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Search: Posts Made By: Doc_d
Forum: Trouble Shooting/Problems/Service 11-23-2012, 01:53 PM
Replies: 32
Views: 1,481
Posted By Doc_d
Re: Fuel usage

In the warmer months I was getting 18 - 19 mpg with my hemi. Now I'm getting 16.5 - 17 mpg in the colder temps / winter blend fuels. My driving is 50/50 city/highway.

My old 3.7 liter v6 liberty...
Forum: Engine Performance/Intakes/Exhausts 11-21-2012, 11:15 PM
Replies: 25
Views: 4,018
Posted By Doc_d
Re: Jeep Hemi vs RAM Hemi

The intake manifold is the difference. The runner length is variable based on RPM.
Forum: Grand Cherokee - WK2 - 11-14-2012, 02:31 PM
Replies: 7
Views: 635
Posted By Doc_d
Re: A little advice

That's a tough question. My big concern is that I've known a lot of guys who had diesel trucks and switched back to gas because of all the issues they had. I suspect here in the U.S. they sell 250...
Forum: Trouble Shooting/Problems/Service 11-14-2012, 10:51 AM
Replies: 9
Views: 1,439
Posted By Doc_d
Re: 2011 Cherokee TPMS wont reset

There are many different wheel and tire combos. It's always best to check the placard on the inside of the drivers door for the correct infation pressure. But yes 28 PSI is too low.

Also keep in...
Forum: Trouble Shooting/Problems/Service 11-08-2012, 11:24 AM
Replies: 25
Views: 1,756
Posted By Doc_d
Re: Gas mileage decrease when....

I agree. The lower energy content is the winter blend fuel can only account for a 2% reduction in fuel economy. As you, WK2007 and others have stayed other factors account for the rest.
Forum: Trouble Shooting/Problems/Service 11-08-2012, 07:26 AM
Replies: 25
Views: 1,756
Posted By Doc_d
Re: Gas mileage decrease when....

I believe you are thinking about this incorrectly. In colder higher density air an engine can make more power but it won't be more fuel efficient.

Let's say we have two identical small single...
Forum: Trouble Shooting/Problems/Service 11-07-2012, 08:48 PM
Replies: 25
Views: 1,756
Posted By Doc_d
Re: Gas mileage decrease when....

Except for the fact that winter blend fuels typically contain more butane to make them more volatile in the colder temps and higher atmospheric pressures. This results in a fuel that has less BTU...
Forum: Trouble Shooting/Problems/Service 11-07-2012, 01:48 PM
Replies: 25
Views: 1,756
Posted By Doc_d
Re: Gas mileage decrease when....

It's the winter blend fuels and Chryslers tuning. Every Chrysler vehicle I've ever owned got much worse mileage in the winter. My hemi was averaging 18 - 19 mpg all summer and now I'm down to 16.5...
Forum: Engine Performance/Intakes/Exhausts 11-02-2012, 12:26 PM
Replies: 20
Views: 1,067
Posted By Doc_d
Re: What to add next????

I'd be pretty amazed if you could get 600 HP to the wheels (about 720 at the crank) from heads, cam and long tube headers. I think you'd be lucky to get 425 to the wheels (about 510 at the crank).
...
Forum: Engine Performance/Intakes/Exhausts 10-30-2012, 01:08 PM
Replies: 512
Views: 71,258
Posted By Doc_d
Re: Any new Updates heard for a WK2 Programmer - BullyDog, HyperTech, SuperChip

The point is simply to make it invisible to the dealer and then there are no problems. My Superchips tuner for my JK is undetectable as long as I flash back to stock before bringing it in. I would...
Forum: Engine Performance/Intakes/Exhausts 10-30-2012, 12:34 PM
Replies: 512
Views: 71,258
Posted By Doc_d
Re: Any new Updates heard for a WK2 Programmer - BullyDog, HyperTech, SuperChip

You can know your rights all you want. I've seen tons of cases where a manufacturer will refuse warranty service due to an aftermarket part that would have not caused the problem. The problem is,...
Forum: Grand Cherokee - WK2 - 10-30-2012, 12:04 PM
Replies: 21
Views: 2,049
Posted By Doc_d
Re: What all do I need to add factory hitch?

I purchased the hitch and wiring from chrysler for a liberty. It was cake to install. Chrysler did a great job designing it. So if labor is expensive consider throwing it on yourself.
Forum: Engine Performance/Intakes/Exhausts 10-30-2012, 11:57 AM
Replies: 146
Views: 12,326
Posted By Doc_d
Re: 2011+ tuning via Diablo is COMING!

