4-2-1? 4-1? Extractors broken down!

Discussion in 'News and Features' started by Izso, Oct 24, 2011.

  1. monsh

    monsh 5 Year | Silver

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    i got a question .
    lets say if i were to get muffler and mid box with inlet size 2.1" ID, is it ok to use pipe size 1.8" ID because i dont want to lose much on the low end power.

    and also to maintain fuel consumption rate .
     
  2. wan_k278

    wan_k278 5 Year | Silver

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    guys, currently, i am owned sentra n16..last week, i went to Exhaust Workshop at Sunway (I forgot shop name).. the mechanic advise me to change stainless steel extractor 4-2-1 but now OEM is 4-1..in my daily travel, all the way from shah alam to KL and Putrajaya..some use highway and some on city road..and yet, I maintain to change gear at 2,500 - 3,000 RPM because of maintain FC and want to get a pickup..but sometimes, I'll rive up my pedal and gain 4,000 - 5,000 RPM went to take slow car in fornt of me and by the time "kena cucuk"..my question is,what types of extractor do I need to change..?? i love my car now on pickup..but any sugesstion from u guys..please shares with me..tq.
     
  3. aHLengChai

    aHLengChai Senior Member
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    change my waja 4g18 manual exhaust system.. stock was 4-1 with catalytic blablabla muffler staandart bla bla to zenden 4-2-1 + zenden twister center bullet + supermegaphone sflow.. currently lose alil bit pickup from standart setting.. but saving more fuel.. haha :rolleyes:

    should i change the muffler to straight flow?
     
  4. Zanskie

    Zanskie New Member

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    damn. very good thread. in depth discussion by the pros... :congrats::congrats:

    worthy thread bump!! :P
     
  5. =..=

    =..= Senior Member
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    guys,

    my car is standard neo (non cps).

    proton is selling extractor for neo cps. if i use this would it be beneficial?

    [​IMG]
     
  6. gunnerzz

    gunnerzz 5 Year | Silver

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    Not much gain but it makes thebpower comes abit more early.

    Damn..that 15 inch rim is cheap....
     
  7. =..=

    =..= Senior Member
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    yeah those rims quite cheap, last time checked with proton 6.5kg/piece.

    the extractor stated there is for cps so i guess it was 'designed' for the cps engine maybe will not ngam abit with my engine.

    would this r3 extractor be better suited for my non cps satria neo or any other aftermarket brand.?
     
  8. gunnerzz

    gunnerzz 5 Year | Silver

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    i think not suitable with normal campro lah.
    there are some high end brand such as supercircuit or hotbits.
    these item can be sold with little price drop onve u want to sell the car.

    normal affordable are like jasma.

    u can go with no brand but it will be a gamble.some do last long and have same performance with branded one.
    most of my friend runs on cheap white steel extractor and seems to last long.
     
  9. stupidcar

    stupidcar 5 Year | Silver

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    CPS is CPS, IAFM got IAFM, IAFM+ got IAFM+, Campro normal got campro normal(uses non-COP).
     
  10. #OGPIM

    #OGPIM Member

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    Hi

    Im a newbie. Just started tuning my Satria 4G92.
    Im into Touge ( not really it straight road drag ).
    Which sort of extractor suits my style the most.

    Hope to hear from you real soon.
     
  11. sanekit

    sanekit Well-Known Member

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    To quote Izso's post:

    GRAPH 1) Typical gain from a 4-2-1 and a 4-1 compared to standard.
    [​IMG]
    **go google the relationship between power and torque

    A typical 4-2-1 makes good gain from low-mid rev range to rev cut, without losing the low range.
    A typical 4-1 makes huge gain from mid rev range to cut, but losing the low range slightly.

    GRAPH 2) Typical revolution vs velocity relation for a 5-speed manual transmission
    [​IMG]
    **revolution is RPM lah...
    **velocity is speed lor....
    **applicable for automatic transmission too


    Now, check Graph 2, compare that to your driving style, see which rev range you use most (in normal driving, highway cruising, and sprint). Then compare that with Graph 1, see which type of extractor suits you.

    I would say best is this:

    Situation B:
    You drive the car in town with traffic and you shift at 4k rpm max. You will need a 4-2-1 because you will be using the low to mid range most. The loss in zone A from a typical 4-1 will make your car more lethargic to drive at low speed with high gear ratios.
     
  12. Izso

    Izso Boooooossst
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    Thanks Sanekit. You've pretty much covered it all.

    And it also boils down to your driving style.
     
  13. RENESIS VIII

    RENESIS VIII Senior Member
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    Take 4-2-1. I've changed to 4-2-1 few months ago and I'm quite happy with the results. Improvements without any downsides.
     
  14. LittleWhiteWagon

    LittleWhiteWagon Senior Member
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    Bro for your 92 you're spoiled with a few choices of 4-2-1's on the market. The points of where the pipes sambung will change the feel of your engine.

    But if you're lazy to kira2 or chase power just go buy some 'kedai kuning' 4-2-1. They all make power, it's just when in the powerband it makes power and how much.
     
  15. LittleWhiteWagon

    LittleWhiteWagon Senior Member
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    What sort of extractors would perform worse than a stock log manifold? :rofl: You go for 4-1 also it'll make power.
     
  16. RENESIS VIII

    RENESIS VIII Senior Member
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    Well, in many mods, there are always ups and downs to it. Like you gain top end but lose low end. Gain power, lose in fuel consumption. For my extractor mod, initially before I change it, I was a bit worried if there is any downside to it or not but seems like there is none.
     
  17. LittleWhiteWagon

    LittleWhiteWagon Senior Member
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    Really? What sort of bolt on modifications gain power but affect your fuel consumption badly? :hmmmm:
     
  18. RENESIS VIII

    RENESIS VIII Senior Member
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    Changing camshaft maybe?
     
  19. sanekit

    sanekit Well-Known Member

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    DIY hand porting and polishing with no idea and no proper measuring method. :rofl:
     
  20. vr2turbo

    vr2turbo 5 Year | Silver
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    Change extractor, got power, so foot become heavy only......lol
     

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