Some of you may remember that I've been prepping my 250 for a Hydra. Now the question is, should I use single shot or double shot injectors?

Now I'm running a Hydra, staying in tow or stealth. The tech installed single shot 100% injectors. I'm wondering if that was the best choice. What do you think? I searched but found no thread discussing single vs double.

The truck goes like stink (fast). But the single shots are noisy as a womens march.
List of mods:

1) New HPOP from Ford
2) Wicked Wheel turbo
3) MAP sensor module defeat
4) New up pipes with no slip joint
5) Head bridge pipe for HPO system (across the vee)
6) Banks PowerElbow
7) Banks downpipe, 4" to the back
8) Edge console, EGT probe in exhaust manifold
9) Rebuilt trans with beef, oil cooler
10) Big Fuel mods (pickup, banjo bolts, filter check valve, etc)
11) 140v IDM mod

 

Who's tunes? Shouldn't be stinky if tuned right. They are a little bit noisy at idle. Also you need more turbo to clean them up. Don't think I would of put a stock HPOP in either, what type of gauges do you have? Need more information.

 

If I'm reading this right... "Goes like stink" means you like that it's much faster.

The noise of the injectors is unavoidable to some degree, but there are tuning tricks to keep the decibels down. I also discovered the Swamps 140 IDM does a pretty good job of altering the sound of single-shots. Single-shot idle can't get as quiet as the split shots, unless you make the truck stinky and smokey at idle.

 

The tunes and the injectors are from Rosewood. Stage-3 238 cc Hybrids with 100% over Nozzles.
I stuck with stock HPOP for reliability. I'm not building a hot rod, just a little more fun. And I don't want to have to spend $3k on a tranny soon.

Yep, goes like stink is a Good Thing. Throttle tip-in is snappy, without much smoke. I notice that stealth mode smokes more, and EGTs at idle are slightly higher too. Switch to noisier tow mode and EGTs go down as low as 235F.

So it sounds like single-shot injectors are better in every way but noise?

 

With those sticks and the Hydra at some point you will have to upgrade the transmission.


A tad more smoke as well.

Split shots are designed to lower noise and emissions, IIRC the 6.7 has four injection cycles.

 

It's subjective. The single shots can make the truck sound bad to some, or "bad ***" to others. Anybody who hears "Stinky" doesn't mistake him for an off-the-shelf 7.3L.

 

Funny, I'm getting to enjoy the sound. My X had the same cammy sound on overrun, slowing down, as the injectors began to fire randomly. Of course it was quieter overall. But then Ford reflashed it with CARB data, and it lost 2mpg and a lot of power. I've encouraged my friend who now owns my X to go Hydra.

There's one complicating factor right now. My PCM failed during Hydra install because one tech in the cab turned on the ignition while the other cleaned the PCM contacts. Ooops, it's out for rebuild and I'm running a loaner PCM that's from a 2001. ICP never drops below 750psi, so I get smoke at idle that should be reduced when my own PCM comes back.

 

How does that happen? If one guy is laying on the floor trying to clean the PCM board he'd be right underneath the feet of the other guy who turned on the ignition. My money says this is not what happened and you're getting smoke blown somewhere uncomfortable. Anybody who knows anything about "chipping" a 7.3l realizes that you cannot do a satisfactory job of cleaning with the PCM in the vehicle. It takes less time to do it the correct way and remove/disassemble it....and it's done right.

Also, 750 PSI at idle means that the injection control pressure sensor is unplugged or has a wiring issue. It's not the fault of an incorrect PCM in this case. Better have your techs figure that out too.

 

I'm wondering about this too. The latest flash from Ford for the 7.3L has nothing in it that would do this. Nothing really changed in a way that any customer would notice.

 

@RenoHuskerDu

Are you driving the truck around in Stealth mode? This mode is just for going through the Drive-thru, not for driving around. That would explain your hot EGTs in this mode.

 

So much question. Thanks y'all.

AAMOF, that was it. One guy switched on ign without telling the other guy who was on the floor cleaning with the metal scrubber Hydra provided (why, why, why metal?). First guy is getting fired for other sloppiness, not his first cockup.
ICP lowest reading is 750psi. Else readings are normal. Code thrown. Master tech says wrong year PCM is at fault. My PCM comes back all rebuilt and clean in a couple days...we'll see then.

I switched vehicles in that thread, my bad. The X I'm talking about that got reflashed in horror is my former vehicle. The reflashing happened in Commiefornia 10+ years ago. No telling what foolishness CARB does. Shops are required to stay logged into CARB and flash what CARB gives them. Best to drive over to NV and get your truck serviced.

No I don't drive in Stealth. But I tried that and from the sound of the injectors it seems to switch out of stealth at about 3% power delivery. I drive in Tow/Econ or Street. We're talking only about 5-10 degrees difference EGT at idle cooling down for shutoff. I like to get under 250F before shutting down. We'll see if I can even achieve that once summer TX heat hits...

 

Your truck will run the the same when you put the other pcm back in. The hydra chip overrides any programming on the pcm.

 

I'll post an update when I get mine back in. I used to get around 500psi at idle with my original PCM and no Hydra.

 

You would be able to run any E99-03 PCM (albeit some functions would not work correctly) and your ICP will not be messed up.

 

If your icp is at 750 right now at idle that is what your tune is calling for. You can try to get a new tune sent from whoever did the tuning. I bet if you unhooked the hyra your icp would chance but it would also idle poorly since you have single shot injectors and the factory tuning is for split shots.