Typical Average MPG unmodded?

[Josh]

Hey guys, what kind of gas mileage are you getting with your D24Ts? My 740 TD wagon AUTO() seems to be getting around 500 or so miles per tank... so about 33MPG. Anyone getting higher than that?

Anyone that have modded getting better gas mileage?

I'm looking to see if I can do anything to hit 40... Wonder if its possible.

[reed]

Mix of city and interstate. 25mpg. Auto trans. I paln on installing rebuilt injectors with bigger nozzels and set to 2500 psi. I have all the shims for the injectors and the Volvo injector tester/cleaner. All I need to do is order the new nozzels and get off of my lazy a$$

[Jason]

Depending on what kind of mufflers the car has, (sometimes they are replaced with muffler shop non diesel mufflers that are restrictive) I would throw them away. If noise is a concern, install a straight through diesel muffler. Other than clogged exhaust/dirty air filter, the single biggest thing that will affect mileage is the injection timming. More timming will net you better mileage. Assuming your injectors are not worn out. Time it at the top of the spectrum. You can go farther, though it will have more injection rattle, and I have found they idle a little rougher. I would try to get the timming between .90 to .95mm. If you have very high mileage, you may want to think about getting your injectors pop tested, or possibly rebuilt. 33 mpg isn't bad, depending on your commute. Is that a mix of city and highway, mostly highway? The auto will get good mileage on the highway, with the lockup converter. Around town is where the manual will show the mileage advantage, since the auto wont lock unless your going around 50 mph.

My auto has been getting around 30mpg, but that has been with me running the crap outa it, and blowing lots of smoke on the ricers around town...

Jason

[Jason]

Reed, hat nozzles are you planning to use?

Sorry not meaning to hijack your thread...

Jason

[reed]

I was thinking about running the 253 nozzels. The d24tic ran the 293. I thought it would be a good start.

[Jason]

Is that the part number or?

Jason

[Josh]

I'm planning on putting a straight through 2.5" exhaust on it when I get the money. How do you adjust the injector timing? How does that affect power?

Also, I just rolled over to 113k miles on my car today, high miles right?

[cuaz64]

Originally Posted by Josh

I'm planning on putting a straight through 2.5" exhaust on it when I get the money. How do you adjust the injector timing? How does that affect power?

Also, I just rolled over to 113k miles on my car today, high miles right?

in turbobricks you can find premade exhaust systems for a good price. Also,timing affect power/fuel consumption as in a gas engine. Based on info form volvoturbodiesel.blogspot.com, changing the timing help to have a better fuel combustion or something, supposedly, a well tuned pump, an intercooler, good quality fuel and careful driving, can push the MPG to 40. Slobodan gets 38MPG with his car.

[Jason]

To adjust your timing, you'll need the dial indicator and special ve pump fixture to hold it. Advancing the timing will do a couple good things, such as improve mileage, reduce smoke, and usually gives you more crisp throttle response (compaired to retarded timing). 2.5" exhaust would be nice, but the stock size isn't any smaller that the turbo outlet to begin with. If your not looking to make more power, just removing the mufflers should be fine to help it breathe. As I said, you can always install another just make sure its a diesel muffler.

Here is the timing adjustment procedure:

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Jason

[oregon101]

I'm getting about 26-28 in city driving. My 760 has the four speed auto.