how do you determine what size blow off valve for blow-through or efi setup?
Thanks for sharing your knowledge Marty!Marty Staggs said: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.