Piper Single Undifferentiated or Other Model
Flight Crew Commercial; Flight Crew Instrument
Flight Crew Last 90 Days 15; Flight Crew Total 350; Flight Crew Type 60
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued Advisory / Alert; Flight Crew Returned To Clearance
Environment - Non Weather Related; Procedure
I was cleared for IFR departure at VNY; after having had three larger aircraft (business jets) cleared for departure before me.The controller reminded me about wake turbulence avoidance.  I made sure to lift-off in accordance with wake turbulence avoidance procedures.  While on initial climb-out; I picked a vector that should have been offset from the business jets; but I clearly chose incorrectly.I hit significant wake turbulence and focused 100% of my attention on keeping the aircraft from rolling over.When the controller from SoCal came on the radio to tell me I missed the turn to 210 and was south of where I should be; I was shocked and corrected immediately.I know I should have declined the clearance and asked for more time for wake turbulence avoidance; but I thought there had been enough time.  Clearly I was wrong; and lesson learned.I would also suggest that when controllers are clearing small planes for departure after larger jets; if there is to be a SID followed; that they wait some additional hold time.
Single-engine Piper pilot reported encountering wake turbulence in trail of a business jet departing VNY that resulted in a course deviation.