Adnimation ATF

Collapse

MECF_728x90_top

Collapse

Announcement

Collapse
1 of 2 < >

CORVETTE TODAY #179 - CORVETTE NEWS & HEADLINES, MID-SEPTEMBER 2023

Your CORVETTE TODAY host, Steve Garrett, teams up with Keith Cornett from CorvetteBlogger once again to keep you up to date on what's happening in the world of Corvette. Here are a few of the topics Steve and Keith bring you next week. https://youtu.be/JkA5J18FtdE?si=_ClRF7p68zI0V4A4; https://podcasts.adorilabs.com/corve...TQRaY9ZElrdDOZ
1. 1. 2023 Corvette production hits a new milestone
2. The C8 Z06 hits Japan
3. Corvette ranks highest in JD Power's Multi Media Study
4. Is the C8's "Great Wall of Buttons" really going away in 2025?
5. This year's Corvette Hall Of Fame inductees
6. A Batmobile based on a 1992 Corvette sells on Bring A Trailer
Count on CORVETTE TODAY to bring you the latest news in the world of Corvette every other week with your host, Steve Garrett and Keith Cornett from CorvetteBlogger.
2 of 2 < >

2024 & 2023 Corvette Info Including E-Ray, SR & Z06 Pricing, SR & Z06 Visualizers, 70th Anniversary Info, Press Releases for SR & Z06 & Their Build & Price, Order Guides & Visualizers

2024 Order Guide Here: https://www.gmfleetorderguide.com/NA...=22639&type=0#
2023 Corvette Brochure: https://www.chevrolet.com/content/da...D7Q0fp8nIEE57Y
E-Ray Visualizer: https://visualizer.chevrolet.com/ui?...US&channel=b2c
Official E-Ray Press Release: https://www.midenginecorvetteforum.c...-press-release
Official GM E-Ray Pictures: https://www.midenginecorvetteforum.c...and-visualizer
+ 25 KEY E-Ray Components/Factors: https://www.midenginecorvetteforum.c...rs-information
E-Ray Leaked Info/Visualizer: https://www.midenginecorvetteforum.c...tte-e-ray-leak
Z51 & Z06 GM Track Specs: https://www.midenginecorvetteforum.c...ecommendations
Z06 BUILD & PRICE: https://www.chevrolet.com/performanc...d-price/config
Z06 Order Guide: https://www.gmfleetorderguide.com/NA...D=22412&type=0
Z06 MSRP and Options Pricing: https://www.midenginecorvetteforum.c...freight-charge
2023 SR Build & Price: https://www.midenginecorvetteforum.c...up-and-running
*2023 SR & Z06 Official Owners Manual: https://www.corvetteblogger.com/docs...ersManual.pdf; and,
https://www.midenginecorvetteforum.c...owner-s-manual
* 2023 GM Bash Major Seminar with HQ video: https://www.midenginecorvetteforum.c...ore-bash-video
*2023 Stingray Visualizer: https://visualizer.chevrolet.com/ui?...US&channel=b2c
* COPMPLETE 2023 STINGRAY PRICING: https://www.corvetteactioncenter.com...ion-Center.pdf
*2023 Stingray (ONLY Order Guide: https://www.gmfleetorderguide.com/NA...D=22412&type=0
*70th Anniversary Combined Press Release For SR & Z06: https://www.midenginecorvetteforum.c...iversary-model
*Z06 Press Release: https://www.midenginecorvetteforum.c...-press-release
*Z06 Reveal Pictures: https://www.midenginecorvetteforum.c...eveal-pictures
*Z06 Visualizer: https://visualizer.chevrolet.com/ui?...US&channel=b2c
Order Guide (unofficial): https://www.midenginecorvetteforum.c...-action-center
*Z06 vs Z07 Aero Components: https://www.midenginecorvetteforum.c...s-similarities
See more
See less

Tech Article: GM 4.2L, DOHC, 32 Motor

Collapse
X
 
  • Time
  • Show
Clear All
new posts

  • Tech Article: GM 4.2L, DOHC, 32 Motor


    This is an incredibly interesting, technical article on the 4.2 L, 32V, DOHC, "Hot Vee" Motor going into the CT6 V SPort. It is being built within BGA, specifically inside the Powertrain Build Center.

