mileage and performance
Thread Starter
|
Senior User
Joined: Feb 2007
Posts: 207
Likes: 0
mileage and performance
i have a 1996 f150 302 auto 3.55s and 32s and im wondering what u guys think headers and full exhaust, 1.7 rockers and the 4.9 or 460 air intake would add on mileage and power wise. i get 12 mpg now which aint bad but i would like a little more
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
12 MPG? Under what conditions? Sounds a little low to me. The 32's and 3.55 gearing are not helping you any.
Need to ask when was the last time you did plugs/wires/cap/rotor and filters? Never overlook the easy items!
Need to ask when was the last time you did plugs/wires/cap/rotor and filters? Never overlook the easy items!
Thread Starter
|
Senior User
Joined: Feb 2007
Posts: 207
Likes: 0
The plugs, wires, filters have all been changed, I kno it needs a o2 sensor and that's probably the main reason for 12 mpg but I want dual exhaust and figured I would put new ones in when I had that done. Will it help mileage any to do the modifications I asked about, I already have the cats gutted and with a glass pack but its single til it get o the rear axle. I want to try to help mileage and get better performance. Any suggestion?
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
Dual exhaust will probably not help you, IMHO. Gapping the plugs to 0.55 and bumping the timing to 12-14-16 is a proven winner. You stated you already gutted the converters so replacing the factory y-pipe/converter is already addressed. Perhaps you have a "heavy" foot? Beyond that gears are probably in your future....
Thread Starter
|
Senior User
Joined: Feb 2007
Posts: 207
Likes: 0
My foot probably is a little heavier than it neesd to be, I know my timing is at 10 so I might try moving it a couple degrees at a time and see how it does, how are the manifolds on these truck, would it be worth it to get headers and what about 1.7 rockers I've heard people talk about them, will they help enough to make it worth it
Fleet Mechanic
Joined: Aug 2005
Posts: 1,462
Likes: 74
From: Hartford, AL
My foot probably is a little heavier than it neesd to be, I know my timing is at 10 so I might try moving it a couple degrees at a time and see how it does, how are the manifolds on these truck, would it be worth it to get headers and what about 1.7 rockers I've heard people talk about them, will they help enough to make it worth it
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Has the speedo been recalibrated for those tires? If not start with that since it's free, and then start saving up for 4.10's.
Trending Topics
Thread Starter
|
Senior User
Joined: Feb 2007
Posts: 207
Likes: 0
The speedo hasn't been changed since I got the truck and it had 235s on it then but my gps shows its only of by 2 or 3 mph, how do I recalibrate it
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
Thread
Thread Starter
Forum
Replies
Last Post
fordmarshall111
1987 - 1996 F150 & Larger F-Series Trucks
9
Dec 19, 2003 02:47 AM
swampystumps
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
4
Mar 3, 2002 09:12 PM