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GM&GMC MID SIZE TO GET DIESEL 2015

Discussion in 'General Automotive' started by charles leandro, Aug 26, 2013.

  1. KenLyns

    KenLyns Lord of War

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    You are reading too much into the torque figure. The new Colorado will be bigger and heavier than the Taco. 180 hp in a heavier truck will result in poor acceleration closer to the 2.7L Taco than the 4.0L Taco.

    The flagship Hilux model in Australia is the Hilux TRD with factory-installed supercharger on the 1GR-FE gas engine... This is what Australians drive when they can afford gas prices:

    [​IMG]

    [​IMG]
     
    Last edited: Aug 26, 2013
  2. Gincoma

    Gincoma Special Edition Member

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    The 4L60E was a pile of junk I know first hand. Seems like the 4L series loves to slip around 80k miles
     
  3. DoorDing

    DoorDing Thank you, Nancy Roman

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    American manufacturers have been selling diesel cars and trucks for years ... mostly for sale outside the U.S. market. GM, Chrysler, and Ford all have diesel vehicles in production.
     
  4. Calboyincal

    Calboyincal Well-Known Member

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    This is true, in a drag race. But if you look at the RPM range most drivers spend 90% of their time using, the diesel actually has more available power and torque.
     
  5. bolio

    bolio Well-Known Member

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    With all the taxes it's more cost effective for toyota to import the d4d engine and modify the tacoma to fit it. And I don't think Americans like the car like front end of the international pickups(Hilux, world Ranger, Coloroda etc). I think one of the reasons they are made that way is to pass Euro crash pedestrian tests. I like the taco better looks wise.

    It's a mystery to me why Nissan doesn't bring V9X V6 diesel they use in the Frontier(Navara) in other countries. 210hp and 410 lbs and it already fits. I guess passing emissions is too complicated and expensive to take a risk in the USA. And they also offer a more economical 4 cil diesel in the navara with 170hp and 300lbs
     
    Last edited: Aug 27, 2013
  6. black_magic2010

    black_magic2010 Well-Known Member

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    Mine has 120K no problems what so ever.
     
  7. KenLyns

    KenLyns Lord of War

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    I don't think that's the case given the 50% power deficit of the diesel. Do you have dyno charts comparing GM's 2.8L turbodiesel with the 3.6L LFX or the D-4D with 1GR-FE? Keep in mind the diesel's turbo needs to spool up a bit, too.
     
  8. SkottK62

    SkottK62 Well-Known Member

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    A lot of Americans still think diesel engines are noisy and foul smelling. The price of diesel doesn't help either. Now we all know refinement has greatly helped with the noise and smell over the years but many Americans still feel the diesel engine is still that way. Manufacturers haven't educated people enough either as to another reason why.
     
  9. dbs1

    dbs1 Well-Known Member

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    I was simply comparing current Tacoma power levels to the posted 180/346. Even if the new Colorado outweighs it by 250lbs, using those figures (especially the tq available off idle) I don't see the GM product losing much to the current toy 4.0, especially in the current poor mpg figures.

    GM's new 4.3 is showing 285/335 I believe and with DI I'm guessing even in what you're claiming to be a heavier vehicle, it should walk away from a current Tacoma WITH an SC installed and get better fuel economy to boot.

    Again, I'm a Tacoma fan, but due to good sales it seems Toyota has sat on their hands for too long with the power plants in these trucks. GM is going to take a share of this medium truck market with their new offering which will force Toyota to bring some new power plants to market. A win for all of us.
     
  10. stump jumper

    stump jumper Well-Known Member

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    case in point, just look at the disaster that Ford designed a while back. I pity anyone that owns one.
     
  11. JimmyRiddle

    JimmyRiddle Member

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    Price will be the real determining factor for these diesels.
     
  12. tacojpklx

    tacojpklx Well-Known Member

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    There may be more diesels coming in light trucks, but I seriously doubt any will ever arrive with a manual transmission. Unless I see that drive train combo, I'm not interested.
     
  13. KenLyns

    KenLyns Lord of War

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    According to this Wikipedia article http://en.wikipedia.org/wiki/Powerstroke, the International engines were the ones with design issues. Ford switched to making its own engines in 2010.

    The new Colorado is bigger dimensionally than the Taco and has a steel bed. Weight difference could be closer to 600 lb. Anyway, the 2.8L diesel doesn't compete with the 1GR; the diesel competes with the LFX 3.6L gas engine that will be offered in the Colorado. That engine makes 301 hp and 272 lb-ft in the Equinox, and 323 hp / 278 lb-ft in the Camaro.
     
  14. Calboyincal

    Calboyincal Well-Known Member

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    I looked for a dyno comparison but couldnt find one for those engines, but i have seen a comparison and I'm not making things up. Diesels have low redlines but make all of their torque in the range most people drive in (1500-2500 rpm) whereas most gas engines need to rev much higher and are therefor not using their available power much of the time (most peak at 4500 rpm or higher). I know that on paper it looks underpowered and does have less power, but having owned a Jetta tdi with 100 hp and my dad having a 1997, 2001, and 2010 Dodge diesels, and driving a hilux diesel around nicaragua both on and off road, I will say that diesels fall short only in throttle response. I love drifting my 4.0 taco 6 speed and have great throttle response and control, but for pretty much all other driving I would prefer a diesel.
     
  15. KenLyns

    KenLyns Lord of War

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    My point is, the power disparity between diesel and gas engines is so great, even at low rpms the gas engine can match the diesel. For example, here's a dyno chart of 1GR courtesy of Commanderwiggin.

    1500-2500 rpm is cruising rpm where you don't need power... If you need to pass, step on the gas and by 3250 rpm (basically instant) you are already making equivalent of peak power of the 2.8L diesel. (Est. 18% driveline losses.)

    [​IMG]
     
    Last edited: Aug 28, 2013
  16. ABA180

    ABA180 It burns when I pee....

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    Agreed, as someone who remembers the 80's GM diesels..
     
  17. DoorDing

    DoorDing Thank you, Nancy Roman

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    I'd consider a Ford or Fiat sourced diesel (have to see the history of the engine), but I'd skip on anything GM on general principle.
     
  18. Rich91710

    Rich91710 Well-Known Member

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    HP is low because HP is a function of torque and RPM.
    346 ft/lbs at 1500 is a LOT of power for a 4,000lb truck. It translates to low HP because you are not multiplying the function by 5,000.

    I had an '06 Duramax and the thing was a powerhouse... acceleration included.
     
  19. Rich91710

    Rich91710 Well-Known Member

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    6.6 litre...

    Peak torque was actually much lower RPM but the operator was having problems getting the transmission to lock into direct drive below 2300.
    This was an '06 Duramax which was running the 32 bit Bosch system and he didn't have the proper CANDii adapter.

    [​IMG]
     
  20. Pyramidsurf

    Pyramidsurf Well-Known Member

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    Interesting. I hope this forces Toyota to bring some serious changes to the Tacoma.
     
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