    We learned today, in a separate thread on "Cosworth," that the heads for this motor are being made by the renowned Cosworth Engineering. Also in that article is a note that a complete new manufacturing plant was being built by Cosworth just outside of Detroit, and that a major announcement is coming soon on additional manufacturing of components, perhaps even whole motors, for amajor OEM. Is this facility the location of the ME's 2021+ high performance motors being built. That we will now soon. In the interim, for GM performance motor tech junkies, this article is your brad and butter.

    First our earlier thread about Cosworth's new Plant (again with thanks to member Fasttoys who found this article).

    https://www.midenginecorvetteforum.c...cale-me-motors


    The following technical article about the motor is 14 pages (pictures) long. The last seven of them are in post # 2.


    Now to one of the most interesting, highly technical articles as to GM’s newest V8 motor’s features:

    Click image for larger version  Name:	20B86168-D836-46E9-88EC-6BC352E0B963.jpeg Views:	1 Size:	766.6 KB ID:	10335

    Click image for larger version  Name:	57D0D533-B77E-4E31-AA35-5D532576784F.jpeg Views:	1 Size:	945.6 KB ID:	10336

    Click image for larger version  Name:	91F2859B-CBB7-4B55-8148-35A71DF39D62.jpeg Views:	1 Size:	725.8 KB ID:	10337

    Click image for larger version  Name:	9E245CB1-90B7-4CB8-9289-39F098AE4AB1.jpeg Views:	1 Size:	793.2 KB ID:	10338

    Click image for larger version  Name:	EADE76DE-8479-4C42-8265-5001C7F3156A.jpeg Views:	1 Size:	625.9 KB ID:	10339

    Click image for larger version  Name:	D43732C0-BD3C-4307-9EEF-9C1716088505.jpeg Views:	1 Size:	602.6 KB ID:	10340

    Click image for larger version  Name:	76432BAA-B5F8-401C-955A-2B6DAD0606ED.jpeg Views:	1 Size:	664.3 KB ID:	10341
    Last edited by John; 09-21-2018, 10:52 PM.
    2023 Z06: Elkhart Lake Blue, 2-tone blue interior, HTC, Standard Z06 with Z07 aero pkg, CCB’s, 3LZ, E60, every visible carbon fiber option including wheels, Jake Design Pkg. Lifetime, annual contributors, and 25 year NCM members. Home is the beautiful Pacific Northwest.

  • #2
    The is the last half of the technical article on the latest GM V8 engine.

    Click image for larger version  Name:	0CB98D50-CC06-4DC9-ABCC-F63BF2D1191F.jpeg Views:	1 Size:	802.0 KB ID:	10343

    Click image for larger version  Name:	22E0CC6B-9F03-444B-9EFB-3EF27EF2C2B7.jpeg Views:	1 Size:	820.7 KB ID:	10344

    Click image for larger version  Name:	A5CA604D-8CAD-4C71-800D-39D441D0B108.jpeg Views:	1 Size:	634.7 KB ID:	10345

    Click image for larger version  Name:	C49A137D-B35E-4E23-A3A5-1214D60368D4.jpeg Views:	1 Size:	942.2 KB ID:	10346

    Click image for larger version  Name:	7FB6DB82-DF65-492B-A961-53E14AB5FDD7.jpeg Views:	1 Size:	688.3 KB ID:	10347

    Click image for larger version  Name:	2692E2EC-5C24-405A-9C90-D2DC974C4271.jpeg Views:	1 Size:	432.1 KB ID:	10348

    Click image for larger version  Name:	F9E7158E-9E0F-47FC-BDBE-79004817F6CC.jpeg Views:	1 Size:	436.7 KB ID:	10349
    2023 Z06: Elkhart Lake Blue, 2-tone blue interior, HTC, Standard Z06 with Z07 aero pkg, CCB’s, 3LZ, E60, every visible carbon fiber option including wheels, Jake Design Pkg. Lifetime, annual contributors, and 25 year NCM members. Home is the beautiful Pacific Northwest.

