Some interesting information about the 6.2L Cheverolet engine that is available in the game

Discussion in 'Forza Motorsport 7' started by WFO Krypto, May 31, 2019.

  1. WFO Krypto

    WFO Krypto

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    So, after being harassed by some Honda vTec cars last night in C Class, I decided to do some research about vTec technology. Turns out Honda was the first to do it, then put a patent on it for 10 years. That patent ran out roughly the year 2000.

    vTec Technology is simply variable valve timing. Having the ability to change the opening and closing on the valves and different RPM ranges. The Honda vTec engine produces 130bhp from a 1.3Ltr engine. 100hp per Liter is a crazy ratio for a combustion engine.

    What does this have to do with the Chevrolet 6.2L engine? It also utilizes variable valve timing. The 5.7 Ltr Chevrolet in Forza 6 was not a variable valve engine. The 6.2 Ltr engine will perform very similar in characteristics to a Honda vTec if you gear it correctly. Variable valve timing is a big contributor to performance through the whole power band. When using the 6.2 Ltr keep this in mind when tuning for car.

    A lot of manufacturers are using variable valve timing technology now. It would be a good idea to google the engine you are considering using, or are using, and see if it has this technology.
     
  2. ImaRobot

    ImaRobot Premium

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    A lot of Japanese manufacturers had their own Variable Valve Timing with their engines from that era. Toyota had VVTI, Mitsubishi had MIVEC, and Nissan had NVTC. All of which were around the same time as the Honda' you're talking about. I wouldn't doubt that there's also more manufacturers that have been doing it as well.
     
  3. Tornado

    Tornado

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    37,732
    The VTEC patent was on directly actuated cam switching, which is a form of variable valve lift and which most contemporary manufactures of VVT systems didn't bother implementing at the time (the system used in the final generation Celica being the main exception, but that was also done in a different way). That cam changeover is what VTEC JUST KICKED IN YO is referring to. Many engines by the mid-late 90s had some form of VVT, in function if not necessarily recognizable when compared to the systems today.



    The VVT system in the LT1 is what allows the engine to have a humongous increase in torque basically off idle through redline over the LS3 that it replaced, with numbers approaching that of the larger LS7 until the latter walks away in upper revs. Suffice to say:

    [​IMG]
    This is absolutely nothing like typical VTEC engine characteristics.
     
    Last edited: May 31, 2019
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  4. limepie

    limepie

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    150
    For comparisons sake, here's a dyno graph from a 2ZZGE (the Toyota Celica engine that operated more similarly to old VTEC cars) you can see exactly where the lift is happening, its not a smooth thing like modern variable valve timing, it happens all at once. The weird powerband is a big part of why people loved cars like this in the 90's and early 2000's. Having driven them, it feels like someone just flips a switch right when a normal engine would run out of steam, these cars suddenly gain a bunch of power. You can also really distinctly hear the changeover.

    [​IMG]

    Here's what it sounds like:
     
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  5. HyperSpeeder

    HyperSpeeder

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    196
    6.2L swap is LS3 not LT1.

    It's a light, torquey engine, that's why it's one of the best.