Hey everyone, you've all I'm sure seen my posts about getting a newer truck, well I've decided I'm gonna keep mine and work on it, as even the newer trucks don't seem to get that much better milage! My only real option was a 4.3 or 5L in a shortbox, which while cool, I think its cheaper to keep my blazer!

Stats-
1994 Chevy FullSize Blazer
350 TBI
4x4
295,000 kms
Z71
265/75/R16

Baseline MPG- about 12.5 mpg (winter) in the summer I get about 14 mpg

I'm gonna use here to record my progress, and so y'all can comment on and give suggestions.

So far I have just started to drive sensibly, no hard acceleration and keeping it at 55mph.
I replaced the gas cap
I set all tire pressures even at 45psi (tires seem to sag below that)

Plans-
Tune Up
New O2 sensor (prob heated)
Synthetic Fluids
Fuel Filter
Electric Fans
Grounding Kit (I have a friend who swears be this, putting heavy duty grounds from batt to engine to tran to frame)
Air Filter Kit (K&N Style or home made dual snorkel and high flow filter)
Seafoam


I'll keep this updated each tank, my goal is 18mpg during the summer! :gi:

Heres a picture

Nice looking ride, Sharp!! Are the mileages your using all city, all hiway, or a combo of both?? My guess is that when you trade your logging boots for ballarina slippers/w a sticker in the bottom on the throttle, and drop your speed to 60 or less, that will surprise you on mileage increase. We've done that on my wife's '04 F--- Expedition 5.4 and it gained an honest 2mpg. It's running 18-19 Hiway pretty regular. Drop a 8300# travel trailer behind it, and it falls to 7 or less. Of course, that's not a fair comparison.
Interesting experiment, keep us posted.
Cayoterun

Thanks! I like her. Usually the white letter on the tires shows up nicer, and the push bar is gettin some big lights soon :D

This would be a bit of a combo. Its 42 kms to school each way, 5 days a week, which is mostly 55mph and some traffic lights. My girlfriend is about the same drive away, little more city tho.

Couple of catches that throw the winter milage off. I let my truck warm up about 10 mins each morning before I go to school (5-7 times per tank) which is over an hour of idling each tank. So I will pick up some awesome numbers come summer.

I've been driving like a granny for about a week and a half now... :but: I hate it but its safer, less stressful (I give myself more time to get places) and really only adds a few mins to each trip. Oh and no cops to worry about :D

I don't think 18mpg in the summer is out of the question at all. Oh, and this is all bolt on kinda stuff, no internal mods... yet. ;)

We've used 3 5.4's since '97, and some relatives have used 350 vortec's and their Chevys will easily beat our F---'s 2-3mpg in identical conditions.
Granny driving and less stress: Even tho you hate it, it might improve your chances of still be sleeping with a granny 40 yrs from now, and you'll probably be looking in your rear view mirror less and out the windshield more. It gets easier as you get closer to 70---(years old, that is) and yes, I used to be a "2-speed" driver---parked or full throttle.
Keep us posted
Cayoterun

