I will be needing to replace the injectors and wanted to check with the best Ford guys first.
What are the best injectors for longevity, mpg and power?
I have a 1999 F-350 with the 7.3 diesel. The truck now has 415,000 miles and the engine and transmission have never been worked on. I use as a daily driver and hauling loads around the lower 48.
Thanks

 

Maybe some info about your truck would be helpful. You can’t just throw different injectors in any truck and expect more power mpg and expect it to run right gas or diesel.

 

Sorry about that, I updated my post with the information.

 

I can't believe that no one has any input on injectors!

 

Yeah, I know how that feels. But my take is that most are probably not sure where you are wanting to go with your truck as far as the performance. What are you looking for? What are your objectives after the new injector install? Based on your past history, and if you are looking to continue using as you have, I wouldn't change a thing. I would just go back with some good quality stock new injectors. Or may be able to save a little money by having yours rebuilt or purchasing rebuilt injectors.

Blue

 

Well I'm no expert, but for the amount of miles on the motor and transmission, I wouldn't go too big. I would either go with a 160/80 or a 160/0. The first number is how many cc's of fuel the injector can flow. The 2nd number is the size of the nozzle on the injector. A 160/80 can flow 160cc's of fuel and has an 80% bigger nozzle than stock. A 160/0 flows 160cc's of fuel, but has a stock size nozzle. Either one offers a very noticeable power increase over stock injectors. That being said, if you romp on it too hard with the bigger injectors, you'll probably be buying a new transmission. The 160/80 make more power than the 160/0, but to get the full power from either injector, supporting mods would be a good idea. If all you want to do is throw some injectors in and drive, I'd go with 160/0. Hopefully someone who has actual experience with bigger injectors will chime in to help.

 

Your questions are a bit vague, which is why the lack of response. Plus you'd probably get more input if this were in the 7.3L section.

That being said, longevity/mpg/power are all subjective. The more power you go with, the less longevity you're going to see out of powertrain components such as the transmission.

For a bone stock truck the most common answer you'll get is to throw in a set of stock AC code single shot injectors. It will require you to run a tune at all times since you will be going from split shot to single shot injectors (single shots don't run well on split shot tuning, and vice versa).

Single shot AC's have the capability of giving you a bit more power with slightly better mpg's than stock AD splits, and since they aren't modified injectors they can be easily tuned by just about anyone. But now you're also looking at intake, exhaust, possibly turbo, and even transmission modifications to reliably handle the power and control the EGT's (if you're wanting to utilize that extra power properly). If you don't want to utilize the extra power, AC's can still be tuned to bone stock power, and that will maximize your mpg's and longevity.

Plus, what's your budget? That's always a big factor. Once you go down that rabbit hole things can add up quick. These trucks are actually kind of expensive to modify, especially when you start factoring in things like the transmission - considered the weakest link when adding power.

Be more specific on your goals and budget, and the fine folks here can steer you right.