Corvette Manta Ray: GM's bold new plan
12-07-2018, 04:12 PM
#281
Le Mans Master
Holy cow, this thread and all the information within it just popped up in my MSN news feed. That's freakin' crazy!
12-07-2018, 04:22 PM
#282
E-Ray, 3LZ, ZER, LIFT
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Hmm, the Ford GT has a 3.5 Liter Twin Turbo, Double Overhead Cam V6 with 647 hp. One 57% bigger could be a beast! 
For all those "nothing beats cubic inches" big pushrod V8 folks suggest you'all better do as I did and get an 8.2 Liter Chevy Crate motor and put in your ride of choice! In fact you can buy two hp versions of a 572 cid Chevy Crate motor now (one with 720 hp off the shelf from Chevy!) Have seen a number of those large cid engines in '67 to '69 Camaros at car shows!
For all those "nothing beats cubic inches" big pushrod V8 folks suggest you'all better do as I did and get an 8.2 Liter Chevy Crate motor and put in your ride of choice! In fact you can buy two hp versions of a 572 cid Chevy Crate motor now (one with 720 hp off the shelf from Chevy!) Have seen a number of those large cid engines in '67 to '69 Camaros at car shows!
Last edited by JerryU; 12-07-2018 at 04:25 PM.
12-07-2018, 04:37 PM
#283
Maybe this is"I WISH GM WOULD DO THIS" maybe some is true...SO why ISN'T gm EVEN ACKNOWLEDGING THAT THE CAR EXISTS?? So after over 100 years GM is going to have a plan like that and they still make BUICK. Where are these execs coming from to implement this new BOLD PLAN??
12-07-2018, 04:54 PM
#284
E-Ray, 3LZ, ZER, LIFT
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GM sells cars to dealers, who sell them to customers. No doubt dealers are reducing their purchases now in anticipation of buying C8s to sell.. If GM announces their exact plans too soon to satisfy folks curiosity, how may C7's would you expect the dealers to buy?? GM will provide incentives for dealers to push C7's off the lot when they introduce the C8. All costly.
Last edited by JerryU; 12-07-2018 at 04:55 PM.
12-07-2018, 05:08 PM
#285
Safety Car
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Maybe this is"I WISH GM WOULD DO THIS" maybe some is true...SO why ISN'T gm EVEN ACKNOWLEDGING THAT THE CAR EXISTS?? So after over 100 years GM is going to have a plan like that and they still make BUICK. Where are these execs coming from to implement this new BOLD PLAN??
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12-07-2018, 05:13 PM
#286
I want to believe
12-07-2018, 05:19 PM
#287
Drifting
I don't see how that's possible @ 6.2L given current emissions standards. In order to create those #'s it would need quite a bit larger camshaft than what's currently int he LT1. It would also need to rev a bit higher as peak HP would need to be +6500RPM, likely necessitating port fuel-injection in compliment to the current DI only.
https://www.chevrolet.com/performanc...ines/lt376-535
Last edited by bigsapper; 12-07-2018 at 05:56 PM.
12-07-2018, 05:28 PM
#288
Melting Slicks
Yes, It Is Crazy
Especially since it is all based on rumors and the author said he is not a GM or Corvette insider. How about this for crazy: Corvettes will be sold at Buick and GMC dealers according to the author.
Last edited by PCMIII; 12-07-2018 at 05:29 PM.
12-07-2018, 06:19 PM
#289
E-Ray, 3LZ, ZER, LIFT
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Fine for a street rod or perhaps drag racing but no big deal for a DD! We'll see if GM really keeps the pushrod V8 in the C8 for a little longer!
Last edited by JerryU; 12-07-2018 at 06:20 PM.
12-07-2018, 06:34 PM
#290
Race Director
12-07-2018, 07:21 PM
#291
Drifting
First it's SAE rated HP at the crank, as is all their published HP figures since, oh I don't know, 10 or 15+ years. Second it addresses the person I was responding to, that stated they can't make an emission legal 520hp LT1. It's trivial.
ETA: Further, there's no port injection on that crate engine and it probably still has the LT1 fuel system. I think it's been pretty well proven out, that the stock LT1 fuel system can support near 600hp on 93 pump gas.
ETA: Further, there's no port injection on that crate engine and it probably still has the LT1 fuel system. I think it's been pretty well proven out, that the stock LT1 fuel system can support near 600hp on 93 pump gas.
Last edited by bigsapper; 12-07-2018 at 07:24 PM.
