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Old 08-27-2010, 03:02 PM
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Why injectors

I have a PHP 6 pos chip. Above the 100hp setting on stock injectors I get black smoke which seems to be unburnt fuel.

Yet it seems injectors are one of the first things people upgrade after intake exhaust chip. Wouldn't that be just more black smoke. Obviously they do add power, but seems like the next upgrade ought to be bigger turbo to clear up the smoke on say a 140hp tune.

Can somebody explain why someone should get injectors instead of a trubo and why they are able to make more power even though they were already not able to burn the fuel they had....

I ask because I have the three simple mods and am looking at what's next.
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Old 08-27-2010, 03:30 PM
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the injectors will only flow so much fuel.
the tunes you get when you buy a TS chip or whatever are basic tunes(from that particular tuner that is, all tuners are different, but most will equal out in the power/TQ department. Im not talking edge, or bully dog or banks here either.) for the specific vehicle and some light mods. No matter what anyone says. UNLESS you call up or talk to the tuner and say you want more power down low, or you added injectors and turbo and you need more fuel, timing, ect....

On a 140 HP tune, youre only gonna see about 80 HP. same goes for the 100 tune. the injectors simply dont have enough flow to support the volume of fuel desired.

Some people get performance injectors when they have injector problems, say after 150k miles or more. My Philosophy is why replace with stock, when aftermarket/performance stuff is basically same price, and gets you more power, or economy out of your truck.

You can de tune larger injectors(to a point) to run with a stock charger. that way, you can up the fuel amount once you get more air flowing. alot of people do that.
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Old 08-27-2010, 03:36 PM
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ok but if the injectors can't flow enough then why do you have black smoke?

I thought that meant fuel that wasn't burnt.
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Old 08-27-2010, 03:42 PM
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it is unburnt fuel, Most tuners tune to get the utmost out of any truck, because they are not tunig for YOUR specific truck. But, you would need more air to totally clean it up and most any aftermarket turbo will totally clean up a set of stock injectors. If you run a big turbo with stock injectors, you'll either burn it up or you will never get it to spool. If you run a big injector on a stock turbo, you will get alot of black smoke. Its kinda a tradeoff ya know?
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Old 08-27-2010, 04:56 PM
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so how about proformance injectors without any turbo?
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Old 08-27-2010, 08:55 PM
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this is perfect... i was just going to ask the same question! also why would you go injectors over a HPOP or visa verse? ima ramble on and someone letme know if im anywhere near the right directions... HPOP supply's high pressure oil to the injectors, the more oil pressure the more fuel pressure created, even with stock injectors. aftermarket injectors with stock nozzles are higher pressure but the stock nozzles limit flow? and stock injectors larger nozzles more flow less pressure???

i hope someone can help us out!
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Old 08-27-2010, 09:54 PM
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Ive been doing my own research on this matter for my 2003 Ex 7.3. And according to those in the know. The Single shot say stage I 160/30% which is what ill be getting. From what i understand its a more efficient injector than my stock inj...So it atomizes better, which means firing which means better MPG im told. But also when u romp on it youll notice a nice power differance especially with customs tunes. Ill need to confirm but i think the stage I also pulse at a differant rate than the stockers...Eitherway in my situation; when u couple it with a good turbo upgrade say like a d66 or the Precision billet turbo 7.3 1999.5-2003. Which seem to be a good choice among the seasoned consensus. Im leaning towards this one because its has nearly the same cfm as the d66 but it kicks in much harder with a faster spool up time im told...

And a bit of a side note but Precision Turbo i hear is winning lots of meets with there turbos.

Here is the link - If anyone has this turbo please share your experience
http://www.shop.blackwidowdiesel.com...ategoryId=62or garret gt38r turbo

Here is the d66
http://www.beansdieselperformance.co...d&productId=29

Last edited by BraveHeartCalif; 08-27-2010 at 10:05 PM.
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