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Old 02-17-2012, 10:07 PM   #41
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Originally Posted by ColtsTRD View Post
Hey Chris, this may be a dumb question but I heard there is a difference in sizes when it come to Tacomas pumpkins. I heard that because I have a locker I have to get a ring and pinion for a 8" and all others can use the 8.4...I'm not sure what this means
Chris knows all...
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Old 02-17-2012, 10:08 PM   #42
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Originally Posted by Volcom21 View Post
I was told if i went with 4.10 gears with 33's that my top speed would be 85 mph. Is that true? Thanks
You drive around chino right?? I've seen you're truck alot lately...I'm regeared if you wanna see how 4:56s run...I regeared about a year ago. let me know...
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Old 02-17-2012, 10:08 PM   #43
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Originally Posted by Cortland View Post
Chris knows all...
I agree
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Old 02-17-2012, 10:21 PM   #44
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Originally Posted by Cortland View Post
Any recommendations of where to go in Phoenix? Also, with 255's or 285's and 4.10's do you think my MPGs will go up from what I'm getting with 265's and stock 3.73's?
I dont think your gonna get better mpg than you would stock.

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Originally Posted by ColtsTRD View Post
Hey Chris, this may be a dumb question but I heard there is a difference in sizes when it come to a Tacomas pumpkins. I heard that because I have a locker I have to get a ring and pinion for a 8" and all others can use the 8.4...I'm not sure what this means

Help
Yes. The locker has an 8" housing, while the TRD SPorts, and others have an 8.4". IIRC, THe gears are all 8" though.
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Old 02-17-2012, 10:25 PM   #45
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Quote:
Originally Posted by chris4x4 View Post
I dont think your gonna get better mpg than you would stock.


Yes. The locker has an 8" housing, while the TRD SPorts, and others have an 8.4". IIRC, THe gears are all 8" though.
so 4.10s from a 4cyl WILL fit my truck no issue? Should I even bother regearing when I get 285s?
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Old 02-17-2012, 10:27 PM   #46
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Originally Posted by chris4x4 View Post
I dont think your gonna get better mpg.
do you think that it will be worse than stock though?
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Old 02-17-2012, 10:30 PM   #47
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Quote:
Originally Posted by chris4x4 View Post
The engine is doing less work to spiin the larger tires. Less work = better mpg. Larger tires add much more rotational mass to the drive train. Re gearing can give the engine more leverage in which to turn the tires. More leverage = less work= better mpg. I dont think I was able to do any accurate highway testing to be able to draw an accurate conclusion as to a gain.
I see the argument but that goes against what I've seen.

I've tried many times with a scangauge to compare mpg using 4th and 5th gear, and in every situation 5th gear shows better mpg even if at lugging speed. On flat ground or climbing a hill I never see an increase in mpg with higher rpm and more leverage as you describe. Driving at near lugging speed is essentially the same as bigger tires and no regear.

All us hypermilers keep it low rpm short shifting below 2000 rpm with no leverage, but better results.

This is a topic that I haven't found any solid testing done after much research.
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Old 02-17-2012, 10:40 PM   #48
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Originally Posted by Jerez View Post
You drive around chino right?? I've seen you're truck alot lately...I'm regeared if you wanna see how 4:56s run...I regeared about a year ago. let me know...


Yeah i think i have seen your truck a lot this week. That would be cool if i could see how it runs. What would you say you top out at? And if your still doing the led speedometers, id be interested in that too. Thanks
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Old 02-17-2012, 10:49 PM   #49
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Originally Posted by Volcom21 View Post
Yeah i think i have seen your truck a lot this week. That would be cool if i could see how it runs. What would you say you top out at? And if your still doing the led speedometers, id be interested in that too. Thanks
Yup, you have your custom CA plates "VOLCOMA" right??
Let me know, and yes I still do the swaps...send me a pm n we can meet up.
I saw you yesterday at Chino high when I went to pick up my bro
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Old 02-17-2012, 11:44 PM   #50
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If i went back to even getting to close to the mpg's i did when i was stock that would be fine. Anything better than what i get now would be good. I just wanted to make sure i could at least get to 90-100 mph top speed
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Old 02-18-2012, 12:06 AM   #51
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Quote:
Originally Posted by Cortland View Post
I have 4.10's waiting to be installed. How much did it help your MPGs?
I haven't even burned up 1 whole tank of gas yet! I just got them last week. I can tell you that I drove around in the woods all day and only burned 1/2 tank. It seems to be better.... (I know it is.) I will PM you once I do a mileage check OK?

