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  #25  
Old 01-22-2012, 06:10 PM
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Re: Hemi questions

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Originally Posted by PECo View Post
I think that Jeep doesn't have the fuel economy/performance equation quite right, yet. The thinking behind the Pentastar V6 is sound, but the current engine simply isn't powerful enough. A 5,000+ pound car needs more than 300 HP and 300 lb ft of torque. And closer to 400 for each would be even better. That's why I got the HEMI. But taking a powerful engine and trying to make it economical with a cylinder displacement system isn't as effective as taking an economical engine and making it more powerful with forced induction and direct injection.

That said, though, I like the way that the HEMI performs, because the power is always there. And although I'm not a fan of loud exhaust systems, I don't need Lexus quiet, either. I'm really enjoying my 2012 Overland 4x4 HEMI and would recommend it to anyone who intends to tow loads up hills. I'm still knocking on the real wood trim and crossing my fingers, and I haven't had ANY problems with my Jeep. At all. Really.
Thanks, that's definitely noted.

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Originally Posted by peckmv View Post
Tuner,

If you plan on towing a 4400 lb load, then its a no brainer. You need a V8. Weither it be the hemi or some other product. This is a must if some of that towing involves hills or mountains. I know the V6 has a max of 5000 lbs but as a rule of thumb I would never exceed 80% of max load. Gas mileage is really a secondary thing with the JGC because its a 4X4 and they generally suck for gas mileage due to the drive system. If you don't plan on going off-road then you could consider the 2X4 option. The whole purpose of the MDS was to satisfy the government and thier demand for one size fits all gas mileage requirements. The car manufacturers are trying to please the customer and thier needs and still fill the adverage mpg law that the Fed has imposed.
I'm trying to get the best rounded engine platform. I don't tow much and I drive mostly city and some HWY miles, so I was thinking of getting the V6. I do like the extra power that the V8 has, but now I'm in the middle of balancing the power to mpg. I see quite a few people getting 20+ mpg with with the V6 and have pulled considerable load of 4k-5k lbs with no issues, compared to most V8 owners stating 10-14 mpg in the city and have pulled up to almost 8k lbs. That's like a 6 or more mpg difference, which could be like nearly an extra 150 miles to the tank. I had my mind set on the V8, because it's nice to have the extra towing ability and power on reserve if and when I need it, so I'm doing an extended test drive of the V8 and then I'm going to do a little test drive of the V6. I don't need a race car or a Prius, but I want to try to avoid buyer's remorse with whatever Jeep platform I get. Thanks.
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  #26  
Old 01-23-2012, 12:06 AM
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Re: Hemi questions

I understand where you coming from tuner. Either way you go I'm sure you'll make the best choice for you. Good luck with which either one you choose.
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  #27  
Old 01-23-2012, 10:42 AM
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Re: Hemi questions

My Hemi is very quiet and smooth when idling. My wife had a mini-orgasm when I stomped on it to pass a car and the Hemi roared!
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  #28  
Old 01-23-2012, 02:44 PM
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Re: Hemi questions

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Originally Posted by tuner088 View Post
1. I noticed that the Hemi is a bit loud while idling and definitely under acceleration, is there anyway to tone it down a bit short of changing the exhaust? <snip>

2. Currently I'm getting a little over 12 mp in the city, should I expect more after a few tanks of gas, or should I look forward to seeing that number stay there? <snip>
For the first one, it definitely isn't loud. In fact, it's very muted. I wish you could have heard my 4.0 liter WJ at idle. Now that was loud.