I have tried the 55 MPH thing and it has cleaned my attitude pipes out. I hated every mile of it. I took on the thought of doing the truck to fit my driving. I have a 91 Silverado SWB, with a 5.7 litre motor and a 700R4 tranny and 3.42 gears. I run a smaller tire than what was sold on it and that in the long run is probably hurting my mileage on the highway, BUT it helps in other things though, it allows for a better acceleration and mixed driving is better. When I bought the truck 6 years ago, it had 67,000 miiles on it and the owner claimed 20 MPG. However, from the first day of owning it, I never achieved that mileage, I got about 16 MPG average. The first thing that I did was to get rid of the restrictive air intake equipment. I went "Old School" and just installed a chrome 14" X $" K&N air filter on top of the TBI. It now looks just like a carbureated motor. That helped a lot. Next, I added a set of shorty headers (The long tube ones would have been better) and the exhaust is a free flowing 3" into the muffler and has dual 2 1/2" outlets. I then put in a Hypertech chip and a 180 degree T/stat. There was some defintie gain in MPG, I now averaged 17.5 to 18 MPG. I then added an "Airaide" TBI spacer, this definitely helped the low end torque and overall performance is smoother and I am now over 18 MPG. The next thing installed was a MSD 6AL multi-spark unit to get all of the energy out of every ounce of fuel, along with the 8 MM spark plug wires (very low resistance and good for HP increases) and a MSD coil for higher energy firing. This definitely made a difference in my mind. The truck is averaging 19 MPG on the highway. Last year I took off the factory fan and put on a dual 11" fan set and gained an average of 1 more MPG, so that is a good thing. I run my truck between 2000 and 2500 RPM while I am driving and it seems to work the best there. I put aheavy duty tranny kit, along with a new Torque converter, in my transmission and it tightened up the performance there, less slippage.

I do run a friciton reducer called "Energy Release" in my engines. Some call it a "Snake Oil" but it is easing my mind on wear and tear. My rear end has a posi-unit with Amsoil gear lube in it and that keeps that resistance down also.

This all sounds surrealistic, but I can fuel up the truck and drive across country and get 20 to 21 MPG at 70 MPH on regular fuel (W/O the A/C on) and enjoy my trip. I now have 212,000 miles on my truck and gaining every day, since I drive about 21,000 miles or more a year.

Awesome post!

not sure on the weather in Kansas.... but how does it do in the colder weather, for start up and such? I would like to do the open element filter than the airtube kinda kit, but I have the 2 bolt tbi. The arguement is your setup sucks hot air, what do you think of it? My other idea is a twin snorkel like a camaro.

I don't have exhaust in my original list there, but it will get done eventually. right now I have manifolds with single exhaust, freeflowing muffler and about 3 inch pipe most the way back (slight rumble, its kinda cool) but not sure how well it flows. I could easily do long tubes and a decent exhaust.

Is your truck 2 or 4wd?

The ElectricFan setup... Very interested in this one. Where did you get your fans and how did you rig em up? Where do you run the switch for a thermostat? Did you shroud them?

Great lookin underhood btw!

Thanks

I have no problems with startup in the winter. It functions just like it was designed. As for running in hot air, the only time that I see any loss is when the temps are around 100 degrees in the middle of the summer. What I see then, is a little less response on acceleration. The fuel mileage is slightly better in the warm weather than on a really cold day (temps around 10 degrees and wind chills at 0 degrees) (Yes, they do get there in Kansas winters).
I am not sure about your TBI unit and the two bolts. Mine was only one bolt to hold the air cleaner and the replacement bolt had to be bent in a "Zig Zag" shape to get it to center on the TBI and match the air cleaner. (not hard to do, I'm sure you can be creative there)

I still have the standard design exhaust, with the headers feeding a cross-over "Y" pipe and then a 3" pipe to the muffler. From there it is a Flowmaster muffler with two 2 1/2" outlets going to the rear of the truck. The fact that you are running 3" most of the way on a single exhaust could be hurting your exhaust flow characteristics a little. The principal is to have the gases create a slight vacuum as they cool to draw the rest of the exhaust out. If you run to big of a pipe, it then causes a reversionary pressure and it conflicts with the exhaust flow.

The truck is a 2wd short bed and it has been lowered. This is where you, the 4 wheel drive owner, may also suffer. The more air that you get under your vehicle, the more resistance you have to going forward. The tranny, rear axle, engine components, and even the floor pan can create a buffer to the air slipping by. The smoother or lower to the ground the better---like a NASCAR vehicle works.