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Originally Posted by ColtsTRD View Post
so 4.10s from a 4cyl WILL fit my truck no issue? Should I even bother regearing when I get 285s?
That's what I did! Did you check out my thread I linked in post 7?

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Originally Posted by Volcom21 View Post
If i went back to even getting to close to the mpg's i did when i was stock that would be fine. Anything better than what i get now would be good. I just wanted to make sure i could at least get to 90-100 mph top speed
My truck could do 100mph easily. I have to double check, but at 60MPH I am only at 2000rpm or so. It dosen't seem to me like it is winding up bad on the highway at all. It's perfect, and the power aint bad either!

It's pretty nice not having to mash down on the gas, and force it to drop down a gear, to make it go anymore!

Again, I am running 4:10's and 255/85/16's in my 2006 4.0L 4X4.
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Old 02-18-2012, 12:23 AM   #52
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Originally Posted by commando View Post
I haven't even burned up 1 whole tank of gas yet! I just got them last week. I can tell you that I drove around in the woods all day and only burned 1/2 tank. It seems to be better.... (I know it is.) I will PM you once I do a mileage check OK?



That's what I did! Did you check out my thread I linked in post 7?



My truck could do 100mph easily. I have to double check, but at 60MPH I am only at 2000rpm or so. It dosen't seem to me like it is winding up bad on the highway at all. It's perfect, and the power aint bad either!

It's pretty nice not having to mash down on the gas, and force it to drop down a gear, to make it go anymore!

Again, I am running 4:10's and 255/85/16's in my 2006 4.0L 4X4.
Thats basically what i was looking for some extra acceleration power and not getting horrible gas milage on the freeway, thanks
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Old 02-18-2012, 06:39 AM   #53
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Quote:
Originally Posted by ColtsTRD View Post
so 4.10s from a 4cyl WILL fit my truck no issue? Should I even bother regearing when I get 285s?
They should.
Quote:
Originally Posted by Cortland View Post
do you think that it will be worse than stock though?
It shouldnt be.
Quote:
Originally Posted by worthywads View Post
I see the argument but that goes against what I've seen.

I've tried many times with a scangauge to compare mpg using 4th and 5th gear, and in every situation 5th gear shows better mpg even if at lugging speed. On flat ground or climbing a hill I never see an increase in mpg with higher rpm and more leverage as you describe. Driving at near lugging speed is essentially the same as bigger tires and no regear.

All us hypermilers keep it low rpm short shifting below 2000 rpm with no leverage, but better results.

This is a topic that I haven't found any solid testing done after much research.
Are you running larger tires? The method you are useing as a "test" is flawed, as you are already geared optimally from the factory, for best mpg/performance. Adding larger tires throws that all out of whack, and you become too "Under geared", and the engine works too hard at trying to spin the tires, along with moving the truck. Read the link I posted.
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Old 02-18-2012, 10:02 AM   #54
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Quote:
Originally Posted by chris4x4 View Post
Are you running larger tires? The method you are useing as a "test" is flawed, as you are already geared optimally from the factory, for best mpg/performance. Adding larger tires throws that all out of whack, and you become too "Under geared", and the engine works too hard at trying to spin the tires, along with moving the truck. Read the link I posted.
Is this what you are directing me too?

