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honda sm4 F20A DOHC's problem

Discussion in 'Honda' started by skf, Jun 28, 2006.

  1. skf

    skf Senior Member
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    When driving the car , u slow down the car speed and try reaccelerated the speed suddenly the car engine since to loss power and suddenly repower again. What is the problem? Plug,distributor ,plug cable all check still can no be solved :confused_smile: :confused_smile:
     
  2. skf

    skf Senior Member
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    bump `````````````````
     
  3. ahchi

    ahchi Senior Member
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    Well, actually mine is having the same problem as yours, I've been asking some mechanics and there say that it's normal, some say that certain benz model is the same too because this is kind of like safety function, especially when you are driving >80km/h, pervent from sudden speed up can reduce the risk of accident.
    However, one thing I'm not convince is this speed retard not always happen and sometimes it's so obviouse and sometimes don't. So, I do think that there should be something not right, just can't find someone can properly point it out and since it's not something harmful to the engine so I just ignore it all the while.
     
  4. mrbear

    mrbear Senior Member
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    best is change to H22A. problem settled. auto h/cut for H22A around 2.8k .. manual around 4k+
     
  5. civicefthree

    civicefthree Senior Member
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    I think its a common prob for F20A engine......my dad's SM4 also when want to accelerate a bit slow and then gain power....the low end power is a bit dull becuase of it no Vtec.....but when u maintained middle n high end rpm....it is ok then....manyak kuat wooo.... :shades_smile:
     
  6. ahchi

    ahchi Senior Member
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    I'm not quite agree with it, the SM4 F20A is good in low end power & pickup, theoretially there's no difference with any vtec engine becasue vtec power only kick in during high rpm. Don't forget that F20A twincam having 150 bhp, it should be the same as common H22A (non type R) engine, which is rating 150 bhp too, just the different between these two is the vtec only.
     
  7. mrbear

    mrbear Senior Member
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    * FYI .. as u said F20A twincam having 150HP. is it on engine HP or on wheel HP? i dont think stock F20A twincam having 150HP on wheel.

    * FYI .. stock H22A is rated from 190HP-200HP-220HP. That is on engine HP. stock ON WHEEL HP on H22A is rated from 165-175HP (on AUTO). Manual should be more.

    as what u said F20A is rated at 150HP,its the HP on engine and on wheel HP is only not more than 100HP or less than that.

    dont forget that there is F20B Dohc VTEC (blue top cover). its also powerful,but more people go for H22A rather than F20B.

    F20A VS H22A = u said that "vtec only the differences,with the same 150HP"? i dont think so dude. if F20A is more powerful than H22A,all those guys would crazy to go n use F20A rather than using H22A dude! :mouth_closed:

    F20A Spec:

    Honda F20A Engine JDM
    Displacement (cc): 1997
    Power (bhp@rpm):150 @ 6,100 rpm
    Torque (ft/lbs@rpm): 137 @ 5,000 rpm
    Compression Ratio: 9.5:1


    H22A spec:
    2.157cc (2.2L) DOHC VTEC
    10.6 Compression Ratio

    H22A ver 1 2156cc DOHC VTEC, 190ps
    H22A ver 2 2156cc DOHC VTEC, 200ps
    H22A SpecS 2156cc DOHC VTEC, 220ps

    F20B spec:
    F20B SOHC 1997cc SOHC VTEC, 145ps(LEV)/148ps(4WD)/150ps
    F20B DOHC-1 1997cc DOHC VTEC, 180ps
    F20B DOHC-2 1997cc DOHC VTEC, 200ps





    please proof to me that im wrong. waiting for ur answer :shades_smile:
     
    #7 mrbear, Jul 2, 2006
    Last edited: Jul 2, 2006
  8. civicefthree

    civicefthree Senior Member
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    but F20A is also powerful.....i've tested it with a BMW on da highway....180 is easy to get....also can tinggal the 320 BMW....hehehe
     
  9. saiyuke

    saiyuke Senior Member
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    bear taiko,

    For Stock H22A ( all stock ar), the WHP is only around 140~150hp only. Coz last time i went dyno, was surprise to see this result and as you can see, Lets say the HP is 190hp and after loses from flywheel down to the tire, the hp that remain is approximately 190hp - (25~30%) loses will be your approximately whp.

