Im building a high compression (11:1) d-series and plan on buying a chipped ecu, on their page it says to notify them if i plan on using injectors that arent stock. Now, i was thinking about getting a set of 440cc injectors but i wanna do more research on this to find out what would be best. Of course i emailed the seller and asked the same question but they never responded. My question is, with high comp should i use stock injectors, is 440cc too much?

 

No bigger than 440c on your NA d series. You would probably be fine with stock 240's. but upgrading probably wouldn't hurt seeing as aftermarket companies like RC injectors have a more ideal spray pattern than OEM.

IMO, go with either 310's, or 440's from RC.