Variable Flow Turbocharger A/R (Area/Radius)EHFCVAugust 15, 2013Powertrain VFT (Variable Flow Turbocharger) Image: Honda A/R describes a geometric characteristic of all compressor and turbine housings. The turbine’s A/R ratio basically determines where the turbo starts to accelerate. # ICE Previous Post Active Roll Control Actuators Next Post NSX CONCEPT-GT Leave a ReplyCancel ReplyYou must be logged in to post a comment.