4g93 modification advice

Discussion in 'Car Modification' started by Havok_KiD, Aug 22, 2011.

  1. Havok_KiD

    Havok_KiD Senior Member
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    Folks especially the NA Sifu's

    i am currently running a NA 4G93 Doch engine in my ride...

    i just completed my fine tuning and dynoed with a results of 153whp.

    my question is, i am targetting to have a 170 to 180whp being said as a daily drive engine as well

    any advice on the modification i could carry out without wasting on unnesesary stuff

    current mod :

    83mm piston, acl bearing..fully balance - hitting at 20bar preasure
    PnP, 272 matspeed cams , gsr turbo intake bored 70mm with S90 TB
    mivec injectors, 4-2-1 cusco intake
    exedy preasure plate with trinity clutch
    Sard fuel pump with sard fuel regulator
    Management - Microtech Lt10s

    my powerband starts as early as 2k rpm and starts to drop at 7500k Rpm
     
  2. GEFORCEXTREME

    GEFORCEXTREME 5 Year | Silver

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    What pistons are you using?
     
  3. Havok_KiD

    Havok_KiD Senior Member
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    tx3 high comp
     
  4. GEFORCEXTREME

    GEFORCEXTREME 5 Year | Silver

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    Your list of mods seem to be quite extreme so I think you know what you're doing.

    If you want your powerband and peak hp to be higher, you'll need higher more aggresive cams.
     
  5. ehdrian

    ehdrian I Don't Care!
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    wat gb r u using?..
     
  6. Havok_KiD

    Havok_KiD Senior Member
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    haha its a 1.8 jpn gb....end pull of each gears are just awesome.....
     
  7. Zeroed

    Zeroed Senior Member
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    Shouldnt you be getting more than 153whp with those specs? Anyway without going for some serious race cams, you could try:

    4-1 exhaust manifold (maybe Tonnka),
    Skunk2 B-series intake manifold (with adaptor),
    Lightweight Flywheel (Please dont skim the original)
    Under-drive pulleys (They have it in australia I think, otherwise custom)


    The 4-1 exhaust manifold and Skunk2 intake should work well in tandem. To further increase power you're going to need some cams that would suit your engine's breathing systems, but god knows who or which mechanic knows this info...

    If the above hardware matches well though, you should be well within the 170+ range.... I think!


    edit: p.s. IMO, dont get lightweight crank pulleys.
     
  8. DanzEterna

    DanzEterna Moderator
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    zeroed,
    just wondering, those lightweight crank pulleys no good ah? y?
     
  9. TopRpm

    TopRpm Senior Member
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    try putting MIVEC head n MSD ignition..surely can achieve the 180whp goal..since u edi using Lt-10..then management shouldnt be any issue. i've seen many 4g93 reach dat zone:driver:
     
  10. Zeroed

    Zeroed Senior Member
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    Danz, most lightweight crank pulleys dont have full harmonic dampers... even if they do, its often only inserted between half of the pulley and I dont think that really does anything.

    Many have used these pulleys without immediate effects, but who knows lah after 3-4 years down the road. Drivers who like to push their tuned engines hard should avoid these especially, IMO.

    Under-drive pulleys however are generally fine unless you are heavily dependant on that particular accessory, e.g. High end sound system (alternator), old/rusted radiators etc(waterpump).


    ATI - The Dangers of Power Pulleys & Understanding the Harmonic Damper
     
  11. DanzEterna

    DanzEterna Moderator
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    thanks bro for the info....cos i just change to LCP, now sound emitting from the pulley..dunno whether is it the belt or wat....but its kinda irritating...mine does not have the damper.....
    just a normal C&C one....

    ---------- Post added at 04:22 PM ---------- 6 hour anti-bump limit - Previous post was at 04:20 PM ----------

    but according to my mech, there are pros & cons of using LCP,
    one of it is when the LCP fails, it would just pop off.....the simplest way is to get a replacement one, either OEM or
    another LCP. BUt if using OEM CP, when it fails, it will then damage the crankshaft but wont pop off....thats wat happened to me
    the last time before i switch to LCP. dunno whether is it true anot.

    although i gain better pick up, but i loose at top speed....
     
  12. Havok_KiD

    Havok_KiD Senior Member
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    Zeroed,

    well there should be something i am lacking....but i guess i am going for my last resort...

    racing sleeves mate with 83mm super high comp piston with valve pocket done...
    use 308 cams with valve spring, titanium retainers with race hidrolic lifters and coupe it up with Skunk 2 intake since i have S90 already

    changing my header from cusco to Hi tech.. bcoz frankly nothing beats what a Hi tech Race headers can do..

    and to avoid losing sparks at 10k rpm i am gona plunk in COP

     
    #12 Havok_KiD, Aug 24, 2011
    Last edited: Aug 24, 2011
  13. kumar22mostwanted

    kumar22mostwanted Senior Member
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    GILA!!!! the making of an NA champion :adore::adore::adore:
    originally turbo champion but changed sides :thefinger: lol
     
  14. Havok_KiD

    Havok_KiD Senior Member
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    HAHA 5 years with turbo do..and hit my 600whp target already....no wana play with NA n do crazy stuff...learning is always fun


     
  15. C99D-MMC5537

    C99D-MMC5537 Senior Member
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    u rev 10krpm with 4G93 head? huyyo... becareful bro.. the lash adjuster (hydraulic lifter) not very rev-friendly..

    my opinion only.. mayb u got very2 skillful tuner.. :biggrin:
     
  16. ^pomen_GTR^

    ^pomen_GTR^ Senior Member
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    do aftermarket 4g93 got that hydraulic lifter kill kit???

    like jun sr20det lash killer kit....(remove hydraulic lifter and replace with solid type)

    just asking btw :adore:
     
  17. Havok_KiD

    Havok_KiD Senior Member
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    Ha ha bro...10500k RPM is not something new,,, this has been 5 years back technology and to drop your jaws...they run it without sleeves....ha ha

    Tunning plays a secondary when it comes to hardware...u need to know what r u dealing with ....about valve lifters...there are something called Racing solid valve lifters to take the 10k beating or u can use your original lifter and make it solid.

    nothing is not imposible in boleh land bro... is all about how much RM u willing to spend...

    often people say u waste a fortune on NA to get some pony HP...but i am from a high end turbo person diverted to NA.....personal opinion each engine has it's own ways to give u the G-force


     
  18. C99D-MMC5537

    C99D-MMC5537 Senior Member
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    really arr?? i'm very outdate la.. hahaha..
     
  19. fazid88

    fazid88 Senior Member
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    hmm...so based on ur personal opinion, 4g93 best give u the G-force via NA or force induction?


     
  20. kumar22mostwanted

    kumar22mostwanted Senior Member
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    you want G force you need turbo lah the only thing that can come close to providing the G feeling must be big displacement NA
     

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