Supin a 5.4L
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Senior User
Joined: May 2009
Posts: 132
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From: Sandy, Utah
Supin a 5.4L
Help! Need more pep out of my 5.4l with 3.73 axle any suggestions? I'm use to the 6.0 Chevy's which are race car quick what is the difference other than slight HP favoring the Chevy's? Is the throttle delay system the culprit? Or am I feelin like Benedict Arnold goin with Ford?
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Senior User
Joined: May 2009
Posts: 132
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From: Sandy, Utah
Sorry for the bone head questions gents. I've recently converted to Ford and am tryin to learn everything I can about this truck. Any response would be appreciated even if it is to direct to a a prior post. I'm not havin much luck with the search feature
Postmaster
Joined: Jan 2009
Posts: 3,339
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From: Smithers, BC, Canada
I put a SCT tunner from 5 Star Tunning on the truck on my sig and it feels like a completly different truck.
5 Star Tuning | Custom Dynomemeter Chassis Tuning Products and Services
PS, I have 3.73s also.
5 Star Tuning | Custom Dynomemeter Chassis Tuning Products and Services
PS, I have 3.73s also.
You Keep What You Kill
Joined: Dec 2006
Posts: 4,902
Likes: 2
From: Huntersville, NC
There is a lengthy thread on this issue (see link below). I highly recommend contacting Mike at 5 Star Tuning to see what he can do for you with an SCT tuner. I also recommend getting the custom tunes and they only a few dollars more. My SCT Livewire really woke up my 5.4L!
https://www.ford-trucks.com/forums/8...-for-5-4l.html
https://www.ford-trucks.com/forums/8...-for-5-4l.html
Post Fiend
Joined: May 2006
Posts: 10,007
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From: Central Florida
The chevy will have a little more power because of the added displacement. Your gears are not a great choice for off line power, 3.73 was the highest available. My ratio comes to 4.30 with stock tires and it's barely quick. You can boost the hp/tq all you want, but until you put it to the ground stronger you will not see a big increase.
I would suggest a cold air intake, exhaust, tune and gears. Get the air in and out, then give it a little more fuel and put all of that down with a lower final drive ratio.
I would suggest a cold air intake, exhaust, tune and gears. Get the air in and out, then give it a little more fuel and put all of that down with a lower final drive ratio.
You Keep What You Kill
Joined: Dec 2006
Posts: 4,902
Likes: 2
From: Huntersville, NC
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Senior User
Joined: May 2009
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From: Sandy, Utah
Muchas Gracias, I have enough peso's at the moment to throw on a Magnaflow setup or a programmer which would be the better way to go?
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Post Fiend
Joined: May 2006
Posts: 10,007
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From: Central Florida
Of those choices, I'd say tune. However if you go with one of the semi-customs make a plan of the mods your going to do so they will be supported without having to order new ones every time.
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Senior User
Joined: May 2009
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From: Sandy, Utah
Sorry I'm new to this stuff, so if I do plan on adding an exhaust sytem later order the tune with that? If the tune wakes it up enough I would prob drop the plan of the exhaust. I had a Magnaflow on a previous F 250 and a Chevy HD and after awhile I tired of the noise. It would seem the fellers here are high on the SCT Tune? Is there other tunes to consider or is this one flat out the best one for my situation. 05 F250 Superduty ext cab short 5.4L 3.73. Also after the tune do I need to run high octane fuel? And does mpg suffer? Boy I feel like a dumba$$ with all these questions
Postmaster
Joined: Jan 2009
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From: Smithers, BC, Canada
Sorry I'm new to this stuff, so if I do plan on adding an exhaust sytem later order the tune with that? If the tune wakes it up enough I would prob drop the plan of the exhaust. I had a Magnaflow on a previous F 250 and a Chevy HD and after awhile I tired of the noise. It would seem the fellers here are high on the SCT Tune? Is there other tunes to consider or is this one flat out the best one for my situation. 05 F250 Superduty ext cab short 5.4L 3.73. Also after the tune do I need to run high octane fuel? And does mpg suffer? Boy I feel like a dumba$$ with all these questions
87octane economy tune 1-2mpg mileage improvement
87octane power tune no change in mileage
93octane power tune 1mpg loss
I run 87 power most of the time, use eco when driving long distances for work, and use 93 when going long distances with my horse trailer or full loads of hay.
Also in the SCT X3, there is a range of user selectable parameters where you can change things yourself.
Hope this helps,
JE
Postmaster
Joined: Oct 2006
Posts: 4,171
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From: SE Texas
It'll make the truck get better mileage due to the MUCH lighter wallet in your back pocket.
You couldn't give me a livewire-they're a big steaming pile of poo.
JL
You couldn't give me a livewire-they're a big steaming pile of poo.
JL