Announcement

Collapse
No announcement yet.

Forum Top Advertisment

Collapse

C8 Z06 will probably be DOHC flat-plane V8

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • C8 Z06 will probably be DOHC flat-plane V8

    https://www.motortrend.com/news/c8-c...win-turbo-v-8/

    Holy want Batman!

    Last edited by emilio700; 08-26-2019, 11:03 AM.
    WWW.949RACING.COM
    SuperMiata

    Aside from their cost I never understood why people race them.
    But obviously I just dont get it. -fatbillybob

  • #2
    Sounds so good.
    SuperMiata S2 Class #33

    Comment


    • #3
      It will be interesting to see the retail cost delta.

      Comment


      • #4
        it has a big ass diffuser (at 1:20), can't possibly be production...this is the new race car?
        Last edited by bellwilliam; 08-26-2019, 10:40 PM.
        S1 Supermiata - 220whp
        13 Tesla, ma: no engine !!
        17 GT350R
        03 Miata Club Sport
        96 NSX
        06 EVO MR
        15 Mini Cooper S
        Beck 550 Spyder

        Comment


        • #5
          Originally posted by bellwilliam View Post
          it has a big ass diffuser (at 1:20), can't possibly be production...this is the new race car?
          No production pics published that I know of. Just GTLM/ GTE proto and some design concepts done by the magazines. No telling what it would actually look like. Although it would make sense for it to have at least a small diffuser.
          WWW.949RACING.COM
          SuperMiata

          Aside from their cost I never understood why people race them.
          But obviously I just dont get it. -fatbillybob

          Comment


          • #6
            I hope it's reliable. We all know of a certain other flat plane V8 car that is known to go BOOM. Engine vibrations galore.
            SuperMiata S2 Class #33

            Comment


            • #7
              I had to look it up, so I figured I'd share what I found: MAHLE Jet Ignition® enables homogeneous ultra-lean combustion in modern gasoline engines. It uses two direct injection systems. Very clever.



              The MAHLE Jet Ignition® system is a new combustion technology which replaces the standard spark plug in SI engines with a jet ignition chamber assembly. MAHLE Jet Ignition® facilitates the implementation of ultra lean-burn operation in gasoline engines, improving their efficiency and reducing the formation of pollutants such as nitrogen oxide and particulates.

              Inside the jet igniter assembly is a small ignition chamber with a direct injector (DI) that provides a small amount of auxiliary fuel (<5% of the total system fuel) and a spark plug to ignite that charge. The ignition chamber is connected to the main chamber by a number of orifices which allow jets of partially combusted products to ignite the main charge. The smaller orifice size causes turbulence in the hot gas jets which then penetrate deeper into the main combustion chamber and cause an evenly distributed ignition effect. The main chamber is fuelled through a conventional port or direct-injection injector. With 4-8 ignition jets, depending on the application, the main charge is extensively ignited and a faster burn-through and pressure build-up is generated. Furthermore, this process allows increased compression ratios (a 4 point increase in some applications) combined with lower combustion temperatures and reduced throttling / pumping losses to achieve peak indicated thermal efficiencies up to 45%.

              The MAHLE Jet Ignition® system’s combustion is much quicker than with standard spark ignition, enabling the engine to operate at optimum spark timing as the knock limit is extended significantly. In car engines, high fuel savings are achieved by the higher, almost diesel-like efficiency. Engine tests show specific consumption below 200g / kWh and significant related reductions in CO2 emissions. In addition to providing efficiency and fuel consumption advantages, MAHLE Jet Ignition® also achieves reductions in engine-out NOx emissions by more than 99 per cent in the ultra-lean area. Hydrocarbon (HC) emissions are maintained at levels equivalent to standard spark ignition operation. MAHLE Jet Ignition® (with a PFI main chamber) generates slightly elevated particulates compared to a PFI engine but these are significantly reduced versus a DI engine.

              In “passive” guise, the MAHLE Jet Ignition® pre-chamber contains only a spark plug, and fuel is delivered to the pre-chamber through the nozzle orifices during the compression stroke. The operating principle of a passive system is consistent with that of an “active” system. Passive MAHLE Jet Ignition® produces shorter burn durations which reduce the tendency of the engine to knock at high loads, thereby increasing peak power and efficiency.

              MAHLE Jet Ignition® is an exciting new combustion system that provides great potential for further CO2 emissions reduction in latest generation gasoline engines.


              www.TrackHQ.com

              Comment


              • #8
                Corvette is an imitator, albeit a great one, not an innovator. That 1st production car tech will be seen in a ferrari or mclaren street car. Then others will follow until porsche does it. Them maybe we see it in vettes or other cars only if the cost benefit pencils out. Its a math problem

                Comment


                • #9
                  I dunno Carl. My math would be licensing fee to Mahle + R&amp;D + production weighed against being able to use a smaller engine and reach a higher power level. The value of say a 3.8L making 800bhp vs a 4.4L making "only" 650bhp might be worth it. The only reason I brought it up is that logically, the Z06 engine should be small. Makes more room for turbos and those huge heads. So any tech that allows it to reach their presumed target of over 750bhp, might be worth it.

                  The interesting question to me is the potential rebranding of the exhaust note. Even the C8 has a rumbly V8 exhaust note. That's a direct genetic line to the C1 65 years ago. That sound, like a Harley's lope is an intrinsic part of the Corvette brand. If the C8Z is a small flat plane with double whooshies.. it's gonna sound exactly like a Ferarri 488. Ford got around the potential similarity of the Voodoo by rearranging the firing order and header configuration. The spiel was that it was a packaging issue bu that's BS. They didn't want the GT350 to sound like a Ferrari/Lambo/Audi et al.

                  That said, the proto racecar in the video sure sounds like a Ferrari. That's not bad thing IMO.
                  WWW.949RACING.COM
                  SuperMiata

                  Aside from their cost I never understood why people race them.
                  But obviously I just dont get it. -fatbillybob

                  Comment


                  • #10
                    Collateral video from UCFBrett's post:




                    Last edited by Loose Caboose; 08-28-2019, 10:22 AM.

                    Comment


                    • #11
                      ooh!
                      C& D thinks the Z06 will be N/A and maybe 5.5L. I am moist.
                      Come on GM, make it lighter. Make it lighter. Make it lighter..

                      https://www.caranddriver.com/news/a2...hybrid-engine/
                      WWW.949RACING.COM
                      SuperMiata

                      Aside from their cost I never understood why people race them.
                      But obviously I just dont get it. -fatbillybob

                      Comment


                      • #12
                        Not the biggest fan of direct injection from a reliability stand point. I hope they put a big catch-can on it or some sort of filter system to clean up the PCV circuit for the sake of the injector's longevity and reliability.
                        SuperMiata S2 Class #33

                        Comment


                        • #13
                           
                          SuperMiata S2 Class #33

                          Comment


                          • #14
                            Originally posted by ucfbrett
                            Maybe a silly question, but is cross plane the same as a flat plane?
                            No. Cross planes have 90° rotation between crank throws whereas flat planes have 180°. Most production engines are cross plane cranks.

                            Comment


                            • #15
                              This short video does a good job showing the scavenging benefits (among others) of the flat plane:

                              Comment

                              Working...
                              X