours. noler 1) Campro IAFM - think Honda i-DSI 2) Campro CPS - think Honda VTEC 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.... QUOTE(sphiroth @ Apr 8 2008, 07:16 AM) The 2nd cam in CPS is not as 'wild' as VTEC and it also engage early (3.8k) compared to VTEC. then whats the use of cps leh??... jz to cover the torque dip in the dyno chart??.. QUOTE(farique @ Apr 8 2008, 07:47 AM) seriously, this is the first time I heard such thing as installing high cam can save petrol. 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... 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? understand??..  QUOTE(kulaan @ Apr 8 2008, 08:48 AM) can install CPS or IAFM to older CamPro engine? How much the cost? 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??... |
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Apr 8 2008, 03:34 PM
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#4
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(sphiroth @ Apr 8 2008, 01:34 PM) 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. 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...  QUOTE(WisePrince @ Apr 8 2008, 01:41 PM) CPS is for volumetric efficiency for the engine due to the inertia of the petrol + oxygen mixture entering the combustion chamber.. u've mistaken VIM for CPS ler... |
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Apr 8 2008, 08:57 PM
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#5
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(WisePrince @ Apr 8 2008, 05:07 PM) owh.. really ar? hehe.. y ar? so, what is VIM and what is CPS? VIM = variable intake manifoldat the intake manifold of the engine, it has 2 separate path for air/fuel to enter.... 1 is longer, another one is shorter.... when to use which one??... well, longer one is used during light throttle or cruising.... longer intake manifold path allows air and fuel to mix properly prior to combustion... besides, long intake path induces certain amount of backpressure, which is good for low end torque, especially for auto tranny cars... shorter intake manifold path is used during heavy/full throttle... shorter path means air/fuel able to reach the combustion chamber faster.... thus, more power at high rpm range..... what about IAFM??... its basically the same with VIM... the only difference is VIM is activated electronically while IAFM is activated via vacuum hose (mechanically).... CPS is as i said before, similar with vtec/mivec technology.... the camshaft has 2 separate cam profile per valve.... 1 is normal street cam, another is highcams.... below a certain rpm activation point, it runs on standard cam profile.... pass that activation point, it switches to higher cam profile lobe, which will induce more power..... 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..... QUOTE(sphiroth @ Apr 8 2008, 05:19 PM) I also hope R3 would try to experiment regrind the lobe, which I think is possible err.... by manipulating the ecu mayb??... as far as i know, vtec has a vtec controller which controls which rpm to activate the rpm... not sure if proton/R3 will create some sort of gadget for CPS or not.... ... But how to change the activation point? VIM are commonly mistaken because CPS and VIM both are usually referred as CPS only..  wait, i dont think it is necessary since there isnt any significant switchover between both cam profile... haha... QUOTE(sphiroth @ Apr 8 2008, 07:39 PM) I don't think at low rev CPS can perform as efficient as VVT system as the latter varies the timing across the RPM range. But the best I think is i-Vtec where the lift is varies across the RPM range and VVT-L system (variable valve timing + lift) . 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.... |
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Apr 8 2008, 09:25 PM
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#6
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(rcracer @ Apr 8 2008, 09:07 PM) Why do you say IAFM and CPS fails? doesn't that mean that VTEC also fails and all the earlier variable intake manifold fails? okla... dont say it fail la... say it incomplete.... isnt outstanding.... It's not fail it's applied differently not according to what you like that's all. I keep seeing paper figures being quoted here. VTEC as fun as it may be only lasts what? 3 seconds in 3rd gear before you hit the redline? I'm sure if proton made it as aggressive as VTEC, there will be people saying 'whatlah same only have to rev high' vtec engines took years and millions of money to improve its technology... we'll see how cps will fair in the future...  QUOTE(sphiroth @ Apr 8 2008, 09:11 PM) I dont think VIM/IAFM phailed since it removed the torque dip in Campro. I also don't think CPS phailed although it maybe not as great as VTEC. At least it allows me to get 0-100km/h approx at 10sec and to 175km/h in 35sec without any modification. yea... jz like malaysia football.... didnt lose 10-0 consider ok lor.... lost 2-0 considered win as well...  |
