I have had a chance to put 1,000 miles on my 392 and thought I would share some thoughts.
Shortly before I received my 392 they announced the Recon Extreme package, First thought was great there going to put dana 60's in it and now I have to reorder another and let mine go. Then I realized nope they are doing it with the current axles and I thought WTH really. I was like no way they wont break things with a 4.56 and under a hard TQ launch but no where can I find what the axles are really rated for, only 8 percent stronger than a JK44 is really all I could find.
Fast Forward a week or two and my 392 was delivered. This is my first 6.4 hemi in any vehicle and I must say it does not disappoint. TQ is really amazing and always there from the driving experience. Then I came across a Dyno of a 392 Rubi and it's what you would expect after driving it. with a 3.73 and stock 33's it makes more TQ to the wheel at 2000 rpm than the 3.6 or 2.0 at any RPM. Then I began to understand 3.73 gear was enough even with a tire change and probably yields the best MPG, great performance and the Motor would push even 37's very good with this much power on tap.
As for the 4.56 gears I'm interested to see how the 392 responds to them. At the 392 Launch I thought they missed the mark with the 3.73 and Dana 44 ( expected 4.10 like other Rubis and hoped for dana 60) and I did the math on the stresses the axle would see with lower gears, this motor, and wow its a lot of TQ. Way more than earlier generations would take. I originally came to terms that the axles were maxed out with the 3.73 and it would half to do. Worst case aftermarket LOL! But if the 4.56 proves reliable with this set up then I have options if one day I feel the need.
Looking at a gear chart the 4.56 is a pretty big jump with this much power, more than 300 rpm between the two factory set up's so you get the overall ratio with the bigger tire back and then some more. Two big questions I have what will it do to MPG and is it reliable.
Now to the driving experience:
So far this jeep is everything I hoped it would be then some. I was surprised at the quality of the ride even though I heard it mentioned many times in reviews.
When you jump in the skinny peddle I love they way it reacts! it's dramatic! it gets loud! the rear squats! the front jumps up! and it runs hard! Basically I'm pretty sure it breaks a few rules of nature in the process. Yet when cruising it is almost refined, exhaust closed it actually quiet, ride is good and it handles pretty good for a Jeep.
Torque Launch - Yes, that is Just an experience I think you must have in one of these. They leave the line HARD! Oh what fun.... The auto 4 wheel seems to work great, again these just hook and go! Apply brake, add throttle wait for engine and exhaust to change, release the brake and let it run! ( in a controlled environment of course lol)
I have the sky one touch and to be honest I like it. I don't think it is overly noisy. Originally I was on the fence but I would buy it again. Coming home from a trip I was running 79 MPH with the a/c on and it was not bad at all. Some how got 17.0 MPG on that tank. Pretty sure I had a tail wind most of the way either that or it just loved the highway. Otherwise about 15 MPG so far. Side note, windows down top open seem to make for worse MPG but who cares.
I will say the adaptive cruise is almost a little harsh. Roll up on someone and it will slow pretty quick, go around and well that 392 will get you right back to speed pretty quick.
At the end of the day I'm glad they built it and I'm glad I jumped on the opportunity to own one.
Shortly before I received my 392 they announced the Recon Extreme package, First thought was great there going to put dana 60's in it and now I have to reorder another and let mine go. Then I realized nope they are doing it with the current axles and I thought WTH really. I was like no way they wont break things with a 4.56 and under a hard TQ launch but no where can I find what the axles are really rated for, only 8 percent stronger than a JK44 is really all I could find.
Fast Forward a week or two and my 392 was delivered. This is my first 6.4 hemi in any vehicle and I must say it does not disappoint. TQ is really amazing and always there from the driving experience. Then I came across a Dyno of a 392 Rubi and it's what you would expect after driving it. with a 3.73 and stock 33's it makes more TQ to the wheel at 2000 rpm than the 3.6 or 2.0 at any RPM. Then I began to understand 3.73 gear was enough even with a tire change and probably yields the best MPG, great performance and the Motor would push even 37's very good with this much power on tap.
As for the 4.56 gears I'm interested to see how the 392 responds to them. At the 392 Launch I thought they missed the mark with the 3.73 and Dana 44 ( expected 4.10 like other Rubis and hoped for dana 60) and I did the math on the stresses the axle would see with lower gears, this motor, and wow its a lot of TQ. Way more than earlier generations would take. I originally came to terms that the axles were maxed out with the 3.73 and it would half to do. Worst case aftermarket LOL! But if the 4.56 proves reliable with this set up then I have options if one day I feel the need.
Looking at a gear chart the 4.56 is a pretty big jump with this much power, more than 300 rpm between the two factory set up's so you get the overall ratio with the bigger tire back and then some more. Two big questions I have what will it do to MPG and is it reliable.
Now to the driving experience:
So far this jeep is everything I hoped it would be then some. I was surprised at the quality of the ride even though I heard it mentioned many times in reviews.
When you jump in the skinny peddle I love they way it reacts! it's dramatic! it gets loud! the rear squats! the front jumps up! and it runs hard! Basically I'm pretty sure it breaks a few rules of nature in the process. Yet when cruising it is almost refined, exhaust closed it actually quiet, ride is good and it handles pretty good for a Jeep.
Torque Launch - Yes, that is Just an experience I think you must have in one of these. They leave the line HARD! Oh what fun.... The auto 4 wheel seems to work great, again these just hook and go! Apply brake, add throttle wait for engine and exhaust to change, release the brake and let it run! ( in a controlled environment of course lol)
I have the sky one touch and to be honest I like it. I don't think it is overly noisy. Originally I was on the fence but I would buy it again. Coming home from a trip I was running 79 MPH with the a/c on and it was not bad at all. Some how got 17.0 MPG on that tank. Pretty sure I had a tail wind most of the way either that or it just loved the highway. Otherwise about 15 MPG so far. Side note, windows down top open seem to make for worse MPG but who cares.
I will say the adaptive cruise is almost a little harsh. Roll up on someone and it will slow pretty quick, go around and well that 392 will get you right back to speed pretty quick.
At the end of the day I'm glad they built it and I'm glad I jumped on the opportunity to own one.
