low 300's unaided, perhaps mid 300's....
My 600+bhp ibiza runs an S3 in tank pump, which delivers 3.3ltr/min no load as a boring factoid
To put what Bill said into context... the S3 pump fills a swirl tank that feeds a pair of Bosch 044 pumps... IIRC Bill calculated the swirl tank would potentially empty in around 45 seconds at full chat...
<tuffty/>