The electric fans are made by SPAL and are sold by "Be Cool". They are a dual 11" fan setup that come with their own shrouds around them. I purchased them through Summit Racing under the "Be COOL" name, (Part # BCI-75007) The fans move around 2780 SCFM of air each, on their own and that is more than most GM factory fans. I mounted them to the back side of the radiator by running an aluminum strap across the top of them and the bottom of them in a designed groove and then mounted those straps to an aluminum strap on each side of the radiator running from the top to the bottom of the core. The bottom of the straps are mounted to the core support frame and the top of the straps are mounted to brackets that I mounted to the core support fram just above the radiator. At no time do the fans touch the core and they are just about a 1/4" from the core so that they don't pull a lot of air from the sides. I purchased the saluminum strapping at my local Hardware store. I used the SPAL fan controller (called a fan PWM) to run my fans. This controller turns on one fan and then if it is really hot it will turn on the second fan. This controller can be connected to the engine in various ways. The first way being a temperature sending unit of it's own and the plugged water jacket hole in the right hand head (by the spark plugs) would be a prime spot or you can connect it to a temperture sending unit that is already installed on the motor and adjust the turn on signal on the controller to match the output of that sensor. That is what I did. I used the sender on top of my intake manifold (by the T/stat housing)and located the one wire on it that had a varying output signal in it (showing the change to temperture) and spliced into that wire. Works like a charm. As a matter of fact, I have these same fans on my 84 GMC with a stroker motor and I plan on getting the same controller setup for it and remove the other sending unit that I have there. It presently turns both fans on and off at the same time. There are dozens of temperature controllers on the market, but I would stay away from any that has a probe that goes through the fins of a core, especially if the core is aluminum.

If you look close at the picture, you will see the fan relays and the fan controller to the right hand side of the battery.

For the mileage, the standard tricks should get you 18 or so mpg.
Good tune-up, free flowing exhaust, good airflow setup, and maybe a tbi spacer- the jury is still out on these, depending on who you talk to.
I am assuming you have at least 3.5 or so gears, some 3:1 or less would get better highway mileage, but powerband would suck. A manual trans would be worth 1 or so mpg, but prolly not what you want. Skinnier tires and lowering it would also net some mpg gains too, but you should be shot if you did that!
Take it for what it is and live with it, if you wanted good mileage, you should have got somthing other than a fullsize 4x4 with a v8.

I had an interesting conversation with a guy that now owns a newer Colorado truck. He purchased the 4 cylinder with 3.73 gears, so that he would have some capability to pull his tail end out of a hole with it. Well, he works that thing to death trying to get down the highway like the bigger vehicles and his gas mileage is around 15 MPG. This goes to show you that SMALL is not always the answer. That also goes with the idea of lower RPMs are not always the answer either.
A manual tranny is definitely going to get better mileage than an automatic, due to less slippage, but if you don't have one already, then the cost is prohibitive. Everyone has an opinion even me, but those are hard to drive and they usually get stuck in traffic. The things that you do, should be thought about carefully and applied a little at a time. This way you know what you are accomplishing. If something causes you to loose mileage, then take it off and sell it, OR look at what other item you could combine it with to get a better option.

Your 4 wheel drive is a brick, to say the least, but it can be smoothed some to make it better.

Take it for what it is and live with it, if you wanted good mileage, you should have got somthing other than a fullsize 4x4 with a v8.


I like my big truck... and I want to make her suck a lil less fuel... and this is fun anyhow. When I can tell people my truck gets 18mpg... that'll be cool lol :D Def not lowering tho :P

piecesparts- I have to remember that.... one at a time! Thanks :) I love my brick :P
Also, thank you very much for the explanation on the fans! Is there any chance I could get another pic or two of the fans themselves?

So far this tank is going better than last! Good sign my driving has improved.

Does anyone know where to get a chrome air cleaner with the two bolt setup?

I think the next step is that air cleaner, then probably an injector spacer, neevnav is getting one but is unsure if it will work with his airbox.

Does anyone think that visor hurts milage?

