I have a 1989 iroc-z (5.0 with a 5-speed) and would like to know what kind of horsepower gains i would make if i switched my stock 19lb fuel injectors to 42lb fuel injectors. And also chipped it. Also could anyone tell what would be the best performance chip to purchase?
Thank You

 

larger injectors(especially that kind of jump) are worthless(and potentially detrimental) unless you're maxing them out... datalog it to see if they are reaching their limit, then make an educated decision as to how much bigger you might need to go.