Turbo6TA

As I see it ... The BIG PROBLEM with this new LT1 engine is that it drops 2 cylinders at cruising speed.

Remember the Cadillac V-8-6-4 engine? Well, it dropped cylinders based on engine load. Probably one of the WORST engines designs to date to come out of GM. Well, it didn't last long at all in the Cadillac, and it won't last long in the Corvette either!
___________________________________

Cadillac V 8-6-4

"First experiments with multiple-cylinder engines during WWII, were re-attempted in 1981 on Cadillac's ill-fated L62 "V8-6-4" engine. The technology was made a standard feature on all Cadillac models except Seville. Cadillac, in conjunction with Eaton Corporation, developed the innovative V-8-6-4 system which used the industry's first engine control unit to switch the engine from 8- to 6- to 4-cylinder operation depending on the amount of power needed. The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. But the system was troublesome, and a rash of unpredictable failures led to the technology being quickly retired."
____________________________________

And to think, GM is taking the plunge again and bringing this idea back in no less than there peformance car icon!

Let me be the 1st to say that this LT1 that drops cylinders at cruise speed is going to be the downfall of the C7 ... and I will also be the 1st to tell you that this technology won't last no more than 2 model years in this new Corvette.

Oh ... and did I say that this engine is going to KILL sales of the C7 ... just watch and see!

Chicago1

Seems to do fine in the camaro don't see a problem excpet the exhaust note when it switches

03 SILVER

Unfortunately, I agree.

Z06Norway

So you dont believe in technology improving with time ?

I hope your wrong and i hope for 7 speed paddleshift dual clutch


Rune

Turbo6TA

Well, it was a disaster for Cadillac, and I promise you it will be a disaster for Corvette.

Racer X

First it drops 4 cylinders.

It is in no way shape or form the same technology as used in the Cadillac.

JoesC5

Similar system has been sucessful in the Chrysler hemi for several years now.

McGirk94LT1

Oh come on. If you're referencing the Cadillac from decades ago, and not any of the numerous cars from the last 5 years from multiple companies, you don't know what you're talking about.

It's been possible since the ls2 in 2005, but they chose not to because it caused harsh harmonics and vibrations because of the corvette specific transmission. Read again, they CHOSE not to because it wasn't ready. Obviously they've figured it out now, at least for the automatics.

This thread out to be locked outright.

Turbo6TA

okie dokie ... But lets just see how this is accepted by the new Corvette buying public.

1BADLS3

AFM sucks!

I have it in my truck and I had it disabled via my tune.

AFM is worthless and causes excessive oil consumption. GM dropped the ball big time with this design. I certainly hope they fixed it for these new engines.

There is a TSB for AFM in the trucks to try to minimize oil consumption. A metal deflector in the engine to prevent oil mist from getting into the combustion chamber. FAIL!

Turbo6TA

Now, why would you make that comment?

Because you don't agree with me?

1BADLS3

My wife's '11 Accord V6 has it. It's a 6-4-3 system and works seamlessly and flawlessly.

GM's system blows...literally.

Black 02

You do know they have been doing this on the trucks since 2007? Probably slightly before that on other models. It drops four cylinders, not two. The biggest issue with the system has been lifter failures on high mileage vehicles.

C6Sixspeed

That was 31 years ago

That's like saying this 8088 sucks.. pc's will never work.

DREAMERAK

Yeah,right, because technnlogy has not advanced in the last 31 years...

Black 02

Did you create this thread on one of these?

Carver Electrics

My neighbors Accord V6 has the same system. The car has been in the shop 15 times. The car even stalled at 65 MPH with less then 1000 miles on it.

Turbo6TA

Ok ... I am all screwed up ...

Lets just set back and see how this is accepted by the Corvette buying public ... shall we

Any guesses

Black 02

My guess is that there will be a lot of threads on here about taking a three hour trip and averaging 30+ mpg while cruising at 75 mph.

Slynky

Don't know...

As I've stated before (and hopefully not overstating it), my borther-in-law sold his top-of-the-line 2012 Camaro after about one year of ownership. The reason was AFM. Didn't like cruising on 4 cyclinders and still getting gas mileage of an 8-cylinder. Didn't like the lag in kicking in all the cylinders. Liked everything else. That was the reason he sold it.

I'm only here because this is supposedly a completely new engine design and will wait and see what people actually say about it next year instead of forming my opinion completely now.