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Head P & P

Discussion in 'General Discussion' started by slow_yota, Feb 21, 2008.

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  1. mephtar

    mephtar Well-Known Member

    wil this p&p call for opening up the MAF and enriching the mixture a bit? (for WOT performance)
     
    mephtar, Feb 27, 2008
    #21
  2. Mafix

    Mafix Owner Staff Member Administrator Donated!

    nope. very nice and a great pic. i'll be editting this later to make a sticky. i does appear that the porting would not affect atomization as i would have thought with the port divider right there.
     
    Mafix, Feb 27, 2008
    #22
  3. slow_yota

    slow_yota Well-Known Member

    Maf: Sounds good.Im pretty happy with everything came out on the p & p, I also have some "before/during the porting" pics too ..Got kinda camera crazy with this new one [12 mp slr cam FTW !]

    Meph: This is more of how to get a better flowing head [air wise] more than advantadges on the fuel..Im sure the ecu/fuel map isnt anywhere near 100% at stock so it should be fine.
     
    slow_yota, Feb 27, 2008
    #23
  4. mephtar

    mephtar Well-Known Member

    I figured with the ability to flow more air into the cylinders you might want to richen the fixture to keep it from running lean. I wasnt sure if the AFM has a WOT setting that delivers a set amout of fuel at WOT on a stock setup. But if the AFM is dynamic and will see the increase in air I guess it wont make a differience
     
    mephtar, Feb 27, 2008
    #24
  5. slow_yota

    slow_yota Well-Known Member

    Well..i Know my echo has a "learnable" ECU and i was told that toyota has been making them since the mid 80 so i was hoping this also holds true on the st16XX series as well.
     
    slow_yota, Feb 27, 2008
    #25
  6. Youds

    Youds Well-Known Member

    wow gogd work seems like a good price as well. how would u rate difficulty in this :p maybe ill do this up on the 1liter turbo engine when i rebuild it (if i rebuild it ) haha
     
    Youds, Feb 27, 2008
    #26
  7. slow_yota

    slow_yota Well-Known Member

    one ltr..?..Hmm..ok
    Hmm..Not real hard, the main thing was to have a steady hand and not dig into one place for a long time, 9 out of ten guys should be able to do it..just keep moving and take your time..Each port took about an hour to do..Well if you did it like i did anyways..After i used the stone head and grindign wheels..i went from a 120 gtit all the way down to 600 for the final process..So about 16 hrs in all = 16 ports
    [head has 8 ..intake mani had 4 and exhaust mani had 4]
     
    slow_yota, Feb 27, 2008
    #27
  8. Klue

    Klue Well-Known Member Donated!

    The engine has a typical port injection fuel injector position. Maybe I'am thinking to far outside the box, but I think that his statement validates my thinking more. Spraying the fuel in this N/A motor at 50 plus PSI, Not on the back of the VALVE but bwtween the two runners.

    Being as ignorant as i am, i went to grab some spare injectors i have off of a 3sgte, 440CC, and basically the same head design. Looking at the injector the tip has a crown with the actual "holes" firing at an angle

    [​IMG]

    So I suppose you should be OK smoothing out the innersection, still IMO, i would not, it would require a far too "ideal" world for fuel never to contact the head/port surfaces.
     
    Klue, Feb 28, 2008
    #28
  9. slow_yota

    slow_yota Well-Known Member

    Hmm..3sge injectors only have one hole at the pintle.
    But it does spray out like the above pic so i agree with the statement that there should be an equel dispersement of fuel in each port..And my F.I.'s have been cleaned, balanced and rebuilt so im sure they're as good as they're gonna get.
    And no im done with the head [porting wise anyways]
    Im looking for some minorly higher lift cams and im going to do a 6 angle valve job...As for the divider..i dont have the tools to get back that far to make a difference.
     
    slow_yota, Feb 28, 2008
    #29
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