Gear Question, which do you prefer?
01-05-2012 | 10:46 PM
#11
JK Super Freak
Joined: Dec 2010
Posts: 1,060
Likes: 0
From: South Carolina
FAQ's --> Drivetrain section --> RPM charts
Use 'actual' measured tire heights.
Auto, 3.73, 31" tires (guessing on actual height of stock 32's) =
1953 rpm @ 70
Auto, 3.73, 34" tires (guessing on actual height of 35's) =
1781 rpm @ 70
Auto, 3.73, 34" tires --> OD OFF
(1781 / .69 =)
2581 rpm @ 70
Auto, 5.13, 34" =
2450 rpm @ 70
Auto, 5.38, 34" =
2569 rpm @ 70
Soooo,
35's with 3.73's and OD Off = 35's with 5.38's and OD On
Drive with the 35's and OD Off and see how you like the performance. Good as is, go to 5.38. If you want lower rpm's, go 5.13.
Use 'actual' measured tire heights.
Auto, 3.73, 31" tires (guessing on actual height of stock 32's) =
1953 rpm @ 70
Auto, 3.73, 34" tires (guessing on actual height of 35's) =
1781 rpm @ 70
Auto, 3.73, 34" tires --> OD OFF
(1781 / .69 =)
2581 rpm @ 70
Auto, 5.13, 34" =
2450 rpm @ 70
Auto, 5.38, 34" =
2569 rpm @ 70
Soooo,
35's with 3.73's and OD Off = 35's with 5.38's and OD On
Drive with the 35's and OD Off and see how you like the performance. Good as is, go to 5.38. If you want lower rpm's, go 5.13.
Very well done! It will be 5.13's!
01-06-2012 | 07:09 AM
#12
JK Junkie
Joined: Nov 2010
Posts: 3,802
Likes: 3
From: Kitchener
Originally Posted by sodapop
I'm a 70 MPH guy anyway, no leadfoot here. Thanks for the info. Just curious, what superchips program are you using and what's your average MPG? I have a superchips and really couldn't tell the difference between 91 or 87.
Thanx!
01-06-2012 | 07:31 AM
#13
Thread Starter
JK Enthusiast
Joined: Nov 2006
Posts: 163
Likes: 0
From: Earth
Originally Posted by robsjeep9
I'm not a lead foot either...... Gee I've always meant to experiment with my superchip but haven't yet. I've kept it at 87 I hear if you upgrade your gas and run 91 you see a bit of a difference. But I've never tried that yet.
Thanx, have a good one!