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Apr 8 2008, 11:14 PM
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#7
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(Max @ Apr 8 2008, 09:45 PM) how the cps operate? cps operates like vtec... wanna know how vtec operates??... watch this..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? technology is the same... but design might be slightly different.... thats why CPS is called cam profile switching... it switches to higher cam profile at certain rpm.... QUOTE(imperialrealcs @ Apr 8 2008, 10:30 PM) im using MIVEC auto and i can easily 140km/h without switching the second lobe my car also can hit 140kmh without any mivec/vtec/cps/vvt/dvvt/vvti larr... 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..  CPS is not VVT ler.... VVT is variable valve timing... it varies the valve timing continuously according to driving condition.... CPS, as i said, switches cam profile like how mivec does.... |
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Apr 8 2008, 11:18 PM
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#8
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(mTk @ Apr 8 2008, 11:11 PM) Those who say that CPS "fails" because the high-lift cam isn't as powerful as Japanese engines like B16A, please consider this: vr agree.... but still disappointed on campro cps.... hope things will improve in later campro cps batch.... Why is the Toyota Altis 1.6 with VVT-i have even less horsepower than the plain non-CPS Campro engine? Same goes to Nissan's 1.6 engine. Engines today are not just all about power. It's also balancing fuel economy and emissions, as well as drivability (low-end torque). I have absolutely nothing against Honda engines. My dream car (realistically) is still either a 4th-gen Honda Prelude or the mid-90's Accord with a H22 engine swap. The CPS principle works very similar to the old VTEC engines, by having 2 sets of cam lobes. However, they are not as "wild" compared to engines like B16A. Yes, it's an old tech compared to the continuous variable valve timing that VVT-i and i-VTEC has. The VIM and IAFM principle both works similarly by altering the length of the intake manifold. This helps mix the air and fuel better. The difference is that VIM is electronically operated and IAFM is vacuum-operated, if I'm not mistaken. Again, this tech isn't very new, though it definitely helps the Campro engine. Added on April 8, 2008, 11:20 pm QUOTE(mTk @ Apr 8 2008, 11:18 PM) The different cam profile causes the valve timing to be different, so yes, CPS does vary the valve timing. You said CPS works like VTEC what. I thought VTEC = Valve Timing Electronic Control? VTEC = Valve Timing Electronic Control ??  http://en.wikipedia.org/wiki/VTEC This post has been edited by the_catacombs: Apr 8 2008, 11:20 PM |
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Apr 8 2008, 11:29 PM
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#9
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(mTk @ Apr 8 2008, 11:26 PM) OK, Variable Valve Timing and Lift Electronic Control then. Still, my same point remains. VTEC = variable valve timing. Just not as continuous and advanced as today's stuff like i-VTEC, VANOS and VVT-i of coz.... i-vtec is more advance compare to vtec.... because got 'i' mah.... |
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Apr 8 2008, 11:41 PM
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#10
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(sphiroth @ Apr 8 2008, 11:36 PM) Care to clarify? since it utilises high cam profile at higher rpm like vtec or mivec, why not make it a little wilder and produce more horsepower??... |
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Apr 9 2008, 10:21 PM
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#11
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(ericmaxman @ Apr 9 2008, 10:18 PM) So bascily the CPS should be in manual gear? auto cannot? auto tranny also can geh.... mivec n vtec also has variant in auto tranny.... |
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Apr 9 2008, 10:55 PM
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#12
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(kcng @ Apr 9 2008, 10:52 PM) as the saying goes, real man drive manual so u mean got kukujiao drive manual??.... (dun really hold water nowadays with the introduction of DSG etc) |
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Apr 14 2008, 05:45 PM
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#13
