Fuel injectors

Flow

Manufacturer	Injector	2 bar	3 bar	3.5 bar	4 bar	5 bar	Spray pattern
Bosch	S4				349cc/33#	390cc/37#
	Bluetop 36#		380cc/36#		422cc/40#	490cc/47#
	RS4				480cc/46#	538cc/51#	Dual cone 15 degree
	Green Top "42#"		440cc/42#		528cc/50#	568cc/54#	Dribbly pencil
	Green Giant "42#"		430cc/41#		500cc/48#		Dual cone 15 degree
Delphi	37#		391cc/37#		462cc/43#
	38#		399cc/38#		462cc/44#
	42#		441cc/42#		515cc/49#
	50#		525cc/50#		609cc/58#
Siemens	Deka 55# (3172)*		599cc/57#				Narrow cone
	Deka 60#	514cc/49#	630cc/60#				Wide cone
Genesis	415cc		415cc/39#		483cc/46#		Dual cone
	430cc		430cc/41#		494cc/47#		Dual cone
	550cc		550cc/52#	580cc/55#	635cc/60#		Dual cone

Conversions

• 1lb/hr = 10.5cc/min

• $Flow_{new}={\sqrt {\frac {P_{new}}{P_{old}}}}Flow_{old}$

References

• http://usrallyteam.com/injectors.html - Genesis
• http://racetronix.com/ - Delphi and Siemens
• http://www.fiveomotorsport.com/Injector_SetsMODS.asp - All others
• http://forums.audiworld.com/s4/msgs/2091797.phtml - Flow comparison vs. stock.