On my Superchips programmer for my JK I can set the TPMS thresholds to whatever I want. You would just set it to 0 psi if you really wanted it disabled. Although I have no clue why you'd want to...
Forum: Grand Cherokee - WK2 - 10-30-2012, 08:37 AM
Replies: 34
Views: 1,767
Posted By Doc_d
Re: Not to start a flame war, but I have a V6 Charger as a Rental...

I'd just like to reiterate again that people keep quoting that 8.2 second 0 -60 time for the wk2 hemi and its an anomaly. That is by far the slowest time I've seen.

Most other reviews I've seen...
Forum: Grand Cherokee - WK2 - 10-29-2012, 06:17 AM
Replies: 34
Views: 1,767
Posted By Doc_d
Re: Not to start a flame war, but I have a V6 Charger as a Rental...

We all know the pentastar is a boat anchor but I'm surprised the eight speed wasn't impressive. I've heard nothing but great things about it from the people who have driven it.
Forum: Suspension/Driveline/Brakes/Wheels/Tires 10-29-2012, 06:10 AM
Replies: 15
Views: 1,446
Posted By Doc_d
Re: Winter/Summer Tire Pressure

+1

I'm amazed at how many suckers there are in the world. Paying to have nitrogen put in your tires LOL!

It reminds me of the guys who went around getting signatures for a petition to ban...
Forum: Grand Cherokee - WK2 - 10-27-2012, 11:59 AM
Replies: 41
Views: 2,534
Posted By Doc_d
Re: What oil do you use?

This is one of the big reasons I do my own oil changes. If a dealer would lie I don't put it past the quickly places to mix some old oil in with the new to reduce their costs.

Also I know at...
Forum: Grand Cherokee - WK2 - 10-26-2012, 02:18 PM
Replies: 41
Views: 2,534
Posted By Doc_d
Re: What oil do you use?

Pennzoil Ultra and a Wix oil filter. I did 3000 mile oil change intervals for the first couple. I'll probably push those out to 5,000 miles now.

I also get my oil at Wally World. They have the...
Forum: Engine Performance/Intakes/Exhausts 10-26-2012, 01:27 PM
Replies: 146
Views: 12,326
Posted By Doc_d
Re: 2011+ tuning via Diablo is COMING!

Fueling, ignition timing, thottle sensitivity, transmission shift schedules, etc are kept in tables. I'm guessing there are multiple copies of these tabes for the various select-terrain modes (and...
Forum: Engine Performance/Intakes/Exhausts 10-25-2012, 02:09 PM
Replies: 146
Views: 12,326
Posted By Doc_d
Re: 2011+ tuning via Diablo is COMING!

Just out of curiosity does any have the numbers handy for what kind of increases they were able to achieve on previous hemis?
Forum: Engine Performance/Intakes/Exhausts 10-25-2012, 01:46 PM
Replies: 19
Views: 1,901
Posted By Doc_d
Re: I HATE having to write this thread...

That Edmunds 0 - 60 test was from 2011 I believe. I see V6 owners quoting it all the time. I'm not sure how or why Edmunds ran that slow in the Hemi because most other sources quote numbers closer...
Forum: Grand Cherokee - WK2 - 10-25-2012, 01:00 PM
Replies: 188
Views: 8,781
Posted By Doc_d
Re: Who has driven both V6 & V8 WK2's

I think you need to re-read my post more carefully. It says it was 1400 miles of highway, back country roads and forest logging roads.

I'd say it was about 800 miles of highway, 350 miles of...
Forum: Grand Cherokee - WK2 - 10-24-2012, 12:11 PM
Replies: 188
Views: 8,781
Posted By Doc_d
Re: Who has driven both V6 & V8 WK2's

I did a trip to the U.P. of Michigan last week. 1,400 miles of highway, back country and a lot of slow and rough logging roads. I averaged 21.4 MPG in my Laredo X hemi. Besides the smooth power...
Forum: Grand Cherokee - WK2 - 10-23-2012, 10:54 AM
Replies: 21
Views: 986
Posted By Doc_d
Re: Help me please

This guy sound suspiciously like Ricflair that had the other thread about how the WK and X5 were superior to the WK2. Either way it sounds like more trolling.
Forum: Grand Cherokee - WK2 - 10-22-2012, 07:27 PM
Replies: 16
Views: 1,945
Posted By Doc_d
Re: Who's the $@& hole?

Price fixing is rampant. I'm not sure why it's tolerated as it's my understanding it's illegal in the first place.

As a private pilot I was looking for an expensive Garmin GPS for flying. I...
Forum: Grand Cherokee - WK2 - 10-20-2012, 10:20 PM
Replies: 24
Views: 2,879
Posted By Doc_d
Re: My WK2 just rolled over 20k miles...my thoughts

I just got back from a 1,400 mile trip to the U.P. of Michigan. It was highway, country roads and some really slow forest logging roads. I averaged 21.4 mpg with my hemi. I'm ecstatic about the...
Forum: Grand Cherokee - WK2 - 10-20-2012, 10:08 PM
Replies: 61
Views: 3,986
Posted By Doc_d
Re: WK2 Test Drive

I'll say it again... I owned a 4.7 liter GC and it was junk in comparison to the wk2.

