Engine/Transmission (1998.5 - 2002) Fuel milage with Don M 1.5's?

[jmeehan]

I'm thinking of replacing my DD2's with a set of Don M 1. 5's, to try to get better milage. I'm also running a DD TTPM.

The best milage I ever saw was 20. 3, corrected for my 285 tires. That was with the TTPM but before I installed the DD2's. Since the 2's went in I haven't been over 18. I know some of that is my right foot, but 3 mpg for the 2's?

What kind of milage are people getting with the 1. 5's?

This is in a 4x4 H. O. with 3. 54 gears.

 

[Tcolesanti]

I was getting anywhere between 19. 4 and 23. 5 on level ground empty my truck weighs 7840 with me in it, and the 80 gallon aux. fuel tank.

 

[CORed]

Tcolesanti,



What kind of improvement did you get with the 1. 5's vs what you were getting before the install? Did you change anything else or are the #'s you have a true apples-to-apples comparison?



I'm just as interested as jmeehan.

 

[Tcolesanti]

With the VA box and stock injectors I got a little better mileage on just flat ground. Now with the EDM's I am getting the same on rolling terrain and better on level ground. The cruise control is a bit abrupt with the injectors if that means anything. This was a true apples to apples comparison I always put the tach on 2000rpm and it yields 77mph with the 315 pro comps. I did not change anything else when I did my injector swap.

 

[darkhorse]

When I replaced my stock injectors with 1. 5's my milage went up about a mile/gal. even though I was accelerating harder.

 

[KennethJohnson]

Darkhorse,

Which injectors get the best fuel mileage, the 1. 5's or the 275's.

Thanks, Ken

 

[darkhorse]

I've never used the 275's but others on the TDR have said that the 1. 5's do better.