I like my big truck... and I want to make her suck a lil less fuel... and this is fun anyhow. When I can tell people my truck gets 18mpg... that'll be cool lol :D Def not lowering tho :P

piecesparts- I have to remember that.... one at a time! Thanks :) I love my brick :P
Also, thank you very much for the explanation on the fans! Is there any chance I could get another pic or two of the fans themselves?

So far this tank is going better than last! Good sign my driving has improved.

Does anyone know where to get a chrome air cleaner with the two bolt setup?

I think the next step is that air cleaner, then probably an injector spacer, neevnav is getting one but is unsure if it will work with his airbox.

Does anyone think that visor hurts milage?

Visor = air scoop and Yes it is restrictive to your MPG. Go with the "Brick Wall" theory; that means that a blunt nose or scoop carries air and that adds back to what the vehicle has to push along the road. Drivers that are shooting for speeds at or around 200 MPH block off the front ends of their cars with just about anything to get the air to move around it. This means that the radiator has to pull air from under the car. The resistance is worth about 7 MPH at those speeds, so there is a definitely something that can be attributed to your visor. I never had the desire for one of those things, so it is a choice thing. However, it can NOT hurt you to remove it.

As for the air cleaner, why not make a round rod shaped bracket that connects both bolt holes and then centers in the middle of the TBI. I would make it round, so that I did not have any air turbulance inside my air cleaner. Take off that old air cleaner and see if you could do it with just one piece of "All-Thread" bolt and only use one hole, instead of two. I am betting that the holes are in the same area as the one on my truck.

I will work on getting more fan pictures. I have a set in the basement waiting for my 68 Chevy project, so here they are. As you can see, I like what these fans can do on a truck, because this will be the third set I will have installed. They have not had any metal installed on them yet. The fans are pictured with an aluminum "Be Cool" radiator.

Do you run your blazer with an added hitch assembly on the rear and anything else that is heavy. That all adds to the weight that you are dragging around. Look at the thought of getting any unused weight off of the truck, the rear bumper is 35 pounds (roll pan), the hood is 50 pounds (fibergalss hood), the steel wheels are 40 pounds (aluminum wheels), big mirrors are wind resistance (Street Scene smaller units). See the pattern......

Here are more pics of the fans in the truck.

Update!
Jan 31

Just filled up, got 605 kms on 105L of fuel!
13.51 mpg
Thats almost an entire mpg in one tank (last was 12.64 mpg)

No changes that would have affect the entire tank, but at 500kms (last night)
-I did an oil change (10W30) and motomaster filter.
-I removed the warm air bypass (The part that closes up to allow more warm air to get in the engine, it has a hose from the manifold up) and covered the hole with a piece of metal. It wasnt opening the whole way anyhow.I painted the air cleaner all up and made it purdy too :D Seems to have a lil more go, not workin as hard to get moving, (now has about twice as much air flow!) but nothing major. Did not affect cold start, idle or drivability this morning. (about -15C)
-Checked tire pressures

Still driving 55mph. No hard Acceleration.

next up- Plugs, wires, cap, rotor and o2 sensor. Might run a new tube from the intake to the fender. Need a new Serpentine Belt too.

piecesparts- thanks for the pics! Probably will get around to that in a month or so.

I am here to tell you that paint on the air cleaner is worth a MPG in itself. That old motor is now thinking that I am the boss of this situation.

Thats right; chrome valve covers+20 hp, chrome ari cleaner +30hp and any other chrome accessories are worth 10hp or so each. If everything under the hood is chrome, the immense power cannot even be measured!

Anyway, as for the visor- lose it! You are not supposed to be able to even buy those if you are under 60 years old. Your truck is a 94, not 74.
Just bagging on you a little, sorry. But the visor destroys the aerodynamics work that gm put into these trucks, which, believe it or not , is a whole lot.

