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Thread: Closing turbo vanes for turbo braking?

  1. #1
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    Default Closing turbo vanes for turbo braking?

    Is this something that can be set in EFI live say like an always on Jake brake? I know that Banks and Fleece performance have made a turbo brake and boost controller but I was wanting to do something a little more simple (and cheaper) which would be to have the turbo vanes closed at 0% throttle or maybe 1-2% throttle. Anyone done this and how did it work out?
    In my mind it would probably be best when a DSP switch comes out for the LBZ that way I can have two replica tunes, one with the "turbo brake" and one without that way I can turn it on and off whenever I need or don't need it.
    2006 Chevrolet 3500 4x4 CC DRW LT3
    LBZ/Allison
    Ranch Hand replacement bumper/grillguard, PPE Airbox Mod, PPE Xcelerator Standard set at 90HP (for now) and blocked EGR, Diamond Eye 4" offroad exhaust (has anyone seen my cat?), Autometer Gauges

    Mods to come: Transgo Jr

    Towing- 2008 Pilgrim Legends GVWR 14,900 lbs

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    yes can be done very ssimpley

    vane possion in the first 2 rows 0 and 5 mm3 i think it is and from 0 to about 1800rpm
    is the airia where i set to 90% ( i am trying to rember its been a while since i built my tune)
    your are also gona want to add to the boost tables in the same airias

    from what i rember thats the base of things some one jump in if i forgot soemthing

    over on Diesel place in the tune library theirs a tune that has turbo braking if i rember its labeld

    i used that as my base
    my self i wanted it to come in sooner and last a little longer so i jsut added some to it

    works friking grate! defenetly helps out
    one draw back to my settings i have is on center hills going down that are not that steep it will bounce on and off off of the turbo brake jsut annoying to have the turbo cycling ever 2 secconds
    can fix it by pulling out of the 5 mm3 row if you dont like it

    i run mine on all tunes all the time jsut because its so nice to have for every day driving

  3. #3
    Lifetime Member killerbee's Avatar
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    This is why vane position should be one of the dsp tables. It wastes a lot of fuel when you don't want it.
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

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    Quote Originally Posted by killerbee View Post
    It wastes a lot of fuel when you don't want it.


    ???? how is it wasteing fuel? just ciriouse on your thoughts.

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    Lifetime Member killerbee's Avatar
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    Energy management

    grade braking with a load is a good thing, but lacking a load, you can't coast to conserve energy. Kinetic Energy is always being consumed/reduced to brake the vehicle.

    Hypermilers could explain better than I. You can literally plan stops with this vehicle 1/2 mile away, due to its 8000 lb kinetic momentum. That is potentially 1/2 mile with no fuel used. If the truck brakes every time you lift the throttle, you sacrifice this.
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

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    i think i git where your coming from makes since

    i should mension above that im running a ZF not a Allison im able to down shif to take better advantages of the rpm and the boost that is built up when braking so i cant say how the Allison behaves unless you can tune it to downshift after say 2 secconds of 0 throttle the same way a 5500 will downshift when you have the factory turbo brake switch engaged.

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    Do you set it to 90 percent on both lines from 0 to 1800 on all turbo vane position tables under boost?

    Brian

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    yes sir for turbo vain position , and for disired boost i recall adding some in to the first 2 rows as well to keep from throwing a over boost code up.

  9. #9
    Lifetime Member killerbee's Avatar
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    Quote Originally Posted by Brian1 View Post
    Do you set it to 90 percent on both lines from 0 to 1800 on all turbo vane position tables under boost?

    Brian
    set it to vane maximum to 100% for the first two lines to 4000 rpm. Also, you need to change boost to 10 or 15 psi so that vanes will close (they need to produce boost)
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

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    Hey guys - I just finished working up my turbo brake - It's great!

    The only thing that's NOT great is when I turn the key off it BUZZES LOUDLY.

    Any ideas?

    I'm in a low altitude area (at about 100 feet above sea level) .

    Desired Boost levels EGR ON (Even though I've shut it off via programming)
    0 MM3 - from 0 RPM until 1000 RPM at 15 LBS boost
    0 MM3 - From 1000 RPM until 4800 RPM at 25 LBS boost
    No other changes

    Desired Boost Levels EGR OFF
    0 MM3 - from 0 RPM until 1000 RPM at 15 LBS boost
    0 MM3 - From 1000 RPM until 4800 RPM at 25 LBS boost
    No other changes

    Turbo Vane Position EGR On
    0 MM3 - 1200 RPM - 4800 RPM 100%
    No Other Changes

    Turbo Vane Position EGR Off
    0 MM3 - 1200 RPM - 4800 RPM 100%
    No Other Changes

    Turbo Vane Position Maximum Low Altitude (other altitude set up the same)
    0 mm3 - 300 rpm until 3600 rpm 100%
    5 mm3 - 300 rpm until 3600 rpm 100%

    Turbo Vane Position Minimum
    Not changed
    (Although Earlier I had set 0mm3 300 rpm until 3600 rpm to 100%)


    Now everytime i turn the key to off, in like 1 -3 seconds it starts buzzing.

    Any ideas?

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