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Thread: 6.5 TD Highway Mileage Poll by GMC Hauler

  1. #41
    Join Date
    Sep 2006
    Location
    Brooker, FL
    Posts
    1,219

    Default

    Since I've repowered StaRV II with a new AMG engine, things have changed, so I'm revising. Old numbers in italics:


    Everybody's got something so, so, NORMAL...


    1. '94 Barth ["What the HELL is that?"] 28' Breakaway Class A motorhome
    2. 8500? (I dunno, it has a GVW of 18K lbs.)
    3. 4x6
    4. 1 (As if there's anything else as an option)
    5. 1
    6. Injector cleaner and lubricity additive for USLD
    7. 40
    8. Dana 80 4.53 (I think - Mag-Hytec cover installed)
    9. 8x19.5
    10. Mixed
    11. Gear vendor? Nope - no room and unnecessary
    12. Boost control: Non-wastegated turbo - 12 psig max (Purely Stock)
    13. Same as 12.
    14. Automatic Trans 4L80E (Mag-HyTec pan installed)
    15. Thermostat: 2x180F stock with new mill (Kennedy Diesel kit installed)
    16. N/A - DB-2
    17. Timing Gear: Phazer (N)
    18. Intercooled: N
    19. Mist injection: N/A
    20. Air filter: Stock Wix, but this diesel pusher has far less restrictions - "Snorkle" is 4"
    21. Non-EGR
    22. GM Turbo Style: Peninsular Diesel Supplied
    23. Exhaust: 4" Turbo to ground
    24. TDC offset set to : Stock
    25. Hi-Pop Injectors (Stock injectors)
    26. Synthetic oil: N Total waste of money (I'm a former fuels and lube engineer)
    27. Highway mileage: 11.0+ mpg (9.8 mpg)
    28. When mileage data was obtained: Winter (Summer)
    29. Approx miles on vehicle: 56,400 (52,500)
    '94 Barth 28' Breakaway M/H ("StaRV II") diesel pusher: Spartan chassis, aluminum birdcage construction. Peninsular/AMG 6.5L TD (230HP), 18:1, Phazer, non-wastgated turbo, hi-pop injectors, 4L80E (Sun Coast TC & rebuild, M-H Pan), Dana 80 (M-H Cover), Fluidampr, EGT, trans temp, boost gage. Honda EV-4010 gaso genset, furnace, roof air, stove, microwave/convection, 2-dr. 3-way reefer. KVH R5SL Satellite. Cruises 2, sleeps 4, carries 6, and parties 8 (parties 12 - tested).

    Stand-ins are an '02 Cadillac Escalade AWD 6.0L and an '06 Toyota Sienna Limited.

  2. #42
    Join Date
    Dec 2002
    Location
    Terre Haute IN
    Posts
    564

    Default

    1. 1980 Olds Cutlass
    2. 1/8 Ton
    3. RWD
    4. Driving Habits; 2
    5. Tune of vehicle; 3
    6. Fuel additive added every fillup in OZ; 2-Cycle Oil
    7. Size of fuel tank (Suburban is 42 gal): 18 Gallons
    8. Rear Gear Size (3.23, 3.55, 4.10, ect): 3.30
    9. Tire Size (ex; 245/75 R16): 255/60R15
    10. Tread style; Offroad, Mud/Snow, Highway: Highway
    11. Gear vendor? (if so, od/ud ratio and how you use it): None
    12. Boost control; Mechanical/Electrical: NA
    13. Boost pressure setting (4-20lbs):
    14. Manual/Automatic Trans: 700R4
    15. Thermostat (160, 180, 190, 195, 205, 215, none): 180
    16. PCM programming (Heath 1.0, 2.0, Kennedy 72/76/max, Westers): Kennedy DB2
    17. Timing Gear Y/N:
    18. Intercoooled Y/N:
    19. Mist injection Y/N:
    20. Air filter (stock, stock w/ airbox mods, stock airbox with special filter, both, 97 and newer box, cone filter): Factory
    21. EGR/Non EGR: EGR Blocked
    22. GM Turbo Style (GM5,6,8, other):
    23. Exhaust (Stock, mufff removed, kitty removed, 3", 3.5", 4", other) Dual 2.25" straight pipes
    24. TDC offset set to (stock, or the value you have it set to): By ear
    25. Stock injectors/High pop: New stock
    26. Synthetic oil Y/N: 5w-40 Rotella
    27. Highway mileage (not towing, best averaged over 3 tanks): 30.1 Best, 27-29 Average
    28. When mileage data was obtained (Winter, Summer):
    29. Approx miles on vehicle: A zillion! Needs timing chain BAD!
    99 K2500 GMC Ext Cab, 6.5TD, Heath ECM reflash, TDC Offset -1.80, Bumped Optic, FSD Isolator, Turbo Master, KD 3.5" Exhaust, 4.10s and 33x11.50, Intercooler is next.
    98 Burb 350 1/2T/4l60/246/10Bolts - Wifes Ride
    80 Olds Cutlass 6.2/Studded/700R4/12Bolt 3.30s/IP=4544 Juiced by JK/Best MPG=30
    79 Olds Cutlass, 410ci/700R4 - Currently Restoring
    1992 Mitsubishi Eclipse Turbo, currently 12PSI max boost
    39 Chevy Rat Rod
    2004 Sportsman 600
    2002 Scrambler 500
    2007 Sportsman 90
    2003 Kazuma 50
    2001 XR50
    1990 Murry 46"
    43 Total pistons!
    Email= Dr.Diesel@gmail.com WA9SDJ

  3. #43
    Join Date
    Jun 2002
    Location
    NY
    Posts
    131

    Talking Update

    Quote Originally Posted by Michael Cain View Post
    1. What model do you drive Suburban
    2. Level 2500
    3. 4x4
    4. Driving Habits; 3
    5. Tune of vehicle; 3
    6. Fuel additive added every fillup in OZ; none:
    7. Size of fuel tank (Suburban is 42 gal):
    8. Rear Gear Size 3.23
    9. Tire Size (ex; 245/75 R16):
    10. Tread style; Highway:
    11. Gear vendor? no
    12. Boost control;Stock
    13. Boost pressure setting Stock
    14. Automatic Trans:
    15. Thermostat 180
    16. PCM programming none
    17. Timing Gear N:
    18. Intercoooled N:
    19. Mist injection N:
    20. Air filter stock
    21. EGR
    22. GM Turbo Style (GM5,6,8, other):
    23. Exhaust Stock
    24. TDC offset set to stock
    25. Stock injectors
    26. Synthetic oil N:
    27. Highway mileage 17
    28. When mileage data was obtained Spring
    29. Approx miles on vehicle:115,000
    30.
    31. 45 mi/gal with my veggie conversion
    32. 20K miles on conversion
    Last edited by Truckie117; 04-25-2008 at 18:52. Reason: more info
    America Love it or Leave!
    1999 Cheverolet K2500 Suburban 4X4 LT
    Hybrid Diesel/Vegetable Oil conversion by me
    In Memory of My Fallen FDNY Brothers
    Never forget Never Forgive

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