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| '11 and '12 performance/mpg gain http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=88&t=86934 |
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| Author: | Eric1115 [ Thu Jul 27, 2017 6:29 pm ] |
| Post subject: | '11 and '12 performance/mpg gain |
I have a '12 kk lifted with tires and I'm looking to save on some mpg. I know the earlier years have a different ecu which allows for performance chips and what not that doesn't work with the later years... Anyway I know this topic has been discussed a bunch but I haven't been on here in a while and was hoping someone could update me on this if there have been any updates. Also I know some people do the 4.7 throttle swap but heard the computer adjusts for it after a little time negating the performance gains. Thanks for any help!!! Sent from my Nexus 5X using Tapatalk |
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| Author: | tjkj2002 [ Thu Jul 27, 2017 8:14 pm ] |
| Post subject: | Re: '11 and '12 performance/mpg gain |
Regear,the best and only way once you lift and add bigger tires. |
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| Author: | tommudd [ Fri Jul 28, 2017 9:46 am ] |
| Post subject: | Re: '11 and '12 performance/mpg gain |
Yes best way is a regear. Many will say it costs too much but more gas mileage, will not lug down the engine and your transmission will be happier. Yes even going to say a 245-75-16 etc |
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| Author: | brianb1998 [ Thu Aug 10, 2017 6:21 pm ] |
| Post subject: | Re: '11 and '12 performance/mpg gain |
Also I know some people do the 4.7 throttle swap but heard the computer adjusts for it after a little time negating the performance gains. I would love to hear more about this if anyone knows? I have the 4.7 and also feel like I'm back to the old sluggishness. mostly when at speed. from a stop she still kinda pops up. |
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| Author: | tjkj2002 [ Thu Aug 10, 2017 7:19 pm ] |
| Post subject: | Re: '11 and '12 performance/mpg gain |
brianb1998 wrote: Also I know some people do the 4.7 throttle swap but heard the computer adjusts for it after a little time negating the performance gains. I would love to hear more about this if anyone knows? I have the 4.7 and also feel like I'm back to the old sluggishness. mostly when at speed. from a stop she still kinda pops up. The PCM "learns" and adjusts to get back to what it was programmed to do and to stay in compliance with federal regulations. |
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