first diesel

[jasonsram]

im looking for my first diesel truck. im up in the air between an 06-07 lbz duramax and a 6.7 powerstroke ford. the thing i hear about the ford is, its got one of the strongest transmissions in the business straight from the factory. so im wondering what luck have you guys had in running serious power on the stock transmission. how much of a tune can it take? are there any other upgrades that need to be made. my goal is pretty reasonable for now, to run 13.9s, probably on a 2wd f250. how much of a tune is needed for this, and how much can the tranny take before needing to upgrade it?

[6.0f250firstcar]

Just a question, why are you comparing the 6.7 to an LBZ Duramax? Maybe you meant 6.4??


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[jasonsram]

im considering a gm, and im considering a ford. both for different reasons. i came here to ask about the ford, namely how strong the stock tranny is, and what steps are needed to safely and reliably add, oh say, 200 hp.

[6.0f250firstcar]

Well ford trannys are very durable and will support 200 hp added on easily. If you're looking strictly for speed, I'd go with the 6.4 mainly because deleted with a tune and intake, those trucks will hit 600 hp.


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[ucpa111]

If your goal is a racer...buy a 6.4

Plenty of folks can attest to that. I love my 6.7...wouldn't trade it for a 6.4.

Tranny is solid in 6.7. Boy...what if they put the 6 speed in the 6.4 frame...WOW.

[jcain]

my 3.31 6.7 deleted, H&S on hot hangs well with my buddys 3.73 6.4 deleted, H&S on "250hp" tune, he starts pulling away but it's nothing drastic. we ran the 300 tune for a few pulls but not against each other, and thats a bad mofo. he only runs the 250 though, scared of the 300.

[jasonsram]

hmmm... thats what i dont get. if you can run a hotter tune in the 6.7, why is the 6.4 the one to go with? i guess there is more than one factor for me, so this just opened up a few questions.

which truck rides nicer, the generation with the 6.7 or the 6.4?

is the 6.4 a 5 speed auto? i dont mind a 5 speed, but i dont want to go back to a 4 speed for sure. i need a good passing gear. nothing like dropping into third to pass someone. ok, real question is, how much hp with a 6.4 tranny hold, vs how much will a 6.7 hold?

a nice plush (relative for a pickup truck) ride is very important to me, but so is power. help me figure out my next truck. thanks

[jcain]

6.7 tunes are not able to make the power the 6.4s do, plain and simple. out of turbo, and out of rods

[jasonsram]

so youre saying the 6.4 engine rods are stronger, and can take more power, and the turbo can flow more air, thereby supporting more hp. good to know. can the trans take it tho? how does it stack up to the 6 speed allison (2006 and up) or the old cummins 5.9s tranny?

[Robertc82]

Can't tell you about the Allison but cummins tranny...48RE=crap! 68RE=just a little better crap. Fords transmission is way better.


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