# Volumetric efficiency and injector performance?

**URL:** <https://forum.realdash.net/t/volumetric-efficiency-and-injector-performance/302>\
**Category:** Help, tips and tricks\
**Created:** [January 10, 2020, 4:34am UTC](https://forum.realdash.net/t/volumetric-efficiency-and-injector-performance/302 "2020-01-10T04:34:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![CoTECH](https://forum.realdash.net/user_avatar/forum.realdash.net/cotech/32/8_2.png) [@CoTECH](https://forum.realdash.net/u/CoTECH)\
**Post date:** [January 10, 2020, 4:34am UTC](https://forum.realdash.net/t/volumetric-efficiency-and-injector-performance/302/1 "2020-01-10T04:34:03Z")

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I ask for help in the correct entry of values!  
My small gasoline engine.  
Atmospheric.  
Engine brand D4F  
Injector power system  
Type of engine in-line  
Engine displacement 1149 cm ³  
Number of cylinders 4  
Valves per cylinder 4  
Stroke 76.8 mm  
Cylinder diameter 69 mm  
Compression ratio 9.8  
Power 75 - 76  
Torque 105 - 107 Nm  
Environmental Standards Euro 4/5  
How can I calculate the injector performance, for how many cylinders should it be calculated?  
And how to calculate volumetric efficiency?