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Diesel Fuel Economy and chips

391 messages,  Last post on Oct 28, 2009 at 4:28 AM

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What is this discussion about? Ford F-250 Super Duty, Chevrolet Silverado 2500HD, Dodge Ram Pickup 2500, Ford F-350 Super Duty, Chevrolet Silverado 3500, Dodge Ram Pickup 3500, GMC Sierra 2500HD, GMC Sierra 3500, Fuel System, Performance Mods, Fuel System, Diesel, Fuel Efficiency (MPG), Truck

#146 of 391 Not all the same by one4speed Mar 30, 2006 (9:11 pm)
I just cruised all of posts on this forum. (Doing a little research for other reasons). There are several chips and modules on the market. I see several posts with concerns about fuel mileage, exhaust temps and warranty issues. If you simply want a fast truck get whatever produces the most hp. If you want reliability, fuel mileage and safety there are products out there that fit the bill. Not all performance products produce high egt's. If it smokes more than stock you are making higher egt's than stock. The smoke is un burned fuel. Remember not all products make heat. The newer diesels will tolerate higher egt's but, be cautious. More hp is hard on the drivetrain. Most modules and chips yield better fuel mileage when driven "normal". All of the current diesel engine have an rpm sweet spot. My Dodge gets super mileage under 74 mph. After 74 I loose 2 mpg with or without a performance device. If I could stand to drive 65 and under it would certainly get 21+. I just don't have the patience for that.   Most people wonder why there are people with the same EXACT truck get better or worse fuel mileage than they do. The biggest variable in current diesels is injector build quality. The injectors are called good if the fit in a 20-30% range. The variable depends on the make of truck. If you get a truck with 6 or 8 better quality injectors your truck will have more power and get better fuel mileage than the person with the lower percentage of quality injectors. Most aftermarket performance injectors are simply a balanced, calibrated set. Companies work the injector to get 100% efficiency. They yield better fuel mileage and more power. My experience is the Duramax has the most consistent mileage and power. The Dodge is 2nd but, seems to vary. The pre "600" Dodges yield better fuel mileage. The 03-04.5 Fords were all over the map. I have seen people get 11mpg loaded or empty and others get 15 pulling with their 6.0. I have a friend with an 03 6.0 that gets 12mpg empty and loaded. I find that really weird. Word is that Ford has fixed most of their injector issues in their 05-06 models. The fuel changes over the most recent years has magnified the fuel economy variables even more. I am by no means an expert but, have done quite a bit of research.   Hope this helps, one4speed Replies to this message: frankoduramax (Apr 10, 2006 8:59 pm) jim314 (Jul 30, 2006 4:05 pm) wgreen4 (Apr 20, 2006 1:20 pm) kcram (Apr 24, 2006 6:15 pm) ddf1 (Apr 24, 2006 6:35 pm) snowmanx (Aug 20, 2006 10:03 pm) and 2 more...
#147 of 391 Re: Not all the same [one4speed] by frankoduramax Apr 10, 2006 (8:59 pm)
Replying to: one4speed (Mar 30, 2006 9:11 pm) Come out here to So Cal, and you will "find" the patience for that 21+ MPG LOL....Ca High Patrol will see to that...I was bullhorned going out to the desert for 58MPH while towing my trailer and Dune buggies. I think MPG has a lot to do with driving style...I drive my truck like grandma, only flooring it sparingly i.e. freeway on ramps, etc..It's plenty fast, 2006 Duramax,6spd,Afe,4 inch SS exhaust, Bully Dog set 350HP and 774 Ft lbs torque... And drive 65 MPH(vig enforced here) or less...I have a TRD Prepped Lexus GS 400 capable of 160MPH IF I want to drive fast,w/ the the brakes, handling, etc...These are trucks, and most peoples daily driver/fun toy hauler. I did NOT know about injector variability....mine seems to run good. I also wonder IF all these people are switching to BIGGER tires, then throwing the MPG off...almost every Diesel around here has big tires, but how many have the proper re-programmer to adjust the size???I'll venture to say this plays a bigger role IMHO then any other single variable out there, IMHO, Franko Replies to this message: jim314 (Jul 30, 2006 4:05 pm)
#148 of 391 Re: Diesel in Envoy's ect ! [vzn05y6c] by jimhemi Apr 18, 2006 (8:16 am)
Replying to: vzn05y6c (Mar 30, 2006 10:25 am) I don't know about GM's plans but I currently own an 2006 Jeep CRD and love it. I drive it like a rented mule, 80-85 on the Highway for an hour drive and back and get a little over 26 mpg on the tattle tale trip computer. I hope more manufacturers embrace Diesel so we can lessen our dependence on foreign oil. Replies to this message: manley (Apr 18, 2006 11:35 am)
#149 of 391 Re: Diesel in Envoy's ect ! [jimhemi] by manley Apr 18, 2006 (11:35 am)
Replying to: jimhemi (Apr 18, 2006 8:16 am) I also have a CRD and love it. If I could have stuck with chevy and gotten a diesel that didn't have a 500ft-lb i would have. I am still getting the out of the box milage 22-23 mpg, considering Diesel is 10 to 20 cent cheaper per gallon than gas is (here in SC) that is really good.
#150 of 391 Re: Not all the same [one4speed] by wgreen4 Apr 20, 2006 (1:20 pm)
Replying to: one4speed (Mar 30, 2006 9:11 pm) I do not know what you mean by pre "600" Dodges. Please enlighten me. Thanks Replies to this message: kcram (Apr 24, 2006 6:15 pm) ddf1 (Apr 24, 2006 6:35 pm) snowmanx (Aug 20, 2006 10:03 pm) snowmanx (Aug 20, 2006 10:06 pm) and 1 more...
#152 of 391 Pre 600 Cummins by ddf1 Apr 23, 2006 (8:17 am)
wgreen4 the pre 600 is the TD with under 600 lbs torque, and post is over 600.
#153 of 391 Re: Not all the same [wgreen4] by kcram HOST Apr 24, 2006 (6:15 pm)
Replying to: wgreen4 (Apr 20, 2006 1:20 pm) Referring to the Cummins engines prior to January 2004.   kcram - Pickups Host Replies to this message: ddf1 (Apr 24, 2006 6:35 pm) snowmanx (Aug 20, 2006 10:03 pm) snowmanx (Aug 20, 2006 10:06 pm) banshee1 (Aug 30, 2006 1:52 pm)
#154 of 391 Re: Not all the same [kcram] by ddf1 Apr 24, 2006 (6:35 pm)
Replying to: kcram (Apr 24, 2006 6:15 pm) Lookin up some info the "Cummins 600" name came about on January 1, 2004, with th mid-04' model. Inconel valves and high-cobalt content Stellite exhaust valve seats complemented revised ports with less swirl, a bigger turbo compressor wheel, and electronic wastegate control for the HY-35 turbo... Courtesy of "Diesel Power"
#155 of 391 Re: IS IT OK? [dieseldan] by coontie57 May 30, 2006 (7:01 am)
Replying to: dieseldan (Apr 14, 2005 5:02 pm) I put an Edge chip in my 99 2550 Ford with the 7.3 and if anything the mileage went down. For the most part I couldn't see a great power increase... setting 2... I had it removed before taking it to the Ford dealer for warranty work on the tranny ... I won't put it back on... It was nice however to see EGT's... etc.. Too bad Ford didn't put guages on the dern Ford. I guess they didn't trust us with too much information.

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