5.7L Hemi - where's the horsepower hiding? - Page 7 - Jeep Garage - Jeep Forum

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

Reply
 
Thread Tools Display Modes
 
  #73  
Old 12-09-2015, 07:51 AM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Apr 2015
Location: SW FL
Posts: 44
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 863
Kduniverse is on a distinguished road
Re: 5.7L Hemi - where's the horsepower hiding?

Comments like "go buy a Challenger" or the like are just ridiculous. When you have 360hp in any vehicle, it should feel like there's some power there. The 2015 R/T Challenger weighs more than my Jeep, according to Edmunds, so why is that a better option? Can't be the 15 additional hp. The fact is the Jeep feels sluggish, slow and under powered. I'm still new to Jeep, but find a complete lack of information in terms of real specifics. Hell, even the service manual is limited on info! What is the difference with HEMI's in different vehicles and the Jeep? Intake manifolds and cams?

Reply With Quote
Sponsored Links
Advertisement
 
  #74  
Old 12-09-2015, 08:06 AM
billt's Avatar
Senior Member
My Jeep: 2015 5.7L WK2
 
Join Date: Mar 2015
Location: Glendale, Arizona
Posts: 1,470
Thanks: 377
Thanked 323 Times in 219 Posts
Rep Power: 18276
billt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond repute
Re: 5.7L Hemi - where's the horsepower hiding?

Quote:
Originally Posted by Kduniverse View Post
Comments like "go buy a Challenger" or the like are just ridiculous. When you have 360hp in any vehicle, it should feel like there's some power there. The 2015 R/T Challenger weighs more than my Jeep, according to Edmunds, so why is that a better option? Can't be the 15 additional hp. The fact is the Jeep feels sluggish, slow and under powered. I'm still new to Jeep, but find a complete lack of information in terms of real specifics. Hell, even the service manual is limited on info! What is the difference with HEMI's in different vehicles and the Jeep? Intake manifolds and cams?
Perhaps you are expecting too much. The HEMI powered Grand Cherokee is a 2-1/2 ton SUV capable of towing 7,000 pounds. It's not a stop light Grand Prix machine, or was it designed to be. And you don't think it has enough power?? It sure seems like it has when I hit the throttle on mine. If you want more, you should have bought the SRT.
Reply With Quote
The Following User Says Thank You to billt For This Useful Post:
  #75  
Old 12-09-2015, 08:16 AM
Member
My Jeep: 2015 3.0L WK2
 
Join Date: Oct 2015
Location: VT
Posts: 252
Thanks: 14
Thanked 42 Times in 37 Posts
Rep Power: 884
bermie63 is on a distinguished road
Re: 5.7L Hemi - where's the horsepower hiding?

i can honestly say if you went with johan or hemifever for a tune and some air in and out, you'd find some power. its got the potential, but that's about it. if you really want to feel power, the cam and heads are the way to go. they also make matching throttle bodies and intake manifiolds... I would suggest High horse performance out of Delaware. highly recommened! 400 hp from the wheels all day!

this was the way I was gonna go, but decided on a diesel, because they're finally finding ways to tune em.

GOOD LUCK - DO IT!
Reply With Quote
Sponsored Links
Advertisement
 
  #76  
Old 12-09-2015, 08:51 AM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Apr 2015
Location: SW FL
Posts: 44
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 863
Kduniverse is on a distinguished road
Re: 5.7L Hemi - where's the horsepower hiding?

No, just expecting what it should feel like. Doesn't need to be a "stop light Grand Prix machine" to feel as it should. Just because it's an SUV doesn't really mean a thing. What about the X5M or the Porsche SUV's? Your point that it's an SUV is moot. And I know most people are jaded by today's hp ratings, but 360hp should still feel like something, not a sluggish boat. I guess what you feel when you hit the throttle is open to interpretation. Just like your 10 may be my 4.


