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
 
  #13  
Old 03-31-2012, 11:28 AM
ColdCase's Avatar
Senior Member
 
Join Date: Apr 2011
Posts: 1,445
Thanks: 0
Thanked 26 Times in 25 Posts
Rep Power: 26315
ColdCase has a reputation beyond reputeColdCase has a reputation beyond reputeColdCase has a reputation beyond reputeColdCase has a reputation beyond reputeColdCase has a reputation beyond reputeColdCase has a reputation beyond reputeColdCase has a reputation beyond reputeColdCase has a reputation beyond reputeColdCase has a reputation beyond reputeColdCase has a reputation beyond reputeColdCase has a reputation beyond repute
Re: Performance

Quote:
Originally Posted by IRISH View Post
So I had my 5.7 Overland out today for the first time since I purchased it. The Jeep only has 70 klms on it, and what bothers me is that this thing is slow and the revs build so slow, I only hope it improves with more kilometres, my WK would have walked all over it when it was new.
These are hurt by the transmission programing and relatively tall gearing, once you get about 1000 miles and learn how to shift manually based on what you want, you will be much happier. MPG will take a deep dip, but the vehicle may be much more fun to drive. The vehicle feels better in sport and tow/haul mode. The gearing is still pretty tall for traffic light contests, however. Mine now runs so well (20,000 miles), I'm not sure what more to ask for on the street.
__________________

__________________
Reply With Quote
  #14  
Old 03-31-2012, 03:15 PM
jgc4ever's Avatar
Senior Member
My Jeep: 2012 5.7L WK2
 
Join Date: Mar 2011
Posts: 3,055
Thanks: 0
Thanked 73 Times in 64 Posts
Rep Power: 1159756
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: Performance

1 year 5 months until 2014 model is available.

Also, if streets are dry use Sport Mode for more responsive acceleration, and use autostick as needed.
__________________

__________________
Reply With Quote
  #15  
Old 03-31-2012, 06:59 PM
Premium Member
My Jeep: 2012 5.7L WK2
 
Join Date: Nov 2011
Location: NH
Posts: 84
Thanks: 4
Thanked 0 Times in 0 Posts
Rep Power: 1072
Sliter'12Overland has a reputation beyond reputeSliter'12Overland has a reputation beyond reputeSliter'12Overland has a reputation beyond reputeSliter'12Overland has a reputation beyond reputeSliter'12Overland has a reputation beyond repute
Re: Performance

Sport mode is the only way to drive the auto setting is a dog. I have the Mopar CAI and the difference between sport and auto is crazy, even in snow and sand sport works just fine if you have QDII because the active torque distribution still goes to the wheels with grip.
__________________
Reply With Quote
  #16  
Old 03-31-2012, 07:03 PM
Member
My Jeep: 2012
 
Join Date: Jun 2011
Location: AZ
Posts: 45
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 1172
drwaldo69 has a reputation beyond reputedrwaldo69 has a reputation beyond reputedrwaldo69 has a reputation beyond reputedrwaldo69 has a reputation beyond reputedrwaldo69 has a reputation beyond repute
Re: Performance

Sport mode makes it much more responsive for my type of driving. Have noticed no difference in the tow mode. Weird, but I think around town it seems to run better if I leave it in 4th from light to light if I'm flooring it. That might be totally in my head but the sport mode is nice. It does seem to handle better with the 20/80 torque split and 1/2inch lower.
Also, putting it in 5th on the highway before passing seems to run better by pulling harder right away. In D it seems almost like it is slow to reactivate all the cylinders from ECO mode. I know the ECO goes out right away but makes me wonder if there is a delay. BTW, the gearing does make the 55mph punch pretty impressive. Mine has 9000 mi and it does run nice.
__________________
Reply With Quote
  #17  
Old 03-31-2012, 07:06 PM
FlyinRyan's Avatar
Senior Member
My Jeep: 2002 4.7L WJ
 
Join Date: Jul 2009
Location: Fort Myers, Florida
Posts: 2,797
Thanks: 33
Thanked 29 Times in 28 Posts
Rep Power: 87938
FlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond repute
Send a message via AIM to FlyinRyan
Re: Performance

You'd be amazed at all the different little odds and ends Chrysler adds into the PCM coding to make these trucks "green", and EPA-compliant and all that. ECO mode/MDS, WOT fueling delays, lean VE fueling, and the list goes on. Even just eliminating the WOT delays makes a difference in performance.
__________________
Due to my workload, please do not PM me as I do not regularly check my PMs. Thank you :)
Reply With Quote
  #18  
Old 04-06-2012, 09:42 AM
Member
My Jeep: 2012 5.7L WK2
 
Join Date: Nov 2011
Location: Windermere, FL
Posts: 149
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 30847
fundguy has a reputation beyond reputefundguy has a reputation beyond reputefundguy has a reputation beyond reputefundguy has a reputation beyond reputefundguy has a reputation beyond reputefundguy has a reputation beyond reputefundguy has a reputation beyond reputefundguy has a reputation beyond reputefundguy has a reputation beyond reputefundguy has a reputation beyond reputefundguy has a reputation beyond repute
Re: Performance

Programming shift points will fix a lot of that. Also, did you have hemi and get V6 or both hemi, etc. Current hemi is great. V6 seems slow.
__________________
'12 Overland Summit Mineral Gray, Hemi, chrome pkg.
'08 BMW 335i Convertable, Laser Jamers, JB3 chip, 19x8.5-10, BMW body kit, etc.
'05 Armada LE 4x4, 305-65/20 Terra Grapplers
'95 ZJ 5.2 4x4 Sold but not forgotten.
[SIGPIC][/SIGPIC]
Reply With Quote
  #19  
Old 04-22-2012, 06:53 PM
Member
My Jeep: 2014 5.7L
 
Join Date: Dec 2011
Location: Michigan
Posts: 42
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 906
jchochla is on a distinguished road
Re: Performance

I have a sprint booster in my 2012 mercedes e class, and my 0-60 time had gone down by about .8 seconds. Just got it a few days ago, so that 0-60 number might decrease a little more. I think i might buy a sprint booster for my Overland Hemi...
__________________

__________________
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
3.7L Performance Upgrades Budguy87 Engine Performance/Intake/Exhaust 8 10-31-2012 07:43 PM
Performance upgrades for 5.7 dandnb Performance Modifications 5 04-10-2011 05:05 PM
CAI Intake Performance and Performance Chip White Chocolate Performance Modifications 25 02-14-2011 09:12 PM
5.7 Performance jcostri09 Performance Modifications 9 02-13-2010 12:36 AM
performance ?'s derekblk06rt Troubleshooting/Problems Discussion 22 07-24-2009 07:48 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:57 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