Just to add to the questions from my previous post -> in my case the 2D will be used for road racing, not just occasional quick boost shots. So I am looking for the setup which will work best and most reliable - with lots of lateral Gs along the way

Setup suggestion. Tank, pump, switch assemble and relay in trunk. Check valve after perssure switch. Accumulator upfront place in a cool spot.
For racing use you will need a vertical tank. Something like a drag racing fuel cell. You should be able to get an 8x8 by 15" tall tank. The height of the tank is the most important part. If it is a large flat bottomed tank the pickup will on cover and get air into the system causing the water flow to stop. There is an second option to a tall tank if needed just let me know.
You can give me a call at 816-333-6582 if you need to.

Ok. Check your email :)