Best Mileage Injectors

[jponder]

If you were going to buy injectors and your only concern was mileage which would you get. Isnt it pretty much accepted that 275s will increase mileage. Has anyone with dd or BD 1,2,3s ever checked mileage on a long trip with cruise on?

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2001 ETH/DEE ST 4X4 SPACE SHUTTLE

 

[MikeR]

Of all the injector swaps we've done up here,the only ones that increase mileage are the 275's.

-Mike

 

[jponder]

Originally posted by MikeR:
Of all the injector swaps we've done up here,the only ones that increase mileage are the 275's.

-Mike

Thanks mike. Just curious though has anyone went to some bigger than 275 and really tried to check mileage without getting on it, like just make a leisurely cruise somewhere. I am asking becuase 275s are the most conservative injectors right, so maybe the people who buy them are more conservative
where as people who buy DD IIIs buy them to get on em and hot rod. So I just wonder if anyone ever put on some DD III and went for a 65 MPH 500 mile cruise controlled trip?


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2001 ETH/DEE ST 4X4 SPACE SHUTTLE

 

[MikeR]

Well mine has the DD stage II's in it and I take lots of long trips and cruise liesurely to get the best economy. Mileage is completely unchanged from stock.

 

[JyRO]

Where do you get the 275's? Who makes 'em?

- JyRO

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Y2K 2500 Cummins ETC/DEE, SLT+, 4X4, Quad, LB, Intense Blue Sport, 3. 54 LSD, rear aux. springs (camper special), sliding rear window, all options except cab clearance lights including agate leather, totally stock engine, silencer ring removed, "stealth," mod to run fogs with high beam. Since everybody else listed their toys, I will too.
1995 Kawasaki ZX6-R (For Sale)
1990 Toyota Celica
1983 Mazda RX-7 GSL (For sale)

 

[buttugly]

Originally posted by JyRO:
Where do you get the 275's? Who makes 'em?

- JyRO

Try dieselservices.com


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2001 2500quad4X4 auto KN Black Leather loaded Boost and EGT gauges

 

[roadranger]

I thought the idea behind upgraded injectors was to INCREASE fuel flow? (for more power)
Isn't this the opposite of mileage economy?

Seems like the one thing that advertise they increase mpg are the boxes that change the timing of injection. (like DD tru torque) The Cummins built for Dodge is politically correct with retarded timing to pass govt. emissions regulations.

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Deezul Doug-2001. 5 ETH/DEE,QC 4x4,3. 54 anti,
Tow/Camper,stock so far...

2001 Volvo S80T twin turbo

 

[Bigsaint]

No long trips since the BD stage III's are in, but I've kept a running log of my mileage since stock. I was getting 15 MPG when I first purchased the truck and with "summer diesel". My mileage went down to 12. 5 with the winter mix diesel, back up to 13 MPG with the PF additive. Stayed around the same with the addition of the EZ. With the stage III injectors, my MPG is holding steady at 12. Now, I know these MPG figures are not high, but all of my driving is in town, that is, never out of 5th gear and alot of time spent in 4th, climbing the "hills". Bottom line is, if your looking for good MPG's, go with the 275's. If you want more HP than what the 275's will provide, the stage III's are the way to go. I doubt anyone is getting "great mileage" from stage 1,2 or 3 injectors, but it sure is fun having them #ad


Scott W.

White 2001. 5 3500 ETH/DEE 4X4 Quad cab SLT,tow package and camper prep,Husky liners front and rear,DiPricol pyro,boost and oil temp gauges,Edge EZ,Psychotty air,Bully Dog stage III injectors,ATS 3 piece manifold,HX40 turbo,4" BD exhaust,4" BD E-brake,McLeod clutch,Mallory 4150 lift pump,Mag-Hytec rear,Mopar tonneau,Lund bug shield,PM tractor utility back up lights,Penda bed mat and blow by bottle is bye bye !!! I love the smell of diesel in the morning, it reminds me of... . VICTORY !!!
<A HREF="http://albums.photopoint.com/j/AlbumIndex?u=1231655&a=9089608" TARGET=_blank><font color=red>My Truck</font></A>
<A HREF="http://albums.photopoint.com/j/AlbumIndex?u=1231655&a=9089604" TARGET=_blank><font color=red>THE SAINTS</font></A>

 

[jponder]

Diesel Doug> I have never really understood exaclty how the injectors accomplish what they do.

Mike> Thanks that is good info. I think I will try some RV275s

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2001 ETH/DEE ST 4X4 SPACE SHUTTLE

 

[jjdiesel]

The key is the spray pattern of the injector in the combustion chamber. DD's injectors optimize the spray pattern, hence cleaner burn and less fuel needed to accomplish same task, despite having larger orafices in injector tip. Fuel atomization is key... that's why air in the fuel is such a factor, it disturbs the spray pattern defeating optimum fuel burn. . a 1/2 fuel supply line helps this situation, one outfit called Fuel Preporator claims to completely eliminate air in the supply to the injector pump resulting in 2-3 mpg increase... . interesting

 

[jponder]

Originally posted by jjdiesel:
The key is the spray pattern of the injector in the combustion chamber. DD's injectors optimize the spray pattern, hence cleaner burn and less fuel needed to accomplish same task, despite having larger orafices in injector tip. Fuel atomization is key... that's why air in the fuel is such a factor, it disturbs the spray pattern defeating optimum fuel burn. . a 1/2 fuel supply line helps this situation, one outfit called Fuel Preporator claims to completely eliminate air in the supply to the injector pump resulting in 2-3 mpg increase... . interesting

JJ do you think this is something that works. Are you considering trying it? I think you posted this in another post and evryone thought it was fake. I cant tell if you think it is for real or fake. What are your thought on it.



