how much extra hp will 5x.018 injectors give me in a stock pump?

 

dumb question! those injectors on what im guessing is a very close to stock truck will make a smokey hot mess on 4 wheels and probably lose you power. what else is done to your truck. put some 4k gov springs in it if you havent already. way better than 5x.018's on an unmodded truck

 

my truck now has a 4k gsk and a #5 fuel plate but i want i want 250 more hp so what size injectors do i need?

 

you are not going to get a huge jump in power with just injectors. example 100 HP injectors are not going to give you 100 hp on a stock truck. if you use your truck as a truck i recommend 5x.012's or 14's. these to can get smokey at times expecially the 14's if you dont watch it. without a bigger turbo you do not want to go bigger than that. fill out your sig and tell us what your intent is with your truck.

 

i want at least 500 hp and its pump around 255 first thing first tranny? them turbo? then horsepower? whats the best thing to get for each of these to run 500hp?

 

500 is pretty easy to get much over that and you seem to break crap ALL the time. but to answer your question.

4ks, fuel plate, smaller set of injectors. good intake and exhaust, get your pump turned up and timing set a little higher. possibly DV's however stock ones will get you there, personal preference along with the injectors and fuel plate, a bigger turbo, not huge by all means but you need a bigger one.

insurance- valve springs, head studs, o-ring or fire-ring your head

that will get you there if you plan on much more than 500 buy a turbo you can use as your small one when you upgrade to a twin set-up.

 

ok the timing has been advanced its got a 4k gsk and a number 5 fuel plate so what size injectors and where is the best place to get them?

 

12's or 14's depending on what you do with the truck. 14's if you hot-rod morethan you pull. preference, i like my sdx's never had a problem. get what you want whoever tickles your fancy. def recommend 145* spray angle. makes things cleaner, 155* are for marine aps.