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Old 11-27-2017, 08:59 PM   #1
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C8 and C7 engine information

Two other forums have credited IHS Markit with finding out the GM North American engine forecast. Smells real, but who knows? Check it out:

Quote:
Nicely-startling in the “Forecast,” it is listed that the maximum output of the gas-powered, direct injection platform of GM’s gas-powered, V-8 motors could be 850 HP, 720 TQ (again, its maximum design parameter) and although probable, nothing in the Forecast specifically shows that that motor would specifically power a future Corvette either at that power lever or reduced somewhat. However, ...the “Cadillac “Sports Cars” has no projected V-8 power-plants for any year through 2024, and he thus concluded that program was “cancelled.” If 850/720 or anywhere near that for the ME, ZORA would be joyous!

I. Two Corvette Platforms for 2020 and 2021: A front-engine platform, called a Y1, and a mid-engine platform, called a Y2.

I have online looked at the “2016-2024 North American Engine Forecast” for several days, and it shows there would be two different Corvette platforms for both 2020 and 2021. And, there would be a total of three motors spread over the two Corvette platforms, specifically:

1.A) A 6.2L, 16V, OHV, for the Y1, front-engined, Corvette platform;

1.B) A 6.2L, 16V, OHV, for the Y2, mid-engined, Corvette platform;

2) A 4.2 L, 32 V, DOHC, for the Corvette Y2 platform; and,

3) A 5.5L, 32 V, DOHC, also for the Corvette Y2 platform.

II. Corvettes’ Projected Future Motor Needs:

A) The 6.2L, Y1 front-engine platform, is projected to use 14,000 motors for 2019, declining significantly for 2020 to 9,000; and even more for 2021 with just 3,000 engines that year — and no more front-engined Corvettes are listed after 2021. Guessing here, that perhaps that the 9,000, 6.2L’s will go into 2020 & 2021 Z06’s, and the much lower amount of 3,000 6.2L’s projected for 2021, will go into ZR1’s (the last year of the ZR1)?

B) The 6.2L, Y2 mid-engine platform, is projected to use 14,000 motors for 2019 through 2021, then slightly less for 2022-2024.

C) The 4.2L, Y2 platform, is projected to use 7,000+ motors every year 2019 through calendar year 2024. (All 4.2L’s would be produced at Tonawanda.)

D) The 5.5L, Y2 platform, is projected to use 5,000 motors annually 2019 through 2023. None are listed for 2024. (All 5.5L’s would be produced at Tonawanda.)


It is very interesting to see that while BGA is currently making many over 10,000 motors annually, then projected to make half that many through 2021, by the very end of this time forecast time period (2024), it would only then be producing only 1,000 — becoming at that time only a “build your Corvette motor option” engine assembly location?

Thus, based on this new info, it is probable that the C7 continues onward after 2019 for two more years (2020 & 2021), being produced simultaneously with the C8/ME those two years,m with the mid-engine’s three motor options (the 4.2L, the 5.5 L, and the 6.2L) all continuing through at least 2023.

Of course, the Forecast is just that, and while it is scientifically and thoroughly researched and prepared, and it is very highly respected, there well could be continued future changes in projections especially as market conditions continue to evolve, i.e., why it is periodically and systematically revised.
The C8 totals at 26,000 gas units from 2019 - 2023 + eRays PER YEAR.
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Old 11-27-2017, 09:11 PM   #2
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OK gang, what do you think the chances are of selling an average of 26,000 Mid Engine Corvettes globally over a 5 year design cycle if the price is:

1) $200,000
2) $150,000
3) $125,000
4) $100,000
5) $85,000
6) $75,000
7) $65,000

If the "forecast" is correct, we will see a C8 Zora, a C8 Z06, and and a C8 ZR1 so mentally price these three models out and end up with an AVERAGE of 26k units per year.
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Old 11-27-2017, 11:07 PM   #3
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1) $200,000 10%
2) $150,000 20%
3) $125,000 50%
4) $100,000 75%
5) $85,000 90%
6) $75,000 95%
7) $65,000-100%
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Old 11-28-2017, 01:50 AM   #4
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I completely agree Grumpy, but I don't know if GM will price it at the 100% level. They might just set it at the 95% or the 90% level but it just makes no sense to price it at the $100k level.
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Old 11-28-2017, 04:24 AM   #5
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I think Grump hit the nail on the head. If the General can keep it under the 6 figure mark even at $99,950 the will do alright. When you hit 100K people will generally start backing away
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Old 11-28-2017, 07:16 PM   #6
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Below $100k and well equipped. IMO.
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Old 12-13-2017, 05:34 AM   #7
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This is going to upset some, however that list isn't a reliable list..... so don't expect to see the engines in that list to come into existence. though a 4.3L OHV 36 valve V-6 would be an interesting engine, I don't think that we will see it. The 4.2L engine is going into Cadillac though based on that list Cadillac doesn't get it and the 5.5L (beating a dead horse).
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Old 12-13-2017, 07:36 AM   #8
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The C8 looks to be very Promising from what I have read.

The price tag to own it is pretty high. Only downfault.

The C7 ZR-1 production was cut short.
Finally got a Big Supercharger to cut down on IAT's and make clean Boost Power.
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Old 12-14-2017, 01:26 AM   #9
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Quote:
Originally Posted by Maniacmechanic1 View Post
The C8 looks to be very Promising from what I have read.

The price tag to own it is pretty high. Only downfault.

The C7 ZR-1 production was cut short.
Finally got a Big Supercharger to cut down on IAT's and make clean Boost Power.
I read a quote from GM that it needed an 11 rib belt to keep from slipping and that belt robs 110 HP. Seems like this realization might drive a move to Turbocharging in the next gen.
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Old 12-14-2017, 07:28 AM   #10
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Quote:
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I read a quote from GM that it needed an 11 rib belt to keep from slipping and that belt robs 110 HP. Seems like this realization might drive a move to Turbocharging in the next gen.
That is normal Horsepower consumption for a Roots style Supercharger with High Helix rotors or straight lobe cut rotors.
And also for Large Centrificagul Superchargers like Pro Charger, Vortech, & Paxton / East Coast Superchargers.

Think of it as a Normal Aspirated engine making 500-550 HP.
The Supercharger Boost pushes the measured power level to 800 HP.
Its actually 900 + Hp being created but parasitic losses brings the power level down to 800 HP.

Turbo Charging causes similar parasitic losses but tends to be more efficient.
Problem is the the Turbo boost lag.

It can be set up to hit super hard..one guy at the the race shop , my work hit a 1.1 60 foot with his twin turbo LS powered race car in Florida 2 days ago.
3.55 rear differential gears & 2-speed powerglide trans.

Trick is giving the power clean and smooth that Corvette drivers expect.
Refinement.
100 % reliability.
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Old 12-14-2017, 04:42 PM   #11
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Wonder if they have been able to develop a 12V electric motor that could efficiently spin an SC this size. If not, maybe Turbocharging is smarter. TT would likely keep the vertical height lower and might be lighter than this big SC set up.
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