c15 mpg

My twin turbo gets 5-5.4mpg. I've got an Ag. Solution power box on it and it runs Real Well. 1,024,780 miles . still running clean and cool. I pull an end- dump . open top some of the time.

Sorry forgot to say they both have 18sp transmissions.

I have a 2001 kW with a single turbo C-15 580 hp pulling a hopper or step and I average 7-9 but the foot feed has a lot to do with it c15s are really sensitive to bing in the throttle to hard on hills and even flat ground under a load take and drive it like you have an egg under the pedal for a couple days ams you'll see a difference on milage on any C15 or even the C16

I have a 01 c 15 In a 9900ix Doing local dump work 6 all the time The diesel doctor at effing ham Illinois Programmed it for me Before that I was the same as you

I have 2 single turbo cats and 2 Accerts. I have tried other motors, wouldn't own anything but Cat. We pull 13' 6" high 102" wide floors with exterior ribs. I pull more wind than anyone and run more big pulls than most. Here is what I have learned. The more power you can trust your driver with the better the fuel mileage. I have put a lot of money over the last 2 years in Bully Dog parts on my trucks. No regrets. I have 1 single turbo in the mid 5's and one accert the same and we are getting better as we go. My trucks run 75 mph and we don't spare the pedal. I have been down in the 3's. I owe my fuel economy to Ray at Arizona Diesel Solutions. Ray can help you give him a call 623-826-1256. He can help you with parts and ECM programming, but if you are that low on MPG there might be other concerns. Lets make sure we are chasing the right problem. Just my Opinion.

Art Pfluger

Im running an 07 W900L...with a Stage 1 PDI tune, 13 speed, 3.36 rears....I average almost 6 mpg pulling my dump trailer and well over 6 mpg (6.2 - 6.25) pulling my hopper. Before the PDI tune I average 5.3 to 5.5....PDI tune has done a world of good for me. Have a great day and be safe.

Thanks a lot.

Adam what kind of weight are you pulling? I run c-15's with single turbo's in my super trains and am getting that kind of mileage. Also what size gear do you have? I have an 07 t-800 big sleeper highway truck with 3;55 rears and a c-15 pulling a dump that averages 7.5-8 mpg. If you are running a tall gear in the rear end that could be your problem. If you are staying under 100,000 lbs you can go with a much smaller gear, that motor has more then enough power no matter how its set up. My trains all run 4;11 rears grossing 165,000 lbs doing city work. We do a lot of quad axle local dump work and have found that c-13's with 3:73 rears seem to work best averaging around 6 mpg with a fair amount of idle time. Also check your egt's because if you are running hot it tends to rob power from the engine thus killing mileage as well

I agree with Jeff. Good things to check. I am not going to bash the Diesel Doctor because I don't know him. I however would advise you to use people that are going to hook you up with proven mainstream power enhancements. I spend a lot of time fixing what a lot of people promote as programming enhancements. In full disclosure I have a connection to Arizona Diesel Solutions. We sell Bully Dog products. At the same time I cannot bash Pittsburg Performance or some others. I can only point out the diffence in the products and services of the stuff we sell vs some of the others. I own trucks with Bully Dog stuff and Pittsburg stuff along with parts that are mainstream CAT enhancements. Not everything needs to be out in public. You want our 2 cents please call. Our advice is worth what you pay. It is free. Ray however can give you the knowledge to ask the right questions, BEFORE you risk your equipment. My hearing and sociabilty are poor, so I always tell people to talk with Ray. He is a nice guy, I'm not. Shop number 623-826-1256

Art Pfluger

Run your overhead on your cat it could help.I have a 18 speed it helped me an get under your truck your fuel lines or old an wet they could be sacking air causing you lose fuel milage.

Put a ball valve in the rubber hose that goes between the turbo's and turn it off. Your mileage will jump about 1 mpg. You wont' notice much of a difference.

Which one will it do? Blow your engine or the turbo? I'm just curious. I did mine 9 months ago and all we do is mountain driving in Colorado and the only difference I've seen is I lost a little power, my engine runs cooler, and I get about 1mpg better fuel mileage. The single turbo kits are about $9000. I run about 2800 miles a week. So far no issues. I'll keep my fingers crossed and save the cash I've saved on fuel just in case!

when you block waste gate hose the turbo over speeds shortning turbo life.depending on how much fuel is turned up will determine how much it shortens turbo life..usually since waste gate no longer opens the exhaust temp. goes up..if you're looking for more boost a larger turbo is normally the answer, but without more fuel bigger turbo doesn't always spool kwik enough so you get turbo lag..a good performance program is normally the best answer..

you want 10 to 15 lbs more boost than exhaust pressure ..the exhaust pressure is measured from exhaust manifold before turbo..this is normally checked at w.o.t. while on dyno or loaded on hard pull..