I'm prepping to upgrade. Got a Greddy FMIC, HKS downpipe, HKS intakes, Bonez Hi-flow cat, Apexi N1 catback and Power FC all going in at the same time. Also just picked up a set of 99spec turbos. Already figured on a fuel pump, but will I need bigger injectors too? If so, how big? Where can I get info on how to calculate this?

 

If that is all you are doing, the stock injectors can handle it. If you are doing more down the road, you will need more fuel.

 

yeah, I'd think the stock injectors will be fine. but it may depend on how much boost you'll be running. you don't want the injector duty cycle to be maxed out all the time.