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Old 11-26-2014, 10:27 AM   #1
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14 gt rear end ratio

hey i have a manual trans u guys think i should put 3.73 gears since my rear end is out or should i leave the stock ones which are 3.31s i believe
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Old 11-26-2014, 10:50 AM   #2
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Don't you think it's a good idea to see what you have first? There's a tag on the rear that tells you the gear ratio.
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Old 11-26-2014, 10:57 AM   #3
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true lol but yah theyre 3.31
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Old 11-26-2014, 11:00 AM   #4
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Do it! Best bang for your buck performance wise in my opinion. Trade miles per gallon for smiles per gallon.

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Old 11-26-2014, 11:29 AM   #5
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Yes it'll feel like you added 20-30hp or so. Best bang for the buck.

First thru third pulls hard but fourth could use a shorter axle gear like a 3.90.

That being said a 3.73 is probably the best all around gear to have. You will lose around 2-3mpg vs 3.31 though.


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Old 11-26-2014, 12:27 PM   #6
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I rock the 4.10s

i'll never go back
too much fun feeling like i'm steve mcqueen
revving around town

remember tho your speedo will need to be corrected via use of a tuner or the dealer ?
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Old 11-26-2014, 12:42 PM   #7
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sounds good thanks for the feedback ill be going with the 3.73s
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Old 11-26-2014, 01:02 PM   #8
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There are a lot of guys with 3.73's that wish they had 3.31's so that's something to keep in mind.
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Old 11-26-2014, 01:21 PM   #9
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hmm y do u say that
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Old 11-26-2014, 02:17 PM   #10
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When the weather is cold I can only half throttle first and 3/4 throttle second or I lose traction. Even DRs in cold weather won't do much good.

So in certain conditions a 3.31 gear is preferable.

That and an extra tank of gas every two weeks at about $50 x 26 weeks = $1300 extra gas cost per year or so.

If I were to do it all over again I would somehow figure how to add another 30whp for about 450whp total and keep the 3.31. But not much outside of cams will be adding any power especially at cost effective prices.


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Old 11-26-2014, 02:19 PM   #11
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E85. Best mod for the money hands down. Can't beat it

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Old 11-26-2014, 02:42 PM   #12
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E85? You run that 24/7?

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Old 11-26-2014, 02:43 PM   #13
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E85? You run that 24/7?

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As long as your car is set up for it, it is just like any other fuel. But better than pretty much all normal pump gas.


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Old 11-26-2014, 02:59 PM   #14
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E85? You run that 24/7?

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Yes.
Why wouldn't i

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Old 11-26-2014, 03:40 PM   #15
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At the risk of getting made fun of or having to hear *****ty replies I'm gonna go do a search and read up on it. Obviously it's something different than what I thought it was. Hahaha. Carry on. I'll see my way out the back door...

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Old 11-26-2014, 03:59 PM   #16
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At the risk of getting made fun of or having to hear *****ty replies I'm gonna go do a search and read up on it. Obviously it's something different than what I thought it was. Hahaha. Carry on. I'll see my way out the back door...

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Nobody is going to make fun of you.
It was serious question.

E85 is 105 octane.

I gained 26hp and 22tq.
We also got a little crazy with the timing. One of the perks of a dyno tune vs a data logged email tune.

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Old 11-26-2014, 09:37 PM   #17
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Haha. Good to know. How in the heIl do you find 105 octane? I've never seen that anywhere. Ballpark what's the price per gallon you've been paying for that?

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Old 11-29-2014, 11:30 PM   #18
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Haha. Good to know. How in the heIl do you find 105 octane? I've never seen that anywhere. Ballpark what's the price per gallon you've been paying for that?

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E85 is a 105 octane. And it's $2.01 right now by me

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Old 11-30-2014, 12:33 AM   #19
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How in the hell is it that much less expensive than normal fuel if it's so much better? If that's the price for it everywhere than that sounds like a pretty badass deal to me. What would I need for that? Just a tune or would I have to upgrade my fuel system?

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Old 11-30-2014, 12:36 AM   #20
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You will need a tune and 47lb injectors,
Also makes your gas mileage go down.

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Old 11-30-2014, 01:17 AM   #21
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Also makes your gas mileage go down.

This ^^

It looks cost effective, but it flows more. So the cost is offset in your mpg decrease. Generally dollar for mile you get a bit less with E85 than normal gas.... But if you want the 105 octane rating then mpg won't matter to you.



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Old 11-30-2014, 01:23 AM   #22
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Hmmm. Something to think about. I know for sure that due to the extra power my right foot will definitely be making my gas mileage go down. Same thing happened when I bought some axlebacks..
Thanks for the help. I really do appreciate it. I haven't convinced myself to void the factory warranties just yet. Plus I'm outta commission for about 6 months because of my spine. But once I get better and grow the balls I need to to say f the warranty then I'll definitely look into the E85 swap.

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Old 11-30-2014, 01:42 AM   #23
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It's easy on the new mustangs to run it. On my 2001 if I were to convert over I'd need a crap ton of stuff done to the fuel system.


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Old 11-30-2014, 01:56 AM   #24
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On a scale of 1 to 10 - 1 being as easy as installing a CAI - how hard is it to install 3.73 in the 14? This is something I'm seriously entertaining. Using something like the 3.73 Ford Racing kit at AM?
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Old 11-30-2014, 08:56 AM   #25
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You're planning on doing the gears yourself? If you have to ask that question on how hard the install is then for you I'd say 10. In your case, I'd pay the 150-200 to have a shop professionally do it. That way you can take it back to them to have them fix it if it's not perfect.

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