    Comment


    • #3
      Very nice article. So, if we just scale this baby up to 5.5L, we can expect 550*[5.5/4.2] = 720 HP. With a little freer packaging, 800 HP seems quite possible. Very exciting. My guess is the OHV small block may have met its match, but probably not until MY2021-2022.

      Comment


      • #4
        I can not wait to experience the 5.5L ME’s motor, whatever its final specifics are. My personal guess is that the 2020 OHV, LT1+ (whatever GM chooses to call it), will be a 5.5L motor, echoing the C7.R’s and the Cadillac Prototype race cars. And, none of us forget the IHS Markit Engine Forecast which predicted a 5.5L motor for the Y2/ME chassis (as well as a 4.2L version) — though both were listed in the Forecast as being only 32V, DOHC motors in those two sizes.

        https://www.midenginecorvetteforum.c...-consideration
        2023 Z06: Elkhart Lake Blue, 2-tone blue interior, HTC, Standard Z06 with Z07 aero pkg, CCB’s, 3LZ, E60, every visible carbon fiber option including wheels, Jake Design Pkg. Lifetime, annual contributors, and 25 year NCM members. Home is the beautiful Pacific Northwest.

        Comment


        • #5
          Call me crazy but after reading this engine description i believe the corvette c8 version will be slightly smaller in stroke and have a flat plane crank..

          it goes against all logic im sure but thats my best guess..

          i fully exoect to be proven wrong and thats ok. For some reason thats the engine i see in the upcoming higher end corvette models.

          should be quite the laugh when the higher performance models reveal with a larger displacement engine with a cross plane crank And twin turbos

          Comment


          • #6
            Very informative and impressive. The CT6Vsport would be on my buy list when I trade my XTSvsport EXCEPT it comes equipped with summer only wheels/tires. Because the tires and wheels are specifically designed for the CT6Vsport and GM warns only that approved wheel/tire combination can be used, AS tires cannot be substituted like we can with our Corvette. For that kinda full use vehicle I cannot live with the restrictions of summer only tires. Summer only tires are fine for the Corvette cause I only use it in summer only tire conditions i.e. above 40F, no snow, etc.

            Cadillac will also offer a 500 HP CT6 that is equipped with all season tires. That car is on my buy list for 2020 or 2021. Cadillac has put out this info:

            "Also debuting is an all-new Cadillac 4.2-liter twin-turbo DOHC V8, the first of its kind for GM’s top-level luxury brand. In 550-horsepower trim, this clean-sheet engine will power the CT6 V-Sport; a lesser, 500-horsepower version will find its way to non-V-Sport models."

            That tells me the same engine described in this thread albeit with 50HP less will be available in a CT6. That CT6 will be designed/equipped with AS tires allowing it to be driven year around in all wx conditions. Looking forward to that.
            Last edited by Boomer; 09-22-2018, 03:31 PM. Reason: clarity

            Comment


            • #7
              Very informative article John,

              What's amazing to me is how much engineering value we are getting with current and future cars. I have been a hot rod enthusiast all my life, though I never have built one. I'm happy about that now, because I know that no one off car could ever be as problem free and integrated as a new production car, no matter how much was spent on it.

              Vic

              Comment


              • #8
                Originally posted by JBsC6
                Call me crazy but after reading this engine description i believe the corvette c8 version will be slightly smaller in stroke and have a flat plane crank..

                it goes against all logic im sure but thats my best guess..

                i fully exoect to be proven wrong and thats ok. For some reason thats the engine i see in the upcoming higher end corvette models.

                should be quite the laugh when the higher performance models reveal with a larger displacement engine with a cross plane crank And twin turbos
                Maybe, but flat plane cranks work best in SMALL engines. The harmonics get out of control if you go over 4.0L requiring fairly sophisticated engine mounts to prevent excessive chassis vibrations. The Ford 5.0L Coyote flat plane crank reportedly shakes the hell out of the dashboard at certain RPMs.

