What size fuel injectors should I use in my Dakota?

Question

I have a 1995 Dodge Dakota with a 318, bored out .030, 9.5-1 compression, lightweight TRW pistons, balanced and weight matched Eagle rods, stock crank, balanced rolling assembly, Crane Compucam 2000 mild cam, 1.6 roller rockers, heavy valve springs, Mopar double roller timing chain with a spring-loaded slack adjuster, Mopar M1 intake manifold, soon to be getting a opened-up throttle body. its a 95 so it has the higher pressure fuel pump. It also has Pacesetter headers, dual 2-1/2 inch exhaust, Mopar Performance ECM, Accel coil, huge gauge champion truck spark plug wires, and double platinum plugs. My question is with all that nifty stuff, what size injectors should I use? I have been told the stockers are 19lb/hr, thats whats on it now, but I have been told the 24lb'ers are a good upgrade for those motors, but I have also been told that the 24's are only good up to 350 hp, or something. I figure maybe 30's, but I want a second opinion or two. Those things are not cheap. Any ideas?

Answer 1

Duration is not the only factor you have to consider when choosing fuel injectors. The amount of fuel delivered in that duration is the major factor. This is where the lb/hr figures come in to play. Seeing as how you are running 9.5 to 1 compression (obviously built to run on lower octane gasoline) , I would consider continuing to run the the stock fuel injectors. Your engine control module (ECM) should be more than up to the task of handling the modifications, as airflow should still be within the OEM parameters, even with a bored out TB. On another note, if you're having the TB opened up wider, make sure you get the intake matched to the new bore, and consider having the runners in the intake opened up as well. A bottle-necked induction system will in most cases perform worse than a stock setup.

Answer 2

Ok. let me see if you can grasp this.
It has nothing to do with the injector, it has to do with the amount of fuel is injectors spray, and that is controlled by the computor.
The computer turns the injector on and off. And controlls the amount of fuel it sprays.
So dont look at injector size but the time the injuctor is spraying.
So what you need is a new controll chip , not a bigger injoctor.

Seek out high proformance chips that will turn on the injuctor for a longer time thus supplying the needed fuel for your sporty Dakota.

Answer 3

Call your local speed shop! WE have a couple in the city I live, and those guys are really knowledgeable about performance parts

Answer 4

call auto zone