The 12 MPG is pretty much par for the course. I get 13 with 89 Octane. On the freeway I normally get between 18 and 19. On a recent trip where there was a lot of traffic at places (variable speeds between 45 and x5 (not saying the top end)) we got about 23 MPG or 500 miles on a tank of gas. Again, not sure if this helps any, but my 4.0 liter I6 on my 2001 WJ got 13 MPG in the city and 18 - 19 MPG on the highway. So, in some ways I'm getting the same, but in other ways I'm having way more fun with the Hemi than I ever did with the inline-6.
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  #29  
Old 01-23-2012, 06:05 PM
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Re: Hemi questions

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Originally Posted by WK2 Rover View Post
My Hemi is very quiet and smooth when idling. My wife had a mini-orgasm when I stomped on it to pass a car and the Hemi roared!
The Hemi snorts on full throttle like no other stock V8 I've had in any of my previous trucks or SUVs. It doesn't go like my Audi, but it does move 2.5 tons with authority!

While we typically do better, when planning trips we can COUNT ON 20mpg for budgeting our fuel needs and refill points with room to spare. (Limited 4x4, Hemi)
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Old 01-23-2012, 06:44 PM
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Re: Hemi questions

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Originally Posted by WK2 Rover View Post
My Hemi is very quiet and smooth when idling. My wife had a mini-orgasm when I stomped on it to pass a car and the Hemi roared!
I can say it does roar very nicely, and I can admit I love giving it gas even while idling. I think I'm more use to the "quiet" power, the one that you have a really quiet car that you can be right next to and not even know it's running, but when you mash the gas it gives out an intimidating roar.

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Originally Posted by nathantw View Post
For the first one, it definitely isn't loud. In fact, it's very muted. I wish you could have heard my 4.0 liter WJ at idle. Now that was loud.

The 12 MPG is pretty much par for the course. I get 13 with 89 Octane. On the freeway I normally get between 18 and 19. On a recent trip where there was a lot of traffic at places (variable speeds between 45 and x5 (not saying the top end)) we got about 23 MPG or 500 miles on a tank of gas. Again, not sure if this helps any, but my 4.0 liter I6 on my 2001 WJ got 13 MPG in the city and 18 - 19 MPG on the highway. So, in some ways I'm getting the same, but in other ways I'm having way more fun with the Hemi than I ever did with the inline-6.
Lol. I don't know, I guess I'm just not use to V8 Hemi engines. I'm trying to give it a try though. I didn't even thing about the V6 with I originally wanted the Jeep, so maybe it's something I have to get use to. With the MDS I felt that it would be a bit more over the sticker if you can keep it in ECO mode, whether your on the highway or not. I can cruise in the city with no stop and go traffic and keep ECO on 95% of the time and the MPG won't budge.

Quote:
Originally Posted by BManz View Post
The Hemi snorts on full throttle like no other stock V8 I've had in any of my previous trucks or SUVs. It doesn't go like my Audi, but it does move 2.5 tons with authority!

While we typically do better, when planning trips we can COUNT ON 20mpg for budgeting our fuel needs and refill points with room to spare. (Limited 4x4, Hemi)
I hit 20 on the highway last week during an hour trip, and didn't see much over that. I had on the ACC the whole time and I don't really see anything over the sticker right now. With that and what others that have disabled it in the WKs say about the mpg, makes me think if the MDS works at all.




Everyone that is actually answering the questions and adding input is being really helpful though. Thanks so far guys.
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  #31  
Old 01-23-2012, 07:30 PM
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Re: Hemi questions

I guess you could always add another muffler to it.

You should hear mine it knocks stuff off the walls when I start it.
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  #32  
Old 01-24-2012, 07:55 PM
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Re: Hemi questions

In response to your question about gas mpg: it's a V8 4x4 (or AWD or whatever you want to call it0
In response to your question about idle noise: It's a V8

If I wanted good mpg, quite idle, my last choice would be to get an V8 4x4 SUV, I'd be looking at some sort of Toyota Camry Hybrid or something

OP sounds like a troll poster to be honest. "hey guys my V8 doesn't have a V6's mpg and makes a lot of noise for a 5.7L engine"

