C8.R packs in flat-plane V8

Reply Subscribe

Thread Tools

Search this Thread

12-09-2018, 12:00 PM

#101

Foosh

Team Owner

Member Since: Oct 2004

Posts: 25,434

Likes: 7,582

Received 16,668 Likes on 8,311 Posts

Quote:

Originally Posted by JerriVette

flat plan cranks tend to be under 4liters in displacement due to harmonic imbalance difficulties..

cadillacs 4.2could become 3.9 liters with a flat plan crank...

that i could believe.

5.5 liters could be a difficult challenge

fords gt350 has had some vibration challenges over time i believe.

All true above, and the part in bold could well end up being the GTLM engine. IMSA rules require they they be derived from a production engine, and forced induction engines must be under 4L. That would meet both criteria, and it's possible that's what we heard in the Sebring video.

Whether a Cadillac 4.2-derived FPC can reliably stay alive near redline for 24 hours will have to be determined in testing.

Last edited by Foosh; 12-09-2018 at 12:05 PM.

Reply Like

12-09-2018, 02:13 PM

#102

MitchAlsup

Le Mans Master

Member Since: Aug 2000

Location: Austin Texas

Posts: 5,042

Likes: 61

Received 1,592 Likes on 784 Posts

Quote:

Originally Posted by sunsalem

Yes, they did do it first.

In america maybe,
Ferrari 1975 with the 308 V8 flat plane crank.

Reply Like

The following users liked this post:

sunsalem (12-10-2018)

12-09-2018, 02:27 PM

#103

vetteman41960

Burning Brakes

Member Since: Sep 2014

Posts: 969

Likes: 1,193

Received 1,051 Likes on 442 Posts

Quote:

Originally Posted by Foosh

IMSA hands out waivers like candy. Porsche move rear engine to mid engine even though you can't purchase a 911 with mid engine.

BMW 4.4 lt TT in the M8 . I would think that GM could get a waiver for the 4.2 TT.

GM went to the 5.5 lt in the C6R to be compliant but BMW ran a 8cy in the m4 when you could not by that engine in the production car. M4 cane with a 6cyc.

I would think GM would much prefer to run the engine that come in the street car.

Win on Sunday sell on Monday!!

Reply Like

The following users liked this post:

sunsalem (12-09-2018)

12-09-2018, 04:06 PM

#104

rmorin1249

Le Mans Master

Member Since: Sep 2012

Location: Hagerstown MD

Posts: 6,876

Likes: 1,268

Received 1,738 Likes on 1,174 Posts

St. Jude Donor '15-'16,'18

The Z4 was never sold with a V8 but BMW raced it in IMSA for several years. They are desperate for GTLM cars. They will probably waive anything to ensure Corvette stays and is competitive. Only 2 US manufacturers left in GTLM, Chevy and Ford.

Last edited by rmorin1249; 12-12-2018 at 10:02 AM.

Reply Like

12-09-2018, 04:23 PM

#105

Foosh

Team Owner

Member Since: Oct 2004

Posts: 25,434

Likes: 7,582

Received 16,668 Likes on 8,311 Posts

Nah, I know the street Ford GT is assembled in a speciality shop in Canada, but they are not the manufacturer, just the assemblers. BMW's are also built in the USA, but I don't consider them a US manufacturer.

Interestingly, enough the BMW GLTM cars are built at Rahal Letterman Lyman Racing in Ohio. The Chip Ganassi FGTs are built in Indiana.

Reply Like

12-09-2018, 04:32 PM

#106

rmorin1249

Le Mans Master

Member Since: Sep 2012

Location: Hagerstown MD

Posts: 6,876

Likes: 1,268

Received 1,738 Likes on 1,174 Posts

St. Jude Donor '15-'16,'18

U r right but I discount the Ford as it is a race car that is made in very limited numbers as a street car. Then again the Porsche midengine is also not sold as a street car. IMSA should combine GTD and GTLM. The GTLM field is pretty pathetic IMHO.

Last edited by rmorin1249; 12-12-2018 at 10:02 AM.

