We have a few pure track 370's over here, mostly FI'd. Not heard about any fuel starvation. Two in particular, usually have blistering track times and overtake, anything and everything in front of them. So the cars are really being pushed hard, and thrown around.
One of the circuits has a few fast stretches and one severe, dropping hairpin, so a real test on a car:
http://www.hamptondowns.com/pages/65/circuit-map.htm