What are your RPM's @ 70 MPH? - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 16 Old 04-11-2008, 02:34 PM Thread Starter
UTAH
Registered User
 
UTAH's Avatar
 
Join Date: Jul 2003
Location: Salt Lake City
Posts: 1,422
What are your RPM's @ 70 MPH?

Khaki Patriot 4x4 Ltd. w/FDII

I'm curious about any gearing differences between the models (Compass, Patriot, 4x4, stick and auto).

I'm running exactly 3,000 RPM's at 70 MPH*. That's about 113 KPH for our metric-based friends.

* Speed verified

Bill


'97 Land Rover D90
'03 TJ Rubicon
'14 JK-8 Freedom Edition
'14 KL Cherokee Trailhawk
UTAH is offline  
Sponsored Links
Advertisement
 
post #2 of 16 Old 04-11-2008, 03:30 PM
davep
Registered User
2007 MK Compass 
 
Join Date: Apr 2008
Location: Eugene OR
Posts: 42
Seems high, I was just on the freeway going 70ish and I don't think I ever saw my RPM exceed 2500 while using cruise control. Maybe even lower than that. Compass CVT2 4x4
davep is offline  
post #3 of 16 Old 04-11-2008, 03:42 PM Thread Starter
UTAH
Registered User
 
UTAH's Avatar
 
Join Date: Jul 2003
Location: Salt Lake City
Posts: 1,422
Quote:
Originally Posted by davep View Post
Seems high...
Yes - that's why I'm curious. Yours @ 2500 is about where I thought I'd be. Heck, my JK runs 2300 RPM's @ 70.

Is it because of the FDII?

Bill

'97 Land Rover D90
'03 TJ Rubicon
'14 JK-8 Freedom Edition
'14 KL Cherokee Trailhawk
UTAH is offline  
post #4 of 16 Old 04-11-2008, 04:38 PM
Argent33
Registered User
2014 JK Wrangler 
 
Join Date: Feb 2008
Location: Canton
Posts: 339
I think my Compass 4x4 5-Speed runs about 3000rpm at 70

~Paul

-[O l l l l l l l O]- 2014 Freedom Edition JKU - Hydro Blue 6-Spd
Argent33 is offline  
post #5 of 16 Old 04-11-2008, 04:42 PM
Gramps
The Necessary Evil
 
Gramps's Avatar
2007 MK Compass 
 
Join Date: Aug 2006
Location: Madison/Janesville
Posts: 5,623
FD II's are geared lower and yours sounds about right UTAH.

CVT's are:
FDII is 3.21:1
FD I is 2.41:1
5 Spd is 3.33:1 (I've seen a report that this may have changed in '08.)

Going with a taller tire will help a little and of course slowing down, but that may be hard to do in if you want to keep from getting run over.

Bob

Artificial intelligence is no substitute for natural stupidity

MK Skid Plate fasteners for sale posts 68 & 69

Also visit me at Photobucket
'06 WK Grand Cherokee Limited Quadra-Drive II, 5.7
'07 MK Compass Limited 4X4, AutoStick
Gramps is offline  
post #6 of 16 Old 04-11-2008, 05:48 PM Thread Starter
UTAH
Registered User
 
UTAH's Avatar
 
Join Date: Jul 2003
Location: Salt Lake City
Posts: 1,422
Thanks. Good info.

The engine does seem right in the groove at 3,000 RPM's, it's smooth and still has plenty of headroom. And, it does not seem to be hurting MPG (which was @ 22.5 for the first tank). I figure I'll probably get around 24 MPG once it breaks in. It's just revving higher than I'm used to.

Bill

'97 Land Rover D90
'03 TJ Rubicon
'14 JK-8 Freedom Edition
'14 KL Cherokee Trailhawk
UTAH is offline  
post #7 of 16 Old 04-11-2008, 06:37 PM
Gramps
The Necessary Evil
 
Gramps's Avatar
2007 MK Compass 
 
Join Date: Aug 2006
Location: Madison/Janesville
Posts: 5,623
That's not bad at all for an FD II! Are you going down hill both ways?

Bob

Artificial intelligence is no substitute for natural stupidity

MK Skid Plate fasteners for sale posts 68 & 69

Also visit me at Photobucket
'06 WK Grand Cherokee Limited Quadra-Drive II, 5.7
'07 MK Compass Limited 4X4, AutoStick
Gramps is offline  
post #8 of 16 Old 04-11-2008, 06:53 PM Thread Starter
UTAH
Registered User
 
UTAH's Avatar
 
Join Date: Jul 2003
Location: Salt Lake City
Posts: 1,422
Quote:
Originally Posted by Gramps View Post
Are you going down hill both ways?
Awww... just using the cruise as much as possible and driving relatively sanely.

