DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum (http://www.ramforumz.com/index.php)
-   Custom Chassis - Drive Line - Suspension - Wheels and Tires - LEVELING (http://www.ramforumz.com/forumdisplay.php?f=261)
-   -   Leveled, new rims, new tires... now horrible gas mileage (http://www.ramforumz.com/showthread.php?t=141991)

Thet 05-11-2013 07:38 PM

Leveled, new rims, new tires... now horrible gas mileage
 
I just leveled my truck, got new rims (17x9 steelies), and added new tires (315/70R17) and now my computer is saying I'm getting about 8.8-9.2 MPG in town. I'm not driving it like an idiot, so I know it's not my foot. I know the rims and tires are heavier than my stock 20" rims/33" tires combo, but would that make THIS much of a difference? I was getting about 14 MPG in town. On the highway, my MPG goes up to about 12. I have the 3.92 gears.

Any ideas?

When will the new tuners be available for the 2013 models? I for some reason thought I remember them not being out quite yet...

Grubrunner 05-11-2013 08:38 PM

Have you calibrated your speedometer to compensate for the changes?

Thet 05-11-2013 08:44 PM

Is that something the dealer can do?

Grubrunner 05-11-2013 08:55 PM

No idea whether the dealership can calibrate the speedomter.

Hypertech makes a plug-n-play tuner that ONLY calibrates the speedometer to compensate for tire/wheel changes. I purchased one after my shoe modifications and it works like a charm.

Bruce E 05-11-2013 08:55 PM

The dealer can re-calibrate for the new tires. Unfortunately they may charge a fee.

Grubrunner 05-11-2013 09:06 PM

I vaguely remember reading on these boards a member saying the dealership can calibrate up to only a certain tire/wheel size.

Don't know.....

Thet 05-11-2013 09:08 PM

I didn't go too much different... I think I went from a 33.1" to a 34.7" tire.

brandonjansen 05-12-2013 03:05 AM

It still makes quite a difference. You're probably out around 4 or 5%. I'd definitely either buy the hypertech or bring it to the dealer.

ADA16 05-12-2013 10:05 AM

Hey everyone why would correcting is speedometer help his mileage?
(I am also thinking about leveling and getting bigger tires)

h2oman 05-12-2013 10:26 AM

It won't make his mileage better. Just more accurate. The bottom line is, when you put large off-road tires on your mileage is going to suffer. If you want a Prius don't buy a Hemi.


All times are GMT -4. The time now is 04:05 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vB.Sponsors
= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger