OK help me on the 03 injectors

[hammersley]

I assume that the 03 injectors are "smart" injectors and VERY expensive to mess with - correct or not????

 

[nickleinonen]

the injectors themselves are not that smart, but the price is kinda high [i am guessing $100 usd per injector] the computer controlling the injectors is pretty smart. all the injector really has in it to make it different than older style injectors is a computer controlled magnetic orifice, that when open, allows fuel to flow through the injector body and out the nozzle tip. when closed, no fuel is going through. pulsing/modulating how the magnetic [or peizo electric if you want to get real into all of the workings... ] controls the injection timing [how early it is activated] and metering [how long it is open for] plus all the pilot injection stuff happens there too, but all computer controlled

 

[Casey Balvert]

Nick,



I am gonna guess you are WAY low on the price of the injectors. I don't even want to think about it in terms of Canadian money.



Casey

 

[John_M]

Nick,



I believe Casey is right. As I recall, the Duramax had some injector problems when it first appeared about 3 years ago. Those problems have now been solved but the guys were talking then about the injectors costing about $500. 00 usd, EACH. Of course, the replacement injectors were covered under warranty but the owners wanted to make certain all injector problems were quickly solved so they wouldn't have to replace a set after warranty.



I would imagine the injectors for the new Cummins will cost about the same. Hopefully, Cummins has learned from GM's experience and will have even fewer injector problems with their High Pressure Common Rail injectors. None of us wants to lay down $3,000 usd or $4,500 cd (frightening figures) for a new set of Cummins injectors at 78,000 miles.



Very clean fuel seems to be the answer for lift pump and injector durability in these new High Pressure Common Rail injector systems.



Best Wishes,



John_M

 

[Evan A. Beck]

Yeah, they are spendy, but not as bad as HEUI or Duramax injectors... The upside is we only have to buy six of them.



If you are not an expereinced diesel mechanic familiar with the HPCR system, do not mess with it. Not only are the injectors expensive, but the likelihood of damaging the parts is pretty high. There's some pretty fragile stuff in there.

 

[Bob4x4]

Nick you are off quite a bit on pricing and operation. The most important thing to remember is do not open any high pressure fitting on the HPCR system while it is running,when run wide open(controls Bypassed)this pump can put out in excess of 27000 psi at idle. Normal pressure at idle is about 5000. This system is self bleeding... no need to crack a Line to bleed. To find a bad cylinder turn the injector off with electronics do not crack a Line open.



Bob

 

[DIESELMAN]

On a typical injector, it is the incompressible fuel that pushes open the injector, when there is air in the line, you simply cannot produce enough pressure to force the injector open, and that is why you would need to 'crack' a line to bleed air and allow the line to fill with fuel. And why vane and inline pumps can cavitate when suddenly de-fueled leaving air in the lines that needs to be purged. There is no automatic method to do this.



Its just like a brake system.



On the new piezio and electrical fired injectors, the injector opens when commanded by the electronics wether there is pressure or not. This allows air to be bled out through the injector and lines and fuel rail, a self bleeding action. I believe this is also why our trucks crank a little longer before firing, the large volume of the rail and lines are need to be re-pressurized. ( and the electronics need to sense the crank speed, and so on and so on )



The new injectors are an electro-mechanical system, the old ones are purely mechanical.



And as for cracking an HPCR line, ever hear of subcutaneous injection? Wanna find out what it is?? How about a Diesel embolysm, which some of us already have!

 

[Garry Verheyden]

I heard Lawrence are Diesel Dynamics has improved the injectors for BIG horsepower and the core charge is somewhere around $2300 USD (that's just the core charge!) So these are definitely expensive injectors, nowhere near $100USD each. I don't know if they're available yet, but hopefully someone over at DD can let me know if I'm telling the truth or just rumors. What kind of HP are you getting from those injectors? I heard it is over 500rwhp!

(whith exhaust temps. at 1800 on the dyno with the stock turbo)

Garry.

 

[Steve G]

Originally posted by Garry Verheyden

I heard Lawrence are Diesel Dynamics has improved the injectors for BIG horsepower and the core charge is somewhere around $2300 USD (that's just the core charge!) So these are definitely expensive injectors, nowhere near $100USD each. I don't know if they're available yet, but hopefully someone over at DD can let me know if I'm telling the truth or just rumors. What kind of HP are you getting from those injectors? I heard it is over 500rwhp!

(whith exhaust temps. at 1800 on the dyno with the stock turbo)

Garry.

:--) I guess mine will be stock for a while.



Steve

 

[KLockliear]

Cores are very expensive. Like $450 EACH. So far, we are doing an exchange process with people that want them. We are offering 50hp/100# (Stage 1's), 75hp/150# (Stage 2's) and 100hp/200# (Stage 3's). EGT's are an issue with anything more than Stage 1's on a HO, with the airbox and turbo being a big restriction. As soon as AFE releases an airbox, we have turbo kits waiting to go too.



Lawrences truck makes ~400hp on #2 only, with just a set of Stage 3's and a turbo/airbox... no electronics. At one point, with a different set of injectors and a prototype box, we did see 563hp on #2 only.

 

[Garry Verheyden]

Thanks Kieth,

What is the smoke level like at idle and at full throttle with the stage 3s. I have the 300 injectors on my 12 valve and they don't smoke at idle, but have seen a lot of other extreme injectors that smoke all the time. I'm not too concerned with egt's since there is plenty of room under the hood of the 03's for twins.

Garry.

 

[KLockliear]

The nice thing about high fuel pressure is no smoke at any point.

 

[Garry Verheyden]

Thanks Kieth,

Thats the answer I was hoping for. So it is possible to have good power with little smoke now!

Garry.

 

[nickleinonen]

i guess i am living [or dreaming ] in my own lala land. i had no clue as to the price of injectors, so i guesstmated, and i guessed wrong. now i should have tacked a 0 on the end of my guess and called it canadian price, and it would be close [dealer prices maybe, or is that going to be $1500 CDN each stealer prices ]

 

[Garry Verheyden]

Nick,

I heard the price of the upgrade for the injectors is about $1000USD not including the core charge($2300 core). That is still about $26,295 when you convert it to our Canadian Pesos.

Garry.