whats best upgrade for mpg on a 24 valve? - Diesel Bombers



5.9L 24V Performance Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps Related To Performance And Longevity

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 09-17-2012, 02:37 AM
Diesel Fan
Thread Starter
 
Join Date: Sep 2012
Posts: 32
Default whats best upgrade for mpg on a 24 valve?

hey guys new to the forum and new to the 24 valve cummins a previous 7.3 psd owner and was wondering currently in town i get about 15 mpg and freeway about 18 i was hoping either do injectors or a chip not sure which one will yield best mileage currently have a 4" turbo back straight exhaust and a s&b cold air intake with a airdog 100 lift pump the trans is the stock auto with 110k on the truck any pointers as to what will yield the best mpg for me? and not kill my trans

---AutoMerged DoublePost---

oh ps any tips on what a good chip or injectors are would be great had a shop quote me $100 a piece to do injectors to 75hp and figures that will gain me about 2-3 mpg the truck is also a 2wd only diff is factory are 245 tires and its got 265's on it

Last edited by cummins24valve; 09-17-2012 at 02:37 AM. Reason: Automerged Doublepost
Reply With Quote
  #2  
Old 09-17-2012, 08:15 AM
RAW's Avatar
RAW RAW is offline
Administrator

iTrader: (1)
 
Join Date: Aug 2009
Location: Alberta
Posts: 6,218
Default

Does that $100/ea include install? If not, that's STEEP! I had 65HP injectors before my 150's, and they were very nice. Everything about the engine changed in a positive way. Better mileage, better starting, more power, they really helped out. Unfortunately, even injectors of that size have the potential to take out a stock auto if your not careful. Same goes for chips. Even a 65hp chip/tuner can wreck the auto.

I would suggest a used Edge EZ, or a Smarty. The Smarty will hold it's value much better for resale down the road, or just keep it. The EZ's go cheap, as they don't add too much power. Both will help with mileage. The Smarty comes with a Mileage setting, and it works well.
Reply With Quote
  #3  
Old 09-17-2012, 12:17 PM
lobsterman04's Avatar
Diesel Enthusiast
 
Join Date: Apr 2009
Location: Dyess AFB, TX
Posts: 138
Default

x2. A mileage chip and injectors will wreck an Auto trans. TQ and valve body should be enough with a smarty and RV injectors. Also, to answer your question...50-75 injectors and a Smarty is my opinion for increased mileage. I saw an increase with 150's until my foot got heavy
Reply With Quote
  #4  
Old 09-17-2012, 04:51 PM
vcustoms86's Avatar
Diesel Wrench
 
Join Date: May 2009
Location: Colorado Springs, CO
Posts: 614
Default

I noticed a big gain when I went to DDP 50hp injectors and put on a 3 piece manifold. Also, if you havent done it in awhile, a valve adjustment is in order. With a stock auto, I wouldnt try to add to much before you put some money into that.
Reply With Quote
  #5  
Old 09-17-2012, 10:24 PM
Diesel Fan
Thread Starter
 
Join Date: Sep 2012
Posts: 32
Default

yes the $100 includes install and as far as driving goes i dont really drive aggressive i take my time where im going as im trying to get good fuel economy however i do tow equipment ranging from 6k-13k and that would be when id be driving it moderately to hard if im going over a mountain pass so i was also wondering if i did just injectors alone would that be best or a chip better which one would result in more of a mpg gain? maybe i'll only do one mod just trying to get my mileage to hopefully about 18 city and 22 hwy if possible i doubt that with mods i could get any better than that

---AutoMerged DoublePost---

and also so RAWilliams you recommend just a smarty tuner by itself? any guess what i'll gain as far a mileage goes with a smarty? granted as long as you drive nicely

---AutoMerged DoublePost---

and for those of you that recommend injectors should i have a shop change mine over to 75 hp or should i just go with DDP injectors are those the best? i see injectors that are like 4-6 hole guess the more holes the less fine your fuel atomization is?

Last edited by cummins24valve; 09-17-2012 at 10:24 PM. Reason: Automerged Doublepost
Reply With Quote
  #6  
Old 09-17-2012, 10:29 PM
RAW's Avatar
RAW RAW is offline
Administrator

iTrader: (1)
 
Join Date: Aug 2009
Location: Alberta
Posts: 6,218
Default

The Smarty is probably the best turner you can get for the 24 valve, VP44 engine. The Mileage mode does work very well, but it's hard to say exactly how well. I'd say a gain of UP TO 4mpg could be had. You have 9 levels, each with many sub settings. The Mileage mode is easy driving, and good mileage. It has lots of timing though, so while towing heavy it is advised to switch to a different tune. Timing can make a huge difference in power, and economy. Injectors alone won't change timing, just how much fuel can be injected.

More holes is BETTER Atomization, as they are typically smaller holes.
Reply With Quote
  #7  
Old 09-18-2012, 01:10 AM
Diesel Fan
Thread Starter
 
Join Date: Sep 2012
Posts: 32
Default

ok so go with a smarty tuner first and do injectors after i do trans? i dont think if i did get a smarty id run anymore than 50 hp just run it on a mild tune if towing and mostly the mileage tune for everyday driving

---AutoMerged DoublePost---

Well I found a smarty chip for sale guys asking $400 here's a link to it I'd appreciate your guys opinion on if it's a good buy or not Smarty Tuner for Cummins

Last edited by cummins24valve; 09-18-2012 at 01:10 AM. Reason: Automerged Doublepost
Reply With Quote
  #8  
Old 09-18-2012, 08:04 AM
RAW's Avatar
RAW RAW is offline
Administrator

iTrader: (1)
 
Join Date: Aug 2009
Location: Alberta
Posts: 6,218
Default

$400 is a good deal on a Smarty. They hold their value well. You can always try to get him down a little, but $400 is a respectable price.
Reply With Quote
  #9  
Old 09-18-2012, 08:22 AM
Diesel Enthusiast
 
Join Date: Aug 2012
Location: butte mt
Posts: 360
Default

i got a smarty with 9 tunes i like it if you dont have a timing box they say to use odd numbers on the tune why is trhat?
Reply With Quote
  #10  
Old 09-18-2012, 08:28 AM
RAW's Avatar
RAW RAW is offline
Administrator

iTrader: (1)
 
Join Date: Aug 2009
Location: Alberta
Posts: 6,218
Default

Odd numbers add timing, even numbers don't. Too much timing can damage you engine.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Shrader valve diesel's best friend Bill in Ballard Ford 83-94 6.9 and 7.3L General 3 03-13-2016 08:42 PM
47RE valve body into a 48RE.?? jeremiah1 5.9 Liter CR Dodge Cummins 03-07 0 07-21-2015 07:35 PM
Losing Prime, could it be the schrader valve? Baradium Ford 83-94 6.9 and 7.3L General 3 03-09-2015 08:15 PM
turbo LTreis702 Chevy/GMC 6.2L and 6.5L 4 02-14-2015 01:52 PM
will a crazy carls p pump a.p.p.s. kit work on a 12 valve in a 99 ram bonestock 24 Valve 2nd Gen Dodge Cummins 98.5-02 0 02-01-2015 09:41 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 09:06 AM.