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Thread: Disgruntled sixfivediesel owners

  1. #11
    Join Date
    Feb 2007
    Location
    Baja California Sur Mexico
    Posts
    2,804

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    There must have been a printing error, because they can be chipped to 300 hp.
    Grant H.
    1995 6.5 turbo GMC K2500 extra cab 4x4 pickup, PMD under bumper, mechanical wastegate, 228,000 miles, rebuilt engine, 4.10 diff, 16 mpg
    1994 6.5 turbo GMC K2500 4x4 suburban "F" VIN #9 resistor, PMD in the bumper, mechanical waste gate, 226,000 miles, Positrac 3.73 diff, 17 mpg highway.
    1982 4x4 shortbed 6.2 Chev 260,000 miles untouched motor 17 MPG 4.27 diff. Best thing I ever owned, 21 years.

  2. #12
    Join Date
    Dec 2007
    Posts
    444

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    And regardless of the fuel input you can add propane and push a lot more power that doesnt require additional diesel fuel.
    1994 GMC ext cab long bed C1500 6.5TD w/ 50 gallon aux fuel tank/tool box; 480LE; 3.42 gears; Engh Motors L65 Power E-PROM and OBDI GMTDScan; 3.5" exhaust (until I fix that); SSDS FSD Heatsink, Intake, Marine Injectors and fan upgrade; Boost, EGT, Trans Temp guages; 84K original miles

  3. #13
    Join Date
    Jul 2008
    Location
    S. Ohio
    Posts
    566

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    I had 11,000lbs(or so) behind mine this week.Even with 3:42s and a zillion miles,the old 6.5 amazes me.I dont tow a lot,but couldnt see how you would need much more than our trucks make stock.Granted the bobcat doesnt sit as high or as blunt as a camper ect,but really felt strong to me.My 454 1 ton couldnt hold a candle to the 6.5 loaded with same weight
    still driving stuff with an 8 track,not switching to those newfangled cassettes thingys...... I cant find anything since I moved all my junk

  4. #14
    Join Date
    Aug 2007
    Location
    Manitoba, Canada
    Posts
    298

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    Didn't mean to burst anybody's bubble or anything but I did find that article a little disturbing. I am very happy with the power my truck puts out and I do feel it will pull at least as much as a big block gasser.
    94 GMC K1500, 4L80E, 3.73gears, EGR plugged, intake reamed out but OEM filter, 3inch downpipe and exhaust, boost and pyrometer gauges, kennedy chip, 600kms. on average tank with no load and light foot. Super truck!

  5. #15
    Join Date
    Jul 2007
    Location
    Attica, OH
    Posts
    1,061

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    my seat of the pants opionion. My 6.5 TD will pull the same and just as good as a 99 f350 7.3 joke. Was lucky enough to hook to the same trailer/ load once with the work truck and my truck. THe better part, my 6.5 started rollin away with the trailer soon as foot off brake. THe joke, you gotta give it fuel to make enough power to start movin and doesn't amke any power till the turbo spools up. Plus i like my truck alot more than any ford.
    93 chevy K2500 6.5TD 4x4 4l80e auto
    Custom flatbed with foldaway gooseneck ball
    SSDiesel DB2 injector pump marine injectors
    Upgraded turbo ( no id tag but lots of boost)
    SSDiesel 4" exhaust, no muffler, SS crossover
    Rebuilt 4l80e tranny Transgo stage 2 shift kit
    rebuilt HD torque converter
    4x4 Posi Lock
    Opened up air box, stock filter
    Boost, Pyro, Tranny gauges in A-pillar
    Cowl hood, all new paint.
    SS Diesel Cooling upgrade, single tstat Dmax fan,
    '98 HO waterpump.

  6. #16
    Join Date
    Jul 2008
    Location
    S. Ohio
    Posts
    566

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    We took brothers powerstroke on a 6x6 retrieval.Ran well,18 mpg(with a utility bed,not aerodynamic) but listening to that loud motor made me like the old 6.5 even mmore,plus 3 more mpg.
    still driving stuff with an 8 track,not switching to those newfangled cassettes thingys...... I cant find anything since I moved all my junk

  7. #17
    Join Date
    Feb 2007
    Location
    Lincoln, NE USA
    Posts
    712

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    Quote Originally Posted by Oldsmoke View Post
    So I been lookin' back over a couple old Diesel Power's and in a write up on the Stanadyne DB2 it says the pump supports motors with as high as 200 HP.

    I would assume that unless the displacement of the pump is enlarged there is no way you can get more than 200 crankshaft hp from the pump since it simply can not pump enough fuel.

    It has been my understanding that the only difference between a DB2 and a DB4 is that the DB4 is electronically controlled and the DB2 is mechanical.

    So is there no way to get more that 200hp from our 6.5's?
    Recheck your math. The article said the DB2 can support up to 50hp per cyl = 400hp. With marine injectors, intake and exhaust mods, boost increase to 15 psi., and the IP turned all the way up, you can make a reliable 300-320 hp from a DB2 without major engine or IP mods. If you want more power, the DB2 can be modified to acheive the 50hp level, but the 6.5 won't handle that hp/torque level very long without extensive ($) modifications to the motor, and you will lose low rpm drivability.

    Husker 6.5

  8. #18
    Join Date
    Aug 2007
    Location
    Manitoba, Canada
    Posts
    298

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    I wish you were right on that Husker. Get out those reading glasses!
    94 GMC K1500, 4L80E, 3.73gears, EGR plugged, intake reamed out but OEM filter, 3inch downpipe and exhaust, boost and pyrometer gauges, kennedy chip, 600kms. on average tank with no load and light foot. Super truck!

  9. #19
    Join Date
    Jul 2008
    Location
    S. Ohio
    Posts
    566

    Default

    Id like to throw an HX35 thats in my stash(non w/gated ) and my 4911 pump on the old 6.5 and see what really happens.Crank up the fuel rate bout a 1/2 turn with a tad adv on the timing and tune with the pyro from there.I bet you could get 275 horse w/o a cooler or meth/water.But after the rocker arm,valve spring fiasco,and then using the WRONG hole to reinstall the i/p,i swore i would never pull it apart again.The HX looks like the same pattern as our GM turbos,and the discharge even looks like its clocked right and spaced to hook it up factory looking.Next time I do a turbo on it,the inner fenders coming out
    still driving stuff with an 8 track,not switching to those newfangled cassettes thingys...... I cant find anything since I moved all my junk

  10. #20
    Join Date
    Aug 2007
    Location
    Manitoba, Canada
    Posts
    298

    Default

    Is the 4911 pump an American Bosch? I'm thinking that might be what's on an old DT 466 IH I have laying around. Looks like the DB2 only a little bigger?
    94 GMC K1500, 4L80E, 3.73gears, EGR plugged, intake reamed out but OEM filter, 3inch downpipe and exhaust, boost and pyrometer gauges, kennedy chip, 600kms. on average tank with no load and light foot. Super truck!

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