Fortuitous timing.... BBC posting today for Tractor Football in Devon.

The Vena Contracta on those Turbo’s must be sapping 5-10% on the available air intake, downing the power available. Get ol’Kenny-Boy to bung on some anodised Trumpets to smooth the airflow and conveniently improve the aesthetics... Oh, and it might sound better after that, but in reality, I doubt it will...