513s RPM range

Jeeper714

Member
I just got 513s installed in my 14 JKR Automatic last week...

At 65mph - I'm at 3000 rpms - is this a normal range for running 315/70r17 Duratracs.

- Slabs and 37" Toyos get installed on Friday
 

cozdude

Guy with a Red 2-Door
I just got 513s installed in my 14 JKR Automatic last week...

At 65mph - I'm at 3000 rpms - is this a normal range for running 315/70r17 Duratracs.

- Slabs and 37" Toyos get installed on Friday

based off the chart in the noobie FAQ, yes it is right

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Jeeper714

Member
based off the chart in the noobie FAQ, yes it is right

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Yeah I've looked at that but wanted to double check since people raved about getting their mpgs/Eco back once they regeared - both of which have shit the bed for me since the regear.
 

cozdude

Guy with a Red 2-Door
Yeah I've looked at that but wanted to double check since people raved about getting their mpgs/Eco back once they regeared - both of which have shit the bed for me since the regear.

well for me personally i didnt really notice a MPG increase as much as a power increase when i regeared. my mpg did improve on the highway by stayed the same around town. also i have the 3.8 with 5.13's and 35's so my results will be different from yours. im sure once you put the 37's on you will notice the results you were looking for since your RPM's will decrease.
 

ZuidJK

New member
I just got 513s installed in my 14 JKR Automatic last week...

At 65mph - I'm at 3000 rpms - is this a normal range for running 315/70r17 Duratracs.

- Slabs and 37" Toyos get installed on Friday

With 5.13s and the 3.8 on 37 with slabs..at 80km/h in 6th I'm at about 1800rpm..I think that's about 55mph....?
 

mrmike

New member
Let us know how you like it with the 37's. I'm on 37's with stock rubicon 4.10 gears. Hoping to regear next month. I'm holding right around 14mpg with KM2s. It was lower with 37" Nittos. And about 1/2 mpg better with 35" Toyo.
 

SDG

Caught the Bug
I think I cruise at about 75 and 3k? Thats with the 3.6, 5.13, and 37s on slabs @ 30psi.

Gas mileage, mixed driving over 5 tanks was about 13.6 mpg. Long drives on the freeway with minimal traffic at 75 is around 18mpg, at 80 its closer to 16. But its all variable.

500 mile drive into a strong headwind I averaged 10.5 mpg, same drive in reverse with no wind was 16.
 

Sithwindu

Member
I think I cruise at about 75 and 3k? Thats with the 3.6, 5.13, and 37s on slabs @ 30psi.

Gas mileage, mixed driving over 5 tanks was about 13.6 mpg. Long drives on the freeway with minimal traffic at 75 is around 18mpg, at 80 its closer to 16. But its all variable.

500 mile drive into a strong headwind I averaged 10.5 mpg, same drive in reverse with no wind was 16.

Is it sad that I'm on 35's with 3.6 liter and 3.73 gears and I have waaaaay worse milage! Lol
 

StrizzyChris

New member
No. You would - 4.56 is good for you. Thats what ill be getting!

Yup...

4.56 if you never plan to ever go over 35's and want the ability to go back to stock without super high RPM's when you do at highway speeds.

4.88 if you think it's at all possible that you'll eventually go 37's
 

Sithwindu

Member
Yup...

4.56 if you never plan to ever go over 35's and want the ability to go back to stock without super high RPM's when you do at highway speeds.

4.88 if you think it's at all possible that you'll eventually go 37's

Well 37's will certainly be in the future, 5.13 are gonna be the gears I ventually go to, I'd hate to go 4.88 and regret not getting more power heh
 

wayoflife

Administrator
Staff member
I just got 513s installed in my 14 JKR Automatic last week...

At 65mph - I'm at 3000 rpms - is this a normal range for running 315/70r17 Duratracs.

- Slabs and 37" Toyos get installed on Friday

Typically, I would recommend 5.13's with a set of 37" tires and that would put your RPM's at about 3k when running more like 70+MPH. Being that you are most likely running something closer to a small 37 or big 35, yeah, that sounds about right depending on what your tires actually measure out to.
 

Jeeper714

Member
Typically, I would recommend 5.13's with a set of 37" tires and that would put your RPM's at about 3k when running more like 70+MPH. Being that you are most likely running something closer to a small 37 or big 35, yeah, that sounds about right depending on what your tires actually measure out to.

Thanks Eddie.

My slabs and 37s were installed yesterday so I'm back to a normal rpm range!

ImageUploadedByWAYALIFE1408806750.452748.jpg
 
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