Reply Like

12-10-2018, 12:34 PM

#107

sunsalem

Race Director

Member Since: Sep 2014

Posts: 11,905

Likes: 2,742

Received 2,146 Likes on 1,521 Posts

Quote:

Originally Posted by rmorin1249

They are desperate for GTLM cars. They will probably waive anything to ensure Corvette stays and is competitive.

No doubt of that.
NO manufacturer has put more time and effort into ALMS/IMSA than GM.
I sincerely doubt the Powers-That-Be with the series won't readily agree to anything Corvette Racing wants to do.

Quote:

Originally Posted by rmorin1249

IMSA should combine GTD and GTLM.

I don't know about that...GTD seems to be very popular with teams that don't have nearly the budget of GTLM manufacturers.
Nonetheless, your idea does have a lot of merit IMO.

Quote:

The GTLM field is pretty pathetic IMHO.

Agreed.
We need more entries, but I'm not sure how to pull that off.

Reply Like

12-11-2018, 02:39 PM

#108

Foosh

Team Owner

Member Since: Oct 2004

Posts: 25,434

Likes: 7,582

Received 16,668 Likes on 8,311 Posts

It wouldn't be easy, but one solution is finding a way to merge GTLM and GTD. The problem will be harmonizing between FIA/WEC and IMSA.

Reply Like

12-11-2018, 06:00 PM

#109

RickConti@Coughlin

Safety Car

Member Since: Nov 2011

Posts: 3,814

Likes: 59

Received 1,554 Likes on 557 Posts

Quote:

Originally Posted by King Dranzer

With the leaked audio clip C8.R sound in which the engine sounds smooth and deep. It can most-probably be result of Flat-Plane crank. First I thought it was due to implementation of Turbos, but turbos cannot make Corvette Cross-plane V8 sound like that nor can exhaust system. Yes I realize that it is not official but the audio clip of the C8.R sound make it sound more like European V8 and only deduction for it can be inclusion of flat-plane crank instead of cross-plane.

Audio Clip of C8.R:
https://sportscar365.com/industry/au...-turbo-engine/

Finally Chevrolet decides to drop in Flat-plane V8 in Corvette. Never thought they will drop it in so soon. This video makes my point even strong.

Sound of C8:
https://www.youtube.com/watch?v=TyV8K7Vrp7k

This video makes my point of it being FPC V8 even strong.

Latest Reveal Possibly a Hint:
https://www.youtube.com/watch?v=eV4Q7ZTTP5Y

This video at 6:04Min and 6:34Min makes my feeling about it being FPC even stronger

C8-R Sound on Track:
https://www.youtube.com/watch?v=fbUBMpl2DuY

Sounds lot different than traditional American V8.

Thanks for the mention, in a follow up video , we mentioned in below Vlog, NEW YORK AS THE BEST POSSIBLE CHOICE, now if an internal delay does not hold it back, this will be historic!

Reply Like

12-12-2018, 03:37 AM

#110

King Dranzer

Instructor

Thread Starter

Member Since: Nov 2017

Posts: 109

Likes: 4

Received 26 Likes on 15 Posts

Quote:

Originally Posted by RickConti@Coughlin

Thanks for the mention, in a follow up video , we mentioned in below Vlog, NEW YORK AS THE BEST POSSIBLE CHOICE, now if an internal delay does not hold it back, this will be historic!
https://youtu.be/6kfCM-AcSZU

Hope it hits in at NEW YORK. It will be real disappointment if there is any delay.

Reply Like

12-13-2018, 01:48 AM

#111

BullittEV

Pro

Member Since: Nov 2014

Location: San Diego/Pacific Beach CA

Posts: 534

Likes: 13

Received 44 Likes on 32 Posts

Quote:

Originally Posted by SocraticCrystlMethod

FPC is a fad, who cares about that? It increases vibration and harshness for no actual benefit.

and it's not meant to last. I don't see why the c8 engineers would do this? Is it just meant for the C8.R? totally different crank case?

I don't know, they really are keeping it under wraps hard. I need them to release it so I can buy a C7 GS 2LT+ with under 10k miles for ~50K. almost there.

