2014 engine HP, torque, and fuel economy ratings . . . - Page 9

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Thread: 2014 engine HP, torque, and fuel economy ratings . . .

  1. #121
    6.2 Liter LS9 Supercharged V8 KingElvis's Avatar
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Quote Originally Posted by Slideways View Post
    While I hope 260hp is low, the current 5.3L doesn't make the same hp/L as the 6.2L truck engines, let alone the LS3, so I don't expect the Gen 5 5.3L to make 385hp. As far as I know, GM hasn't even confirmed the bore/stroke of the 4.3L or the 5.3L, so we can't assume it has the same potential for airflow as a 4.06-inch bore of the LT1.
    They are all 3.62" stroke.
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  3. #122
    6.2 Liter LS9 Supercharged V8 Ed753's Avatar
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Quote Originally Posted by dslay04 View Post
    Exactly

    Using the ratio 450hp per 6.2L V6, you get 315hp for the 4.3L, and 385hp for the 5.3L
    I've already comment on the other engines, you are close on the 6.2L, but the others a bit optimistic......................
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  4. #123
    6.2 Liter LS3 V8 TruckMan's Avatar
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    I still say that a 4.3L V6 will have to make over 300 hp to not be a joke. I know truck engines are tuned differently, but the 3.6L from 5+ years ago makes over 300 hp. I expect the 4.3L to make at least 300 hp.
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  5. #124
    6.2 Liter LS9 Supercharged V8 Slideways's Avatar
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Quote Originally Posted by KingElvis View Post
    They are all 3.62" stroke.
    If that's the case, it puts the 4.3L at a 3.905 bore, which is appropriate because it makes it 3/4 of an LS1. I had hoped they'd all go to larger bores and vary the stroke. It seemed to me that would have made it easier to design combustion chambers and injector placement. Plus, a 4.06x3.15 5.3L would have been the hotrod engine of the future.

  6. #125
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Quote Originally Posted by Bvonscott View Post
    Ordering guides for the crew cabs will be out March 7th.

    Any update on this?

  7. #126
    6.2 Liter LS9 Supercharged V8 KingElvis's Avatar
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Quote Originally Posted by Slideways View Post
    If that's the case, it puts the 4.3L at a 3.905 bore, which is appropriate because it makes it 3/4 of an LS1. I had hoped they'd all go to larger bores and vary the stroke. It seemed to me that would have made it easier to design combustion chambers and injector placement. Plus, a 4.06x3.15 5.3L would have been the hotrod engine of the future.
    There's a press release out there somewhere in ether. It tells how the common stroke allows them to use the same crank on the V8s and just cut the crank by 1/4 on the V6.

    With DI engines, the high compression already pushes up the potential for NOX smog particle formation - a super short stroke and big bore are also bad for NOX so that would be a bad combo for passing emissions.
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  8. #127
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Don't know if this has been posted yet. http://www.mlive.com/auto/index.ssf/...do_gmc_si.html

  9. #128
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Well nothing to do with the 4.3 but I also think 5.3 will be more than the 5.0 from Ford because the 5.3 will be the max tow engine in LT/SLE trim trucks. I just really doubt GM having different max tow ratings with the max tow package.
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  10. #129
    6.2 Liter LS9 Supercharged V8 KingElvis's Avatar
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Hey FISH, thanks for that. So sometime this month the speculation will end. The IDES of March perhaps? Et tu, Chevrolet?
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  11. #130
    6.2 Liter LS9 Supercharged V8 Ed753's Avatar
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Quote Originally Posted by KingElvis View Post
    There's a press release out there somewhere in ether. It tells how the common stroke allows them to use the same crank on the V8s and just cut the crank by 1/4 on the V6.
    With DI engines, the high compression already pushes up the potential for NOX smog particle formation - a super short stroke and big bore are also bad for NOX so that would be a bad combo for passing emissions.

    If only the connecting rod journal positions were the same rotational spacing on a 6 and 8 cylinder................
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  12. #131
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Quote Originally Posted by fish5225 View Post
    Don't know if this has been posted yet. http://www.mlive.com/auto/index.ssf/...do_gmc_si.html
    "When asked if the new pickups will offer better fuel economy than Ford Motor Co.’s F-Series lineup after their unveilings, GM North America President Mark Reuss said “it depends on which one you’re talking about.”
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  13. #132
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

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  14. #133
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Well, we're pretty far into March now. WTF are they waiting for?

  15. #134
    6.2 Liter LS9 Supercharged V8 KingElvis's Avatar
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    Quote Originally Posted by Ed753 View Post
    If only the connecting rod journal positions were the same rotational spacing on a 6 and 8 cylinder................
    Yes I'm aware of that as well as 'odd fire' 'even fire' and so forth.
    Check out my automotive blog http://elvisceralappeal.blogspot.com/

  16. #135
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    Re: 2014 engine HP, torque, and fuel economy ratings . . .

    ...watches pot of water on stove.

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