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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 11-09-2010, 09:04 PM
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Default upgraded fuel injectors?

okay so i want to upgrade to bigger fuel injectors. stock is 19 lb? airram has 19, 21, 26, and 30 lb injectors. i wont have a heavily modded engine. im just going to have CAI, gutted cat, and already have flowmaster exhaust after cat. ill be running a flashpaq with the setup and maybe an upgraded fuel pump. but back to the question, which injectors would be best?
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Old 11-10-2010, 02:30 PM
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over the next few, i'm going to upgrade to the factory 4.7 flex fuel injectors. opened up enough for some gains but not too much for stock innerds...
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Old 11-10-2010, 02:33 PM
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I honestly don't know that you'll see much of a gain with bigger injectors unless you plan on doing a cam swap.
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Old 11-11-2010, 11:59 AM
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05atlanticblue thats interesting are they bigger than our stock injectors? and ramtech i know it there wont be impressive gains if any but since im going to get new ones for a full tune up of my engine i figured i might as well go a little bigger. but thanks for the input guys!
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Old 11-11-2010, 12:08 PM
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Replacing injectors isn't part of any type of routine maintainence. You'd likely do more good by replacing your upstream O2 sensors if they're original or more than 5 years old because they do get sluggish over time. Potential benefits are better performance and fuel economy.
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Old 11-11-2010, 02:18 PM
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Stock injector are plenty for nicely moded motor. The main concern is that they all flow the same or as close as possible to each other.
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Old 11-12-2010, 12:07 PM
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i trust you since you are a chrysler technician lol. but i have been having fuel problems thats why im gutting my clogged cat today. also doing as compression test to find out why im losing coolant so much
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Old 11-12-2010, 12:39 PM
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You probably have a blown head gasket is why your losing coolant.

What do you mean your having fuel problems. What are the symptoms that are making you think its fuel.

As for the cat. Why not just replace it with the money you were gonna use on injectors.
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Old 11-12-2010, 11:18 PM
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Your better off with the factory rated injectors . You won't achive anything other than a lot of heartache from them . The 4.7 can only burn so much fuel .
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Old 11-13-2010, 02:13 AM
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well compression test was good. all were above 130... but we diagnosed it to being blown head and the coolant is leaking into the exhaust and engine. found coolant in oil also... anyone have any good ideas on where to get good heads? and if i do heads how much more would i be getting into if i wanted to throw a HO cam in there? honestly if im tearing the top end apart im buying a winter beater and dumping good cash into making my engine throw some horses
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