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Discussion Starter · #1 ·
I have a 96 2500 automatic. I am wondering what modifications will improve my fuel mileage other than what I already have. I do a lot of towing.
I have searching this site but couldn't find much. I am thinking about 50 or 75 HP injectors and a governor spring kit. But is there anything else?
 

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egg between foot and pedal.
 

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small peice of wood works better because you can brak the egg if you want i also find that a sticker that says "remember this thing costs 175bucks to fill buddy" works well too although it does hurt the pride a bit hahah
 

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get free lockin hubs intake n straight pipe! programmers are good for mpg as long as you dont run it hard.
 

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sorry didnt read your sig. free lockin hubs are prob your best bet. that front axle soaks up at LEAST one mpg. other than that stick with all terrains, synthetic fluids in anything you can put em in, and stay light on the pedal. a bed cap would also help since you got reg cab but they get expensive. oh and that auto is soakin up lots of mpg too so when it burns up get a manual.
 

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Maybe its just me but I didn't read anything that said it was 4x4.........

2-stroke oil helps for some people. Lowering the truck if possible, or loosing weight also helps, along with skinny and light tires. The auto will be fine with a more efficiently build especially with a lock-up switch
 

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Bump the timing.

One thing with a lot of stuff is how much fuel do you have to save to pay for the mod (hub conversion for example) Timing is cheap/free and makes a big impact.
 

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Discussion Starter · #8 ·
Thanks for the suggestions. It is a 4x4 so i wont be lowering it. And i already have all-terrain tires.
 

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bumping the timing

how much wear and tear will bumping your timing do to the rest of your engine? sure it is beneficial for a couple more miles but whats the downside of it? I'm pretty new to these trucks so any info would be great. on a recent road trip i got around 18mpg hwy and the next tank was 16mpg strictly city driving. I was hoping to at least get in the low twenties for hwy driving. i try to drive it just under 2000 rpm, should i lay off a bit more? any suggestions?


1995 2500 extcab, 4x4 5 speed. 132,350 miles. just re did front wheel bearings(skf),all ball joints,rotors. aem brute force intake
 

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16* of timing wont hurt a thing. The timing was crap for emissions reasons so bumping it up a little will get some free power and a little better milage.

OP, dont waste money on the injectors for a stock truck. Get the GSK and work from there. Go with the 4k over the 3k as they will fuel a little harder down low. If you want a little more power you can grind or pull the fuel plate, another free mod, and gain a ton of power as the pump cn flow more fuel than the turbo can support. You just need to make sure you have an EGT gauge so you dont melt things down. Now the problem is that the stock auto can only support a slight power increase before it gets worked over. I am a stick guy so a little searching on beefing up the autos.
 

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how much wear and tear will bumping your timing do to the rest of your engine? sure it is beneficial for a couple more miles but whats the downside of it? I'm pretty new to these trucks so any info would be great. on a recent road trip i got around 18mpg hwy and the next tank was 16mpg strictly city driving. I was hoping to at least get in the low twenties for hwy driving. i try to drive it just under 2000 rpm, should i lay off a bit more? any suggestions?


1995 2500 extcab, 4x4 5 speed. 132,350 miles. just re did front wheel bearings(skf),all ball joints,rotors. aem brute force intake
My timing is @ 17 degrees. It's been that way for 200k miles or so. I have 3.54 gears & I am always in the low 20's on the highway. 24mpg was the best. I tow a 27' 5th wheel as well. :thumbsup:
 

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16* of timing wont hurt a thing. The timing was crap for emissions reasons so bumping it up a little will get some free power and a little better milage.

OP, dont waste money on the injectors for a stock truck. Get the GSK and work from there. Go with the 4k over the 3k as they will fuel a little harder down low. If you want a little more power you can grind or pull the fuel plate, another free mod, and gain a ton of power as the pump cn flow more fuel than the turbo can support. You just need to make sure you have an EGT gauge so you dont melt things down. Now the problem is that the stock auto can only support a slight power increase before it gets worked over. I am a stick guy so a little searching on beefing up the autos.[/QUOTE

So bumping the timing up to 16 should be sufficient? Will adding those
4k GSKs defeat the purpose of inceasing the timing? I plan on getting a pyro,water temp, and oil temp gauges installed before I do anything. The truck is going to have a 8000lb camper on the back and towing a heavy utility trailer, so If I can have a bit more power and still good mpg I'll be happy. Thanks for your input guys
 

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Timing and fueling are unrelated for the most part. Timing is when the fuel is injected into the cylander and fueling is the amount that can be injected. The gov springs effect the gov wieghts reaction time. By adding stiffer springs (gov springs) it lets the motor gain more RPMs and as a side effect you will gain a little more fueling across the RPM band. A stock auto wont take advantage of the extra RPM as it will shift but you will get the benefit of the extra fueling. So as a recap.
Bump timing.
Add gov springs (main thing as it makes the combo drive so much better).
Switch, grind, or remove fuel plate.
Whatever the auto needs to make it live.
 

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I get 26mpg hwy empty; this is what worked for me:
timing 16*
#10 fuel plate
3GSK (4GSK requires 60# valve springs if rev over @3,000rpm)
Uniroyal 275 16s
Built tranny and triple disc TC
manual lockup
I have a boost,pyro and tranny temp guages (tranny temp is a must if yer pullin)

I keep it a 62mph even on the interstate...

hope this helps
 
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Truck topper
 

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So bump timing to 16, add the 4k gsk, and get the fuel plate mod. Would a 4" exhaust be enough with this setup? Thanks again
 

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4" would work fine. No worries
 

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Can't remember if you have a built tranny from previous posts and this page takes sooooo long to load and look back. If not, get yourself a triple disk and upgraded tranny.
Don't forget not to rev over 3,000rpm without 60# valve springs.
 

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would I need the tranny temp gauge even for a manual? I planned on getting a pyro, water and oil temp gauges



1995 stock 2500 4x4 5 speed 132k miles
 
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