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 07-10-2012, 07:17 PM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 48,846
Thanks: 833
Thanked 823 Times in 634 Posts
Rep Power: 7717427
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Ready for some tuning? Look here!

http://jeepgarage.org/showthread.php?t=44040
__________________

__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED Edition" 1 of 1
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2013 JKU 10th anniversary-white
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #2  
Old 07-10-2012, 07:55 PM
armoredsaint's Avatar
Premium Member
My Jeep: 2012 5.7L WK2
 
Join Date: Nov 2011
Location: Ohio
Posts: 1,288
Thanks: 12
Thanked 11 Times in 11 Posts
Rep Power: 234403
armoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond repute
Re: Ready for some tuning? Look here!

i'm confused, is that for the SRT8 only?

cliff notes?
__________________

__________________
2012 Jeep Grand Cherokee Overland 4X4 - Hemi V-8
Mineral Grey with Saddle interior / Quadra Lift / ACC / BSW / FCW / Pano-roof /
aFe Pro-Dry S Filter / Borla Cat-Back Exhaust
Reply With Quote
  #3  
Old 07-10-2012, 08:03 PM
JTS97Z28's Avatar
Premium Member
My Jeep: 2012 3.6L WK2
 
Join Date: Jan 2011
Location: Plainfield, IL
Posts: 1,449
Thanks: 0
Thanked 29 Times in 19 Posts
Rep Power: 25122
JTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond repute
Send a message via AIM to JTS97Z28
Re: Ready for some tuning? Look here!

Here is what I am interested in. Since I have the little V6 I have no interest in making it faster, or super hard shifts, or to remove traction control or anything like that. What I want to know is if he can modify the shift points so this Overland of mine drives like a normal f'ing car lol. I love my 2012 Overland, but cannot stand when it shifts into 2nd and is trying to accelerate at 1100rpm with cars behind me. Whoever came up with the shifting programs on this Jeep certainly doesn't have to drive one everyday. Not only is it annoying, but it takes away any possibility of it being an enjoyable "drivers" car.

So I wonder if this guy can tweak the V6 ECU to shift at much better points and I guess make any other drivability improvements while he's at it. Added fuel economy would always be greatly appreciated.
If so I would be VERY interested.

James
__________________
Reply With Quote
  #4  
Old 07-10-2012, 08:33 PM
Member
My Jeep: 2014 5.7L WK2
 
Join Date: Aug 2011
Location: Houston
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1243
uofh2005 has a reputation beyond reputeuofh2005 has a reputation beyond reputeuofh2005 has a reputation beyond reputeuofh2005 has a reputation beyond reputeuofh2005 has a reputation beyond reputeuofh2005 has a reputation beyond reputeuofh2005 has a reputation beyond repute
Re: Ready for some tuning? Look here!

Quote:
Originally Posted by armoredsaint View Post
i'm confused, is that for the SRT8 only?

cliff notes?
bottom of page 5 says can do for the v6 and the 5.7 v8 engine.
__________________
Reply With Quote
  #5  
Old 07-10-2012, 09:32 PM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 48,846
Thanks: 833
Thanked 823 Times in 634 Posts
Rep Power: 7717427
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Ready for some tuning? Look here!

sorry...page 5
__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED Edition" 1 of 1
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2013 JKU 10th anniversary-white
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #6  
Old 07-10-2012, 10:51 PM
2011hemigc4me's Avatar
Premium Member
My Jeep: 2014 5.7L WK2
 
Join Date: Feb 2011
Location: North Dirty Jersey
Posts: 138
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 1400
2011hemigc4me is on a distinguished road
Garage
Re: Ready for some tuning? Look here!

How much? How much down time if you don't have a core ecu so swap?
__________________
Reply With Quote
  #7  
Old 07-10-2012, 10:52 PM
padgett's Avatar
Premium Member
 
Join Date: Feb 2012
Location: Orlando
Posts: 1,497
Thanks: 0
Thanked 20 Times in 17 Posts
Rep Power: 80064
padgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond repute
Re: Ready for some tuning? Look here!

Not sure what the problem is. My V6 has no problem leaving traffic at a stoplight. Must admit that most of the time I "drive gentle" which may be why I average over 20 mpg in mixed driving though have no trouble merging on the Interstate. Still several people have commented that it is a lot faster than they expected. Maybe I just got a good one.

Only thing I plan to change is to get it to run about 15F cooler.
__________________
Web home. Notary Sojac Y'all
One of these is a diesel:
Reply With Quote
  #8  
Old 07-10-2012, 11:36 PM
jgc4ever's Avatar
Senior Member
My Jeep: 2012 5.7L WK2
 
Join Date: Mar 2011
Posts: 3,178
Thanks: 0
Thanked 76 Times in 67 Posts
Rep Power: 1160190
jgc4ever has a reputation beyond reputejgc4ever has a reputation beyond reputejgc4ever has a reputation beyond reputejgc4ever has a reputation beyond reputejgc4ever has a reputation beyond reputejgc4ever has a reputation beyond reputejgc4ever has a reputation beyond reputejgc4ever has a reputation beyond reputejgc4ever has a reputation beyond reputejgc4ever has a reputation beyond reputejgc4ever has a reputation beyond repute
Garage
Re: Ready for some tuning? Look here!

