Okay I have a 08 ecsb 5.3 with headers intake and 4:11s. I'm going to see tootall in the end of January for the cam swap. I'll be running a 4k plus stall and 28 in tall tires. What to expect ?? I want high numbers and have searched everywhere on the internet and people say either good or bad things.? Anybody. Running q bug cam 5.3??

 

Not trying to get off subject here, but how do you like the 4.11s? any differnce in gas mileage?

 

Your fine but city went up and highway dropped down barely. And that's if you can keep your foot out of it. Way worth it though. Still low twentys highway

 

But performance wise its my favorite mod yet. Really woke the truck up. And went from 15.5 quarter to 14.9.

 

there's others that are running bigger cams than it.

The big key to running that big of a cam is the heads with a set of headers. Aftermarket heads are a must, or run a smaller cam

You'll more than likely need injectors unless your truck is not already a flex fuel.

 

What about the factory 243s? And no flex fuel?

 

What about the tsp 228? I wanna go big but with factory fuel system and the 243 heads.

 

243s are much better vs the regular 5.3 heads, but they still need to be ported to flow around 300cfm on the intake side . . . . PRC sells a 5.3 head that's ported - it's their stage 2.5 head.

flex fuel motors come with bigger than stock injectors

you could run a TSP 228 and keep the stock heads.

The best all around cam for the 5.3 and stock heads is still the 220/220 cam. Or 224/224

 

How much to get the heads ported?

 

http://www.proheads.com/ call this guy . . . ask about a core exchange

or

http://www.texas-speed.com/shop/item...id=84&catid=40

you looking for a head that will flow a little over 300cfm at .600 lift . . . or better