5.4 power options???
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Senior User
Joined: Jun 2003
Posts: 292
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From: Las Vegas
5.4 power options???
I have a well running 01 Expy 4x4 with the 5.4 with 93k on it. I have re-geared it years ago to 4.10's due to my tire size, 285-75-16, and what a major improvement. The rpm's @ freeway speeds, (75mph) are around 2300/2400 or so. I live in Las Vegas, and in the summer time with the a/c running, this thing has no power, especially mid range around town. To make it move you really have to stick your foot in it. When it is cool outside, this thing comes to life. On the freeway, all is good.
What can i do to improve the power without going too extreme?
What can i do to improve the power without going too extreme?
Moderator
Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
Fuel/timing curves. Shift firmness at part throttle and WOT. You can eliminate the torque modulation between shifts(where the computer backs off of the timing and such to reduce power for smotther shifts) as well as make adjustments for gear ratio changes and tire size changes. It also is a good scanner that will read and reset codes as well as log live data. Check out www.motorhaven.com for good prices.
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
CAI, Exhaust, Tuner are the top three. Headers didn't seem to do much for my truck. I am using Sniper's Special Forces and I could tell a difference in a superchips tune verses my first try with Sniper's software. I have a dozen tunes I have made and I am running with stock diesels now.
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Freshman User
Joined: Sep 2007
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tuners are good and all, but you're gonna find by far the most helpfull thing for power AND mileage is to open up your breathing... a full exhaust, hi flow air filter/ Intake, Throttle body spacer, and a higher flowing throttle body (stock throttle bodies on our engines are CRAP). You'd be amazed at the difference you'll get from these things- good increase in power and by your setup I'm guessin' prolly at least a 2 mpg gain....
And just in case you feel like getting custom with a few things, look at parts for 2v (or is yours 3v?) lightning 5.4s... Oh yeah, look into an aftermarket ignition as well and you'll have the basics covered
And just in case you feel like getting custom with a few things, look at parts for 2v (or is yours 3v?) lightning 5.4s... Oh yeah, look into an aftermarket ignition as well and you'll have the basics covered
Last edited by 84ttb; Sep 29, 2007 at 11:09 PM.
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
I didn't like my TB spacer, it whistled and brought my mileage down. I have been to lazy to put my 75mm TB on so I can't say about it.
More than just the intake exhaust, it seems like the heads really need to be opened up with porting and a different set of cams.
More than just the intake exhaust, it seems like the heads really need to be opened up with porting and a different set of cams.
Elder User
Joined: Oct 2006
Posts: 835
Likes: 1
tuners are so overrated! you can change shift points, but they are WOT shift points. so it only changes them when your foots in it . and the shift firmness. its increases the line pressure in the lines and ive heard three to four confirmed cases of trannies pootering out. be careful what you wish for. wait three to five years for some new camshafts bud!
