header

Discussion in 'Engine/Drivetrain' started by low_toyota92, Dec 10, 2010.

Page 1 of 2
  1. low_toyota92

    low_toyota92 Enthusiast

    Joined:
    May 20, 2009
    Messages:
    149
    Likes Received:
    1
    Location:
    Nashville, N.C.
    Truck:
    92 ex cab
    low_toyota92, Dec 10, 2010
    #1
  3. low_toyota92

    low_toyota92 Enthusiast

    Joined:
    May 20, 2009
    Messages:
    149
    Likes Received:
    1
    Location:
    Nashville, N.C.
    Truck:
    92 ex cab
    anybody??
     
    low_toyota92, Dec 11, 2010
    #2
  4. kamesama980

    kamesama980 Addict

    Joined:
    Jun 28, 2010
    Messages:
    511
    Likes Received:
    1
    Location:
    Columbus, IN
    Truck:
    91 Base
    they're all over ebay. haven't heard much.
    short-tube 4-1 great for top end, bad for low end/powerband width.
    O2 sensor reading 1 cylinder=fail
     
    kamesama980, Dec 13, 2010
    #3
  5. IronNam

    IronNam Grand Toyotaholic

    Joined:
    Sep 11, 2008
    Messages:
    6,960
    Likes Received:
    14
    Location:
    Kansas -> NorCal
    Truck:
    94 XCab
    put it this way, Long tubes will give overall power and torque improvement, all the way to the top. More smoother power delivery than a motor with short tubes.

    and yes, 02 sensor reading #1 cyl = fail.


    could you find Doug Thorleys? better than those
     
    IronNam, Dec 13, 2010
    #4
  6. toylowta

    toylowta Enthusiast

    Joined:
    Jul 30, 2010
    Messages:
    255
    Likes Received:
    0
    Location:
    river valley arkansas
    Truck:
    94 single cab
    yes thorley is a good header it is what i have on my 22re
     
    toylowta, Dec 18, 2010
    #5
  7. Litneon

    Litneon Super Moderator Staff Member

    Joined:
    Mar 29, 2007
    Messages:
    2,414
    Likes Received:
    50
    Location:
    Cocoa, FL
    Truck:
    94 xtra cab
    What's wrong with the O2 bung location?
     
    Litneon, Dec 18, 2010
    #6
  8. Litneon

    Litneon Super Moderator Staff Member

    Joined:
    Mar 29, 2007
    Messages:
    2,414
    Likes Received:
    50
    Location:
    Cocoa, FL
    Truck:
    94 xtra cab
    And isn't that the #3 cylinder anyway?
     
    Litneon, Dec 18, 2010
    #7
  9. smctoy

    smctoy Toyotaholic

    Joined:
    Nov 9, 2007
    Messages:
    1,731
    Likes Received:
    11
    Location:
    Florence, SC
    Truck:
    91 xcab...
    This is the same one on Ebay from a company in NC. Thought about trying one on my 91 extra-cab.
     
    smctoy, Dec 18, 2010
    #8
  10. dillinja666

    dillinja666 Toyotaholic

    Joined:
    Feb 19, 2010
    Messages:
    2,115
    Likes Received:
    2
    Location:
    san diego
    Truck:
    I gots no truck, for now
    your truck rears all cylinders and adjusts fuel acordingly, if its only reading 1 cylinder then its going to get crazy inacurate.... i cant believe they didnt just weld it down farther in the 1 part of the 4-1
     
    dillinja666, Dec 18, 2010
    #9
  11. Litneon

    Litneon Super Moderator Staff Member

    Joined:
    Mar 29, 2007
    Messages:
    2,414
    Likes Received:
    50
    Location:
    Cocoa, FL
    Truck:
    94 xtra cab
    Well, if I remember correctly, our injectors are batch fired. Meaning that the injectors all fire at the same time for the same duration. So monitoring any one of them lets the ECU know that the mixture is OK. If there were a problem with any one of them, you wouldn't know which one it was even if the sensor was below the collector. It would just run irradically and give you a fuel ratio code of some sort.

    Typically the sensor bung would be on the cylinder which would get the most advanced timing from crankshaft flex.
     
    Litneon, Dec 18, 2010
    #10
  12. smctoy

    smctoy Toyotaholic

    Joined:
    Nov 9, 2007
    Messages:
    1,731
    Likes Received:
    11
    Location:
    Florence, SC
    Truck:
    91 xcab...
    Makes sense cause when I had injector go bad I had to remove them all & have each one pressure checked to find the bad one. I also looked up the Hedman Header for the 22RE & its made the same way as the header listed on the first post. Hell its only money Im going to order one & try it on my truck & let you guys know how it does.
     
    smctoy, Dec 18, 2010
    #11
  13. low_toyota92

    low_toyota92 Enthusiast

    Joined:
    May 20, 2009
    Messages:
    149
    Likes Received:
    1
    Location:
    Nashville, N.C.
    Truck:
    92 ex cab
    that a way to step up to th plate... i really dont care bout makin power just a nice looking, decent price header that looks beter than th stock...
     
    low_toyota92, Dec 18, 2010
    #12
  14. B.Y.E.

