How do I know hw big of injector I need?

[RedTopDrifter01]

Hello does anyone know how big of an injector I should buy I am looking to make about 320hp to the ground when I'm done and I don't really know what size of injector I should use?

[VNG704]

about 50# msd injectors or 550cc nismo, tomei, etc... search button.

[RedTopDrifter01]

What the hell does that mean I just don't know what size I should use and I've got a chance to get a set of denso 500cc high independence that will work for my car but how would I know if that's to big I already have a walbro 255 pump and turbosmart adjustable fpr.

[aled]

S15 (480cc) should do.
As long as you tune for proper fuel pressure, you'll be just fine.

[Couped_up'd]

350cc/33.3lbs Would be 80% duty cycle for a target of 320 hp, on a rb series motor.

[UNISA JECS]

You need about 4 580cc injectors to support 320whp at 80% duty cycle.

[R33E8]

Just get 7xx or 8xx cc injectors and not worry about it.. You'll have room to get more power later.. Btw, to figure out how big your injectors should be search google for a "bsfc calculator"..