F150online Forums

F150online Forums (https://www.f150online.com/forums/)
-   2004 - 2008 F-150 (https://www.f150online.com/forums/2004-2008-f-150-80/)
-   -   heres a question? (https://www.f150online.com/forums/2004-2008-f-150/275586-heres-question.html)

fla.boy 02-28-2007 11:40 PM

heres a question?
 
my friend just got a 07 expedition with the 5.4,3.73gears and 2wheel drive. sweet ride! has the new six speed transmission! very smooooth ! we decide to have some fun! i followed him across a long bridge here in the area , late at night its very empty! as i followed he punched it! well i did what any red blooded american would do and punched it , well the best i could do is keep up! thats it ! i say that because i have a k&n and dual exhaust and a edge! set on level 3, i am runnig 3.73 gears also. one would think that i should be able to out run the expedition? any thoughts on this would be apreciated! p.s. my engine is the 5.4. so we have the same motor,the same rear gears. his transmission is 6speed. mine is 4speed. his curb weight is 5800lb.:coffee:

SilverScab 5.5 02-28-2007 11:52 PM

It is the trans, this is exactly what the F150 lacks to be competitive in the marketplace. A six speed has a much better gear spread and as a result it keeps the engine in the powerband much better than a 4 speed could. Plus being a brand new design I would imagine that the processor is probably faster and the trans is better able to react to driver commands. Putting this trans in the F150 should be a no brainer for Ford. Are you listening Ford

snowboarder7710 02-28-2007 11:59 PM

seriously...all in that trans. i cannot believe why in the world ford doesnt put that trans in the f150. hopefully by the next resdeign they will. my g/f had an 05 ranger with the 4.0 and the 5 speed auto and man that thing could haul ass..even with 3.55 gears and 32" tires.

fla.boy 02-28-2007 11:59 PM

yup ! i agree!

fla.boy 03-01-2007 12:02 AM

yeah but i dont understand why i could not outrun him? i am modded, he was stock?

SilverScab 5.5 03-01-2007 12:06 AM

6 speed trans has gear ratios that keep engine in it's powerband far better than our 4 speed in the F150. Your mods probably add roughly 20 to 30flywheel horsepower I would guess and the trans in the Expy can more than compensate for this. To put it another way, your engine had to lug more than the engine in the Expy because he has a gear ratio more correct for the situation than you did.

RYAN24 03-01-2007 12:07 AM


Originally Posted by fla.boy
yeah but i dont understand why i could not outrun him? i am modded, he was stock?

Your tire/wheel combo cant help either though.

fla.boy 03-01-2007 12:11 AM

ok! starting to make sense! thanks! in other words i need to call ford 1st thing in the morning and order a six speed transmission for my truck! lol

RYAN24 03-01-2007 12:21 AM

yeah pretty much :beers: or get a S/C or turbo either way your screwed money wise :rolleyes:

fla.boy 03-01-2007 12:28 AM

yup! just the usual! i done modding and trying to reinvent the wheel! im waiting for the new f150, with 6.2 motor! or that interceptor concept is starting to look pretty good.

RYAN24 03-01-2007 12:31 AM

im almost positive the new F150's will come with a 6-speed auto since the new tundra's come with it, plus the new 6.2 will be sweet im sure:banana:

fla.boy 03-01-2007 12:33 AM

yeah your right ! i was reading were the redisign would make the truck weight less. and that cant hurt!

wasachevyguy 03-01-2007 02:10 AM

check it out!


http://www.autoblog.com/2007/01/22/6...or-next-f-150/

ManualF150 03-01-2007 08:06 AM


Originally Posted by SilverScab 5.5
It is the trans, this is exactly what the F150 lacks to be competitive in the marketplace. A six speed has a much better gear spread and as a result it keeps the engine in the powerband much better than a 4 speed could. Plus being a brand new design I would imagine that the processor is probably faster and the trans is better able to react to driver commands. Putting this trans in the F150 should be a no brainer for Ford. Are you listening Ford

Also, why they are at it... give the F150 (all engines) a 6 speed manual! :rocker:

MGDfan 03-01-2007 08:36 AM

Hi.

A few things come to mind ...

Effective gear ratio (higher numerically) on the Expy - rear ratio x 6-speed 1st gear ratio. First on the F150 is taller and I think 2nd is too.

Quite possibly the 6-speed has a lower driveline loss than the 4-speed (which is approx ~30%).

Your 4X4 also has additional driveline losses over a 4x2.

And your rolling mass (wheels/rubber) is greater.

K&N nets you next to nothing in real terms, and depending on your dual exhaust config, you may actually be killing your low-end torque.

Also Expy's have far different PCM calibrations than F150's.

The 5.4 already has a broad torque curve so 'keeping it in the powerband' is less relevant as it would be for, say, a peaky ricer :).

Put just a custom tuner on that Expy & he will simply run away from you :lol:

Better not tell him that! LOL!


All times are GMT -4. The time now is 07:24 PM.


© 2024 MH Sub I, LLC dba Internet Brands