Turning off 4cyl mode on the 392?

[Livernois Motorsports]

Saw video on FB. Killer time for a big box! Curious to see how much HP corn will make. I know SP's with the 6.4 and just bolt ons are running 11's. Yes different vehicle but close to 500whp. So will Livernois be working on a CAI and possible exhaust system? Coming off the right side of the block that 90° turn can't be good for airflow.

We have discussed options for intakes, but no matter the option, they all would ditch the offroad capabilities of the stock box, which most have said they are not willing to trade off on. Exhaust, however, maybe be something there.

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[Max3ffort]

How do you tell when it doors in to 4cyl mode when cruising besides the abrupt exhaust note change when it switches back up? The owners manual says it will display on the dash, but I have never seen anything.

 

[Ted392]

How do you tell when it doors in to 4cyl mode when cruising besides the abrupt exhaust note change when it switches back up? The owners manual says it will display on the dash, but I have never seen anything.

Go to the screen with fuel economy and 4cyl will display near center of screen.

 

[2nd 392]

Go to the screen with fuel economy and 4cyl will display near center of screen.

I prefer to leave the loud button on and when it sounds like it’s sh!ttin’ it’s britches it reminds me to tap it into manual shift to disable…..Leaving the fuel economy screen on that’s usually showing 9’s and 10’s doesn’t help enhance enjoyment. 🫣

 

[stumblinhorse]

Last fill up.

 

[DonH63]

Last fill up.

Wow, and in Colorado, that's great! My best so far is around 16 mpg highway, around 6-7 mpg off-road. Still less than 1k miles so hoping it nudges up a hair, but I've a lot of weight in it (winch and tools, not just me ).

 

[stumblinhorse]

Wow, and in Colorado, that's great! My best so far is around 16 mpg highway, around 6-7 mpg off-road. Still less than 1k miles so hoping it nudges up a hair, but I've a lot of weight in it (winch and tools, not just me ).

Yes and I hit the speed limiter 3x on that tank…

 

[DonH63]

Yes and I hit the speed limiter 3x on that tank…

I have not driven fast enough, didn't even know there was a speed limiter.

 

[stumblinhorse]

I have not driven fast enough, didn't even know there was a speed limiter.

Yours is higher than mine 99 vs your’s is 110.

 

[DonH63]

Yours is higher than mine 99 vs your’s is 110.

Good to know if we ever race. Not sure mine will ever see 99 let alone 110, especially with all the traffic these days.

 

[stumblinhorse]

Good to know if we ever race. Not sure mine will ever see 99 let alone 110, especially with all the traffic these days.

Sneaks up fast passing someone…. 99 does at least. Triple digits on my 35s. No thanks.

 

[DonH63]

Yah, pushing a brick with wheels on 35's is not for racers... I drive it slower than our other cars, much to my wife's delight. Though she has hollered when I'm doing the speed limit or thereabouts; it "feels" much faster with the height and noise.

It's been a long time since I had a solid front axle and forgot how much they wander, though it seems fairly minimal, just a lot compared to my Grand Cherokee. I definitely notice the larger tires and lower gearing.

To include something on-topic: I have not really noticed the 4/8 cylinder switch. I have noticed the exhaust sound and smile every time I start it up.

 

[stumblinhorse]

Yah, pushing a brick with wheels on 35's is not for racers... I drive it slower than our other cars, much to my wife's delight. Though she has hollered when I'm doing the speed limit or thereabouts; it "feels" much faster with the height and noise.

It's been a long time since I had a solid front axle and forgot how much they wander, though it seems fairly minimal, just a lot compared to my Grand Cherokee. I definitely notice the larger tires and lower gearing.

To include something on-topic: I have not really noticed the 4/8 cylinder switch. I have noticed the exhaust sound and smile every time I start it up.

Funny it is easy to drive mellow in my JGC summit hemi. Quite a bit different. More relaxing in that.

 

[2nd 392]

Last fill up.

You Braggart you

go ahead, just don’t enjoy it so much

 

[stumblinhorse]

You Braggart you

go ahead, just don’t enjoy it so much

I was showing the 68°. Oh and yes I get almost 20mpg..

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