Engine/Transmission (1994 - 1998) How does fuel plate effect fuel ecomomy

[mechanic]

I have a 94 2500 2 W/D 3. 54 gears, automatic. It is stock in all departments except that I did reseat and pin the KDP. It was stalking my engine looking for the proper time to fall into the T/gears. I also have a stock exhaust except with out muffler or cat. I also repaired the cooler lines connectors. My problem is that I pull a 31' Airstream whick I am told weighs in at about 7000# +- and also a 20' car hauler weight dependent on what I have on it. Trailer is 2500# empty and I will at times for short pulls have as much as 9000# pay load on the trailer. I am wanting to get more torque in the 1800--2200 rpm range. I was looking at a fuel plate and retipping the injectors as I have one that is not delivering full power at times. It has a partial miss at full or near full throttle at times. I gathered from some of the posts on the forum that the #6 plate would be near what I want. I do not want to kill the fuel economy. I get N/L millage of 22 MPG at 75 mph now and 19 mpg local. H/W millage with a 5000# trailer at 75 mph is 16. 5 on a 2000 mile trip, Oklahoma to /Chattanooga, Tennessee. What has you experiance been with the plate change? Another thing I have found strange is that the oil in this engine will stay clear for 5000 miles. When I drain it it is still almost as clear as when I put it in. I find this unusual for a diesel. I like it but I believe it is because the truck is lean. I also get no smoke at the exhaust. Any feedback would be helpful.

 

[MLee]

I don't think I would touch it. Thats good mileage, and clean oil. You could slid your plate forward a little, BUT MARK the original place with a scrib. put in some gages and see how evey thing is performong though.

just my penny's worth.

Marv.

 

[TPCDrafting]

You might also consider a 3k GSK. My mods haven't effected my mpg. Only my right foot can take it down. Pulling about the same loads with a 2 horse GN trailer, my mileage hasn't changed. As stated, put in some gauges, a pyro, transmission temp and boost for starters. Adding power could greatly effect the life of your auto transmission, keep that in mind.

 

[The patriot]

With that kind of MPG's I'd be tempted to leave it alone, or maybe just bump the timing up a wee bit.

Eric

 

[GrantP]

My mileage did not change at all after the plate and GSK install, still 17 in town, 20 hwy unloaded. The only change has been a big improvement in power and driveability and a little smoke out of the tailpipe under load.

 

[mechanic]

Thanks for the come back Mary, and everyone, would like to get a few more if you are out there. About the jig for the KDP. I did mine and a customers with out it. I pulled the cover to ck the pin and it was out aways from the seated position, so I drove it back in and then sighted to get the angle to drill, and then drilled the hole and tapped it, then countersunk it and put in a screw long enough to cover the DP hole. Then reinstalled the cover and a new crank seal. Worked like a charm.



mechanic >>>David 94 2500 2 w/d

 

[mechanic]

You might also consider a 3k GSK. My mods haven't effected my mpg. Only my right foot can take it down. Pulling about the same loads with a 2 horse GN trailer, my mileage hasn't changed. As stated, put in some gauges, a pyro, transmission temp and boost for starters. Adding power could greatly effect the life of your auto transmission, keep that in mind.

Please excuse my ignorance, but I do not recall what the accronim 3K GSK refers to. Please elaborate.

Thanks,

mechanic>>>David L 94 2500

 

[moparguy]

3KGSK = 3,000rpm governor spring kit. A spring kit that raises the fuel cut off point by about 500rpm. A very nice addition.

 

[bmoeller]

When I put in the #10, I never saw a decrease in the mpg. Same with the rest of the mods I have. Since adding the injectors, my mileage has come UP, not down. I used to get 16-16. 5mpg running 70-75mph (4. 10 gears). Set new high of 17. 5mpg runnig the same speed. I have little to no smoke from mine, unless I hammer it after 4th gear lock-up. I have the AFC spring kinda tight to control smoke and help the stock (ya, I know, needs BOMBed) transmission live a little longer by reducing fueling off the line.