The engines are designed to run at high temps. Reducing the temp could be a mistake.
__________________
Reply With Quote
  #9  
Old 07-11-2012, 06:05 AM
JTS97Z28's Avatar
Premium Member
My Jeep: 2012 3.6L WK2
 
Join Date: Jan 2011
Location: Plainfield, IL
Posts: 1,449
Thanks: 0
Thanked 29 Times in 19 Posts
Rep Power: 25122
JTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond reputeJTS97Z28 has a reputation beyond repute
Send a message via AIM to JTS97Z28
Exclamation Re: Ready for some tuning? Look here!

Quote:
Originally Posted by padgett View Post
Not sure what the problem is. My V6 has no problem leaving traffic at a stoplight. Must admit that most of the time I "drive gentle" which may be why I average over 20 mpg in mixed driving though have no trouble merging on the Interstate. Still several people have commented that it is a lot faster than they expected. Maybe I just got a good one.

Only thing I plan to change is to get it to run about 15F cooler.
Well maybe the way I explained it came off harsh. My Jeep drives perfectly fine, its just that I personally am not happy with the shift points. Why they would design this thing to shift so early just ruins the driving experience for me. And besides I don't see how bogging the engine can help improve economy. So I wasn't saying my Jeep had a lack of power because it doesnt, it goes just fine if I make it, but during economy minded driving it simply has annoyingly bad shift points.
__________________
Reply With Quote
  #10  
Old 07-11-2012, 07:06 AM
armoredsaint's Avatar
Premium Member
My Jeep: 2012 5.7L WK2
 
Join Date: Nov 2011
Location: Ohio
Posts: 1,288
Thanks: 12
Thanked 11 Times in 11 Posts
Rep Power: 234403
armoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond reputearmoredsaint has a reputation beyond repute
Re: Ready for some tuning? Look here!

Quote:
Originally Posted by jgc4ever View Post
The engines are designed to run at high temps. Reducing the temp could be a mistake.
Tell me more?
__________________
2012 Jeep Grand Cherokee Overland 4X4 - Hemi V-8
Mineral Grey with Saddle interior / Quadra Lift / ACC / BSW / FCW / Pano-roof /
aFe Pro-Dry S Filter / Borla Cat-Back Exhaust
Reply With Quote
  #11  
Old 07-11-2012, 07:55 AM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 48,846
Thanks: 833
Thanked 823 Times in 634 Posts
Rep Power: 7717427
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Ready for some tuning? Look here!

Quote:
Originally Posted by jgc4ever View Post
The engines are designed to run at high temps. Reducing the temp could be a mistake.

this is still a basic internal combustion engine....running cooler, ingesting cooler air aides in better hp and will not damage it at all. Even Chrysler is gonna use FI on this powerplant. All of the specs of the engine say its perfect for forced induction.
__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED Edition" 1 of 1
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2013 JKU 10th anniversary-white
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #12  
Old 07-13-2012, 08:23 PM
FAUEE's Avatar
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Feb 2012
Location: Hickory, NC
Posts: 941
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 4544
FAUEE has a reputation beyond reputeFAUEE has a reputation beyond reputeFAUEE has a reputation beyond reputeFAUEE has a reputation beyond reputeFAUEE has a reputation beyond reputeFAUEE has a reputation beyond reputeFAUEE has a reputation beyond reputeFAUEE has a reputation beyond reputeFAUEE has a reputation beyond reputeFAUEE has a reputation beyond reputeFAUEE has a reputation beyond repute
Re: Ready for some tuning? Look here!

Quote:
Originally Posted by Scottina06 View Post
this is still a basic internal combustion engine....running cooler, ingesting cooler air aides in better hp and will not damage it at all. Even Chrysler is gonna use FI on this powerplant. All of the specs of the engine say its perfect for forced induction.
You're confusing a few concepts here into one big concept.

What he's saying is right, a warmed up engine is more efficient, and engines have operating temperatures they're designed for, and use more fuel until they reach that temperature. Lowering the temperature the engine is trying to run at may put it out of balance, and reduce efficiency.

What you're thinking of is the temperature of intake air. It's a common misconception that colder air is better always. Cooler air is denser, and thus, requires more gas to achieve the correct mixture. Where people get tripped up is that since the air is denser, and more gas is injected, you get more power. You're not getting more power from the air, you're getting more power because you're injecting more gas in to offset the extra air.

Truthfully, a hot air intake is better for fuel economy, as hot air is less dense, and thus less gas is injected for combustion. Less gas injected = higher fuel economy.
__________________

__________________
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
Predator tuning help 4.whoa Performance Modifications 6 11-04-2011 11:29 AM
6.4 Tuning ability? QuickOne Grand Cherokee SRT - WK2 17 07-24-2011 09:30 AM
Next steps - TUNING! jlewissystem Performance Modifications 1 04-12-2011 01:29 PM
Chicagoland dyno tuning? BadLuck NorthCentral 8 03-19-2011 01:34 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:06 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