And yes, I have a Subaru STI also which makes a lot of noise and sucks the gas also, I don't go on Subaru forums asking why my car is loud or doesn't get Honda civic mpg.
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  #33  
Old 01-25-2012, 02:20 AM
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Re: Hemi questions

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Originally Posted by rith View Post
In response to your question about gas mpg: it's a V8 4x4 (or AWD or whatever you want to call it0
In response to your question about idle noise: It's a V8

If I wanted good mpg, quite idle, my last choice would be to get an V8 4x4 SUV, I'd be looking at some sort of Toyota Camry Hybrid or something

OP sounds like a troll poster to be honest. "hey guys my V8 doesn't have a V6's mpg and makes a lot of noise for a 5.7L engine"

And yes, I have a Subaru STI also which makes a lot of noise and sucks the gas also, I don't go on Subaru forums asking why my car is loud or doesn't get Honda civic mpg.
Great another idiot that can't read. 1st off, it's not "my" car and I don't see how your post was anywhere near contributing anything on this topic. How about you take your hand out of your ass so you can concentrate on reading a bit better. Speaking of trolls, you seem more like a troll then me, making useless comments on a post that has nothing to do with you. Let me guess, it's because you're a little loser with nothing else better to do with your time? If you don't have anything positive to say, keep it moving and mind your business..
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  #34  
Old 01-25-2012, 03:17 AM
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Re: Hemi questions

bottom line, you are a current and former high end import owner(thanks for supporting youre countrys economy) compairing those to a jeep is pretty much apples to oranges most merc and lex owners do not expect nor do they want to hear the engine. And in most cases those engines way more advanced engineering wise. We are still using some tech thats been around since the 40s and 50s. As far as mileage goes you will likely find better numbers with ford or gm or of course with another import. Hope you find something that suits youre needs, good luck
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  #35  
Old 01-25-2012, 11:13 PM
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Re: Hemi questions

Get the V8 for towing. It does sound like a Diesel, I assume it is because of the aluminum transmits internal engine sounds differently than the older iron blocks. GM's LS7 "ticks" too, people say it's the injectors. It's normal nowadays to hear it. I'm getting used to it.

As for the forced induction issue, I am not too excited about it. Too many parts for a couple extra MPG's. Reports of electrical issues with the fuel pumps worried me on the BMW. They are high pressure and needed for DI engines. I know it makes sense and is the latest.. I also cannot accept that the X5 turbo 6 is as quick as the 5.7 wk2. I tested the BMW. Nice car, but now that I'm done breaking in my jeep, it seems much quicker. Terrible mileage, but I have no regrets.
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  #36  
Old 01-26-2012, 02:00 PM
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Re: Hemi questions

I just purchased a 2012 Overland with the Hemi. I've had it 2 weeks and put 150 mles on it so far...my take!
This has to be one of the quietest running cars I've ever owned. At idle it's quieter then my 2008 BMW 335xi, and most definaltely quieter then my 2007 Roush mustang.
Upon stomping on the gas, it is on par with the BMW but with a nicer smoother v8 rumble. The BMW sounds good also, but it is a different sound, little louder then the Hemi. The mustang forget it, between the supercharger and the straight pipes with resonators there is no comparison.( Coolest sound ever.......)
I was wondering myself about the gas mileage, right now for 150 miles I'm getting about 9.5 around town. I'm hoping for better after it breaks in a bit and I drive it more.
You have to decide what you want. I don't mind about the gas mileage as my mustang gets about 10 - 11 around town and about 17 on a long highway drive, so I'm used to poor milaeage, plus I need to use 93 in it..I'm used to paying a lot to fill it up, it's well worth every drop of gas spent driving it.
I picked the Hemi, because it's a HEMI. I love my v8's and am willing to sacrifice the mpg and the little noise if any there is to enjoy it.
That being said, think about what you want and what will you use it for; how much you feel it will cost you in the long run for gas, and how much you are willing to put up with the noise level that you percieve.
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