AC is very common. Fits IH T444E engines which were used in a zillion school busses all across the country. Plus commercial trucks, wreckers, etc. Won't find them at NAPA or a Ford dealership but if you look in the right places you'll find them coast to coast.

At one time that was an important factor in my future injector upgrade plans; when on the road pulling the 5er I could get the part pretty much anywhere. But then I realized that I can wait for a part since I have my rolling home. Down time is ok in that situation; it's a pleasure trip, not production or manufacturing where down time is anathema. Best to stick with a common setup tho, like 160/80 or whatever, so if your builder has gone the way of the dodo you can get a similar flow rate from another builder.

To OP: single shots are better than splits in every way except sound. And that's debatable. Yes you'll need tunes to run them, but you'll be getting tunes anyway.

 

{cracking knuckles}

160/100 Injectors link in my signature is worth a click and a read - as is the custom tunes link.

I chose to upgrade the air and fuel system and add gauges before I added bigger sticks. There is nothing wrong with doing cups alone and replacing the O-rings on the injectors until you can approach the injectors without the hurry. Once you've got all the seals "unstuck" to lift the valve covers, it's not a big deal to go back in a second time.

Consider the first round a lesson in what techniques to use and what tools to buy to make the second round much easier/faster. I've popped the VCs dozens of times, and I have it down to 5 minutes per side... it takes longer to prep the tools and clean up than it does to deal with the VCs.

This might be a good time to invest in a proper compression tester to determine if the engine is even worth adding power to. If you opt for the big sticks, then I strongly suggest using a stock-power tune until you get your gauges, fuel mods, and air mods in place.

 

Is there another way to contact P.I.S.? I've called multiple times and left messages, emailed them and sent them messages on their Facebook page with multiple responses.

 

Just got off the phone with Jim from rosewood injectors. Was highly advised to not use single shot injectors due to the extreme tuning difficulties. Even when using a reputable tuner like dp or power hungry I can expect to send my chip back and forth multiple times. He advised I go with stage 2 ad split shot with 80% nozzles.

 

I know Jim is a respected injector builder, but, that's just not the case.

 

I don't know what angle Jim is shooting here but this is completely false.

My truck runs great with single shots and I only got one set of tunes from gearhead.

It does idle a little rougher though. It shakes the cab at red lights a little more than stock injectors but that's why split shots were developed (as I understand it) - to smooth out the idle.

 

Finally got in touch with P.I.S. ordered a set of 160/80 single shot injectors.

Talked to Jody at dp tuner and ordered a F6 tuner with gauge and custom tunes. Jody was very helpful. I like that I don't have to get new tunes after I put the upgraded hpop or 38r turbo 6-8 months from now.

 

Did you go new or reman?

 

So here's the list of goodies I've gotten so far. Man this stuff is expensive.

160/80 injectors
DP F6 tuner custom tunes
5" exhaust straight piped
Donaldson AIS severe duty intake
John woods valve body
+8 deep trans pan
31 row cooler(already installed)
Injector cups
Valve cover gaskets
Valve cover harness
8 new glow plugs
Glow shift LCD gauges(pyro, trans, boost)
Aerotech obd2 scanner gauge

Is there anything else I should do while I'm working on it?

 

Reman. I'm too cheap for new injectors

 

With the OBD scanner and the 31 row cooler, I would skip the trans temp gauge and get a fuel pressure gauge instead.

 

I'm surprised Jim adviced against single shots?

 

I don't think there is a tuner out there that would recommend an edited (or upgraded) tune whenever an aftermarket HPOP or a 38R is added.

Stewart

 

It might be true depending on whose tunes/what tuner is being used.

Gearhead/PHP is the way to go IME.

I didn't catch that at first... you're right, that doesn't make much sense.

 

I gotta admit, I'm as surprised as the above that Jim stated singles were difficult to tune for, via email.

Are you sure he meant the AC's we're talking about, and not a more difficult stick to tune for, like a big hybrid single?

Stewart