Good ideas for getting better mileage, but even better, I tell people that so what if my 85 4x4 only gets 11 mpg, just what they paid on state sales tax ($2800 on a $40000 vehicle) will buy a lot of gas. Figure $20,000 miles a year at 11mpg and a new truck at 19mpg. The older truck will use 800 gallons more, with gas at $2.30/gallon that's $1800. You are still $1000 ahead the first year. Once you figure in depreciation, the added registration on a $40000truck, the interest, unless you're paying cash, added insurance coverage, etc. I only drive my 85 about 8000 miles a year so it actually looks even cheaper for me, but my point is. There are so many more savings other than just gas usage. Another way to look at it is instead of a $500-$700 a month truck payment, I spend $150 a month on gas. JMO and another way to justify keeping the old girl.

Drive what you got and let the gas pumps squeal...

piecesparts... edman... hilarious :P

maybe i oughta get some chrome air valve covers... then maybe some valve caps that light up when my wheels go round? :help: lmao oh! I shoulda painted the air cleaner chrome... thatda been blingin ;)

I've def relized that its cheaper to keep her than get newer... and I'll never buy new :D

I am putting about 25000 kms a year on it, lil more than 8k but I'm comfortable and not crammed up in an econo box!!


love the visor comment... it just looks cool on the truck. I might get rid of it in the spring, when i get the bodywork done.
We'll see how much I like it (and if I have to pull anymore birds I hit out of it)

204 kms today wooo.... raptors game tonight was fun, hadda drive faster tho :P

oh... and I dont have a hitch in, and nothing much hangin off her cept the bar and the visor.

Any suggestions on a muffler to get? the one one there is about 2 feet+ long, wide and skinny. Offset in, centre outlet. Surely I can pick up some flow there. (after the crossover pipe I have 3 inch exhaust the whole way back) and since I'm keepin the truck, I'm makin it louder :hm:

Thanks!

The muffy is your choice, I think that the louder rumble will get on YOUR nerves, long before Johnny Law gets you. There is a breaking point where the stereo and the muffler noises are just killing you from both ends. As I stated above, I run a 3" inlet to the muffler and then dual 2 1/2" outlets to the tailgate area of my truck. I even tucked the exhaust tight to the frame and notched my roll pan, like a Corvette to get all of the clearance that I could. I run a Flowmaster muffler and it is close to the "DRONE" sound that will drive you out of the cab, during the winter months (windows closed). during the summer months, I drive with the windows open, because I like fresh air---and it makes it easy for me to tell the other drivers how great their driving is.

On my 84 GMC, I run a 383 stroker motor with long tube headers, 2 1/2" true dual exhausts and dual Flowmaster mufflers, to the rear of the truck. I have the cab insulated with Dynamat and it is really nice and quiet inside, even with the louder mufflers. The combination of the mufflers, cam and engine is loud enough to wake up a dog or two a mile away.


True excellence in performance is acheived when you go PAST the chrome and the shiney painted chrome pieces and go straight to the PINK plastic underhood goodies. PINK is worth 3 MPG and 25 HP just laying on the hood, NOT EVEN installed in the engine bay. If installed those parts will reveal true evidence that you are serious about your endeavors to go fast and that everyone will be absolutely screaming "Where did you get the BLINGY THINGS" and "WHERE CAN WE GET OUR OWN". Hold onto your hat, you will defintiely be the talk of the Sonic Drive-in, after that.

we def dont want drone... lol
but I do want it louder.
I like the noise... I like to be able to hear the engine. I've heard flows do drone tho?

Maybe I could get a PINK muffler! :lol:

Do you really think the 3 inch exhaust is hurting? It is less than say... 2.25 duals the whole way back is it not?
Even your exhaust has better flow than that... although your engine is built up a little, no?