Bill

'97 Land Rover D90
'03 TJ Rubicon
'14 JK-8 Freedom Edition
'14 KL Cherokee Trailhawk
UTAH is offline  
post #9 of 16 Old 04-14-2008, 07:00 PM
Elihawk
Registered User
2008 MK Compass 
 
Join Date: Apr 2008
Location: Iowa City
Posts: 162
My compass

at 70 was running 2,5-2,600 rpm...when I hit 3,000 rpm, I was doing 78
Elihawk is offline  
post #10 of 16 Old 04-14-2008, 07:42 PM
Snowplow
Registered User
 
Snowplow's Avatar
2003 TJ Wrangler 
 
Join Date: Dec 2006
Posts: 398
My rallye with the 5 speed manual runs at 2300 to 2500 rpms at 70
Snowplow is offline  
post #11 of 16 Old 04-16-2008, 11:34 AM
Urr
Registered User
 
Join Date: Oct 2007
Location: EST
Posts: 192
CRD with the 6 speed manual runs with a bit more than 2400 rpms at 70.

Happiness is not a goal, but a lifestyle
Ex 2007 Jeep Compass Sport 4x4 CRD in action :)
DD 2011 Mitsubishi ASX Invite 4WD DiD
In bright and happy future: Jeep Wrangler
Urr is offline  
post #12 of 16 Old 04-16-2008, 12:43 PM
Argent33
Registered User
2014 JK Wrangler 
 
Join Date: Feb 2008
Location: Canton
Posts: 339
Hmm wonder how come my Rallye 5 Speed runs higher....

~Paul

-[O l l l l l l l O]- 2014 Freedom Edition JKU - Hydro Blue 6-Spd
Argent33 is offline  
post #13 of 16 Old 04-16-2008, 01:02 PM
Urr
Registered User
 
Join Date: Oct 2007
Location: EST
Posts: 192
Quote:
Originally Posted by Argent33 View Post
Hmm wonder how come my Rallye 5 Speed runs higher....
Absolutely it does, but relatively not...
Diesel's "red zone" begins @ 4500, your's may-be at @ 6000?

Happiness is not a goal, but a lifestyle
Ex 2007 Jeep Compass Sport 4x4 CRD in action :)
DD 2011 Mitsubishi ASX Invite 4WD DiD
In bright and happy future: Jeep Wrangler
Urr is offline  
post #14 of 16 Old 04-16-2008, 01:52 PM
steel5blue
Registered User
2007 MK Compass 
 
Join Date: Apr 2007
Location: marin county california
Posts: 60
Quote:
Originally Posted by Argent33 View Post
Hmm wonder how come my Rallye 5 Speed runs higher....
So does mine (about 3000+ rpm at 70). They must have changed the gear ratios on the 2008 5-speed.
Can any other 07 and 08 5-speeders chime in?-



Rav-who? CR-what? Arizona-where?
2007 Compass Sport Steel-5speed-Blue 4X4

Last edited by steel5blue; 04-16-2008 at 01:55 PM. Reason: add
steel5blue is offline  
post #15 of 16 Old 04-16-2008, 02:32 PM
Gramps
The Necessary Evil
 
Gramps's Avatar
2007 MK Compass 
 
Join Date: Aug 2006
Location: Madison/Janesville
Posts: 5,623
It looks like the final drive ratio on the 5 speed went from 4.12 in '07 to 3.91 in '08. Here's the '08 specs:

http://www.jeep.com/en/2008/patriot/# Features and Specs, Technical Data.

Assuming they kept the same trans ratios:

1st - 3.77
2nd - 2.16
3rd - 1.41
4th - 1.026
5th - 0.81
Transaxle Ratio - 4.12 ('07); 3.91 ('08)

This calculates out to 15.53:1 in low and 3.33 in high for '07; 14.74 in low and 3.16 in high for '08.

Bob

Artificial intelligence is no substitute for natural stupidity

MK Skid Plate fasteners for sale posts 68 & 69

Also visit me at Photobucket
'06 WK Grand Cherokee Limited Quadra-Drive II, 5.7
'07 MK Compass Limited 4X4, AutoStick
Gramps is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome