[TrackClub]

Interesting thoughts. No question 5.5L TT will be capabale of big power given 4.2L TT Caddy's new motor.

But if NA 5.5 will have issues getting to 600hp with decent torque and proper reliability then perhaps that rumour is false and thats why reworked LT1 will still be around as a base NA motor? Who knows...

And what would they put in a Z28 given Big Al's comments this car will never have FI motor? NA plus electric? Or maybe Z28 no more?

Fun speculating in any case!

[doc7000]

There are no good rumors of the upcoming mid engine performance car from GM, there certainly are no good engine rumors around.

That third party list created and leaked some time ago wasn't generated by or with the help of car makers therefor there was a ton of leaks, rumors, and future product development plans put forward by car makers which might change.

For example on this list the GM trucks will pack a 4.3L pushrod 36 valve (6 valve per cylinder) engine. That list was flat out not a reliable source of information. So to sit there and act as if based on that list we will definitely get these engines you are going to be disappointed.

Also that list wasn't new meaning the 5.5L engine rumor really came from the rumor that was going around before the launch of the C7 Corvette. That rumor stated that GM wanted to have a better connection between the race car and the road car, the GT2 spec race car started life with a 6.0L engine however a rule change capped displacement at 5.5L forcing them down from the old cap of 6.0L.

However that was a possibility though they went with producing a (in their view) better street engine. Sticking with 6.2L means that in AFM mode it is a 3.1L engine, the benefit there was being a bigger engine means more time in 4 cylinder mode. Also sticking with 6.2L over 5.5L means that the engine produced more torque and as a result doesn't have to rev as high to make power.

Much like the LT5 engine was going to be a 6.2L DOHC 700BHP engine after that VIN list came out and how many automotive publication ran with that? as if it was fact?. Once more we have automotive press running with rumors that they likely get from forums just like this one and shockingly when there is a lack of automotive news to report on. This makes the automotive press not a reliable source of rumors and leaks as you don't know which ones are coming from forums and which ones are coming from inside sources. On top of that you can't reveal your leak if it is someone on the inside as it will result in a loss of job for that person and potentially a law suit of that person.

[TrackClub]

No good rumours of a mid engine car?
Does it mean GM has been running the mid engine mule for many months now just for fun?
Just saying...

As for the rumours, agree, they are just that and nothing more but the new Caddy motor shows the future imo.

[doc7000]

Originally Posted by TrackClub

No good rumours of a mid engine car?
Does it mean GM has been running the mid engine mule for many months now just for fun?
Just saying...

As for the rumours, agree, they are just that and nothing more but the new Caddy motor shows the future imo.

No good rumors as in we don't know anything about it except that it exist, the 4.2L Cadillac motor is a Cadillac exclusive. Even if that ends up changing that particular block won't scale up to 5.5L so if there is going to be a 5.5L DOHC motor we still have yet to see anything on it. The bore is so small that it probably flows about half of what the LS7 head will flow stock so don't expect to really ever see this engine in normally aspirated form (if so we are talking roughly 300ish horsepower).

It is possible as seen with a CAD drawing that this engine can have its turbos moved to the outside and more boost added to get it over 550BHP as well as allow hard use of the engine. Other then that this is pretty much it for the 4.2L twin turbo engine.

[Quinten_33]

We actually know heaps about it. It’s a matter of the information not making it to the public and the wrong information being repeated by the press. Some forums are reliable for providing inside information, including CorvetteForum. There’s a plethora of members who are retired GM engineers or other employees, all who provide information on the processes GM utilizes in creating and testing new cars. They have connections to inside sources who work on the mid-engine Corvette. There’s a member who has gone to Laguna Seca multiple times to watch GM test new cars. In fact, he was there last Thursday as Chevy was conducting “future powertrain testing” and he talked to the chief powertrain engineer. There’s friends of GM employees who get information and even images. Those kind of guys have revealed many design aspects of the mid-engine Corvette and even the number of Dual-clutch transmissions they ordered. Two people who worked on the mid-engine Corvette have even shared images and information with the forum, and risked their amazing jobs in the process.

I guarantee you all that there will not be a 4.2L or 5.5L engine in the mid-engine Corvette, and that it won’t be available with a manual. The base model won’t start above $90,000 and it will not be a Cadillac. There’s a thread here where you can continue discussion on the mid-engine Corvette, and I have posted information and sources in that thread: https://www.camaro6.com/forums/showt...391098&page=27

[TrackClub]

The most exciting piece of news for me is the new Caddy 4.2 TT good for 550/627.

If GM follows this architecture as their new strategy and increases displacement and delivers even more power that would be fantastic. And clearly they need to go beyond 650hp and even much higher for a halo car given present ZR1 power levels.

However they get there it will likely be sooner vs later.

[Bhobbs]

They can’t increase the displacement of the 4.2TT. They designed the block to fit 4.2 liters and not much else.

[TrackClub]

Originally Posted by Bhobbs

They can’t increase the displacement of the 4.2TT. They designed the block to fit 4.2 liters and not much else.

