First Look: Fifth Generation Small Block Chevy

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Thread: First Look: Fifth Generation Small Block Chevy

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    Alex Villani: Staff Writer Premium Member BigAls87Z28's Avatar
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    First Look: Fifth Generation Small Block Chevy

    Looking A Bit Closer At The new Small Block
    July 16th, 2012
    www.GMInsideNews.com
    by: Alex Villani



    Photo Credit: Buffalo Business Journal

    Last week, the Buffalo Business Journal did a small write up about the Tonawanda Engine Plant producing the next-generation V8 engines and even snapped a small shot of Steven Flinch, manager of the plant, standing next to one the brand new engines. From this angle, we can make out a few things that quickly jump out, as well as a few things that puzzle us.

    There are a few things on this engine that jump out at us here on GMI, namely those raised parts on the valve cover and the large pulley on the lower driver side. The raised parts are not all the same shape, but they could signal the rumored 3-valve head design that GM had shown in concept form several years at during SEMA. Either that, or it could be there to cover the direct fuel injectors, but that would be a rather stupid to place them under the valve cover.

    Most likely that the injectors are hidden under what looks like to be a two-piece intake manifold and in this picture, the intake is wearing a sound-suppressing cover over the top. You can see the fuel rail connector poking out right above one of the raised parts of the valve cover (has a blue cap on it). We know that direct injection is going to show up in the Gen Vs, but this would be the first time the technology shows up in a overhead valve engine.

    This looks to be a truck version, complete with a taller intake manifold to help develop more torque, just like the current truck engines have. The other bits of the engine look brand new, from the front water pump assembly to the shape of the engine's cylinder heads. The large pulley on the bottom could be an oil pump, giving all the engines a dry sump system that would improve oil pressure as well as increase gas mileage.

    You can even make out a small port sticking out right above the pump that would most likely go to some sort of reservoir mounted elsewhere under the hood. Right now, only the engines built at the Wixom Performance Build Center (LS7, LS9, and LS3) have dry-sump oiling systems which are used to make sure the engine maintains strong oil pressure through high-g turns.

    The last oddity would be the holes in each of the exhaust manifold runners. This last time GM did this, it was part of an system that helped lower emissions levels in engines from the 80's and 90's but within a few years of the third generation small blocks, emission assist systems started to disappear as the engines started to burn cleaner and cleaner. Could this mean that the engines are not as clean burning as the current Gen IVs? Time will tell, but the engine looks as if all the rumors are true, and that this engine is all new, sharing very little with previous versions.

    With the new trucks getting ready to debut in the next few months and the seventh generation Corvette most likely going to debut at Detroit in January, expect to hear more news and see more information about the Gen V engines as time goes on.


    Edit: The ports in the exhaust manifolds are for engine dyno testing to monitor each individual cylinder.
    Last edited by BigAls87Z28; 07-16-2012 at 10:49 PM.
    Alexander Villani
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    Re: First Look: Fifth Generation Small Block Chevy

    can't wait to find out what the stats of the engine are!

    Does anyone have a pic of the current generation V8 with the same view to see side by side?

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    Re: First Look: Fifth Generation Small Block Chevy

    I don't think it is a dry sump engine. If you look closely at the bottom of the engine you see the oil pan and it drops down which indicates a wet sump engine and an a pick up for the oil in the pan. Also given the not yet in production nature of the engine, those ports in the exhaust manifold are probably there for testing and monitoring. But can't wait to here more about this engine.

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    Re: First Look: Fifth Generation Small Block Chevy

    Does this mean you can start telling us the whole story of the GenV V6s and V8s?

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    Re: First Look: Fifth Generation Small Block Chevy

    Pulley on lower left = fuel pump?

    I bet the holes in the exhaust ports are for temperatures for testing only.

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    Re: First Look: Fifth Generation Small Block Chevy

    Thanks Big Al.
    Looking forward for more updates.

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    Re: First Look: Fifth Generation Small Block Chevy

    Test ports for EGT! Bah, good call guys. I'm used to seeing longer header style exhaust manifolds, but you are right
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    Re: First Look: Fifth Generation Small Block Chevy

    Interesting indeed! Can't wait to find out all about the details

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    Re: First Look: Fifth Generation Small Block Chevy

    Since direct injection has to have the injector in the combustion chamber, and the valve cover pretty much covers it up,IMHO, that's the most logical place for it, Plug to one side of center and injector to the other.
    Ed

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    Re: First Look: Fifth Generation Small Block Chevy

    Quote Originally Posted by Z16monte View Post
    Since direct injection has to have the injector in the combustion chamber, and the valve cover pretty much covers it up,IMHO, that's the most logical place for it, Plug to one side of center and injector to the other.
    Ed
    Until a leak develops and dillutes the oil with fuel.
    Just ask the owners of the early Duramaxs' about that. 2001-04 Injectors under the v/c and '04.5+ redesigned to the outside.

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    Re: First Look: Fifth Generation Small Block Chevy

    Exactly why I think those are not for the injectors, you figure they would learn?

    Plus, I don't see where the fuel enters the VC.
    Last edited by BigAls87Z28; 07-16-2012 at 08:22 AM.
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    Re: First Look: Fifth Generation Small Block Chevy

    Agreed on the pump in lower left being a secondary fuel pump if DI is used.
    you figure they would learn?
    A pipe dream I gave up on a long time ago.

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    Re: First Look: Fifth Generation Small Block Chevy

    Any chance for a thread merge?

    GM GEN V V-8 pic

    Beat you fair and square to posting...just sayin...


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    Re: First Look: Fifth Generation Small Block Chevy

    Exciting to see it and its sure to be a technological marvel, but why does GM design the ugliest, least aesthetically pleasing V8 out there? It would be nice if you popped the hood and saw some nice looking valve covers with a Chevy or GM logo on them or an intake manifold with the same, not an ugly plastic cover over the intake. I'm not talking about the plastic covers they will probably put on Camaro and Corvette to hide the coil packs and new bulbous valve covers. Just would be nice to see a "pretty" engine under there. I suppose the power and efficiency will more than make up for it, but one can wish for some looks to go along with it.

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    Re: First Look: Fifth Generation Small Block Chevy

    Given the higher propensity for NOX emissions in ultra high compression engines (the reason to do DI) are we going to see a return to A.I.R. pumps - hence the pulley and the exhaust manifold holes? Just spitballin'.
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