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  #13  
Old 07-16-2012, 09:25 PM
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Re: How to get HP at the tires?

Part of it is you haven't even gotten through the break in period for the truck. If you give it a few thousand miles it will loosen up some and you should feel some improvement.

Running premium shouldn't have any benefits, except possibly having more cleaners added into it. For negatives, it costs more, won't do you any good, and might freak the ECU out.

The reality is, the WK2 is 5k+ pounds. It's significantly heavier than the WK1, and the weight shows. Not only that, but it's far smoother and quieter, so you don't feel the performance as well. It's certainly no sports car, but it's far from feeling like the v6 on a good day. At least mine is.

Like I said, I'd give it a few thousand miles to loosen up. It's never going to be as quick as an '08, the '08 had the same engine but with a huge amount less weight.
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Old 07-16-2012, 09:32 PM
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Re: How to get HP at the tires?

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Originally Posted by FAUEE View Post
Part of it is you haven't even gotten through the break in period for the truck. If you give it a few thousand miles it will loosen up some and you should feel some improvement.

Running premium shouldn't have any benefits, except possibly having more cleaners added into it. For negatives, it costs more, won't do you any good, and might freak the ECU out.

The reality is, the WK2 is 5k+ pounds. It's significantly heavier than the WK1, and the weight shows. Not only that, but it's far smoother and quieter, so you don't feel the performance as well. It's certainly no sports car, but it's far from feeling like the v6 on a good day. At least mine is.

Like I said, I'd give it a few thousand miles to loosen up. It's never going to be as quick as an '08, the '08 had the same engine but with a huge amount less weight.
So is me giving it alot of throttle at points not a good thing being it is not per say broken in?
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Old 07-16-2012, 11:51 PM
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Re: How to get HP at the tires?

Drive it how you drive it. Just make sure to give it hell every now and then to clean out the carbon buildup from city driving. If all you do is city driving you may also want to disconnect the battery overnight. This will reset the adaptives. Then take it out and drive it like hell.

As for tuning and mods. You can mod the Jeep to high heaven right now, but you will have to go with a stand-alone engine management system as there are no handheld tuners available yet to flash the PCM.

Premium fuel does nothing for a vehicle unless it is tuned for it, go with what the owners manual says. Adding premium fuel to it will not hurt the Jeep, but it will hurt your wallet.
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  #16  
Old 07-17-2012, 06:46 AM
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Re: How to get HP at the tires?

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Originally Posted by ColdCase View Post
I've seen my share of interpreted/manipulated dyno charts.. like statistics, you can present the same results in a number of ways to prove about anything...

Is that gain peak or across the board, immediately after install, a ECU reset or after at least 10 engine hours, 10 ignition cycles. Same temp/humidity, different days? What about torque?

I've read that anything +/- 10% is within margins of error and therefor pretty meaningless. The same engine/setup will run 10hp different from day to day for this type of engine. The data collected for the dyno charts I've seen was collected using flawed procedures, most conveniently leave out important fine print and are probably not worth the paper they are printed on.... except for perhaps marketing.
All good & valid points, but I'm not talking about manufacturer dyno numbers - I only trust independent dynos run under controlled conditions over multiple passes. We're on the same page here.
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Old 07-17-2012, 06:52 AM
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Re: How to get HP at the tires?

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Originally Posted by FAUEE View Post
The reality is, the WK2 is 5k+ pounds. It's significantly heavier than the WK1, and the weight shows.
Makes me wonder if there are any weight-saving techniques to be had on the WK2. I wouldn't strip the interior like I did on some of my previous cars, but lighter wheels and a light-weight battery could save a hundred lbs. Run on a quarter tank of gas and it should be good for a .1 sec improvement in the quarter.
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  #18  
Old 07-17-2012, 07:13 AM
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Re: How to get HP at the tires?

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Originally Posted by montgb View Post
Makes me wonder if there are any weight-saving techniques to be had on the WK2. I wouldn't strip the interior like I did on some of my previous cars, but lighter wheels and a light-weight battery could save a hundred lbs. Run on a quarter tank of gas and it should be good for a .1 sec improvement in the quarter.
Technically any weight reduction could help, but again, it's a 5000 pound SUV. If you're looking for performance, buy an SRT8.

That said, reducing the unsprung mass would be the most benefit. Forged lightweight 18s, lighter tires, multi piece rotors (carbon if you can get them) would all reduce the unsprung mass and add a noticeable amount of performance when combined.

But of course would spend probably $30k to do that, and would be better off just buying an SRT8. Or just buying a WK1 and living with it.

FWIW, I don't find my Overland lacking in performance in any case. I drive fairly conservatively now, and appreciate that the Jeep has a luxurious ride. It's not prone to over-reacting to driver input like most of the German SUVs, and it actually has a decent amount of power and torque unlike the Japanese ones (FX50 being an outlier). It's exactly how a luxury vehicle should drive, it drives like a matured vehicle and not a hot rodded boy racer car. That personality was one of the main reasons I bought the Jeep over its competition, it just drove more luxuriously, and when you do open up its power it isn't a big loud crazy affair, it just passes whoever you want it to pass with ease and poise. If I have any unfulfilled performance desires, I'll buy a Porsche and fulfill those desires. But in the Jeep, I want it to be calm and luxurious.
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Old 07-17-2012, 08:04 AM
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Re: How to get HP at the tires?

Most drivers could loose a little weight.
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Old 07-17-2012, 12:23 PM
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Re: How to get HP at the tires?

My numbers were on a WK1 Srt8. Should have specified. My bad.
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