Injector size converter

Convert injector flow between cc/min and lb/hr, and see how flow changes when you change fuel pressure.

Check the rating pressure

Injector flow is quoted at a test pressure, often 43.5 PSI (3 bar) or 58 PSI (4 bar). Use the pressure from your injector's data sheet as the rated pressure.

Converted

At rated pressure-cc/min

At rated pressure-lb/hr

Rated at-PSI

At new pressure-cc/min

At new pressure-lb/hr

New pressure-PSI

Flow change-vs rated

cc/min and lb/hr are converted at 10.5 cc/min per lb/hr, the same factor as our fuel injector calculator.

Flow at common fuel pressures

Your injector at other base pressures. The highlighted row is the rated pressure.

Pressure	PSI	cc/min	lb/hr	Change

Common injector sizes

Rated at 43.5 PSI (3 bar), and the same injector at 58 PSI (4 bar).

Size	lb/hr	cc/min at 58 PSI	lb/hr at 58 PSI
275 cc/min	26.2	318	30.2
310 cc/min	29.5	358	34.1
365 cc/min	34.7	421	40.1
440 cc/min	41.9	508	48.4
550 cc/min	52.4	635	60.5
650 cc/min	61.9	751	71.5
750 cc/min	71.4	866	82.4
850 cc/min	80.9	981	93.4
1000 cc/min	95.2	1155	109.9
1100 cc/min	104.7	1270	120.9
1200 cc/min	114.2	1386	131.9
1300 cc/min	123.8	1501	142.9
1650 cc/min	157.1	1905	181.4
2200 cc/min	209.4	2540	241.8

Need your injectors flow tested?

Boost Lab, Inc. ultrasonically cleans and flow tests injectors, with before and after test results for every set.

Start an injector service Fuel injector calculator Call 813-443-0531