is the hood sealed to the core support ? that will maximize the air going through the radiator opening instead of just "spilling over" the top of the support.
are your electric fans aftermarket, or some type of OEM ? if aftermarket, i have found them to be optimistic at best on amount of airflow. i ONLY use OEM fans in EVERY electric fan application. they are far and above ANY aftermarket fan made. be warned, however, they require many amps to operate, so an upgraded electrical system is a must.
they also consider high speed airflow, so their shrouds are designed for airflow at speed, while the aftermarket fans and shrouds are not.
lastly, puller fans are way more efficient than pusher fans.
please keep us updated.