AE, AC, AD, AA..What the he!! does it all mean!!?? Can somebody out there write a clear, concise explanation as to where each of these is used, I mean what applications they are good for and why would a person would want one over the other. Are any/all intechangeable with a OBS truck? Would a OBS guy/girl gain anthing with one or the other? And while they are at it, what about single shot and double shot injectors? Are they one of these A* models? The whole thing gives me headache just thinking about it.

Reek

 

Ok here goes

AA- 94.5-97 federal emissions PSD, single shot, rated around 90cc of fuel (I think thats 1000 cycles its not one shot)

AB- 96 and 97 California emissions and early 99 Federal, split shots, rated at about 120cc

AC- Used in International truck apps. They are pretty much stage 1's (160cc, I think)

AD- late 99-03 PSD, Split shots rated at 140cc

AE- used with AD's in the number 8 hole as a cackle (noise) cure. Commonly called a long lead injector

AO- newer replacement for AA's, I don't know anything about these really.

Single Shot verses Split shot- Single shots are just that when they open they injector on shot of fuel. Splits have whats called a pilot shot. Its a small injection of fuel just before the main injection. Its descreases noise and helps with emissions

They can be interchanged somewhat. The AA, AC, and AO's are all interchangeable as they are all single shot. AD's can be used in OBS truck and can run on single shot programming though they will run better on Split shot programming. AE's should only be used in the number 8 hole when AD's are installed. Single shots provide better power and mileage becuase that pilot shot isn't "wasted". Single shots can't be run in the superduties without a custom chip because the single won't run on the split shot programming.

Also split shots require more High pressure oil so they tax you HPOP more than singles.

Pretty much across the board if you change injectors you won't see any gains without having a ship burned to match them.

 

Thank you TJBeggs. So does the part number determine what kind of injector it is? For instance, does 4C3Z-9E527-AA mean that it is a AA injector? Why arent the international ones (AC's) interchangable in our OBS trucks? Why wont more power be seen with just the injector change? Is it because the computer controls the injection timing so without changing the program nothing Else changes? Reek

 

I don't know about part numbers. I don't think that is the case but I could be mistaken. The AA,AB... are all on the injector soleniod. that is the best way to tell them apart unless somebody has switched the soleniod.

The AC's can be used in our trucks.

And as far as power it is the computer that controls injection timing and pulse width (the amount of time the injector is injecting). As long as the injector has the same size nozzle without programming changes the same amount of fuel is being injected. Now I don't know if that is exactly true if you went from single to splits on the same programming as the pilot shot may change that some.

 

So where is the best, most dependable, reasonably priced place to buy replacement injectors?

 

Well I don't really know. If you are wanting a whole set, ebay has some good prices but I don't know about their quality, also Beans and DIY sell reman and or rebuild kits. I believe the only place I have seen AC's is new from IH $$$$$. AD's are on ebay everywhere and I might have a set for sale soon!!! (as he smiles and waits for the box to come in the mail and searches for DIY-injectors.com!)

It depends on what your budget and which injectors you want to go with for the most part.

 

Are all the 2003 and later super duty injectors double shot? Better yet, Are all the injectors after our OBS's double shot?

 

Yes all 99-03 injectors, both AB and AD's are split shot as well as 96 and 97 OBS (AB's) california emissions models.

 

How about up till now?

 

up till now you mean the 6.0 and the 6.4? they use different injectors. The 6.0 uses the same type (HEUI) but they are physically different and I have no idea how much they flow. The 6.4 uses common rail injectors which are completely different. Much like a gasser injector but at 20,000 psi as opposed to 50 psi.

 

tj you realy know all great post some good info

 

Very nice Tim, very nice.

 

Thanks guys. But I certainly don't know all! just ask my wife!

 

haha wow and i thought there were only 3 types of injectors

 

I know...Who'd a thunk?