Both the wk and wk2 suck equally when it comes to serious off roading. But the wk2 is superior in every...
Forum: Grand Cherokee - WK2 - 10-19-2012, 10:58 PM
Replies: 61
Views: 3,986
Posted By Doc_d
Re: WK2 Test Drive

The only thing I don't understand about the original poster is his hard-on for the 4.7 liter. I owned a GC with the 4.7. It was a piece of crap compared to the hemi.

Other than that his...
Forum: Engine Performance/Intakes/Exhausts 10-19-2012, 10:29 PM
Replies: 19
Views: 1,901
Posted By Doc_d
Re: I HATE having to write this thread...

I know you don't want to hear it but there is no magic. Even if the ECU / PCM had been cracked you'd be looking at forced induction which is expensive and finicky. It would be cheaper and easier to...
Forum: Engine Performance/Intakes/Exhausts 10-18-2012, 10:24 AM
Replies: 6
Views: 1,481
Posted By Doc_d
Re: 3.6L Pentastar Ported Intake Manifold

$430,7 hours of wrenching and a voided powertrain warranty on a motor known to burn valves.

I'm confused by all the work and money people are investing in the v6 to get 5 more peak horsepower when...
Forum: Grand Cherokee - WK2 - 10-16-2012, 11:33 PM
Replies: 12
Poll: Engine tick
Views: 1,045
Posted By Doc_d
Re: Engine tick

I have a hemi so the only problem I have is with it sounding awesome. I took it to the dealer and they said it's normal. :lol:
Forum: Grand Cherokee - WK2 - 10-12-2012, 10:01 AM
Replies: 28
Views: 1,762
Posted By Doc_d
Re: Are you unhappy with your engine choice?

Without also having choices for "I have the v6 and am happy with it" and "I have the hemi and am happy with it" you'll have a hard time getting any meaningful results from this poll
Forum: Trouble Shooting/Problems/Service 10-10-2012, 01:44 PM
Replies: 30
Views: 2,395
Posted By Doc_d
Re: I messed up

For what it's worth I think Chrysler made a huge mistake not having the vehicle shutdown after the keys are out of the vehicle for 15 minutes.
Forum: Grand Cherokee - WK2 - 10-10-2012, 12:23 PM
Replies: 188
Views: 8,781
Posted By Doc_d
Re: Who has driven both V6 & V8 WK2's

My hemi gets 18 - 19 mpg in mixed 50/50 city and highway. Most of my trips are long ( over 10 miles). I work early so traffic is pretty light.

My worst tank was 16.6 mpg (many short trips) and...
Forum: Grand Cherokee - WK2 - 10-09-2012, 01:50 PM
Replies: 35
Views: 1,929
Posted By Doc_d
Forum: Grand Cherokee - WK2 - 10-09-2012, 09:57 AM
Replies: 14
Views: 4,343
Posted By Doc_d
Re: undercoating your jeep

Undercoating, windshield treatments, are all just expensive snake oil. The dealers are just trying to maximize their profits while you are in a spending mood.

I believe 60 minutes or some show...
Forum: Grand Cherokee - WK2 - 10-09-2012, 09:48 AM
Replies: 188
Views: 8,781
Posted By Doc_d
Re: Who has driven both V6 & V8 WK2's

The biggest reason you couldn't pay me to buy a v6 right now is the head issue. Personally I think the pentastars are all ticking time bombs. The lucky ones are the ones that are having the issue...
Forum: Grand Cherokee - WK2 - 10-08-2012, 06:38 AM
Replies: 188
Views: 8,781
Posted By Doc_d
Re: Who has driven both V6 & V8 WK2's

I think you need to take the overland into the shop. I don't think I could get my hemi down to 11 mpg if I tried and it has significantly more power than the v6 (my mother has the 3.6).

I...
Forum: Suspension/Driveline/Brakes/Wheels/Tires 10-05-2012, 02:03 PM
Replies: 6
Views: 635
Posted By Doc_d
Re: Tire Question

I set mine to 34 psi according to the evic. I have 3 tire pressure gauges and there is like 10 psi variance between the 3. Cheap chinese garbage. So it's hard to trust any of them.

At 34 psi...
Forum: Trouble Shooting/Problems/Service 10-05-2012, 01:49 PM
Replies: 26
Views: 2,886
Posted By Doc_d
Re: No bus

In older cars every sensor, every light, every switch had their own circuit. In new cars their is a network. Things like sensors and switches can be added very easily as an addressable device...
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