I am due for new Injector o-rings, as some may have seen in my previous thread.

Currently I am looking for more power. I use my Early 1999 F250 6-speed as a daily driver. Everyday I have to merge onto a 55mph highway during morning rush hour. In a car, this task is easy. In a 6 speed 7.3 Powerstroke, it's a little bit more difficult. I sometimes find myself waiting for a large enough gap or small enough car for up to 15 minutes.

Since I need new injector o-rings, is this a good enough excuse to buy larger injectors? I have over 315,000 miles on the truck.
If so, what size injectors do you guys suggest?

I will be installing a 6 position chip from PHP.

Thanks so much!

 

Great chip, but I heard he won't use your early 99 pcm. If he dose then buy injectors thur him. Stage 1's are nice. More power and better mpg so they say. You mit want to think about a new turbo if your going bigger injectors. Let us know what you do and how you like it.

Chet

 

I believe my injectors have leaky O-rings, I can hear them clacking, they have 1/4-million miles, and I have been on a tear to get more MPG since day one (with great success so far). I'd like to know this one as well (subscribing). I will be researching the differences between stage 1s and hybrids (on my list so far). I've heard the rumors of improved performance/MPG on injector upgrades, but I haven't read any numbers from the people who drive the rigs with these installed. Does anybody out there with upgraded injectors and improved fuel economy have a story to tell?

 

I love my Stage 1's, big difference. Just my 2 cents.

 

First let's find out the power goal and budget, then we can make better recommendations.

 

Budget is probably $2200-2500 for injectors and supporting modifications.

Horesepower goal is undetermined, I just need some more power!!

I have been looking at riffraffs Stage 2 injectors.
Are these injectors hybrids?

 

With talk of a chip and injectors, do you have Gauges, Intake, Exhaust?

Stage 1 injectors generally use stock nozzles but more fuel (165cc vs. 130cc on your stock injectors.). Stage 2 injectors generally bring the cc's up and also increase the nozzle size. Stage 3's are what is usually considered a hybrid injector. They flow more fuel (238-400cc's) with less oil as the plunger is out of a different injector (hence the hybrid name).

You may find by simply adding a chip you will have a whole different animal. Also I suggest making sure the truck is properly maintained and up to specifications. You may have an up-pipe leak that will cause it to feel sluggish. That has a big impact on the turbo spooling up.

 

As the others have said, throw a chip at it first... Give that a few months, may be all the power you need. Remember power breaks crap!

Beyond that, Stage 1's or AC's are what I would recommend in most trucks... Will work with everything nicely, and gives a good bit more HP.

 

The sequence I would take, if I had it to do over again (I went a little out of sequence):

1. Make absolutely certain there are zero exhaust leaks between the block and the turbo.
2. Find the means to make sure all your Exhaust Back Pressure and MAP sensors are working correctly.
3. More air in - 6637, similar, or AIS (I prefer AIS)
4. More air out - 4" exhaust from the turbo out.
5. Gauges - EGT, Transmission Temperature, and Boost at a minimum.
6. Chip. Everything else will give you a boost in power, but this is the real deal.

The preceding mods will take a bite out of your budget, but they were all I needed to see huge gains in torque, HP, and fuel economy. I put the injectors low on my list because I'm still running smooth.

 

I'm almost positive that there are no exhaust leaks, everything seems solid. How can I further check for leaks?

I have done the 6637 mod already, along with a short 4" turbo back exhaust that runs in front of the rear wheels.

I just ordered gauges today, also about to order the Over-Boost regulator from RiffRaff.

I also just put in a 450hp South Bend Clutch, Pressure Plate, and Flywheel.

 

Cool! Uh... you can disregard that TT... duh on my part. You're almost there. Chipping will get your undivided attention - you might even be temptet to taunt turbocharged Toyotas with titanic tailpipes.

As for the leaks: If you have no soot in the engine compartment, the Boost gauge will let you know if anything else is up.

 

Have you ever ridden in a tuned 7.3? You would be amazed at how it will wake your truck up. Have you checked the life of your HPOP? Switching to a late 99-03 set up would help you out too. TO check for boost leaks on the exhaust side get out a flash light crawl under the truck and see if you can spot any soot on the collector its hard to see, check the manifolds up-pipes etc. With stock tuning you should be around 15-17 psi boost