Toyotec presents...the effect of ITBs on a bone stock 16V 29/11/11

Discussion in '16-valve' started by Toyotec, Nov 29, 2011.

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  1. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    "Short engine" as in 'complete bottom end'.

    Still a std ABF job.
     
  2. G28OPN Forum Member

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    Ah, guess I was thinking of short block then lol
     
  3. jmsheahan CGTI Graphics Designer

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    Interesting reading, the call for SEM is getting stronger if I can get my head around it. Will be keeping an eye out for updates.

    (head kind of hurts now though lol)
     
  4. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    It is great when you run a SEM system, as you can make drastic changes to the hardware, such as from a plenum to an ITB set up or from NASP to Turbo and the controller can be made to "know" via some config settings and a map.
    Just need a window of time to get the car all prep'd to support the ITB hardware as well as make it easily reversible, as I wish to continue tracking it with the plenum set up for now :thumbup:
     
  5. KeithMac Forum Junkie

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    Interested to know how stable the afr is compared to speed density and a single throttle plate?. Do you use soley alpha-n for tuning?.

    Quite a few use blended alpha-n due to different in gear loads, do you think it's worth the extra effort?.
     
  6. Ben S

    Ben S Forum Junkie

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    This one was pretty good especially for a the limited time it was on the vehicle, good initial tune one evening by Eddie and then some refinement from me the following evening.
    If you need a slight correction here and there the UEGO could handle it with a low authority, few percent etc. There is also the coolant/ IAT air density correction which can correct anything else.
     
  7. KeithMac Forum Junkie

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    Sounds good!.
     
  8. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    Hey, Keith.

    The airflow in a non plenum NASP system is pretty much dependant on atmospheric conditions or altitude.
    So when opening the throttle for a given ambient condition speed and load, you will pretty much have the same amount of air being processed by the engine. As result a mapped injection duration for a given speed and throttle angle tends to give repeatable exhaust lambda readings.

    Also as you are not filling and emptying the air charge as in a plenum, with ITBs your idle tends to be more stable, right down to 600 rpm! (all other settings being robust of course)
     
  9. KeithMac Forum Junkie

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    Think I will have a crack at this then when I recommission the Mk2 :-). Always fancied a car on ITB's!.

    Good work and a good informative thread, cheers ;).
     
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  10. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    Testing on the Toyotecwerke ITB 45s recommenced today with a trial and run up on JENVEE.

    You can find that update >>here<<

    :thumbup:
     
  11. Coldforged New Member

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    I would especially like to have some detailed pictures, as I guess I have most of the parts kicking about as well and would give me an incentive to get the old girl to another track day.
     
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  12. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    I had material to compile into a post that I am happy to share.

    Had a look today for the pictures and have to do a bit more digging.
    I have quite a few that I took at several stages.
     
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  13. Coldforged New Member

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    Any luck toyotec?
     
  14. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    Yes.

    I found most of my pictures on this.

    Will get something up soon [:D].
     
  15. Tristan Forum Junkie

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    Nicely updated, Ed.
     
  16. Coldforged New Member

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    Brilliant thank you Ed. I am just slowly rooting through my parts gathering everything now.
     
  17. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    The new thread for it is here.
     
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