Hi everyone I'm pretty new to the forum, and I need some help in deciding on a truck. The plan is to have a 600-650 whp daily driver. I'm caught between a job2 6.4 with about 70,000 miles and a job1 6.7 with 110,000 miles. Now my question is what exactly would it take to build a reliable 6.7 with that much power. I'm leaning towards the 6.7 because overall ride comfort and from my understanding you don't have to remove the cab to do turbo work? The 6.7 also gets better mpg? Also one last thing, delete for delete which engine seems to be the most reliable? Sorry for all the questions and if I posted in the wrong section. I'm still pretty green to the diesel world! Any help is appreciated, thanks!
650 horsepower 6.7?
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powerstrokinfirefighter
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I've never had a 6.7 but if I had a choice between a 6.4 or 6.7, I'd pick a 6.7 all day. Duel fuelers and a non vgt turbo setup is how I'd go
RedRice589
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You'll have to be careful with a 6.7 I'll wait until some of the guys like BigRPower who have modified 6.7's already. But dual fuelers and a 66mm non vgt turbo would be close to that dual lpfp and tuning it's there all day.
RedRice589
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I think it would survive moderately. But tuning would be crucial and I don't know personally and there aren't many at that power level on here yet....
Wayne
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6.4 and 6.7 have basically the same suspension. A stock 6.7 trans will take 650 a lot better than a stock 6.4 trans, but the 6.4 should take it for quite a while if you don't beat on it every time you get behind the wheel. 650 HP on a single non vgt turbo will have a lot more lag, and be a lot less drivable than stock configuration. You might be okay for a while if you live at low elevation, but don't plan on using your truck as a truck with a 66 at high elevation. 700 on a 6.4 is gonna be the most streetable and inexpensive in a reliable form of any truck I know but of course it can be done with either. It all comes down to $$$ and preference.
drunk on diesel
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6.4 with a set of upgraded turbos will get you what you're wanting
You'll spend more on the 6.7 IMO
You'll spend more on the 6.7 IMO
broncof250444
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We built a customer 2011 6.7,we did rods and all head work, dual fueler and a s366 billet on one dyno it did 645 ish hp and another 690 ish hp. Its his daily driver and pulls a landscape trailer with a bobcat on it weight in at just hair over 7600 lbs.
It has ran a 12.8@ 109mph with a crappy 60' of 2.1 and on that run it was a 8.45 on the 1/8th. Which we took it to a 1/8 mile track couple months back and was running 8.0-8.1's all night with a 1.8 60'. I haven't got to drive the truck much at the track and hes a new driver to the race track so hes still getting it down but regardless its a fun street truck and so far on the highway has only been pulled by a new Shelby other than that its cleaning everyone else.
It has ran a 12.8@ 109mph with a crappy 60' of 2.1 and on that run it was a 8.45 on the 1/8th. Which we took it to a 1/8 mile track couple months back and was running 8.0-8.1's all night with a 1.8 60'. I haven't got to drive the truck much at the track and hes a new driver to the race track so hes still getting it down but regardless its a fun street truck and so far on the highway has only been pulled by a new Shelby other than that its cleaning everyone else.
TRUBBS
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this is my plan.
6.7L with dual fuel and a 67fmw has worked wonders, spool up is awesome, and is easily a 700hp capable setup with custom tuning. A few of our customers are making in the mid to high 600's with really basic modifications, one being our turbo kit and an H&S dual fueler setup.
drunk on diesel
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on stock injectors? that's awful promising if so!
RedRice589
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I've had both and the only reasoning for 6.4 is head studs and a moderate foot will be a nice truck I love my 6.7 but that 650 number comes with a tag or a worry in the back of my mind.
ramonpowerstroker
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I'll do 6.7. The 6.4 is really an unstable platform with cracked pistons coming out if nowhere on stock form. The truth of the 6.7 being a new platiform is true but the 6.4 has already shown it's color. Also personal preference I have a 2008 f-250 6.4 that pushed 705 with just some head porting and a single s472. Was pushing 61 psi all day long and the bearing took a **** in the turbo. Fast foward 10000 miles and my reman hpfp from ford has gave out replace with a new one. Now I have a combustion cylinder 1 code and now the truck sits as is. At least with the 6.7 if your rods give out you'll know
bricewise
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I just put on my 68mm VGT turbo from Elite and fuelers from H&S. I dunno how much power I got yet, and still needs to be tuned, but this thing moves.
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Non vgt on a 6.7 is WAY faster spooling than a 6.4. A 66 would have no problem driving ok at altitude. Great thing is 95% of is don't !
Wayne
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:bowfast::bowfast::bowfast:
I keep forgetting about how much better the 6.7 heads flow, and how much less hot piping there is to pressurize. Personal experience goes a long way, and since you and a handful of others have had modified versions of both, you've got one on me. If I had a 6.7 daily driver, I'd be really tempted to throw on a modded duramax style vgt powermax with Elite's (or equivalent if there is one???) turbo conversion kit, and dual fuelers, then drive it until I break a rod. ...then go nuts with a built motor, of course.
drunk on diesel
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yup, 6.4 heads are pitiful
Frankly, it's amazing that they perform as well as they do! LOL
Frankly, it's amazing that they perform as well as they do! LOL
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These motors not cheap I would not want to throw a rod.
