LT5 supercharged?

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Thread: LT5 supercharged?

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    GMI Camaro Forum Moderator Premium Member Z284ever's Avatar
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    LT5 supercharged?

    Looks like it.....







    BREAKING! LT5 Engine spotted on GM RPO system for a 2018 ZR1 Corvette!





    https://www.facebook.com/WeaponXMoto...type=3&theater
    Last edited by Z284ever; 05-18-2017 at 08:39 PM.
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    Re: LT5 supercharged?

    Makes sense for being the 6.2 version. Why develop two iterations of turbo engines?

    Keep the 4.2L exclusively turbo. Where does the NA 6.2 go? Replace the Vortec in the HDs?

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    Re: LT5 supercharged?

    Sounds like an LT4 on steroids.
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    Re: LT5 supercharged?

    Quote Originally Posted by FenwickHockey65 View Post
    Sounds like an LT4 on steroids.
    Yup.
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    Re: LT5 supercharged?

    Quote Originally Posted by Michael Accardi View Post
    But did you make a thread for discussion? Every single post you make needs to make it to the forums.

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    Re: LT5 supercharged?

    Quote Originally Posted by sfbreh View Post
    Makes sense for being the 6.2 version. Why develop two iterations of turbo engines?

    Keep the 4.2L exclusively turbo. Where does the NA 6.2 go? Replace the Vortec in the HDs?
    The trucks and SUVs already have a 6.2L normally aspirated engine, the early leaked VIN list that reported the LT5 as being 6.2L DOHC N/A was an error as the LT5 is a 6.2L (safe to say OHV) supercharged V-8 instead. In other words the only DOHC V-8 engine family in development at GM is the one that the 4.2L DOHC TT V-8 is a part of.

    And as my best guess would be (which was always my best guess) is that this engine family has bore center spacing smaller then 4.400 inches probably more in line with what the North Star had and what the Coyote has. Translation, that engine family won't be able to go up to 6.2L or larger which makes sense if you consider how big the Coyote is next to the LS3 engine. The Coyote is wider, taller, and heavier while being a smaller block. Lets just say if they made a DOHC 6.2L engine using a block size that is similar to the SBC you would likely end up with an engine larger then the hurricane/BOSS engine. There is no way that engine will fit in the C7 Corvette as is, they would likely have to widen the engine bay to make room for it.
    Last edited by roadkillz; 05-18-2017 at 11:20 PM.

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    Re: LT5 supercharged?

    Larger rotor superchargerwith improved downforce (ie. Big wings) and better cooling.

    That makes the most sense considering the ease in which all of this can be achieved.

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    Re: LT5 supercharged?

    Basically LSA/LS9 all over again.

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    Re: LT5 supercharged?

    Quote Originally Posted by dslay04 View Post
    Basically LSA/LS9 all over again.
    However last time the LS9 came first, then the LSA was produced.....

    I honestly think they had no plans to produce a ZR1 Corvette (when they made the C7 Z06 someone stated that they were merging the Z06 and ZR1 into one model). They probably looked at turbocharging the LT4 but settled on supercharging instead.

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    Re: LT5 supercharged?

    While a 6.2L DOHC engine would have been awesome, the LT5 being an LT4 with upgraded components and a larger supercharger definitely makes sense. I still have my doubts that a wider, potentially taller, DOHC engine could fit in the C7 engine bay, which is why the DOHC engine seemed to align well with mid-engine rumors, since a mid-engine configuration would have more room for a larger engine in theory. I guess we'll see what else comes down the pipeline for Corvette.

    Quote Originally Posted by dslay04 View Post
    Basically LSA/LS9 all over again.
    It's certainly looking like that, isn't it? It will be interesting to see how close that analogy is, once more LT5 information is released. The LSA had other differences aside from the supercharger iirc, such as weaker pistons than the LS9 and forged powder metal rods instead of the Ti units in the LS9. The LT4 has forged powder metal rods, so that could still work out with an LT5 using something more exotic.

    Unfortunately the amount of deatil in the line item of the image posted also perfectly describes an LT4, so the real differences like component materials and which supercharger are still unknown to us.

    Quote Originally Posted by roadkillz View Post
    However last time the LS9 came first, then the LSA was produced.....

    I honestly think they had no plans to produce a ZR1 Corvette (when they made the C7 Z06 someone stated that they were merging the Z06 and ZR1 into one model). They probably looked at turbocharging the LT4 but settled on supercharging instead.
    Good point. I think they did try to combine the Z06 and ZR1 experience with a jack of all trades car. I think the updates to C7 and the image created by C5 and C6 having legitimate track performance, and the factory racing team led to many C7 owners being a lot more serious about tracking their Corvette than in the past. I think GM realized there were those inerested in a higher capability car, and willing to pay for it.

    Even for the C6 days, the ZR1 wasn't originally planned. The story goes that once the C6 Z06 was shown to executives, they were so impressed by what the team was able to do at the C6 Z06 price point that they tasked them with creating a Corvette at the 100k price point.
    Last edited by Cphelps; 05-19-2017 at 08:10 AM.
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    Re: LT5 supercharged?

    Wasn't the ZR1 sort of a Wagoner pet project? I recall the code name Blue Devil supposedly because he was a Duke alum?
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    Re: LT5 supercharged?

    Sooo, am I alone in being totally not excited about this?

    There are so many other performance related products which GM could bring to the table which I would find exciting, this really isn't one of them.
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    Re: LT5 supercharged?

    Quote Originally Posted by Z284ever View Post
    Sooo, am I alone in being totally not excited about this?
    You are not alone

    Quote Originally Posted by Z284ever View Post
    There are so many other performance related products which GM could bring to the table which I would find exciting, this really isn't one of them.
    You mean something like new Z28 with N.A engine? Or maybe ATS-V with 500+ hp? Or new 4.2l v8 TT for Caddy?
    Stop dreaming

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    Re: LT5 supercharged?

    Quote Originally Posted by roadkillz View Post
    The trucks and SUVs already have a 6.2L normally aspirated engine, the early leaked VIN list that reported the LT5 as being 6.2L DOHC N/A was an error as the LT5 is a 6.2L (safe to say OHV) supercharged V-8 instead. In other words the only DOHC V-8 engine family in development at GM is the one that the 4.2L DOHC TT V-8 is a part of.

    And as my best guess would be (which was always my best guess) is that this engine family has bore center spacing smaller then 4.400 inches probably more in line with what the North Star had and what the Coyote has. Translation, that engine family won't be able to go up to 6.2L or larger which makes sense if you consider how big the Coyote is next to the LS3 engine. The Coyote is wider, taller, and heavier while being a smaller block. Lets just say if they made a DOHC 6.2L engine using a block size that is similar to the SBC you would likely end up with an engine larger then the hurricane/BOSS engine. There is no way that engine will fit in the C7 Corvette as is, they would likely have to widen the engine bay to make room for it.
    And that makes even more sense!

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