Our setup in the drivers side of the tank not only sends typical surgecan overflow back to the stock pump, but also pulls fuel in from underneath the can on the drivers side, to increase overflow volume and assist the stock fuel pump in recovering fuel to the passenger side more quickly.
the limits are
TBD... its very possible that the stock pump will rarely starve at all with this configuration. Its just that testing something like this is so dynamic that it is almost impossible to bench test every scenario. Ultimately, they just need some miles on them to determine where they stand. Only time is really going to show how long the stock pump survives when racing at low tank levels, based on how well our product is helping it recover fuel. Hell I say the product needs more testing just to make sure it reliably gets cars down the street without hiccups! But I think its going to be a success.