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CPS (Cam Profile Switching) vs VVTI vs DVVT

Discussion in 'Car Modification' started by GSR06, Feb 26, 2009.

  1. aalto

    aalto Senior Member
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    Some on paper comparisons,

    Manufacturer claim -

    1. Neo CPS - 125hp , 150Nm (DOHC CPS)

    2. Civic SIR (EG6) - 170hp, 152Nm (DOHC VTEC)

    3. Civic Vti (EG4) - 130hp, 138Nm (single cam VTEC)

    Based on paultan dynotest there is a loss of 12% for hp & 14% for torque (Nm)
    So the figures are :

    1. Neo CPS - 110hp , 129Nm

    2. Civic SIR (EG6) - 149.6hp, 134.1Nm (B16A DOHC VTEC)

    3. Civic Vti (EG4) - 114hp, 118Nm (D15B SOHC VTEC)


    So in comparison we can see that the torque difference between a B16a & CPS is not that great around 5-6 Nm difference, but hp of the CPS falls way short of the B16A & even less than the D15B.

    In theory, From these figures I would say in a 3 way drag from a standstill, the CPS can start as equals to the B16A to around 4500rpm but the CPS will fall back at high RPM's & the D15B will eventually catch up to the CPS due to the higher powerband of the D15B. (assuming same weight & gear ratio)

    IMO, the CPS has potential, but in stock form its hp rating isn't that impressive as its even lower than a SOHC VTEC engine. The torque might be on par to the B16A but thats bcoz their both 1.6 L, but the D15B is a 1.5L engine. A normal 1.6 DOHC engine could get the figures of the CPS engine (lets say a 4G92)

    With the use of valve timing mechanism the horsepower rating of the CPS should be around the 140-150hp area to really show off its technology...mind u the comparisons are to a 16 year old Civic!.....

    Maybe it was too costly for proton to achieve reliability with the CPS to achieve higher horsepower ratings....so its really up to the tuners to R&D the CPS so it can be a real contender to VTEC (a least for B16a, its still a long2 journey to K20a territory)

    Just some points to ponder :biggrin:
     
    #321 aalto, Jan 14, 2010
    Last edited: Jan 14, 2010
  2. boyzone

    boyzone Senior Member
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    Since 90 s engine performance is so good ( even though better than today ), why they stop
    to production? Again, this is related with Euro4 emission control.
    Btw, engine output just a refference, u still need to go with power to weight ratio,
    and gear ratio set up.
    By putting in the CPS engine into Satria 1.3 chasis, u will see the different. :biggrin:
    Lotus Elise, just loaded with normal 1.8 DOHC engine, with 140hp. But, capable to clock in 5sec in zero to hundred. :biggrin:
     
  3. estear

    estear From Facebook

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    I think there is*some confusion between CPS and Campro...conceptually, I think CPS and VTEC are the same, however, if we start to compare Campro and say B16A then it starts to make more sense because then we will be talking about cam profiles, cam phasing, EMS/ECU settings, tolerances, etc. that really shapes up the engine characteristics...
     
  4. GSR06

    GSR06 Senior Member
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    In terms of power band, I thought even the standard B16A can tapau the Mivec with rojak 1.8L piston? Anybody can share the experience, let's say 0~400m?
     
  5. aalto

    aalto Senior Member
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    Boyzone
    - I stated it was an on paper comparison (engine to engine) and I stated "in theory" maybe I needed to add same weight,same ratio...ok?, FYI B16a were produced till year 2000, and if its about Euro 4 emissions standards then you'd have to compare CPS to K20 engines. All I'm saying is that the CPS engine is nowhere near the 100hp/L standard for stock performance NA engine & it needs improvements in stock form. Maybe a better comparison would be with the swift sport, 1.6 VVT - 125hp, 148 Nm...:biggrin::wavey:

    Estear - why does it make more sense to compare B16a with campro?....i dont understand...
     
  6. estear

    estear From Facebook

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    My point is, CPS & VTEC does basically the same thing. What's different is the engines they are installed to. If Campro would've been installed with a VTEC mechanism instead of CPS, I can't imagine the performance would vary much, likewise if B16A be installed with CPS instead of VTEC. So IMHO, the comparisons are really about the engines, not the cam switching technology...
     
  7. boyzone

    boyzone Senior Member
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    This could be one of the business plan,
    u see:

    1gen : Campro
    facelift : CPS with 125ps
    facelife again : CPS with 140ps
    special edition : CPS with 160ps
    etc ...
     
  8. aalto

    aalto Senior Member
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    I hope your right about the business plan....I would really like to see a stock Proton engine make 100hp/L ...:biggrin:

    Remember long ago..., petronas developed the EO1 engine? 2.0 VVT 200+ Hp (if i'm not mistaken)....I always wondered why proton doesn't want to use it....:confused:
     
  9. BLANk

    BLANk Senior Member
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    regarding the petronas E01 engine...actually,its a toyota 2ZZ-GE engine...:biggrin:
     
    #329 BLANk, Jan 14, 2010
    Last edited: Jan 14, 2010
  10. dizazter_rs

    dizazter_rs Senior Member
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    i newly owned neo cps..but now already do RD for it.Mivec injector,works fuel regulator+cam pulley, re-grind cam at mat speed,NS perfomance LSD,racing clutch(5p),walbro fuelpump,racing plug+cable, custom exzos system n haltech e6k..bhp?still dont know yet..car still in progress..i tell u guys later ok :)
     
  11. GSR06

    GSR06 Senior Member
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    It sounds interesting and pls keep us posted on your progress. What is the bhp before modification? What is the overall cost....?
     
  12. boyzone

    boyzone Senior Member
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    Besides haltech, what piggyback / standalone can use?
     
  13. GSR06

    GSR06 Senior Member
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    If your prediction is correct, it will happen every 2 years then. More bhp means more $$$ is needed :proud:
     
  14. boyzone

    boyzone Senior Member
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    Then we will wait for facelift... again and again. After 10 yrs still waiting for ultimate version :biggrin:
     
  15. GSR06

    GSR06 Senior Member
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    yeah right:biggrin: Can only facelift for once ...maybe after 10years, no more CPS already and I am always looking for the turbocharged or supercharged series...
     
  16. hachiroku clan

    hachiroku clan Senior Member
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    Right now proton is going towards turbo already.. CPS+turbo how? I know vtec+turbo is interesting but cps? Must wait n seeeeee..
     
  17. GSR06

    GSR06 Senior Member
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    Yeah, heard of it since last year but any news lately? I heard the bhp would be around 150...good enough for daily driving.

    ---------- Post added at 07:33 AM ---------- 6 hour anti-bump limit - Previous post was at 07:25 AM ----------

    G2CBRUNEI: Proton Campro turbo engine by 2010-2011

    Interesting but the piping looks like....something la... don't know how to comment.
     
    #337 GSR06, Jan 15, 2010
    Last edited: Jan 15, 2010
  18. sphiroth

    sphiroth Senior Member
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    safcii.
     
  19. hachiroku clan

    hachiroku clan Senior Member
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    i read the article, and my favourite part is when it says "will be creating a small competitive car".. Thats the 1st time i hear this rumours.. Hope its good tho..
     
  20. boyzone

    boyzone Senior Member
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    I think will load into Exora first.
     

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