I want to do a high flow muffler with a nice rumble... no cherry bombs on this one lol. oh... and my old truck with true duals 2.5 inch pipe the whole way no cats or mufflers didnt bother the cops.... my head didnt like it tho lol

Some really good tips there for ya so far. Here's more:

Like reducing speed
proper tire inflation
narrow tires instead of big n wides
front end alignment
keep gas tank half full or less ( full load of fuel weighs several hundred pounds)
limit how much gear, cargo, etc you haul around
make sure front air dam is in place
fresh tuneup on the engine
egr system working properly
check for front and rear brake dragging
less warmup time in cold weather
and that visor........;) well, it catches an awful lot of air

I am here to tell you that paint on the air cleaner is worth a MPG in itself. That old motor is now thinking that I am the boss of this situation.

I noticed all that chrome under your hood ;)

Some really good tips there for ya so far. Here's more:

Like reducing speed Check!
proper tire inflation Check!
narrow tires instead of big n wides (not changin then anytime soon, but how wide is too wide?)
front end alignment Check!
keep gas tank half full or less ( full load of fuel weighs several hundred pounds) how will i check my milage then? def a good idea tho.
limit how much gear, cargo, etc you haul around Check! (what about my fullsize spare?)
make sure front air dam is in place Check!
fresh tuneup on the engine soon!
egr system working properly
check for front and rear brake dragging
less warmup time in cold weather workin on this one.
and that visor........;) well, it catches an awful lot of air

Everyones hatin on my visor :P I think it'll be goin in the spring.


thanks for the ideas :D

I noticed all that chrome under your hood ;)


Yep, I gave up the gas mileage and Horsepower for PURDY ego, and BOY do I have an ego. There was a gentleman in my local area that used to come to cruise nights with his farm truck. It was a good clean Ford and looked fairly sanitary until you got to the PINK wire loom and spark plug wires. His vision was not mine---He was pretty positive that the old truck would hook up and run any one on the street. He usually lost, but to his credit, he tried hard.

The chrome on that motor is the cheap daily driver, the stroker motor is worse, than that. It hardly gets down the road. It gets 14.5 to 15 MPG with a set of 3.73 gears and a 700R4, putting out a little over 400 HP. This one is in my 84 GMC.

Showoff! :lol:
thats puuuurdy, me likey :D

Showoff! :lol:
thats puuuurdy, me likey :D


My bank acoount didn't. After breaking the rod in the other motor, I decided to do this one right and used a heavier duty selection of parts. The prices are slightly higher than the first 383 motor.

this tank might get a lil less.... hada few highway runs and tromping around.... we'll see, I'm just over halfway thru the tank at about 400 kms

next update!

13.08 mpg

little less, but I was on the highway and had to make it from my gf's place to my place fast to get my damn jeep running, so some loss there.

No new mods yet.

Likely doing a HEI Ditzy, 8.5 wires, plugs, and maybe an msd box in the next month or so. Def synthetics in both dif and Tcase soon.

Ditzy
http://cgi.ebay.com/ebaymotors/CHEVY-DISTRIBUTOR-LATE-EFI-THROTTLE-BODY-350_W0QQcmdZViewItemQQcategoryZ33690QQihZ016QQitemZ260080852883

Wires
http://cgi.ebay.com/ebaymotors/SBC-CHEVY-PLUG-WIRES-UNIVERSAL-8-5MM-90-DEGREE-BLACK_W0QQcmdZViewItemQQcategoryZ33692QQihZ016QQitemZ260083247247

Cooling Fans
http://cgi.ebay.com/ebaymotors/12-INCH-ELECTRIC-COOLING-FAN-PRO-SERIES-12-INCH-FAN_W0QQcmdZViewItemQQcategoryZ33600QQihZ016QQitemZ260083170690

Headers
http://cgi.ebay.com/ebaymotors/CHEVY-GMC-TRUCK-HEADERS-CERAMIC-COATED-88-95_W0QQcmdZViewItemQQcategoryZ33631QQihZ016QQitemZ260076146708

anybody used any of this guys stuff? Looks good, I dont know what to think of the hi output ditzy thats not abig name? its cheap, but any thoughts?

