Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Engine Performance/Intakes/Exhausts

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 01-27-2012, 08:04 PM
Cherokee4X4's Avatar
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Jun 2011
Location: Baton Rouge, Louisiana
Posts: 65
Thanks: 0
Thanked 3 Times in 2 Posts
Rep Power: 1276
Cherokee4X4 is on a distinguished road
Can someone please explain the "tuners" for the JGC

First things first, I know they dont have the tuner out for the 2011 Grand Cherokee yet...my main question is about what I can expect overall with a tuner...

I have never had a V8 before and I was damn sure not passing on the new Hemi...but like most I was not impressed with the performance when I picked up my new ride. I was like "This is a HEMI?" So of course I started investigating to find out how I can get the most out of this beast. Granted I already know about your typical bolt on upgrades and I have done a couple already. But I am definitely getting a tuner once they crack the code...my questions are...

How does the tuner effect gas mileage?
What type of horse power gains can I expect?
Is it hard to install and or operate?
Is this hidden or will I have some ugly module hanging out in my cabin?
Is it easy to program?
Will it get rid of the "lag" I experience when I stomp it?...I really hate this the most and think its because the accelerator is electronic throttle

Any help on what I can expect with a tuner would be much appreciated...like I said this is my first V8 and I want to unleash the beast.

thank you all
__________________

__________________
Reply With Quote
  #2  
Old 01-30-2012, 09:14 AM
Member
 
Join Date: Jan 2012
Location: Chicago Suburb
Posts: 154
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 83647
MikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond reputeMikeBoom has a reputation beyond repute
Re: Can someone please explain the "tuners" for the JGC

Tuners come in a variety of flavors, but the main categories--and these are my terms--are piggyback units and reprogrammers. They're not difficult to install, though it's important to follow the directions closely. Failing to do so can render your vehicle an inert lump of steel.

I've used reprogrammers--specifically Cobb AccessPorts-- on turbocharged vehicles (Subarus and BMWs). In those applications, you can realize huge increases in horsepower and torque. The Stage I program I currently have on my 535xi yields increases of over 30%. But this type of increase comes largely from bumping up boost levels (plus adjusting timing, air/fuel ratios, etc.) and is simply far beyond what you'd see in a vehicle that's not turbocharged or supercharged.

On normally aspirated vehicles, these tuners typically yield much less impressive increases, despite some very inflated claims from their manufacturers. You might eke out 10-20 hp. on a hemi, but I'd question claims much beyond that. Of course, there can be a bit of a cumulative effect from adding a CAI, exhaust, etc. However, it's generally going to be less than what many people on discussion boards claim . . . and it's not simply a matter of adding 10 hp from a tuner + 8 hp from a CAI + 15 from an exhaust and yielding a 33 hp gain; the cumulative power gains are often less than what the individual components would add up to.

Where a tuner can help is with issues of throttle response, like the lag you note. With a drive by wire throttle, the CPU makes certain assumptions as to how the vehicle should respond and sends its decision to the engine. A tuner can alter the response of the CPU, telling it to adjust fuel flow, timing, etc. to achieve greater responsiveness. Also, sometimes the tuners do little more than alter how much throttle is applied over a given range of gas pedal application. This makes the vehicle feel more powerful, but it's simply a matter of applying more throttle with less pressure on the accelerator.

I'm not by any means an expert when it comes to any of this, particularly Jeep products, but I wouldn't expect a huge performance increase with a tuner. You might eliminate enough throttle lag to make the driving experience more pleasurable and you might bump up your horsepower/torque by a few percentage points, but you would need to make more extensive modifications to effect a serious increase in performance.
__________________

__________________
Reply With Quote
  #3  
Old 01-30-2012, 10:48 AM
JeepCoop's Avatar
Senior Member
My Jeep: 2007 5.7L WK
 
Join Date: Oct 2010
Location: Los Angeles, CA
Posts: 6,750
Thanks: 360
Thanked 75 Times in 72 Posts
Rep Power: 1892626
JeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond repute
Re: Can someone please explain the "tuners" for the JGC

This is my how to thread on installing the tune which is AMAZINGLY easy!! For the Hemi I recommend the DiabloSport Tuner. Any of the 3 avail will dramatically change your beast. Also, if you want even more performance and MPG then you can get a custom tune where you send FlyinRyan (member here) your info and live data from your engine. This totally woke up my sleeping monster!! I HIGHLY recommend it!!

How to install
www.jeepgarage.org/showthread.php?t=16764

FlyinRyans tune thread
http://jeepgarage.org/showthread.php?t=34450

Good luck!
__________________
[SIGPIC][/SIGPIC]
|Build Thread

Reply With Quote
  #4  
Old 01-30-2012, 11:02 AM
Member
 
Join Date: Feb 2010
Location: CT
Posts: 966
Thanks: 1
Thanked 6 Times in 5 Posts
Rep Power: 22013
jeepster23 has a reputation beyond reputejeepster23 has a reputation beyond reputejeepster23 has a reputation beyond reputejeepster23 has a reputation beyond reputejeepster23 has a reputation beyond reputejeepster23 has a reputation beyond reputejeepster23 has a reputation beyond reputejeepster23 has a reputation beyond reputejeepster23 has a reputation beyond reputejeepster23 has a reputation beyond reputejeepster23 has a reputation beyond repute
Re: Can someone please explain the "tuners" for the JGC

Quote:
Originally Posted by JeepCoop View Post
This is my how to thread on installing the tune which is AMAZINGLY easy!! For the Hemi I recommend the DiabloSport Tuner. Any of the 3 avail will dramatically change your beast. Also, if you want even more performance and MPG then you can get a custom tune where you send FlyinRyan (member here) your info and live data from your engine. This totally woke up my sleeping monster!! I HIGHLY recommend it!!

How to install
www.jeepgarage.org/showthread.php?t=16764

FlyinRyans tune thread
http://jeepgarage.org/showthread.php?t=34450

Good luck!
OP has a WK2 so as of now there are no tuners available yet as they have not been able to break the ECU code.
__________________
Reply With Quote
  #5  
Old 01-30-2012, 12:04 PM
JeepCoop's Avatar
Senior Member
My Jeep: 2007 5.7L WK
 
Join Date: Oct 2010
Location: Los Angeles, CA
Posts: 6,750
Thanks: 360
Thanked 75 Times in 72 Posts
Rep Power: 1892626
JeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond repute
Ahhhh good to know. Hopefully it'll happen soon. Lol
__________________
[SIGPIC][/SIGPIC]
|Build Thread

Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
The "OFFICIAL" JeepGarage.Org 2012-15 WK2 Jeep SRT "Ordered" thread Scottina06 Grand Cherokee SRT - WK2 148 10-21-2014 01:11 PM
Difference Between "Production" & "Premium" Floor Mats coy886 Grand Cherokee - WK 3 09-08-2011 10:32 PM
Smaller "JGC"-like in the future? Jgauthier Grand Cherokee - WK2 - 10 06-26-2011 12:37 AM
My JGC has been in "Pending Inspection" for 10 days ksojeep Grand Cherokee - WK2 - 6 03-21-2011 10:52 PM
CAUTION - WK "E-Brake"/"Handbrake" issue! Marlin Grand Cherokee - WK 19 11-03-2010 10:26 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:58 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community