I meant increased displacement as in 4.6 or 5.5 or whatever it will end up as a Chev vs Caddy motor

[camaro5]

Originally Posted by TrackClub

Interesting thoughts. No question 5.5L TT will be capabale of big power given 4.2L TT Caddy's new motor.

But if NA 5.5 will have issues getting to 600hp with decent torque and proper reliability then perhaps that rumour is false and thats why reworked LT1 will still be around as a base NA motor? Who knows...

And what would they put in a Z28 given Big Al's comments this car will never have FI motor? NA plus electric? Or maybe Z28 no more?

Fun speculating in any case!

The one and only reason they're using the LT engine at launch is to keep the price down.

They don't want the new increased price too high, which could doom C8.

Then, they'll wack you with the Z06 (NA 5.5L DOHC 32valve), and then the ZR1 (TT 5.5L 32valve with 200hp electric to the front) Some model interchangeability.

There's a thing called history.

Some people know GM, and know how they work, and they know which news sources are reliable by percentile.

Then, a consensus is formed.

Here's the TT5.5L: Will power 7th gen Camaro ZL1 or Z28 with reworked plumbing for front engine use.



https://www.motorauthority.com/news/...-but-no-manual



April 2011 Car and Driver had the C7 pegged

[TrackClub]

Agree: it has always been a set of stepping stones over time - performance wise - for both the Vettes and the Camaros.

But i dont see them sticking an LT1 - even if reworked - in a C8. That motor will end up in a C7 if indeed that model continues along side a C8 and also end up in an SS. I think C8 will debute with a TT right away. Say 4.6L 600hp and 650tq or there abouts. Then a Z06 like variant with TT but higher displacement say 5.4L (following the musings of the member above per his link). Then a top dog version a la ZR1 with electric motors.

It is clear that GM has already spent a bundle on a new power plant TT architecture and we've already seen it in a Caddy. Now they need to ammortize the r+d costs. That will take volume and hence the new C8 Vette and perhaps some Camaro variants. LT1 has already had a nice run and broad applications and it looks like it will continue even longer.

Just my musings thats all as i have no inside sources (except for one which did a prototype of the twin turbo that we see in the Caddy - that work was outsourced to a small shop btw some 2 yrs ago).

[Modern07]

https://www.gmfleetorderguide.com/NA...&page=&butID=1

2019 Camaro order guide - link originally provided by GasmanCTSV on the ZL1 forum.

Any insight on the removal of the UG1 universal home remote welcome as I can’t believe they would not replace that surely?!

[MrChrisLS3]

Originally Posted by Quinten_33

We actually know heaps about it. It’s a matter of the information not making it to the public and the wrong information being repeated by the press. Some forums are reliable for providing inside information, including CorvetteForum. There’s a plethora of members who are retired GM engineers or other employees, all who provide information on the processes GM utilizes in creating and testing new cars. They have connections to inside sources who work on the mid-engine Corvette. There’s a member who has gone to Laguna Seca multiple times to watch GM test new cars. In fact, he was there last Thursday as Chevy was conducting “future powertrain testing” and he talked to the chief powertrain engineer. There’s friends of GM employees who get information and even images. Those kind of guys have revealed many design aspects of the mid-engine Corvette and even the number of Dual-clutch transmissions they ordered. Two people who worked on the mid-engine Corvette have even shared images and information with the forum, and risked their amazing jobs in the process.

I guarantee you all that there will not be a 4.2L or 5.5L engine in the mid-engine Corvette, and that it won’t be available with a manual. The base model won’t start above $90,000 and it will not be a Cadillac. There’s a thread here where you can continue discussion on the mid-engine Corvette, and I have posted information and sources in that thread: https://www.camaro6.com/forums/showt...391098&page=27

There are a lot of smart people over there, (CF Forum) many are friends with some of the folks that work directly with the Corvette, yes. That said, working on the Corvette team, or related powertrain team at GM is a pinnacle position, and with that said, none of those folks are about to try to lose their job by spilling classified info to someone that regularly posts on that Forum, no matter how "buddy, buddy" they might be.

The only thing we "really" know is that GM is driving around some masked cars that "appear" to be a mid engine car, and appears characteristic of a Corvette. Anything else is folks, some very smart, trying to put 2 and 2 together.

[mlee]

Originally Posted by Modern07

https://www.gmfleetorderguide.com/NA...&page=&butID=1

2019 Camaro order guide - link originally provided by GasmanCTSV on the ZL1 forum.

Any insight on the removal of the UG1 universal home remote welcome as I can’t believe they would not replace that surely?!

Available 4th Quarter 2018...

[JhonnyGTR]

Originally Posted by Modern07

https://www.gmfleetorderguide.com/NA...&page=&butID=1

2019 Camaro order guide - link originally provided by GasmanCTSV on the ZL1 forum.

Any insight on the removal of the UG1 universal home remote welcome as I can’t believe they would not replace that surely?!

Stinger Stripe and Spider Stripe.... Mmmmmmm