    For manual, then the loses is only around 10~15% only.

    Correct me if i am wrong.
     
  10. mrbear

    mrbear Senior Member
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    * if stock rated H22A on wheel is around 140HP-150HP = then its ok la.. compared to F20A that guy saying is 150HP. so better F20A than H22A? .. might be engine of F20A is rated 150HP by engine.. not on wheel HP. should be lesser than 100HP or less.

    * it depends on H22A engine. some stock on wheel HP for H22A is rated 160HP. due to old engine. pistons,cyclinder,piston rings, cams,carbons deposits,due make the engine loss its HP on wheel. if stock on wheel H22A getting 140HP-150HP it might due to the internal parts that are old.

    H22A stock WHP reviews:

    JDM H22A 2.2L 2157cc DOHC VTEC 16 valve motor. 184 whp at 6900 rpm and 158 ft lb. torque at 3200 rpm. About 220 hp to the flywheel. (mod just aluminium intake pipe + filter + 421 extractor)
     
    #10 mrbear, Jul 2, 2006
    Last edited: Jul 2, 2006
  11. mrbear

    mrbear Senior Member
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    H22A Engine 230+WHP

    H22A 2.2L VTEC Engine:
    R&D 5-Axis CNC Ported Head
    Skunk2 Stage II Camshafts
    Portflow Valve Springs
    Portflow Ti Retainers
    STR Adjustable Cam Gears
    Euro R Block w/ 11.0:1 Compression Pistons
    Euro R Intake Manifold Portmatched to Head and TB by R&D
    MaxBore Throttle 64mm Throttle Body
    H23A Manual Tensioner Conversion

    Drivetrain:
    M2B4 Honda LSD Transmission
    ACT Clutch 6 Puck
    ACT ProStreet Flywheel (12lbs)

    Performance Bolt-Ons:
    Injen Race Division Cold Air Intake
    HyTech 4-2-1 Race Header
    Custom 2.5” Exhaust System

    Fuel & Ignition System:
    Hondata S200 w/ Datalogging & Launch Control
    NGK BKR7E-11 Spark Plugs
    NGK Spark Plug Wires
    SX Engineering Fuel Pressure Regulator

    Cooling:
    Radiator Doctor Aluminum Single Core Radiator w/ Custom Rigged Thin Fan
    Fairly New OEM Thermostat & Hoses
    High Performance Brakes:
    Brembo Steel Braided Brake Lines
    Brembo Rotors
    PBR/Axxis Brake Pads
     
  12. saiyuke

    saiyuke Senior Member
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    Alamak, my old engine liao! kekekeke:embaressed_smile: :embaressed_smile: :embaressed_smile:

    SO keng or not? kekekekeke
     
  13. mrbear

    mrbear Senior Member
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    vROOMMMMMMMMM cinggggg..
     
  14. darkemperor

    darkemperor 15 Year | Platinum

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    i've used the f20a too before with a manual trans...what can i compare between both f20a and h22a is :

    1. f20a good lower end torque...but h22a also has it with 156cc more...dont look down just because it's a dohc.....
    2. dohc....better mid to high end...sohc will choke out of breath at this level if we suddenly push it or need immediate accel..
    3. vtec....the wild cam really makes differents....people wont be spending up to rm7k just for nothing to get a h22a...and i better endup using my f20a forever...:X-:

    f20a sohc if i'm not mistaken only rated at 130hp....are you refering to the dohc..?
     
  15. skf

    skf Senior Member
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    u all r misunderstood my question (sorry my english is poor )
    Lose power which i mean is like want mati engine
     
  16. darkemperor

    darkemperor 15 Year | Platinum

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    something related to ignition, electrical or fuel problem.....take to a good mech and check everything....
     
  17. skf

    skf Senior Member
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    already change distributor , fuel pump , fuel filter,relay ~~~~~~~~`:confused_smile:
     
  18. darkemperor

    darkemperor 15 Year | Platinum

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    check engine light on?
     
  19. skf

    skf Senior Member
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    no:sad_smile:
     
  20. mrbear

    mrbear Senior Member
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    change engine?
     

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