                I think a balanced crank makes more sense for a big engine with very few performance sacrifices. The CFD-based tailoring of the head, valve port and turbo geometries are much more important than the crank geometry in a 2018 engine design.

                Comment


                • #9
                  With the vibration issues for the flat plane on the Mustang GT 350 that some customers are reporting, I too am not believing that the Corvette ME will have anything else but a balanced crank.
                  2023 Z06: Elkhart Lake Blue, 2-tone blue interior, HTC, Standard Z06 with Z07 aero pkg, CCB’s, 3LZ, E60, every visible carbon fiber option including wheels, Jake Design Pkg. Lifetime, annual contributors, and 25 year NCM members. Home is the beautiful Pacific Northwest.

                  Comment


                  • #10
                    Originally posted by dcbingaman

                    Maybe, but flat plane cranks work best in SMALL engines. The harmonics get out of control if you go over 4.0L requiring fairly sophisticated engine mounts to prevent excessive chassis vibrations. The Ford 5.0L Coyote flat plane crank reportedly shakes the hell out of the dashboard at certain RPMs.

                    I think a balanced crank makes more sense for a big engine with very few performance sacrifices. The CFD-based tailoring of the head, valve port and turbo geometries are much more important than the crank geometry in a 2018 engine design.
                    How does Ferrari build FPC without vibration issues? Small displacement and customers with endless bank accounts so they can spend more on R&D
                    Last edited by Fasttoys; 09-23-2018, 01:45 AM.

                    Comment


                    • #11
                      That’s purely a luxury engine. It’s more like a Rolls-Royce V12 than a Mercedes-AMG Biturbo V8. Corvettes won’t get engines with such a big low end(compared to the top end) on the torque curve. We’ll see higher revving V8s with larger turbos that spool quicker, possibly with dual-injection. They’ll make much more power than the Cadillac 4.2, with minimal to decent decent torque gains.

                      Comment


                      • #12
                        Ferrari uses very large, silicone fluid-filled engine mounts that damp the engine vibrations. The largest V-8 with a flat crank they ever made was the 4.5L in the 458 Italia. Reportedly if / when the engine mount boots crack and lose fluid, the engine can shake the car pretty noticeably. It has happened to older Ferraris, (355's, 430's, etc.). The mounts can readily be replaced, however.

                        Comment


                        • #13
                          Cadillacs engine has a long stroke design. For the chevrolet to increase displacement bore would have to be increased. Does the engine have the cylinder wall delth to accomodate a larger bore and still be capable of higher boost levels?

                          thats why im thinking a slightly smaller displacement kind of makes more sense.

                          should be interesting when details on the corvette tt dohc motor.

                          would gm just have a new block to work with for corvette?

                          get ready to pay much more for this dohc tt engine

                          Comment


                          • #14
                            This is a fascinating read! I am not savvy enough to glean all the details from the paper but the prospect of a version of this to be included in the C8 is quite invigorating.
                            ZORA patron, Forum Founding Member, Senior Contributor, proud owner of a late 2023 Z06! I go to races to watch Corvettes!

                            Comment


                            • #15
                              I too do not understand a bunch within that article, but did learn some good things. I keep hearing from different sources that the 2020’s only motor offered will not be an LT1, but an advanced, smaller displacement engine, yet still a traditional GM V8 OHV motor. Nothing wrong with getting better performance out of a smaller, more efficient motor; if nothing else, a smaller displacement motor will weigh less.

                              And who amount us would not celebrate the C8 weighing less than the C7.
                              2023 Z06: Elkhart Lake Blue, 2-tone blue interior, HTC, Standard Z06 with Z07 aero pkg, CCB’s, 3LZ, E60, every visible carbon fiber option including wheels, Jake Design Pkg. Lifetime, annual contributors, and 25 year NCM members. Home is the beautiful Pacific Northwest.

                              Comment

                              MECF_728x90_bottom

                              Collapse
                              Working...
                              X
                              👍