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1G PTE 5557 Turbo Vs 16G tuning

Posted by VictorThiagov, Apr 6, 2020

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  1. VictorThiagov

    VictorThiagov Probationary Member

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    Hello everyone,
    Just wondering if anyone has any tuning experience swapping a 16g to a larger turbo such as mine, a 5557 journal bearing. I recently did the swap and am finding that the power difference has me very dissapointed. The 16g was running 22lbs with up to 19 degrees advance at WOT with zero knock. The 5557 cant seem to get any more than about 13 or 14 degrees without knocking and the power difference is a very slight edge for the 5557. I am running 91 pump gas with washer fluid injection. Does this seem normal or is there an aspect of tuning I am ignoring such as needing to up fuel preesure ect. I never changed the tuning much other than timing and afr tuning to keep it around 11.2:1. The only way I have measured difference is 70-90 times which went from 2.9sec to 2.7sec. Any help would be appreciated.vidmate mobdro word counter
     
    Last edited: Apr 8, 2020
  2. ThunderChild

    ThunderChild Supporting VIP

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    What turbine housing and manifold are you running?
     

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  3. lglracer

    lglracer Supporting VIP

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    Sacramento, California
    What fuel supporting mods do you have? Injectors? What plugs are you running and at what gap?
     

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  4. SasaniFab

    SasaniFab Freelancer

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    If I were you I’d consider changing fuels, 91 octane is not sufficient for the timing your running , even when using meth injection. I’ve never been a fan of meth injection , it’s very inconsistent cylinder to cylinder. Have you tryed dropping the afr ? Somewhere in the 10s?
     

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  5. Lou98GSX

    Lou98GSX Proven Member

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    Carmel, New York
    are you using to large of a nozzle cause you don't want to inject to much meth . on my car it ran a lot better with a smaller nozzle and air fuel around 11.7 . to rich and you have rich knock
     
  6. jed344

    jed344 Supporting VIP

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    Waterville, Iowa
    I would try to richen it up some. Better fuel would make a world of difference. I went from 14b to 20g to hx35 to 62mm. Now the car is high compression with 62mm and even on e85 I am finding the car likes much less timing then I would have thought. Timing isn’t everything to making power.
     

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  7. zackxoxo

    zackxoxo Probationary Member

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    Joined May 18, 2020
    united states of america, D.C.
    Turbo charging question?

    Im a complete nube to this.

    But I saw a "16g TD05 Turbo" going for a bargain price with a bunch of other bits as the guy decided to go for a rotary swap instead, my questions are;

    what is 16g? what is TD05? will it be appropriate for a 1.8 1995? Am I going full retard? will I need 550cc Injectors to accompany a turbo? would this be considered a big or small turbo?

    as a side note its a ball bearing turbo brand new from a subaru sti

    Thanks very much, sorry to clog up the sub with novice questions!
     

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