Reply Like

12-14-2018, 01:52 AM

#112

JMLS

Instructor

Member Since: Mar 2012

Location: Santa Barbara California

Posts: 146

Likes: 119

Received 75 Likes on 36 Posts

what I've learned from all of this is:

I could fart into an empty soda can and get the entire internet arguing over whether it was Chewbacca or an FPC or funky headers

Reply Like

The following 2 users liked this post by JMLS:

FringbirdAloha (08-30-2019), sunsalem (12-14-2018)

08-29-2019, 11:29 AM

#113

King Dranzer

Instructor

Thread Starter

Member Since: Nov 2017

Posts: 109

Likes: 4

Received 26 Likes on 15 Posts

FPC will not be limited to C8.R model. Will be used in all the versions up of base model. That will be crazy if true.

Reply Like

08-30-2019, 11:33 AM

#114

King Dranzer

Instructor

Thread Starter

Member Since: Nov 2017

Posts: 109

Likes: 4

Received 26 Likes on 15 Posts

Corvette C8 Lineup to have Flat-Plane-Crank and Hybrid System up the Line
https://www.caranddriver.com/news/a2...hybrid-engine/

Reply Like

The following users liked this post:

BOBSZ06 (08-30-2019)

08-30-2019, 12:28 PM

#115

FringbirdAloha

Burning Brakes

Member Since: Sep 2018

Location: Desert

Posts: 844

Likes: 2,875

Received 729 Likes on 309 Posts

Quote:

Originally Posted by likeaboss

That's called a Shelby GT350 since Ford did it first. I am a little concerned about the move to the FPC because in the case of said Ford it was the least mod friendly Mustang to date.

gT350 sounds like a fartcan with marbles in the exhaust pipe, please ~~GOD~~ GM don’t let the C8 Z06 sound like this or rattle itself to death, and burn oil constantly.

Reply Like

08-30-2019, 12:32 PM

#116

fatsport

Melting Slicks

Member Since: Aug 2017

Location: Fl

Posts: 2,412

Likes: 1,004

Received 894 Likes on 538 Posts

Quote:

Originally Posted by FringbirdAloha

gT350 sounds like a fartcan with marbles in the exhaust pipe, please ~~GOD~~ GM don’t let the C8 Z06 sound like this or rattle itself to death, and burn oil constantly.

Go away. Enjoy your 500 hp truck motor.
GM put the dinosaur motor in there just to make sure they got 1 thing without problems. It sure doesn’t fit the rest of the car.

Reply Like

The following 3 users liked this post by fatsport:

Kane00ZR1 (08-30-2019), smoove7410 (10-07-2019), TraxsterII (09-05-2019)

08-30-2019, 02:03 PM

#117

King Dranzer

Instructor

Thread Starter

Member Since: Nov 2017

Posts: 109

Likes: 4

Received 26 Likes on 15 Posts

This will definitely be nothing like Ford GT350. That C8 engine sounds too exotic.

Reply Like

10-07-2019, 12:44 PM

#118

King Dranzer

Instructor

Thread Starter

Member Since: Nov 2017

Posts: 109

Likes: 4

Received 26 Likes on 15 Posts

Corvette C8-R Teaser:

Now the only thing is for the Chevrolet to officially announce the specs. I am 100% sure it is FPC V8 and not V6 or Turbo V8 with some special exhaust.

Reply Like

10-07-2019, 12:49 PM

#119

FringbirdAloha

Burning Brakes

Member Since: Sep 2018

Location: Desert

Posts: 844

Likes: 2,875

Received 729 Likes on 309 Posts

Quote:

Originally Posted by likeaboss

That's called a Shelby GT350 since Ford did it first. I am a little concerned about the move to the FPC because in the case of said Ford it was the least mod friendly Mustang to date.

Maybe, but the GT350 sounds like the fart can exhaust you find on the 4 cylinder tuner crowd cars but with a V8 engine behind it. It sounds nothing like a Ferrari or even the engine in this C8R video!

Reply Like