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Thread: how much boost? just checking shit out...

  1. 11-23-2005, 04:43 AM #1
    4dmin
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    Default how much boost? just checking shit out...

    man chipped 1.8ts have funny boost, i was up at batlground putting on a new MAF sensor and just ran the car:

    spike 21 >>> down to 17 >>> up to 19 >>> down to 12 >>> back up again...

    at 3500rpm it drops from 6.5 to 1 timing anyone got some dynos?

    we were looking at this last night, made some adjustments to make alittle more boost on normal cars, but we think that the ecu/sensor hits a point then drops boost, this i guess is why these turbos start strong and end low.

    what are your cars doing???
    Last edited by 4dmin; 11-23-2005 at 08:45 AM.
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  2. 11-23-2005, 06:52 AM #2
    Chuckster
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    mine does it all the time. When i'll launch the bitch it will hit 21psi for like 2 seconds then drop to 16psi
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  3. 11-23-2005, 02:48 PM #3
    benwaballs
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    when i had my 04.5 GLI (revo & n75 race valve ) spike 21 hold 19
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  4. 11-23-2005, 08:52 PM #4
    Allstar3.8T
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    Quote Originally Posted by benwaballs
    when i had my 04.5 GLI (revo & n75 race valve ) spike 21 hold 19
    Mine exactly the same..
    When FMIC went on spike to 22, hold 20...near redline slow drop off of pressure.

    If you are droppin to 12, then rising again in the same gear...something sounds wrong to me. Sounds like a misfire, or some sort of timing/detonation issue.
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  5. 11-24-2005, 07:12 PM #5
    TTaz02
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    Last edited by TTaz02; 11-07-2010 at 08:47 PM.
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  6. 11-24-2005, 09:03 PM #6
    benwaballs
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    Quote Originally Posted by TTaz02
    i run strong at about 25psi
    BT or mbc? if bt what setup?
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  7. 11-25-2005, 07:10 PM #7
    Allstar3.8T
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    25 steady or spiking. Mine on race program spiked there, held above 22 almost to red.
    Greg
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  8. 11-26-2005, 01:54 AM #8
    SleepingTalon
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    You have to look at the airflow tables to see why the timing is making jumps. With the extra boost, the stock airflow numbers are gonna be different, so it's tough to say without being able to see a log. Also, the GIAC chip probably raises the rev limiter, which in turn would mean that the airflow tables are probably extended so to speak, so you would also need to see what everything looks like there as well.
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  9. 11-26-2005, 03:32 PM #9
    TTaz02
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    Last edited by TTaz02; 11-07-2010 at 08:47 PM.
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  10. 11-30-2005, 07:11 PM #10
    ct9a gsr
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    Wow, I didn't know vdubs use crazy amounts of boost too... get even more respect from me. =]
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  11. 12-01-2005, 12:10 AM #11
    GTi30R
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    Quote Originally Posted by ct9a gsr
    Wow, I didn't know vdubs use crazy amounts of boost too... get even more respect from me. =]
    24psi daily through mine on the stock motor and pump gas

    GT30R-12:idb:
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  12. 12-08-2005, 01:55 PM #12
    AudiA4
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    i hit 20-21 but can only hold about 17 with just a 91 oct apr chip, using 93 octane. ireally need to go get the 93 burned on
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