12-07-2018, 07:25 PM
#292
Team Owner
12-07-2018, 08:57 PM
#293
Burning Brakes
IF you can rev an LT1 block to 7000 rpm, then you make 525 HP out of 6.2L NA. The big change would be in the valvetrain and the transmission. The DCT should be capable of higher rpm to mate with the follow-on DOHC engines. The OHV valvetrain could easily be enhanced to allow higher rpms. NASCAR engines rev. all day to 8500 rpm.
12-07-2018, 09:04 PM
#294
Melting Slicks
IF you can rev an LT1 block to 7000 rpm, then you make 525 HP out of 6.2L NA. The big change would be in the valvetrain and the transmission. The DCT should be capable of higher rpm to mate with the follow-on DOHC engines. The OHV valvetrain could easily be enhanced to allow higher rpms. NASCAR engines rev. all day to 8500 rpm.
What could be going on that Corvette thinks a 5 year old car with no upgrades would be saleable at over $50K?
12-08-2018, 12:01 AM
#295
I heard this general plan for the Corvette and Camaro a year or so ago. Kind of shocked that GM would abandon those "base" model FE Corvette sales but the Camaro ZL1 1LE really cracked some heads on the track and for all of 70K!
Im excited to see a twin turbo mid engine Vette just crush everything. I just hope my wallet can afford it
Im excited to see a twin turbo mid engine Vette just crush everything. I just hope my wallet can afford it
12-08-2018, 06:07 AM
#296
E-Ray, 3LZ, ZER, LIFT
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Yep, but remined of what Dale Inman (Richard Petty's Race Team Manager at the time) said when I asked about the 00 (or some such low weight engine oil being used for extra power) if that was good for the engine? He said: "For the 500 miles we need it to be!"
Currently 500 cid NHRA Prostock engines are limited to turning 10,500 rpm. They were reaching over 12,000 rpm before the current limit was imposed.
Current F1 engines are limited to 15,000 rpm! A few years ago they were spinning them at 19,000 rpm! Of interest in 1994 a Ferrari NA F1 engine was a 3.5 Liter V12 producing 650 hp @ 13,000. The 1.6 Liter current F1 engines are producing over 850 hp(without the extra 160 hp from KERS.) The power of turbos! But also important they are no longer allowed to refuel so todays F1 engines are over 50% more efficient! They are also only allowed to use 4 engines for the 22 races/year which includes 2 practice and a qualifying session. F1 has tried to be responsive to what needs to be done in automotive engineering while putting on a great show! Just takes lots money to play!
Suggest all get used to the idea of a higher spinning, smaller cid, more efficient, turbo engine in their Vettes!
Currently 500 cid NHRA Prostock engines are limited to turning 10,500 rpm. They were reaching over 12,000 rpm before the current limit was imposed.
Current F1 engines are limited to 15,000 rpm! A few years ago they were spinning them at 19,000 rpm! Of interest in 1994 a Ferrari NA F1 engine was a 3.5 Liter V12 producing 650 hp @ 13,000. The 1.6 Liter current F1 engines are producing over 850 hp(without the extra 160 hp from KERS.) The power of turbos! But also important they are no longer allowed to refuel so todays F1 engines are over 50% more efficient! They are also only allowed to use 4 engines for the 22 races/year which includes 2 practice and a qualifying session. F1 has tried to be responsive to what needs to be done in automotive engineering while putting on a great show! Just takes lots money to play!
Suggest all get used to the idea of a higher spinning, smaller cid, more efficient, turbo engine in their Vettes!
Last edited by JerryU; 12-08-2018 at 06:34 AM.
12-08-2018, 09:04 AM
#297
Melting Slicks
Actually, Cosworth purportedly made it to 21,000 rpm. Here is a video of it testing at 20,000. I remember listening to it at the Canadian GP in Montreal and reading about it when it happened. It was a screamer !
Last edited by skank; 12-08-2018 at 09:11 AM.
12-08-2018, 12:18 PM
#300
Le Mans Master
Suggest all get used to the idea of a higher spinning, smaller cid, more efficient, turbo engine in their Vettes! [/QUOTE]
Sure. I guess I ll have to keep my outmoded, obsolete '12 ZR1 LS9, with the motor in the front and a short deck. A real Vette.
[/QUOTE]Sure. I guess I ll have to keep my outmoded, obsolete '12 ZR1 LS9, with the motor in the front and a short deck. A real Vette.