Quote:
Originally Posted by billt View Post
Perhaps you are expecting too much. The HEMI powered Grand Cherokee is a 2-1/2 ton SUV capable of towing 7,000 pounds. It's not a stop light Grand Prix machine, or was it designed to be. And you don't think it has enough power?? It sure seems like it has when I hit the throttle on mine. If you want more, you should have bought the SRT.
Reply With Quote
  #77  
Old 12-09-2015, 08:56 AM
Member
My Jeep: 2014 5.7L WK2
 
Join Date: Jul 2013
Location: Beech Mountain, NC
Posts: 525
Thanks: 19
Thanked 70 Times in 51 Posts
Rep Power: 7203
2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute2014RedHemiGC has a reputation beyond repute
Re: 5.7L Hemi - where's the horsepower hiding?

Quote:
Originally Posted by Kduniverse View Post
Comments like "go buy a Challenger" or the like are just ridiculous. When you have 360hp in any vehicle, it should feel like there's some power there. The 2015 R/T Challenger weighs more than my Jeep, according to Edmunds, so why is that a better option? Can't be the 15 additional hp. The fact is the Jeep feels sluggish, slow and under powered. I'm still new to Jeep, but find a complete lack of information in terms of real specifics. Hell, even the service manual is limited on info! What is the difference with HEMI's in different vehicles and the Jeep? Intake manifolds and cams?
The axle ratio for the older Hemi's was 3.73 compared to the much taller 3.09 ratio used currently for better fuel economy. That taller ratio adversely affects acceleration, although the 8 speed's ratios help somewhat.

My Jeep weighs almost 5200 lbs. Edmonds must have had The entire staff inside that Challenger on the scales!
__________________
2014 Jeep GC Limited 4X4 V8 QD2
2012 Cadillac CTS-V Coupe
2011 Chevy Corvette Z06/07
Reply With Quote
The Following User Says Thank You to 2014RedHemiGC For This Useful Post:
  #78  
Old 12-09-2015, 09:07 AM
Member
My Jeep: 2015 3.0L WK2
 
Join Date: Oct 2015
Location: VT
Posts: 252
Thanks: 14
Thanked 42 Times in 37 Posts
Rep Power: 884
bermie63 is on a distinguished road
Re: 5.7L Hemi - where's the horsepower hiding?

Quote:
Originally Posted by 2014RedHemiGC View Post
The axle ratio for the older Hemi's was 3.73 compared to the much taller 3.09 ratio used currently for better fuel economy. That taller ratio adversely affects acceleration, although the 8 speed's ratios help somewhat.

My Jeep weighs almost 5200 lbs. Edmonds must have had The entire staff inside that Challenger on the scales!
BOOM! GEARS! 3.55's or 3.73's!
Reply With Quote
  #79  
Old 12-09-2015, 09:14 AM
overlanding's Avatar
Senior Member
 
Join Date: May 2012
Posts: 1,877
Thanks: 1,146
Thanked 359 Times in 301 Posts
Rep Power: 9155
overlanding has a reputation beyond reputeoverlanding has a reputation beyond reputeoverlanding has a reputation beyond reputeoverlanding has a reputation beyond reputeoverlanding has a reputation beyond reputeoverlanding has a reputation beyond reputeoverlanding has a reputation beyond reputeoverlanding has a reputation beyond reputeoverlanding has a reputation beyond reputeoverlanding has a reputation beyond reputeoverlanding has a reputation beyond repute
5.7L Hemi - where's the horsepower hiding?

Quote:
Originally Posted by 2014RedHemiGC View Post
The axle ratio for the older Hemi's was 3.73 compared to the much taller 3.09 ratio used currently for better fuel economy. That taller ratio adversely affects acceleration, although the 8 speed's ratios help somewhat.

