i'm thinking about picking up a set of used Denso 720cc Injectors and i was wondering if they would be sufficient for the upcoming mods i plan to get. i would just hate to pick up these injectors and end up needing 1000cc injectors instead.

mods right now:
Greddy Competition Ti-C Turboback Exhaust
GSC S1 Cams
Invidia o2 Housing
AMS FMIC
APS Twin Vent BOV
Hallman MBC (22-23 psi)
Injen Intake w/ Intercooler Piping
Walbro 255 Fuel Pump
ARP Headstuds

upcoming mods:
BBK Full
Snow Performance Meth Kit
raise boost to 28-30 psi

 

If it was me, I would just go larger right off the bat. Especially since you haven't yet purchased those 720's. Just get some 880's or 1000's and call it a day.

The 720's would be too small for the BBK on straight pump. They would be marginal at best with the BBK and Meth. Chad used to recommend 780's for the BBK on pump. But, nowadays everyone is running bigger. So, you might as well do 880's or 1000's IMO.

If you have two switchable maps, that is, a pump map and an Alky map, then the 720's would not provide enough fuel for your pump gas map.

EDIT: Incidentally, it seems that the Denso 720's flow more like a 680 cc injector, eventhough they are advertised as 720's. I'd say go larger!

 

I would go with Injector Dynamics 1000's. Best Injectors IMO. they cost around $500 and will have stock driveability. But no q16 with them. e85 is the way to go though. Pump gas is fine too. If you dont wanna spend the money on those next best thing i would do would be Precision 1000's.

 

okay thanks for the input guys! bigger injectors it is!