A few questions about a 93

[BarlowCummins]

Hi, everyone. I am looking at a 93 250 longbox extended cab auto 2wd truck and I have a few questions. This would be a highway truck that would gather 300 miles a day and I need to be concerned about the milage. Does anyone have real world numbers with this truck's configuration? The truck is stock and may be the cleanest older truck I have ever seen. Also did the auto come in just a 3 speed that year only or was the 4 speed an option? I know the 94s had a 4 speed available but I am not sure about the 93. Any help would be awesome.



Thanks Corey

 

[CToney]

I only have experience with 5sp trucks. They tend to get better milage and can have the power turned up more. Do a search to find out more info.

 

[Philip]

That 93 should have a 518/46RH transmission in it. That is a 3sp with OD trans. No lockup converter.



Most of the 2Wd trucks seem to get around 20 MPG or a little more. If someone hasn't done much to the engine as far as fueling mods.

 

[PToombs]

If you want better mileage, put in a good aftermarket converter, a set of 190 injectors, turn the fuel screw in just a little, 14 or 16 cm exhaust housing, and a 4" exhaust,with a bigger air filter. You will most likely want a muffler, to combat drone.

This combo will put you in the mid 20's (23-25), or darn close to it.

This is what I plan on doing to my next ride, for mileage.

 

[peobryant]

If you want better mileage, put in a good aftermarket converter, a set of 190 injectors, turn the fuel screw in just a little, 14 or 16 cm exhaust housing, and a 4" exhaust,with a bigger air filter. You will most likely want a muffler, to combat drone.

This combo will put you in the mid 20's (23-25), or darn close to it.

This is what I plan on doing to my next ride, for mileage.

I wouldn't play with the fuel screw if I was going for better mileage. You could swap to 3. 07 gearing. With that O/D transmission, I bet she would be pretty high up in the MPG range. :-laf

 

[JLEONARD]

 wouldn't play with the fuel screw if I was going for better mileage.

Mileage is controlled by the right foot. Period.

Adjusting the fuel screw only allows you to use the power as you see fit.

My mileage never changed from day one unless I used the power... which I did often of course. But even then it would change by 2 or 3 mpg.

I would get 24/25 if I drove it sanely, 22/23 if I didn't.

 

[Jgolden]

Seems like the old saying, "it's better to have it and not use it, then to need it and not have it", applies to power in a first gen engine. I don't have a Dodge but once I got over using as much power as I had after I turned it up, my mileage was fine.

Pete's suggestion on the converter makes sense. I have a 545 Allison with what I guess is stock converter and it is pretty slow to move power to the wheels. More power might keep you in a more economical gear longer.

I could use a sign on back that says to cars behind me, "Thank you for blowing your horn, I did see the light go green and I am moving forward. . you just can't tell yet. " Doubt you have that problem with a pickup.

 

[Bob Beauchaine]

My '93 with the NV4500HD has been averaging 18. 5 mpg with mixed city/highway - about 50/50 - since Sept of last year. On highway only, at 65 mph I can see about 22 to 23 mpg. Crank the speed up to 70 and that drops to 20 to 21 mpg. Jay is right it's your right foot that will do the most damage to your mpg. Your mileage with an auto will probably drop slightly.



BTW I have tracked everydrop of fuel I put in the truck since I bought it new in Jan '93. Right now I've got 216,000 miles on her and average for all that mileage is 18. 34 - in all types of driving including towing.



Bob

 

[Midnite]

Don't forget advancing the pump timing. Advancing the timing, a straight through muffler, and a 16 sq. cm. exhaust housing on the turbo gave me the best milage improvements on my '92. The timing made the most difference.

Mike

 

[PToombs]

Parker, if you turn the screw in, you have more fuel available to pop the injectors, resulting in a better burn, which gives better mileage.



Mike, I forgot that one! Timing does help alot.

 

[peobryant]

Parker, if you turn the screw in, you have more fuel available to pop the injectors, resulting in a better burn, which gives better mileage.



Mike, I forgot that one! Timing does help alot.

Didn't know that. Well, that gives me a better reason to turn the fuel screw a little. After my injectors of course.

 

[AndrewKing]

HI

FWIW I get about 20 If I granny drive it (hard to do) but more often than not I get about 19 MPG's when driving about 62 MPH (that may be still considered granny driving to some! ;-)

Andrew

 

[BarlowCummins]

Just an update. I bought that truck and has good power. Plus has cruise and good AC. The fist tank I got 19. 5 MPG which was a combo of highway and city driving. I can't wait to see what milage it will get just on the highway.

Thanks for all your guy's help.