Just kidding
Reply With Quote
  #80  
Old 12-09-2015, 09:16 AM
Strongjeff's Avatar
Project Six Shooter V2 / ROUSH Prototype Tech

My Jeep: 2008 3.7L WK
 
Join Date: Sep 2012
Location: Woodhaven, MI
Posts: 9,044
Thanks: 420
Thanked 667 Times in 598 Posts
Rep Power: 340268
Strongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond repute
Garage
Quote:
Originally Posted by bermie63 View Post

BOOM! GEARS! 3.55's or 3.73's!
I'd go 3.73
__________________
Reply With Quote
  #81  
Old 12-09-2015, 09:25 AM
GoPlzGo's Avatar
formerly 14summithemi
My Jeep: 2015 6.4L SRT WK2
 
Join Date: Oct 2013
Location: Cleveland, OH
Posts: 3,509
Thanks: 492
Thanked 665 Times in 546 Posts
Rep Power: 26133
GoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond reputeGoPlzGo has a reputation beyond repute
Quote:
Originally Posted by overlanding View Post

The Jeep website says 3.45 ratio for the Hemi.
That's with the V6/Diesel, Hemi's get 3.09 gears in the rear.
__________________
'15 JGC SRT Bright White Red Vapor...Borla ATAK Cat-back w/ ceramic coated axle-back, aFe Momentum GT Pro 5R Stage-2 Intake & Billet Tech Oil Catch Can
Reply With Quote
  #82  
Old 12-09-2015, 09:33 AM
Strongjeff's Avatar
Project Six Shooter V2 / ROUSH Prototype Tech

My Jeep: 2008 3.7L WK
 
Join Date: Sep 2012
Location: Woodhaven, MI
Posts: 9,044
Thanks: 420
Thanked 667 Times in 598 Posts
Rep Power: 340268
Strongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond reputeStrongjeff has a reputation beyond repute
Garage
Quote:
Originally Posted by 14SummitHemi View Post

That's with the V6/Diesel, Hemi's get 3.09 gears in the rear.
And that right there is why the hemi feels sluggish when you compare it to a hemi challenger
__________________
Reply With Quote
  #83  
Old 12-09-2015, 09:42 AM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Apr 2015
Location: SW FL
Posts: 44
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 863
Kduniverse is on a distinguished road
Re: 5.7L Hemi - where's the horsepower hiding?

Quote:
Originally Posted by 2014RedHemiGC View Post
The axle ratio for the older Hemi's was 3.73 compared to the much taller 3.09 ratio used currently for better fuel economy. That taller ratio adversely affects acceleration, although the 8 speed's ratios help somewhat.

My Jeep weighs almost 5200 lbs. Edmonds must have had The entire staff inside that Challenger on the scales!

Apologies, they only state gross not curb weight.

How do I know which rear end I have? Did 5.7's come with a specific ratio? I'm 4x2. I agree, this would be a huge improvement. Was one of the first things Corvette guys did on C4's.
Reply With Quote
  #84  
Old 12-09-2015, 11:47 AM
billt's Avatar
Senior Member
My Jeep: 2015 5.7L WK2
 
Join Date: Mar 2015
Location: Glendale, Arizona
Posts: 1,470
Thanks: 377
Thanked 323 Times in 219 Posts
Rep Power: 18276
billt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond reputebillt has a reputation beyond repute
Re: 5.7L Hemi - where's the horsepower hiding?

Quote:
Originally Posted by Kduniverse View Post
What about the X5M or the Porsche SUV's?
What about them? For Christ's sake you could buy 2 Grand Cherokees for what a Porsche SUV costs. Why don't you compare it to a Ferrari Enzo?
Reply With Quote
Reply

Tags
hemi

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
Not hiding - cashing in idea New Members - Welcome! 4 08-12-2012 03:31 PM
Hiding Cables Behind Dash muzicman82 Grand Cherokee - WK2 - 4 05-11-2012 12:12 AM
Hiding places...copying from WK thread TJXJWJ Grand Cherokee - WJ 16 03-04-2012 05:04 PM
What is that big plastic cover hiding... BLACK DOG Performance Modifications 8 08-20-2010 02:32 PM

» Premium Vendor Showcase
Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:37 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.