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6.4L Performance Parts Discussion What has or has not worked for you?

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Old 11-15-2012, 03:09 PM
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To Trade or Not to Trade

think bout tradin my 08 in a 6.7.... What do you guys think? Are the 6.7s good motors. I love my 6.4 jus i wanted a 6.7 when i bout it and the itch has never gone away love the way the look and I'm not as concerned with goin fast any more
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Old 11-15-2012, 03:31 PM
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I would suggest checking out the 6.7 forum section on here.
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Old 11-15-2012, 03:33 PM
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Im doin that right now lol. tryin to find someone who has made the switch and what they think
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Old 11-15-2012, 11:50 PM
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IMO I would stick with the 6.4. My dad has the 6.7 and I have spent plenty of time behind the wheel of it. The fuel mileage sucks on it, my tuned 6.4 avgs 19 city/hwy his lucky if he is getting 13. The urea additive sucks to deal with and every one is having issues tuning the 6.7 so far. Btw his truck is bone stock. But if you don't care about mileage and just love the 6.7 then go for it, it is a great truck just few minor things to consider
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Old 11-16-2012, 12:21 AM
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Quote:
Originally Posted by Swetnutz View Post
think bout tradin my 08 in a 6.7.... What do you guys think? Are the 6.7s good motors. I love my 6.4 jus i wanted a 6.7 when i bout it and the itch has never gone away love the way the look and I'm not as concerned with goin fast any more
If your into modifications, stay with the 6.4

If you are going to stay stock the 6.7 is a better truck overall. Thats even after I have been dealing with the pump for the urea going out...

People who havn't ever had to use DEF thinks its a hassle, but in reality it's very simple. Depending on driving conditions, you have to put 5 gallons of DEF in every 4-6K miles. I top mine off at oil changes.

The 6.7's have the best creature comforts like Heated/cooled seats, a LCD in the dash, ect...
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Old 11-16-2012, 12:26 AM
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Originally Posted by F250Marine View Post
IMO I would stick with the 6.4. My dad has the 6.7 and I have spent plenty of time behind the wheel of it. The fuel mileage sucks on it, my tuned 6.4 avgs 19 city/hwy his lucky if he is getting 13. The urea additive sucks to deal with and every one is having issues tuning the 6.7 so far. Btw his truck is bone stock. But if you don't care about mileage and just love the 6.7 then go for it, it is a great truck just few minor things to consider
Something is wrong with your dads truck, or you are not telling us the whole story.

My 6.7 gets 16MPG commuting to work in the city and 20MPG empty on the freeway... STOCK! I don't drive like a grandma or a maniac. I drive like an average person.

Thats hand calculated, which has never been off more then 1MPG to the Lie-O-Meter.
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Old 11-16-2012, 07:52 AM
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Yea i have heard the 6.7's get pretty good mileage but i have not first hand experience. The 6.4 get horrible mileage stock.
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Old 11-16-2012, 08:19 AM
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Yeah, I'm going to say if your 6.7 isn't getting good MPG, you're the exception and not the norm.

My friend went from 6.4 to 6.7 (he was getting about 16-18 MPG hwy in his 6.4) and now gets around 18-21 hand-calc'd in his 6.7.

If you're keeping your 6.4 stock, get a 6.7 (if you want an new truck note). If you tune your 6.4, just wait until the next Super Duty update IMO.
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Old 11-16-2012, 09:17 AM
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Like has already been said. If you want a tuned truck, stay with the 6.4. If none of that matters to you, go with 6.7. You won't regret it. My 6.7 blows my 6.4 away comparing them stock. Tuned is a different story.

Sent from my DROID RAZR using AutoGuide App
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Old 11-16-2012, 10:26 AM
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Max hp and reliability--tuned 6.4.

Tolerable hp and reliability--6.7

Do not keep a 6.4 if u don't care about tuning or hp. Also if u live where you get emissions checks, 6.7 all day long.


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