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(imperialrealcs @ Apr 10 2008, 12:18 PM) hold the gear using the 'OD' button instead.. but as far as i concern, CPS is using 3-2-L configuration.. campro cps has 4 speed auto gearbox??...QUOTE(sphiroth @ Apr 10 2008, 12:44 PM) Use MT lar.. Can 'hold' any gear you want.. QUOTE(ericmaxman @ Apr 11 2008, 08:39 AM) So, the so called CamPro Waja...what Campro does it have? part of CPS? part of IAFM? or just the stupid logo? read back previous posts to learn more about cps and iafm lar.... ask n ask again not bored meh??... ps, not to be confused with the recently launched CPS waja..the one i'm talking about a generation earlier QUOTE(ahkau @ Apr 14 2008, 05:13 PM) wah .. 0-100km/h in 10s .. honda crx 1st gen (1.5L carb) can do that as well |
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Apr 14 2008, 06:02 PM
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#14
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(sphiroth @ Apr 14 2008, 05:53 PM) The AT only has 4 gears...thats why I choose MT. MT ftw~!!!!  Some people just doesn't bother to read even in a forum.  |
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Apr 16 2008, 07:53 PM
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#15
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(bizzy @ Apr 16 2008, 03:40 PM) haha i think sure got little bit improve but . REAL abit suchs as like 1 to 3 hp with those 400Rm above i think is not worth it. QUOTE(AllFoodsCanEat @ Apr 16 2008, 07:47 PM) Omg... Post wrong... |
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Aug 4 2008, 01:37 PM
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#16
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Senior Member
10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(ericmaxman @ Aug 4 2008, 08:03 AM) I did hear some news about some guy's Campro disintegrated. As far as I can tell, this should not happen under normal circumstances, right? yeap.... the crank sensor misalligned, causing damage to the target wheel... the whole target wheel disintegrated inside the engine, causing the crankshaft to break into 2.... QUOTE(squareballs @ Aug 4 2008, 08:53 AM) I was rushing home for badminton yesterday, and i trashed my campro like mad..Seriously cannot feel the umph..Tekan den after 1-2 sec only pecut. its normal... proton tuned it to allow the throttle body open progressively even how violent u step on the pedal.... |
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Aug 4 2008, 02:35 PM
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#17
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(ericmaxman @ Aug 4 2008, 01:48 PM) I did go through the website. But I don't undersatnd how did it happen. Can elaborate more? i wasnt clear as well.... but i guess its the cranksensor misalligned... causing it to hit the target wheel.... the target wheel broke into half, causing a whole lot of mess inside.... and in the routine, jammed the movement of the crankshaft, causing the crankshaft to break into 2.... |
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Aug 4 2008, 05:38 PM
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#18
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(ericmaxman @ Aug 4 2008, 03:32 PM) Quite complicated yea... me too... how can the cranksensor sudently misalligned.... and how the target wheel can damage the whole crankshaft... and how the hell the strongest part of the engine, crankshaft, can break into 2... |
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Aug 29 2008, 12:25 PM
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#19
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(zacevox @ Aug 29 2008, 07:39 AM) pwned... |
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Aug 30 2008, 12:09 AM
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#20
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10,975 posts Joined: Jan 2003 From: disini disana
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QUOTE(farghmee @ Aug 29 2008, 03:41 PM) reading thru this thread, is it correct that: vtec/cps/mivec system is more towards increasing the lift of the valve at certain rpm by switching to the higher cam profile...*both VTEC & VVT need to open valve for mixture to flow thru? *the main difference is the way to open the valve; VTEC(mechanical) & VVT(electronic)? i dunno much... about the campro, i always drive the non-cps campro auto. if i want to feel the acceleration, i choose the 3rd gear rather than D. then slam the accelerator  while vvt is variable valve timing... it switches the cams advance or retard according to load of the engine... both also controlled by electronics... |
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