Engine/Transmission (1994 - 1998) Injectors, whats best?

[Balzac]

I consistantly got 28 mpg (Imperial) empty, summertime(above freezing) before and after adding #5 plate, boost elbow and 3K GSK, and 4"exhaust. My EGT was high so Piers suggested 215 injectors. I bought rebuilts from him, now my EGT is OK, but mileage is down to 19 - 22 (imperial).

One other factor, blew head gasket(2nd. ) on trip to ND last fall. Cummins in Minot did the gasket and said my cylinders were scored, not lightly. I did not see this so don't know the depth of scoring, if at all. They suggested a new block !NOT!

Towed the fifth back home, couldn't tell any difference in power.

After that the mileage was down, but the first no load driving with the 215's.

My conclusion and advice to others is to only do one thing at a time and test for a reasonable time before adding bombs.

 

[RVPILOT]

miles per galon

After driving over 3 million miles in my lifetime there is three subjects that raise bitter arguments. Religion, politics, and fuel mileage. Do you remember ths old days of the Mobile economy runs that I think were sponsored by Mobile gas and authenticated the triple A, those results were in the high twenties on the average, cars such as Ford, Chevy, and Plymouth, the Rambler would always win with mileage approaching 30 mpg. good luck. stormy

 

[Gifford]

28 mpg, LOL

He must have the "secret 100mpg carburator" that the oil companies bought the patent for... .



Lessee here 35 gallons of diesel, 28 miles to the gallon thats 980 miles per tank.



I have $1,000 dollars that says he's either full of **** or doesnt know how to compute mileage.

 

[Balzac]

Gifford



If you are referring to my 28 MPG you are telling all you don't know the difference between mileage calculated in imperial gallons. I could have listed my fuel ussage in liters per 100 kilometres, but I knew that would leave you without a clue.

Try this, 28 MPG X 4/5 = about 22 1/2 MPG US gallons.

You just lost your $1000, and please don't call others full of **** until you know what you are talking about.

PM me and I will send my address for you to send your money.

 

[Gifford]

28mpg

I get it now, but you wouldnt have been the first on the TDR to make outrageous mileage claims- using archaic measurements (imperial) was that an intentional attempt to cloud things? Why not just use metric? I still have a thousand dollars for anyone who can go 950 miles on a 35 gal tank.



Excuse my American ignorance- we tend to forget there are other societies out there. . (until we need to invade them).

 

[JWaters]

Re: ridiculous

Originally posted by Gifford

It is simply ridiculous to claim that a 6700lb CTD can get that kind of mileage under normal conditions. Either you dont know how to compute mileage,or your odo is OFF-- MANY of the ODO's on the Chysler products are way way off.

I drive my very easy and there is no WAY I can get over 23 mpg. I did get 23 one time last year coming back from tenn. Going south must help fuel mileage becasue I am going down instead of up

 

[JWaters]

Re: 28mpg

Originally posted by Gifford

I get it now, but you wouldnt have been the first on the TDR to make outrageous mileage claims- using archaic measurements (imperial) was that an intentional attempt to cloud things? Why not just use metric? I still have a thousand dollars for anyone who can go 950 miles on a 35 gal tank.



Excuse my American ignorance- we tend to forget there are other societies out there. . (until we need to invade them).

I can go 570, does that count and that is with me babying it. 354 gears, 2 wheel drive, k&n, stock everything. 5- speed.

 

[Mike Ellis]

Gifford,



You'd better caveat that bet with "1,000 miles at 65 mph or higher in a 2nd gen truck", there is liable to be some guy who will putt along at 50-55 mph and turn in a bona fide 28 mpg.



I suspect there are a number of 1st Gen trucks that can get close to 28 at speed, and possibly some 1994-95 2nd Gens that can get darn close. I don't think I'm gonna be seeing 28 out of my '97 3500 unless there is a lot of downhill action along the way. My experience indicates 23 mpg is possible in my truck with ideal conditions at sustained 65 mph, but much higher than that seems improbable (too many standard deviations away).



Might be fun to put together a "mileage convoy" with one of the TDR local groups, have everybody fill up at a designated spot and then take out together for some distant spot for dinner or such. On return, fill 'em all up again and calculate mileage. Same conditions, same road, same speed - ought to give interesting results. Would be particularly interesting if there were two or three of the "same" trucks - e. g. , '98 24V 5spd 3. 54, etc.



Short of a test like that, I don't think anyone will EVER make any sense out of the mileage variances. I am STILL WAITING for someone to explain how my Dad's Powerstroke gets essentially the same mileage on highway as my truck, when it has more than a full extra liter displacement. Is Ford turning off some of those Powerstroke cylinders at speed?

 

[Steve Roseman]

Originally posted by Mike Ellis

Gifford,



You'd better caveat that bet with "1,000 miles at 65 mph or higher in a 2nd gen truck", there is liable to be some guy who will putt along at 50-55 mph and turn in a bona fide 28 mpg.

That's what I was thinking... lol. I'm sure I could get close if I had the patience to drive that far at such a slow speed. Weight and wind resistance seem to affect my mileage more than rpm. Everyday driving without exceeding 65 mph nets the same mileage as a 1,200 mile highway trip at 70 mph.

 

[Gifford]

No Caveats! (Well, mebbe a couple...)

1st, second or THIRD gen truck, stock body (no Dodge chassis in a custom, one-off fiberglass aerodynamic tear drop shell!!) <---that's what it would take BTW to approach that efficiency level! Other than that, go whatever speed you want, I have a HOT grand for the first 28 mpg (US measurment for the obfuscators out there) Cummins Ram





Any takers?











... . thought so... .

 

[Big Best]

Ican go 1500 to 1600 miles on a tank of fuel. but of course i carry 85 gal.

 

[JSmith]

96 cc 4x4 285tires auto bhaf #6plate. 122000mi.

when I bought the truck it got 20mpg on the freeway. after a few mods it still gets 20mpg.



How do I know? Pencil and paper.

Mom lives 112 miles away. I can get there and back home on 12 gals. This includes driving to and from the freeway. How does my truck get 20mpg? Hell, I don`t know.

 

[Dieseldemon]

Mileage

35" tires and 3. 54 gears is where it is at

 

[Reddog1]

Gifford - I think I take exception to your "obfuscates " comment. I think you should keep it clean so we don't have to report you. I think I got some "obfuscates " on my shoes once. I like to never got it off.



I was waiting for some one to jump on Balzac. I didn't cause I couldn’t remember if imperial gallons was more or less than Yankee gallons. I didn’t want to show my ignorance. LOL



As for 28 MPG, show me! I don't care what generation of truck.





Wayne

 

[roadhawg]

Best of 23mpg for me!

I drive a first gen 3. 54 gears, 285 tires. 5-speed transmission.

The best milege I got was with 180hp injectors, and timing advanced.

Now with bigger injectors and more agressive pump settings I get 19. 5~ 20mpg very consistantly. Seems to get worse above 72mph for long peroids.

Truck weights 6400lbs emty.

Oh yea my wife can get better milege by about 1mpg.

 

[cpollard]

I put my 33's back on this past week from the 265's on the stock rims. I loose about 1 mpg from the big rubber. I do alot of short trip towing and have my foot in it most of the time with a trailer that hauls 500 gallon of water. I typically get 16mpg around town and 18mpg on the highway.



I can get 21mpg with the 265's on the highway and 20mpg with the 33's empty without trailer.





The way I have always understood this loss is the increase in rolling resistance from the heavier wheels and tires. I'm sure this is less of a factor for people who drive more highway miles.