How do you determine VE of an engine?
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Joined: Apr 2001
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From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
I would assume a dynamometer??
In order to find the VE you have to know the torque and HP curve, as well as other things such as displacement, cam specs, etc. The only way to accurately do that is a dyno.
In order to find the VE you have to know the torque and HP curve, as well as other things such as displacement, cam specs, etc. The only way to accurately do that is a dyno.
Supreme Member
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Joined: Mar 2002
Posts: 1,728
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From: SE Michigan
Car: Bright Red 91 GTA
Engine: CARBED LT4
Transmission: MK6
DD2000 is highly accurate on all the measurements...Manifold Pressure, VE, IMEP,FMEP, and BMEP pressure...i dont know what they are but there measured lol
there power peaks are under perfect conditions but the curves are almost dead on
there power peaks are under perfect conditions but the curves are almost dead on
Joined: Apr 2000
Posts: 1,536
Likes: 322
From: South Windsor, CT
Car: '89 GTA
Engine: ZZ6TPI
Transmission: T56
Axle/Gears: Borg Warner 3.70:1
Volumetric Efficiency can't be meausreed by horsepower and torque. The equation is:
(Volumetric Flow of Air entering Engine)/(Displacement*RPM/2)
You would need a way to measure the incoming air, like a Mass Airflow Sensor. If you used a scanning software like Diacom, you can measure the mass airflow while running on the dyno, or at the track, convert that to volumetric airflow. Then calculate VE on different RPM points, and graph VE vs. RPM.
(Volumetric Flow of Air entering Engine)/(Displacement*RPM/2)
You would need a way to measure the incoming air, like a Mass Airflow Sensor. If you used a scanning software like Diacom, you can measure the mass airflow while running on the dyno, or at the track, convert that to volumetric airflow. Then calculate VE on different RPM points, and graph VE vs. RPM.
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