What was GM thinking putting AFM on the LT2 motor. It is the most ridiculous feature on this Vette. If I cared about gas mileage that much I wouldn’t have purchased a $100K V-8.

I know some of you may say “I can’t tell the difference”. Well, I have spoken with a lot of C8 owners and I feel very comfortable speaking for them by saying, we can. Whenever I take it out, I put it either in track or manual mode so it stays on 8 cylinders, but bottom line is you shouldn’t have to do that on this type on car.
For the ones who like AFM because it gets better gas mileage, no offense, but you should not have purchased a V-8.

I love the C8, but hate this feature. When GM decided to put that on the LT2 engine, there must have been a tree hugger in the room.

 

nit picking just use the gas pedal all fixed

 

Got it! Your one of those.

 

Cafe

 

Yes, tree huger in the room was the EPA

 

GM had to do it to meet mileage reguirements outlined by the federal government. If they didn't, the car might have a much smaller V8 or OMG a V6. IMHO I disagree with your assessment that the AFM sucks. I completed a 700 mile trip this past weekend and not once did I feel the car shift from V8 to V4 and back again. Unless I happen to be looking at the gauge cluster, when it happened. You don't feel the change and you certainly don't hear it. Of course, you are driving in the correct mode to eliminate the feature.

 

I would much prefer the LT2 engine didn't have AFM! I wish Range could disable it on C8's.

 

Again,Got it! Your preference. As you watch the reponses come in, you will see I'm am not alone on this.

 

The last three cars I've owned all had it and two of the three were (are) 12 cylinder engines. It's harder now for me to understand the argument. When I'm driving on the highway (let's say 70mph) and I stab the throttle, the car instantly switches from a 6 cylinder back to a V12. There is no noticeable or discernible lag or hesitation. I now consider it an advantageous feature to get closer to 6 cylinder gas mileage on a long trip but if I want to show off at 70 mph for a moment I can do it with full available HP and no loss I can tell.

 

Evidently, you don't know what constraints GM were under...

 

Actually , I do... The Tree Hugger Constraint. (EPA)

 

sigh it is also clear your one of those...... have a nice day

 

[QUOTE=joecbrzx;1607067769]What was GM thinking putting AFM on the LT2 motor. It is the most ridiculous feature on this Vette. If I cared about gas mileage that much I wouldn’t have purchased a $100K V-8.

I know some of you may say “I can’t tell the difference”. Well, I have spoken with a lot of C8 owners and I feel very comfortable speaking for them by saying, we can. Whenever I take it out, I put it either in track or manual mode so it stays on 8 cylinders, but bottom line is you shouldn’t have to do that on this type on car.
For the ones who like AFM because it gets better gas mileage, no offense, but you should not have purchased a V-8.
I love to C8, but hate this feature. When GM decided to put that on the LT2 engine, there must have been a tree hugger in the room.[/QUOT

No tree huger involved.

It was done to help with the fleet mileage so you didn't have to pay a gas guzzler tax.

 

It's called Corporate Average Fuel Economy, and the alternative would have been automatic Stop / Start, which would have been even worse. AFM is barely noticeable in normal use, and any time you push down on the loud pedal the car instantly switches to V8.

It doesn't matter whether YOU or I care about gas mileage. The government cares about gas mileage, and the fines for not meeting CAFE are huge.

 

CAFE follows the National Environmental Policy Act. However, you are correct Start/Stop would be worse.

 

Not sure that I understand your complaint ... you can have it either way right now. If you don't like AFM, just put your car into track or manual mode ...
Happy here with manual mode ... AFM for those who want the fuel economy / mileage.

 

I love the LT2 ..please don’t be derogatory to those of us who marvel at this 495 hp 470 hp motor featured in the c8 stingray.

if you don’t like it that’s your opinion and I can respect that mindset yet please be respectful of the 120 thousand of us who are very impressed with the lt2 stingray performance.

if you don’t like the government mandating fuel economy then please by all means get out and vote for politicians that wil minimize that requirement.

Given the current government requirements I think we are lucky to have 495 hp and 470hp c8 stingray.

im sure if there is enough demand someone in the aftermarket will offer a way to keep the v4 mode out of operating. Maybe it’s the way your driving that your car continually is in the v4 mode.

After 27k miles in the c8 I’m just not noticing the v4 mode. Maybe it’s the way I drive the car. Maybe it’s the z mode Im driving in most of the time? When I’m cruising in tour mode nursing a hang over (kidding) Im not giving two crapolas about v4 mode versus v8 mode as long as the vehicle has the power in an instant when I put my foot down on the go pedal. There’s no lag so who cares.

the quiet exhaust of the NPP gets my node of what’s to quiet but again the aftermarket does seem to offer a solution to my opinion. My buddies borla attak aftermarket system seems just about right. We all have opinions and different perspectives to consider. Many corvette guys are ok with the quiet cabin. I would never suggest that they are “one of those” that’s their respected opinion and I’m ok with that…that’s what makes the world go round.

just soemth8ng to consider

good luck

 

It's actually very simple if you could access the E99 ECU. It's a simple toggle switch in the tune file. At least it was in the E38 and E67.

 

So what is it about AFM that sucks? Just the idea of it? Probably the dumbest thing GM did was put an icon on the dash letting the driver know it's active, otherwise the driver would never know. There are no practical downsides of this technology to the operator, only positive fuel range. Corvette has always been a showcase of tech and engineering and this generation car is amazing, incredibly quick, fast as hell, compliant ride with class leading handling, and is very mind boggling practical and beautiful at the same time. Bitching about AFM that works so well is illogical. Like it or not, efficiency with stellar performance just means good engineering and good execution. Job well done by GM, they should be very proud. You had a choice to buy it or not, and I'm sure you've known about it having AFM, Why did you buy it???? That's the ridiculous part. If you're such a staunch R and hate any fuel saving measures, at next fill up squeeze some gas into the garbage can, that'll really show them tree huggers.

 

I don't love it. I understand why we have it and it is no big problem. Seems kind of childish to hate it so.