Size it based off of boost pressure and HP.
BIG boost = larger BOV. Its purpose it to vent the charge when you lift (mainly after a burnout) and save wear/tear on the turbo.
On a road race car, it REALLY helps keeping the turbo spinning between shifts.
BIG boost = larger BOV. Its purpose it to vent the charge when you lift (mainly after a burnout) and save wear/tear on the turbo.
On a road race car, it REALLY helps keeping the turbo spinning between shifts.