improving fuel milege???
 

anyways to help with fuel economy in my truck??? :lol:

any little bit help, it averages about 11mpg right now.

here are the specs on it



355ci
10:1 Compression Ratio
Holley systemaxII alum. heads
Comp cams 270H magnum
Holley street dominator intake
MSD Pro-Billet distributor #8361
MSD Blaster2 Coil
MSD 6AL Ignition box
Edelbrock Thunder Series 650cfm AVS carb
Aeromotive Billet Fuel Pressure Regulator
shortie headers
K&N 4" Open Element air filter

3.73 gears
Eaton Limited-Slip Diff.

Th350c transmission
2800 stall torque conveter
B&M Stacked plate trans cooler
trans-go transpack



i'm thinking a new carb, but the one i want is SO expensive :( (650cfm mighty demon)

and i plan on getting a built up 700r4, but those are expensive too and the torque converters are expensive for them too!

Re: improving fuel milege???
 

It sounds like a built up 700R4 is the next step. That will be expensive, of course, which is why I don't have one. :)

I doubt you'll do much better than that with a TH350 and 3.73 gears. I'm surprised that your mileage is that high.

Slonaker

Re: improving fuel milege???
 

i was telling angie i was gonna spend our tax return on a new tranny and a blower for my truck. she just laughed at me :(

Re: improving fuel milege???
 

Man you should just sell me that truck and get you a Nissan Hardbody for increased fuel economy;) .

Re: improving fuel milege???
 

Putting a Demon on there would be going backwards in gas mileage in my experience. For mileage a spreadbore would be a better choice.

Re: improving fuel milege???
 

ah i know, but it'll have MORE POWER!!!

its not like i drive the truck everyday :)

Re: improving fuel milege???
 

MORE POWER usually equals MORE GAS...
If you don't drive it everyday... then don't worry about the gas mileage :)

Re: improving fuel milege???
 

I think fuel injection would be a good step for a bit of increased MPG and performance as well. Then a built 700r4....

Re: improving fuel milege???
 

if i was gonna spend that much money for fuel injection, i would much rather it go towards a blower :)

Re: improving fuel milege???
 

Actually the Blower would increase your fuel economy as long as you drive like a granny. Only problem is that 10:1 compression ratio needs to drop a few points before the blower goes on.

Re: improving fuel milege???
 

700r4's suck, listen, if you are wanting to do that get a gearvendor's overdrive

Re: improving fuel milege???
 

It's a tradeoff, with all those go fast goodies on the engine,10.1 compr. don't think it's gonna happen, since it's not your DD I wouldn't worry about it, cake is good but sometimes you can't eat it.:cool:

Re: improving fuel milege???
 

Consider putting a lower # gear ratio in ,like a 3.42 or 3.23. With your engine you would still have a good low end & be able to cruise without engine souding like its going to blow up. Ihad a 3.73 in my truck with the 3 speed turbo trans. but took it out . 350 / 3.73 is agood combo if you run mostly on the strip.

Re: improving fuel milege???
 

What is a gearvender overdrive. Im interested.

Re: improving fuel milege???
 

For wgat one will cost, you could buy another truck. I'd love to have one, but not for that kind of money.

http://www.gearvendors.com/

Slonaker

Re: improving fuel milege???
 

Dude, you've been around long enough to know the answer to this question. :crazy:

If you are getting a true 11mpg with current setup do a happy dance :lol: .

These bricks are not gonna get 18mpg despite the constant claims we all see here. :but:

Re: improving fuel milege???
 

You could always do the "Poor Man's" Gear Vendor..... This is an old "DoodleBug" for sale up here locally. It has a 4 speed attached to a 3 speed.

Re: improving fuel milege???
 

i know :( i just wanted to post some more in here :c2:

yeah its about 11mpg a little less on the highway. not like it matters, the mustang gets 20mpg so i'm fine with that. the trucks had maybe 300 miles put on her in the past year :whine:

so i'm gonna end up buying the speed demon 650 carb, which means i'll have that 650 edelbrock and accessories for sale soon ;) if anyone wanted to know:)

Re: improving fuel milege???
 

do the 700 tranny, I have one behind my big block witha 2500 stall(lock up) and it does 16-17 on highway at 65mph, of course thats no wind and good baro pressure yadda yadda....

Re: improving fuel milege???
 

Screw mpg, just focus an ET and forget the rest...:)

Re: improving fuel milege???
 

it's slow

Re: improving fuel milege???
 

i agee,if you want mpg....get a datsun.:cool:

Re: improving fuel milege???
 

haha its faster than my mustang.

Re: improving fuel milege???
 

what does the truck run, if i remember the stang is 13.80x

Re: improving fuel milege???
 

the mustang ran a best of 14.2 @ 100mph

the truck ran a best of 15.09 @ 90mph with 2 flat cam lobes, open rear end with 2.73 gears and an untuned carb(which it still is)