I want to do a high flow muffler with a nice rumble... no cherry bombs on this one lol

Do away with the muffler completely and just run off the cat. My '89 truck has no mufflers and just the factory cat and it has a nice rumble but does not get into the loud noise or the dreaded "drone". Actually I was surprised as to how quiet it is. Definatel quieter than my '93 that has no cat and runs a Flowmaster. Most muffler places can make you up a piece of pipe if you want to do it yourself. Just tell them the inlet/outlet size and about $5 later out of some of their cuts, you are good to go. Not much money to see if you like the sound.

Kevin

I like the way you think :D

Think they'd even bend it up for me too... haha Alrighty callin my muffler shop tommorow!!

80 bucks at the exhaust shop... back to doin it myself as per usual lol!

Where might I find a prebent pipe to replace my muffler, 3" centre inlet 3" offset outlet??

I'm thinkin flowmaster so far... see what they have for pipes

you could probably get away with flex pipe....

a buddy mentioned that... think it'll actually do the job over about 20 inches?

yes...

now, where to find 3 inch flex pipe thats 20 inches long?

At your local parts store..;)

my parts stores suck :P good ole small town lol I'll check out the napa :P

NAPA here doesn't carry it....try a muffler shop or an Ag shop...

On my truck, the connection of the "Y" pipe to the muffler was a straight 3" pipe (NO BENDS) and then the exhaust was run to the tail by doing the proper bends on the pipes to tuck them up tight to the frame.

I Hate flex crap, it always leaks and causes pain later. I like to do the job once and go onto the next thing.

Alright next tank.

13.22 mpg

Still no hard driving.

idling tons... like at least 10 mins per morning to warm her up, which is killing my milage (60-70 minutes of idling per tank) so I WANT SUMMER!!! haha but its staying steady, so I want to do before the next oil change, Seafoam, then a tune up. but I'm thinkin all that HEI stuff... so undecided when I should do it (expensive!!)

Feb 16 - 13.14mpg
nothing changed

Feb23 exactly 1 month from starting this...
14.51 mpg! almost got a whole 2 mpg :D

Only change this time around is i'm starting to lean on it a lil more on acceleration... weird. Same idle time as before.
I think i was acceleration TOO slow... and it was working to hard to get going. I'm going to keep doing it and see what happens

my 91 K1500 and my 93 C2500 both pull down right around 17 mpg. both 4L60s (the 93 is a 4L60E), both 3.42 gears. the K1500 had 245 75 16s on it, and the C2500 wears 225 7 16s. no mods to either.

obviously, that visor has to go. do whatever you can to free up the airflow in and out of the engine. the injector spacer is a good start. look into a Hypertech Power Charger as well. an adjustable fuel pressure regulator might be of good use to you as well. as far as exhaust, a set of headers will be a good improvement over the stock manifolds. ditch the stock cat, you can either run without it, or a good aftermarket unit. choose a good free flowing muffler to round out the combo. you might also benefit from a little ECM tuning as well.

To catch up on this---What HAVE you done to your truck since you started this whole thing? Also, is it cold in your part of the world---If so, then you are undoubtedly running a little rich, due to the temperature sensors enrichening the fuel mix, for the denser air.

To catch up on this---What HAVE you done to your truck since you started this whole thing? Also, is it cold in your part of the world---If so, then you are undoubtedly running a little rich, due to the temperature sensors enrichening the fuel mix, for the denser air.

No, havent actually done much to the truck yet except for changing my driving habits, I'm right now using this post to record my milage. I'm a poor college student. This summer I should be able to do something tho!:cool:

Oh it's bloody cold in our part of the world... High of -12 on thursday.

summer i'll bet I get 16 without any changes....easily

When you're doing you mileage calculations are you using the 3.785 L/G conversion, or are you using the Imperial gallon 4.55 L/G? That'll throw your calculations way off of any of ours if you're using the Imperial gallon.