"Your truck comes from the factory with the optimum axle gear ratio to work with the truck's engine, transmission, and stock tire combination as well as provide a good balance between acceleration and fuel economy. When taller tires are installed on a truck but the axle ratios stay the same; the effective gear ratio is reduced. This means the engine is forced to operate below its power band, and performance and fuel economy suffer as a result. In order to restore the effective gear ratio (and the truck's performance), you'll need to have the axle gears swapped to lower (numerically higher) ratios."

I'm intentionally staying below the powerband of my engine with excellent mpg, but this says I'm wrong. It doesn't say my test method is flawed. It does speculate that every car manufacturer is optimized every engine/tire/gear combination which we know isn't true. My wife's Element spins 4000 rpm at 80, that is retarded Honda optimizing.

This also from your link would seem to agree with my take.

"If you're looking for a ratio that will give better fuel economy for highway driving at the expense of some acceleration and overall performance, choose a ratio in the yellow shaded area. If you're looking for a ratio that will improve acceleration and towing power at the expense of some fuel economy, choose a ratio in the blue shaded area."
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Old 02-18-2012, 10:34 AM   #55
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Dude it does not work the same using a fixed tire size and shifting gears. Bigger tires require harder accelerator pressing to get moving at the same rate. You regear you gain city stop and go milage... but have higher rpm on freeway at fixed speed. Changing your gear from 4th to 5th in no way simulates this. My buddy has done dozens of gear swaps on Tacomas and Jeeps and always gets better mileage. Am I supposed to believe his and everyone else's real world experience or your imagination based off a flawed experiment?

Reagearing will boost your milage in the city. He also told me I would get a similar gain in city milage with 4.56 in the city but hurt highway milage substantially. The negative is the requirement for a new carrier if you go 4.11 in the front diff. Ther is no carrier break for rear gears. If you get a ARB up front it IS a new csrriet so not a problem... then there is the shortage of 4.11 gear availability.
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Old 02-18-2012, 12:07 PM   #56
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Quote:
Originally Posted by DevL View Post
Dude it does not work the same using a fixed tire size and shifting gears. Bigger tires require harder accelerator pressing to get moving at the same rate. You regear you gain city stop and go milage... but have higher rpm on freeway at fixed speed. Changing your gear from 4th to 5th in no way simulates this. My buddy has done dozens of gear swaps on Tacomas and Jeeps and always gets better mileage. Am I supposed to believe his and everyone else's real world experience or your imagination based off a flawed experiment?

Reagearing will boost your milage in the city. He also told me I would get a similar gain in city milage with 4.56 in the city but hurt highway milage substantially. The negative is the requirement for a new carrier if you go 4.11 in the front diff. Ther is no carrier break for rear gears. If you get a ARB up front it IS a new csrriet so not a problem... then there is the shortage of 4.11 gear availability.
Thanks for joining the conversation.

What you say may well be true for many applications, maybe with automatics it is different than manuals where I can pick the gearing and not be forced into some downshifting that big tires might cause.

With the V6 and poorly chosen OD 6th gear I would guess that with bigger tires you will gain back the mpg that you would have gotten if Toyota decided on a better OD like on the auto.

Anyone out there with V6 Stick find their mpg increased with bigger tires after factoring for tire size change? The extra weight and rolling resistance may simply offset the lower rpm, but I don't see how regearing to get back to a poor OD ratio for highway speeds will ever help mpg in that example.

If toyota optimized like we are supposed to believe the 6-speed would have the same OD gearing as the auto and there wouldn't be a 2mpg EPA hit with the stick.
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Old 02-18-2012, 12:11 PM   #57
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Anyone running 33's with 4.10's and V6 - Automatic?
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Old 02-18-2012, 02:02 PM   #58
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Me. See link in post #7.
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Old 02-18-2012, 02:11 PM   #59
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Me. See link in post #7.
How is that workin out for you? Happy with it?
MPG?
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Old 02-18-2012, 02:15 PM   #60
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Very, very happy. I am still on my first tank of gas, just got them last week!

I will try and get some MPG#'s up soon.

The power you get back is noticeable, and much mo' better.
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