December 5, 2007Can someone explain to me the difference between the stock injectors on a 03 7.3 and performance injectors? Do performance injectors increase gas mileage? And possibly point me in the right direction for new ones.
Forums : Engines-Diesel : Performance injectors (45 Views)
December 5, 2007allows for more fuel adding hp... not going to help MPG
December 6, 2007I've heard that there are some out there that do increase fuel mileage. Check out Dynomite Diesel or BD Power for aftermarket ones. Those are the two that I've heard the most about around where I live. But they're like $2500 and up for all eight injectors.
December 8, 2007There are actually quite a few aftermarket injectors for the 7.3 and 6.0. It is actually possible to increase mileage in some situations but not otheres. What motor does your truck have and what mods do you have?
December 8, 2007My bad i just re-read where you said 03 7.3. Your truck came factory w/ AD code split shot injectors. These are good for low noise and low emissions, but mileage and power due to increased hpop oil consumption suffer. With an 03 you will want to be careful w/ the tuning and power output and most importantly cylinder pressures as your motor has powdered metal rods..which are not as strong as the forged metal rods in the 94-early01 production motors. What are you looking for in a set of injectors?
December 8, 2007well i have two injectors that are going out/ showing fault codes. So i was wondering if it would be worth upgrading to a better and possibly more hp injector. i pull a lot of trailers, heavy ones at that. so im workin on upgrading my truck to get better mpg and more pwer/torque. so i have a cold air intake, bully dog power pup chip that i got with the truck, exhaust, torque converter, and got my tranny rebuilt and supposedly beefed up to make it work better while towing when i put the converter in
December 9, 2007For your application i think a set of AC code aliant replacements would work well. We have a few customers w/ those and they are extremely happy w/ the performance over stock injectors. They really shine when it comes to towing and mileage. Also, they are the same price as a set of stock replacements for your truck. I see youre in Bryan, i spent 4 years in college station going to A&M and now just down the road in San Antonio. If you want you can give me a call at the shop and i can explain the injectors a little better so you can make a very well informed decision.
Truck Source Diesel
210 654 6767
December 9, 2007BIG SMOKEY said it best..
AC injectors are probably going to be your best bet... IIRC they flow 160cc fuel, but because they are a single shot, not split shots like your factory AD 140cc injectors, they can easily flow more fuel while using the same amount of HPO...
You will require special tuning to run single shot injectors....
If you are planning on running a larger turbo, then AC injectors with upgraded nozzles are probably a good choice then too....
Good luck!!! let us know what you choose
December 10, 2007im still here at A&M its and probably will be here a bit longer. havin a little too much fun.
why do the single shot require special tuning and not the multi shot injectors?
also would a higher horsepower injector be something for me to consider since i do plan on upgrading the turbo?
a little background, i pull a lot of heavy trailers over 15k upto about 30k
December 11, 2007Most of the upgraded drop in turbos such as the Garrett Ball Bearing GTP38r will run fine with stock injectors, but can also handle upwards of 400-450 hp efficiently or even over 500 if pushed with a TON of fuel or a little NOS. For towing, you wont want to go huge on the injectors and atomization will be essential to keep EGTs down and mileage up. The AC code injectors are still an "A" code injector insuch it has a 7:1 hydraulic ratio for fuel:oil. This means they are capable upwards of 20-21k psi of injection pressure, where as a B-code injector or hybrid are capable of 15k-18k psi of injection pressure. The AC code injectors are single shot, meaning they displace their entire capacity of fuel in one shot, instead of a slight "pre-shot" then the main shot as the AB and AD code injectors have. The reason for the split shot, which your truck has currently, is to lower sound as well as emissions.
The special programming is needed for the single shots because your factory ecm tune is made for split shot injectors. The truck will run without a change in programming, but idle will tend to be a little choppy as well as vary in rpm, and throttle response will be a little awkward. We make these changes via a 4 bank chip in the fuel, icp, and timing tables to produce a smooth idle and smooth throttle response.
The idea behind the AC code injectors is they are a single shot A code injector which allows them to displace more fuel per amount of oil used, but still keep nozzle pressures up. They are a great match for towing/daily driving because they are still tame enough to keep reasonable EGT and mileage typically is improved w/ them due to the increased efficiency. 370rwhp give or take is the norm for these, which make them safe for a Powdered metal rod motor, (found in the late 01-03 7.3s), but be a good feel over stock. Hope this helps shed some light on things, if you have any other questions feel free to ask.