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2001 ETH/DEE ST 4X4 SPACE SHUTTLE

 

[roadranger]

Diesel Doug> I have never really understood exaclty how the injectors accomplish what they do.

jponder> they have larger orifices and flow more fuel, and as jjdiesel said, optimized spray pattern.
The 275's or DD1's with a timing box like EZ and DD true torque reach the ultimate ratio of fuel and cylinder area for miles per gallon.
Larger injectors and 'fueling boxes' like the
PE pour more fuel in the cylinder for horsepower gains.

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Deezul Doug-2001. 5 ETH/DEE,QC 4x4,3. 54 anti,
Tow/Camper,stock so far...

2001 Volvo S80T twin turbo

 

[jjdiesel]

jponder... . I'm for real,no fake. #ad
I am seriously thinking about it. I spoke with the owner of Fuel Preporator last week and he sent me some info on it. Check out the web site... if you're into the mileage thing like we are I think it is a very worthwhile investigation. Everyone that has done it has claimed improved mileage. I'm considering asking about a group purchase thing for us mileage freaks... what do you think? #ad

 

[Mopar-muscle]

i got an honest 1. 5 mpg mileage increase with the addition of 275 injectors , i will be switching to DD3's soon , and will make note of mileage , if its bad , after i do things i am commited to do , out they come and the 275's go back in . i will install them when i go to the track or for a dyno run event .

as far as fuel line issue , first thing to do is remove restrictions in the stock system , larger fuel line won't help if you're still trying to push the fuel thru the restriction of the banjo bolts ... EDIT ... actually the fittings that the bolt run thru and connect to the fuel line is the restriction , removing them and drilling outthe fitting as large as possible will increase fuel flow ... . also moving the lift pump back near the tank to a switched constant 12 volt supply will help increase pump life .

[This message has been edited by Mopar-muscle (edited 03-09-2001). ]

 

[Mr. B]

Originally posted by jjdiesel:
jponder... . I'm for real,no fake. #ad
I am seriously thinking about it. I spoke with the owner of Fuel Preporator last week and he sent me some info on it. Check out the web site... if you're into the mileage thing like we are I think it is a very worthwhile investigation. Everyone that has done it has claimed improved mileage. I'm considering asking about a group purchase thing for us mileage freaks... what do you think? #ad

Don't believe that the injectors are going to increse milage on a truck that is working to the best of it's potential. You are incresing the flow of fuel at idel and under load. think about how much the automatics waste in the T. C. lock up process. (Meaning the rpms that over-rev)It is true that the ECM is suposed to be smart and only give Boost and extra fuel at load, but remember that it is programed for stock injectors and you will be altering the formula. I have had 275's for 40K miles. and the milage went down from 22. 5mpg to 20. 5 highway.

 

[jponder]

Originally posted by jjdiesel:
jponder... . I'm for real,no fake. #ad
I am seriously thinking about it. I spoke with the owner of Fuel Preporator last week and he sent me some info on it. Check out the web site... if you're into the mileage thing like we are I think it is a very worthwhile investigation. Everyone that has done it has claimed improved mileage. I'm considering asking about a group purchase thing for us mileage freaks... what do you think? #ad

If i works I'm in but there are so many other things that I am surer of that I need first. I am game for anything that works



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2001 ETH/DEE ST 4X4 SPACE SHUTTLE

 

[Evan A. Beck]

The DD3's I put in my ETH gave me about . 5-1 mpg gain. Mileage is really consistent, about 21-22 combined city/highway driving. I have not yet taken the rig out for a steady day of highway driving since I put in the injectors. I expect around 24 or so. Testing will happen soon, as soon as it quits raining!

 

[Fred Swanson]

I have done several tests with the 275's, and now the DD2's. With and without fueling boxes.
Stock, consistent 16-18. 275's slightly better. DD2's no real change. There is more power throughout the RPM's, and the better mileage comes with normal(sane) driving, not hammering it all of the time.
All this changes when loaded, of course.


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Fred Swanson
Co-Owner
Canyon State Components, LLC
www.canyonstatecomponents.com

'00 QC,SB,4x4,Auto,3. 54 w/LSD,Trailer Package, Tow Package, DTT's VB & TC

 

[jponder]

Originally posted by Evan A. Beck:
The DD3's I put in my ETH gave me about . 5-1 mpg gain. Mileage is really consistent, about 21-22 combined city/highway driving. I have not yet taken the rig out for a steady day of highway driving since I put in the injectors. I expect around 24 or so. Testing will happen soon, as soon as it quits raining!

The ETH seems to put up substantially better numbers in mileage that other 24 valvers.



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2001 ETH/DEE ST 4X4 SPACE SHUTTLE

 

[TowPro]

Here's my take on it. The (stock) Injection of Fuel has been retarded to lower NOX output; this also lowers MPG and increases soot loading of our oil.

Note the 275 Injectors also have a bigger set of holes.

The pop off pressure, or the pressure that the 275 starts to inject and closes at, is lower then the stock injector. By opening and closing at a lower pressure, a little bit more fuel is allowed through the line for each injection cycle.

What happens is the 275 Injectors starts to inject sooner (advancing the timing some), injects more fuel per MS because of its bigger holes, and closes at a lower pressure, allowing a little bit more fuel through then the stock injectors.