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Unread 11-09-2010, 08:16 PM   #16
JIMBOX
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OK, then you obviously flashed the ECM with the 5.13 diff gearsetting, thats what I've done and mine works perfect !!


Quote:
Originally Posted by mthomp83 View Post
i set the procal module for the appropriate tire size which supposedly fixed the speedo, odo, and adjusted the automatic transmission shift points

i tested the speeds with my gps and they seem to be reading correctly

i think that my next upgrade will be gears....
Sorry, I can't say much more

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Unread 11-09-2010, 08:24 PM   #17
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Unread 11-09-2010, 08:25 PM   #18
mthomp83
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ok i didn't change any of the gear ratio's first of all, and i'm pretty sure that would not be beneficial in this situation to change the gear ratio in the computer to something that it is not
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Unread 11-09-2010, 08:25 PM   #19
1222
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Going up steep grades even with 35ís and 5.13ís suck. Itís just a fact of life for the JK. Since you still have 4.10ís itís no wonder you experience what you do. Driving around town will tell you nothing. Itís head winds and moderate to steep grades where youíll learn just how inadequate your combination is. Re-gear if you want to be somewhat happy.
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Unread 11-09-2010, 08:31 PM   #20
mthomp83
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Quote:
Originally Posted by 1222 View Post
Going up steep grades even with 35ís and 5.13ís suck. Itís just a fact of life for the JK. Since you still have 4.10ís itís no wonder you experience what you do. Driving around town will tell you nothing. Itís head winds and moderate to steep grades where youíll learn just how inadequate your combination is. Re-gear if you want to be somewhat happy.
thank you for the response, the hill grades were about 20-25% so it was pretty steep, not much wind though
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Unread 11-09-2010, 08:32 PM   #21
JIMBOX
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Well, this is my last entry, I told you to that I set mine at 5.13 gears-that fools the computer and thats what AEV TELLS YOU TO DO !!!


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Originally Posted by mthomp83 View Post
ok i didn't change any of the gear ratio's first of all, and i'm pretty sure that would not be beneficial in this situation to change the gear ratio in the computer to something that it is not
My Auto shifts better now with big tires than it did STOCK !!

Good luck

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Unread 11-09-2010, 08:41 PM   #22
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Well, this is my last entry... JIMBO
Promise.
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Unread 11-09-2010, 08:46 PM   #23
mthomp83
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Quote:
Originally Posted by 1222 View Post
Promise.
god i hope so
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Unread 11-10-2010, 07:22 AM   #24
Charles
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Quote:
Originally Posted by paul84043 View Post
I'm in Utah, 4300(ish) ft, so to me high elevation is 11000, to 14000 ft (Guardsmans pass). We have property at 8000 and I've never noticed any loss at all in any injected vehicle driven there, or anywhere up to the approx 10,500 that we encounter hunting.....I really wonder if there's not something else going on....
Well, there aren't any roads at 14,000 ft in Utah. We have one two of them in Colorado. Guardsman is 9,700 ft above sea-lvl and from what I can tell the speed limit there is somewhere around 45 mph. You're not going to notice power loss until you really get the brick moving. The energy required to move the vehicle exponentially increases above 55 MPH.

Fuel injection vs. carbureration has nothing to do with the power loss. Infact, fuel injection may make it worse. Since there is in the neighborhood of 30% less air at 11,000 ft (I'll stick with the math I calculated) the vehicle injects 30% less fuel to keep a good air fuel mixture. This is the whole reason turbo chargers were invented. Albeit on airplanes because of their power loss at altitude.

So, while you may not have noticed the power loss it is certainly there.
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Unread 11-10-2010, 03:54 PM   #25
Washi
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I NOTICED IT! Or not. After stepping out of my TJ w/3.07's, my Rubi feels like a rocket! Driving the passes here in Utah and Washington.
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Unread 11-10-2010, 04:20 PM   #26
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Originally Posted by cbloyer81 View Post
Well, there aren't any roads at 14,000 ft in Utah. We have one two of them in Colorado. Guardsman is 9,700 ft above sea-lvl and from what I can tell the speed limit there is somewhere around 45 mph. You're not going to notice power loss until you really get the brick moving. The energy required to move the vehicle exponentially increases above 55 MPH.

Fuel injection vs. carbureration has nothing to do with the power loss. Infact, fuel injection may make it worse. Since there is in the neighborhood of 30% less air at 11,000 ft (I'll stick with the math I calculated) the vehicle injects 30% less fuel to keep a good air fuel mixture. This is the whole reason turbo chargers were invented. Albeit on airplanes because of their power loss at altitude.

So, while you may not have noticed the power loss it is certainly there.
You're right, I whiffed it big time, I think one part of Guardsmans gets to 11,400. I've been over the dirt portion twice on a carbuereted street bike...no picnic.
I've still never personally suffered any noticeable loss of power at even 10,000 ft with an injected vehicle. Maybe just never got into the right circumstances...
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Unread 11-10-2010, 09:18 PM   #27
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I've never had power loss, mine been lacking since new. Am I missing something?
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Unread 11-10-2010, 09:35 PM   #28
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Turn overdrive off. Helps a little. I've gotten used to driving in the truck lane
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Unread 11-10-2010, 09:50 PM   #29
mthomp83
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Quote:
Originally Posted by rirrgang View Post
I've never had power loss, mine been lacking since new. Am I missing something?
touche my friend, touche
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Unread 11-11-2010, 10:36 AM   #30
jpacosta
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Mthomp im currently in ATL and been up alot to the National Forest where did you experience these problems?
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