Hello guys, and girls lol! Ive added exhaust to my 05 tahoe swapped the front end to 06 HD, lowered it, and in the progress of the stereo system.

Im planniing on adding headers to this set up, at what point would one suggest I get a bigger set of injectors and what kind/prices?

 

Headers alone shouldn't warrant larger injectors, but honestly it depends. If you're staying above 90% IDC it's time to start looking

 

when injector duty cycle is above 85%

without at least a cam youre not anywhere close

 

80% duty cycle. much over that is pushin the injectors to their max

 

I'm at 97% duty cycle on my stockers with mods in sig... there were no lean issues at wot, but I need a set before I do anything else

 

I have a question related to this. Say the OP did get bigger injectors, would that cause any issues if they were not needed? Lets just say 42# injectors were used.

 

Assuming they were tuned properly, nothing. It might not idle as smooth, but I doubt you would notice.

 

Thanks, was just something that had me curious for a while now.

 

You wont have any issues wirh those mods.

 

How do you test the IDC? I will be doint a cam soon with possibly headers and intake... what are some other cheap mods that can be done to these 5.3s?