Will gears help mpg
JK Freak
Joined: Jun 2011
Posts: 598
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From: Little Rock
JK Jedi Master
Joined: Feb 2008
Posts: 12,906
Likes: 185
From: Maine
Did your conversation with the engineer also address an engine's efficiency at certain rpm's?
Yes, torque is key. However, it's more horsepower that gets the work done at a faster rate.
You can gear a bicycle down (increase torque) to where you can pull a box car, but progress will be very slow.
It takes more horsepower (the locomotive) to do it at an acceptable speed.
Yes, torque is key. However, it's more horsepower that gets the work done at a faster rate.
You can gear a bicycle down (increase torque) to where you can pull a box car, but progress will be very slow.
It takes more horsepower (the locomotive) to do it at an acceptable speed.
If the Jeep's engine isn't allowed to turn fast enough, it won't produce enough horsepower to move the Jeep efficiently.
In fact, looking at most dyno sheets, torque drops off as horsepower continues to climb, simply by turning the engine faster, allowing it to perform more work in a given time.
Last edited by ronjenx; Mar 1, 2012 at 06:47 AM.
JK Junkie
Joined: Jul 2008
Posts: 3,017
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From: Lakewood, OH
I am keenly aware of what torque and horsepower are. I've raced both small and big block engines for the better part of thirty years. I don't need to ask a rocket surgeon about this stuff as I'm confident in my knowledge, it's application and the results. Taking pictures driving around at 50mph and 1500 rpms won't change my mind either. It's simply not a target velocity for most people, but hey, I'm glad it works for you.
JK Newbie
Joined: Oct 2011
Posts: 97
Likes: 0
From: Chillicothe, Il.
Have I told you guys I love you lately?
Seriously you guys are making me smile!
Aaanyway.... I have a 2012 Rubicon Unlimited with an automatic on order. I buying 37s and don't want to change the gears out right at first. I'm thinking I should be ok with the Penistar and the 5spd auto and 4:10s at least until I get a chance to swap gears.
Am I foggy brained for thinking this?
Seriously you guys are making me smile!
Aaanyway.... I have a 2012 Rubicon Unlimited with an automatic on order. I buying 37s and don't want to change the gears out right at first. I'm thinking I should be ok with the Penistar and the 5spd auto and 4:10s at least until I get a chance to swap gears.
Am I foggy brained for thinking this?
JK Super Freak
Joined: Dec 2008
Posts: 1,593
Likes: 2
From: Prescott, AZ
Originally Posted by surf9
Itsa a JEEP!! Fuck MPG, buy a car! And yes, mine is my daily driver.
JK Junkie
Joined: Jul 2008
Posts: 3,017
Likes: 0
From: Lakewood, OH
Have I told you guys I love you lately?
Seriously you guys are making me smile!
Aaanyway.... I have a 2012 Rubicon Unlimited with an automatic on order. I buying 37s and don't want to change the gears out right at first. I'm thinking I should be ok with the Penistar and the 5spd auto and 4:10s at least until I get a chance to swap gears.
Am I foggy brained for thinking this?
Seriously you guys are making me smile!
Aaanyway.... I have a 2012 Rubicon Unlimited with an automatic on order. I buying 37s and don't want to change the gears out right at first. I'm thinking I should be ok with the Penistar and the 5spd auto and 4:10s at least until I get a chance to swap gears.
Am I foggy brained for thinking this?
JK Newbie
Joined: Oct 2011
Posts: 97
Likes: 0
From: Chillicothe, Il.
Originally Posted by JPop
I think you'll be good, it's on the cusp and I'd drive it as is for a while to see where you'd really like to end up with a gear swap. Also, depending on actual size of your 37s, could be just perfect for you.
Also been reading up on tires. I've always had one type or another of Swampers which I LOVE but don't want that much aggression in a tread. Any thoughts? Note; daily driver.
