I run the same manifold with a school bus booster pump. Don't get the HF pump, when it heats up it will spin the center out of the rubber impeller. (ask me how I know)(not designed for hot water)
So you can only run 5 mins before it overheats, how long are these bracket races that you plan to be in? I am pretty sure I could run 5 mins without overheating (I run methanol), but I would run out of fuel 1st. seriously, I can't imagine it taking 5 mins of total run time to make a pass and get back to the pits.
How quick can you cool it down after it gets hot?
a couple of pumps
https://www.apartswarehouse.com/Product/Show/503/groco-booster-pump-12-inouthttp://www.jegs.com/i/JEGS-Performance-Products/555/50952/10002/-1Joe
