I would like to upgrade the cam in my truck so it has the power a v8 truck deserves. It also needs to be able to pass emissions here in AZ. It is a 4x4 crewcab with stock size tires for now. I have modified the stock airbox and put on a large diameter single exhaust. I will also be installing headers and plan on a blackbear tune in May when they come to Phoenix.

 

Id go with a old man cam... comp cams has truck cams take a look at these two. 54-450-11 or 54-452-11. or if you want to go with a little more aggresive look at the 54-412-11. i think either of those would work well with your setup with a stock converter and a tune. you would also want to upgrade valve springs as well

 

all three of those cams will work great in your truck.

what kind of emissions test do you have to pass?

congrats on your first post. lol

 

In AZ it's just a quick OBDII check a well tuned vehicle will never fail even with no cats. I would suggest a 212/218 or 216/220 cam. Great power proven to work well without the aid of a stall.

 

Anyone of you know what the factory colorado cam specs are so I have something to compare to?

 

5.3= 191/190 .457/.466 114 lsa
You can also easily get a custom speced cam from a number of sources who can set you up with the perfect cam for your goals and build.

 

i agree with what gamble686 said... ive called comp cams a few times and talked to different people each time and each person specd out a different cam for my setup.... i have been searching for the "right" cam for about a month now and finally decided on one. call different sources and get cams specd out and take your time.

 

Cam specs on the 07+ 5.3 is 193/193 .480/.480 114LSA -3*

 

Okay I have started an email conversation with Trevor at Texas Speed. I want to make sure about VVT and AFM. I know the Colorado has VVT but I am not sure about AFM. Anyone know for sure whether or not this truck has it?

 

VVT is a cool feature! Adjust the valve timing so you can have power up top, and down low, Id keep that. AFM....get rid of it.