Serge Tank!

[wht510]

As Scotty said, it's something that takes a bit of time to go through. I'll give it a very quick shot, as I've got a little time...

I'm running a 1.5L surge under the car. It's got a single Bosch 044 (definitely overkill) for the main pressure, and a Pierberg lift pumping into the surge. I'm running 5/8" hard line to the reg., and 3/8" return with a mix of Aeroflow fittings and EFI-Tech fuel hose/clamps. I'm running 204rwKw with 380Nm out of the SR20DET.

The Datsun isn't graced with the best in tank setup, hence the system i'm running.

The calculation you have to figure out is based on the Hp you are running and your application.

For drag, circuit, street, they are all different.

Mines setup for track (with legal street) so I will detail that.

A very basic rule is 400hp at engine = 2.1L/min requirement.

The Peirberg runs approx 1.9L/min into the surge. The 044 EASILY can supply 600hp+ at the engine (not the wheels)

I'm running less HP than that, so my capacity for the surge including topping up by the lift is approximately even. In other words, the requirement for the lift pump to match the consumption of the surge tank is equal if I had my foot flat for 100% of the time.

Now factor in corners:

If the corner goes for around 20 seconds (that's a long corner) I still have enough fuel even if the lift pump is sucking air.

If my lift pump dies, then I have approximately 1 minute of fuel at 400hp (which I don't have), so it would be a little longer.

[Ben C34]

If people wernt being dickheads with there smart ass remarks maybe I wouldn't have an attitude

Yep.

Nothing is your responsibility or fault.

[hardsteppa]

I had a dream last night where i spewed poo all over the walls while on the toilet and had to spend ages cleaning it off, so that was sleepy-time ruined. Then i woke up, and read this thread. Thanks very much 'jake', now my day's wrecked too.