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  1. #151
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    Default Re: 2014 Chevy/GMC specs

    Quote Originally Posted by sd455dan View Post
    I stand by my statement about (IN THE PAST) ohv engines vs. ohc.

    In many cases ohv are lower revving they also in many cases produce more total torque than total horsepower. I know of very few normally aspirated ohc engines that can make that claim...

    Ohc engines generally will rev higher producing more peak horsepower, but do not generally produce as much torque at low rpms.

    A good example of these normally aspirated ohv engines are my favorite Pontiacs.

    Like some of the versions Butler performance builds- the basic 455 cu producing 580 hp 625 ft. lbs. also average torque far exceeds average horsepower.

    Many ohv engines produced more average torque than horsepower.


    If ohc head designs produce as much or more low end torque, you would think they would be in use on more than half the diesel tractor engines and over the road diesels.. I believe its all about low end torque...

    I maintain that in general - in the past normally aspirated ohv engines produce more low end torque than ohc engines
    The Ford 5.4 L (OHC) has always had more torque (especially at low-end) than the 5.3 L (OHV) engines. Ask those that have towed with them, and they will tell you the 5.4L tows much better than the 5.3L. Heck the 5.4L had almost as much torque as the 6.0L in the GM's...lacking what, 10 ft-lbs? It's all in the tuning of the engine, not the OHC vs. OHV debate.

  2. #152
    Veteran Member deerefan's Avatar
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    Quote Originally Posted by fordmantpw

    The Ford 5.4 L (OHC) has always had more torque (especially at low-end) than the 5.3 L (OHV) engines. Ask those that have towed with them, and they will tell you the 5.4L tows much better than the 5.3L. Heck the 5.4L had almost as much torque as the 6.0L in the GM's...lacking what, 10 ft-lbs? It's all in the tuning of the engine, not the OHC vs. OHV debate.
    I cant speak for the 5.4. I have a 97 F150 with the 4.6 (4x4) that is gutless when towing. I am not a big fan of the mod motors. PITA to work on. The 5.3 tows a lot better with the new 6 speed auto. I only tow occasionally. If towing regularly, I would have a diesel.

  3. #153
    Super Member 94BULLITT's Avatar
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    Default Re: 2014 Chevy/GMC specs

    Quote Originally Posted by Peacock View Post
    Because they say. I guess that is reliable. Plus it looks different to my eyes.
    It is considered a gen 5 engine right?

    Quote Originally Posted by fordmantpw View Post
    The Ford 5.4 L (OHC) has always had more torque (especially at low-end) than the 5.3 L (OHV) engines. Ask those that have towed with them, and they will tell you the 5.4L tows much better than the 5.3L. Heck the 5.4L had almost as much torque as the 6.0L in the GM's...lacking what, 10 ft-lbs? It's all in the tuning of the engine, not the OHC vs. OHV debate.
    The 5.4 is a long stroke motor (4.165). That helps with torque. Most of the Fords were geared to high.

    Quote Originally Posted by deerefan View Post
    I cant speak for the 5.4. I have a 97 F150 with the 4.6 (4x4) that is gutless when towing. I am not a big fan of the mod motors. PITA to work on. The 5.3 tows a lot better with the new 6 speed auto. I only tow occasionally. If towing regularly, I would have a diesel.
    What gears and tires on the 4.6 F-150. For the most part you don't have to do much work to a mod.

  4. #154
    Veteran Member deerefan's Avatar
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    Quote Originally Posted by 94BULLITT

    It is considered a gen 5 engine right?

    The 5.4 is a long stroke motor (4.165). That helps with torque. Most of the Fords were geared to high.

    What gears and tires on the 4.6 F-150. For the most part you don't have to do much work to a mod.
    3.55 gears, factory 265/75/17 tires. Auto trans. Good run around truck, great off road plenty of clearance, just not a strong tower.

  5. #155
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    Default Re: 2014 Chevy/GMC specs

    The 4.6 wasn't known as a good towing motor, but was better than the 4.8 in the Chevy. The 5.4 on the other hand, was a different story. It was a great towing engine. I towed a travel trailer with it (with the old 4 speed tranny, not the newer 6 speed) and it towed great.

  6. #156
    Super Member 94BULLITT's Avatar
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    Default Re: 2014 Chevy/GMC specs

    Quote Originally Posted by deerefan View Post
    3.55 gears, factory 265/75/17 tires. Auto trans. Good run around truck, great off road plenty of clearance, just not a strong tower.
    That is way too big of tires on it. I know a guy that has that same combo, it is gear like a airplane. With those tires it should have had 4.10's

  7. #157
    Veteran Member deerefan's Avatar
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    Quote Originally Posted by 94BULLITT

    That is way too big of tires on it. I know a guy that has that same combo, it is gear like a airplane. With those tires it should have had 4.10's
    It is what it came with new in 97. Bad engineering?

  8. #158
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    Default Re: 2014 Chevy/GMC specs

    Quote Originally Posted by 94BULLITT View Post
    It is considered a gen 5 engine right?
    Yes.

    And actually what I have now found is that they share 'a few parts like rocker arms'....
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  9. #159
    Super Member 94BULLITT's Avatar
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    Quote Originally Posted by deerefan View Post

    It is what it came with new in 97. Bad engineering?
    No just stupid salesmen ordering them like that.
    Roger

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  10. #160
    Super Member 94BULLITT's Avatar
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    Quote Originally Posted by Peacock View Post

    Yes.

    And actually what I have now found is that they share 'a few parts like rocker arms'....
    I found they share a few things, I think it resembles the LS motors.

    http://www.gmhightechperformance.com...k/viewall.html
    Roger

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