    B.Y.E. Toyotaholic

    Joined:
    Aug 21, 2008
    Messages:
    1,705
    Likes Received:
    6
    Location:
    "671" Houston, Texas
    Truck:
    1982 2wd Hilux
    Exactly what i was going to say.... Your stocker is just as good as this header or better in the performance department... Cosmetically it will clean up the bay especially when ceramic coated or chromed...

    :waytogo:


    When I first was looking i almost bought these too... Big brother told me to save up and spend once for the best you can buy... Dougies FTW! :evil:
     
    B.Y.E., Dec 19, 2010
    #13
  15. IronNam

    IronNam Grand Toyotaholic

    Joined:
    Sep 11, 2008
    Messages:
    6,960
    Likes Received:
    14
    Location:
    Kansas -> NorCal
    Truck:
    94 XCab
    Put it this way, if the factory ECU is already reading from all four, why not do all four?


    say you're reading from number one.
    #1 cylinder runs perfectly fine, but say #3 and #4 are running lean.


    ECU doesn't know about #2,3,4... sooooo you might be screwed. :/


    but anyway, back to the headers. If I had money.... Doug Thorleys. But Engnbldr says the factory manifold does fine :)
     
    IronNam, Dec 19, 2010
    #14
  16. Litneon

    Litneon Super Moderator Staff Member

    Joined:
    Mar 29, 2007
    Messages:
    2,414
    Likes Received:
    50
    Location:
    Cocoa, FL
    Truck:
    94 xtra cab
    I get you, and you are right. Except that even reading all four won't solve the problem of a bad injector or let you know which one is bad. All it will do is try to richen the batch by extending the duration. This can fix the overall AF, but doesn't make the bad injector's cylinder run right.

    The reason the bung is usually close to the rear cylinder is that under load (not so much with the 22re powerhouse) you can get some crankshaft flex which will tend to lean out the rear cylinders by changing the ignition and valve timing.

    Ideally you would want an O2 sensor on every tube. But there aren't even many aftermarket ECU's that could handle that amount of analog data.
     
    Litneon, Dec 19, 2010
    #15
  17. pinoaktwh

    pinoaktwh Member

    Joined:
    Nov 1, 2010
    Messages:
    63
    Likes Received:
    0
    Location:
    Beautiful Ky.
    Truck:
    '93 Reg. Cab 4x4
    Why couldn't you just cap that location and place it further back on the exhaust, Isn't it already a couple feet away from the engine anyway? I know mine is. So that location would not matter to me anyway,,,, just cap it off and roll with it.


    Larry
     
    pinoaktwh, Dec 19, 2010
    #16
  18. TRUCK ACTION

    TRUCK ACTION Grand Toyotaholic

    Joined:
    Jan 5, 2008
    Messages:
    4,188
    Likes Received:
    600
    Location:
    Vallejo,Ca.
    Truck:
    88 Extracab,2wd
    The stock location is @ the far end of the header @ the first pipe section!
    That is where LC headers puts their bung!
    The main reason for running after market headers is to exit the exhaust as fast as possible for better breathing,first & foremost!
    Equal length tubes assures all cylinders are dumping the same amount!
    Clean & lasting looks is great, & you get that with ceramic coated stainless headers!
    Don't waste time & money on mild steel headers!:cool:
     
    TRUCK ACTION, Dec 19, 2010
    #17
  19. Litneon

    Litneon Super Moderator Staff Member

    Joined:
    Mar 29, 2007
    Messages:
    2,414
    Likes Received:
    50
    Location:
    Cocoa, FL
    Truck:
    94 xtra cab
    Hey Truck Action, does the LC header extend below the frame rails? You know, for us bagged trucks? Had always wondered about that...
     
    Litneon, Dec 19, 2010
    #18
  20. low_toyota92

    low_toyota92 Enthusiast

    Joined:
    May 20, 2009
    Messages:
    149
    Likes Received:
    1
    Location:
    Nashville, N.C.
    Truck:
    92 ex cab
    thats a main concern of mine too, dont need anything below th rails...
     
    low_toyota92, Dec 19, 2010
    #19
  21. KYNgsx

    KYNgsx Enthusiast

    Joined:
    Aug 13, 2009
    Messages:
    223
    Likes Received:
    1
    Location:
    Hawaii
    Truck:
    89 2wd
    No, the LC header does not go past the frame.
     
    KYNgsx, Dec 20, 2010
    #20
Page 1 of 2

Share This Page