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Subaru EJ Recommended Injector Size by Horsepower

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Created by Brandyn Mowat on Apr 18, 2023

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If you’re going to run Flex Fuel it’s recommended to use the E85 Chart.

Base Fuel Pressure		Injector Size For Pump Gas
Bar	PSI	350	375	400	450	480	515	600	640	690
3*	43.5*	1050	1050	1050	1050	1300	1300	1300	1700	1700
3.5	50.8	1050	1050	1050	1050	1050	1300	1300	1300	1700
4	58	1050	1050	1050	1050	1050	1050	1300	1300	1300

Base Fuel Pressure		Injector Size For E85
Bar	PSI	350	375	400	450	480	515	600	640	690
3*	43.5*	1050	1050	1300	1300	1700	1700	1700	2600	2600
3.5	50.8	1050	1050	1050	1300	1300	1700	1700	1700	2600
4	58	1050	1050	1050	1300	1300	1300	1700	1700	1700

*3 Bar/43.5 PSI is stock fuel pressure

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