this is what i want to ask because i cant find a answer anywhere i was wondering how big of a cam can i go before changing injector or a fuel pump. i was looking at buying the thunder racing cam the tr220 but just dont know what to do... because i drive this truck year round but i dont want to nasty of cam. please i ask for info and as much as possible.

 

You're going to have to replace valve springs with any cam you swap in, so whats the big problem with doing injectors too? They're easier than valve springs.

Also what other mods do you have, what motor, what color is the truck, is it a regular cab, is it even a chevy?

You gave us no info at all about your truck

 

yeah i got the valve springs already. see this is the thing im trying to piece together this truck on low fund and broke man parts.

 

Still no info on truck...

 

its 5.3 stock now got i have a 4.10 gear and long tubes and 3200 conveter for it.

 

TR220 should be fine then. Who's tuning it?

 

this is what im asking is the stock injectors going to flow enough?

 

It will be close. I bet it will be in the 9x% range depending on the tune

 

now this is the thing i want to spray it a 150 shot.. injectors or pump.

 

Spray a 150 wet shot and don't worry about it. Stock fuel pump will be fine, injectors will be close.