Advice on surge tank setup

[Partyvan]

Hi all

I have a K20a powered Honda CRX track car, with a standard fuel tank/pump. On hard left hand corners I get fuel surge.

I want to add a surge tank. My planned system is made using AN6 fittings where possible:

OEM pump > surge tank > Bosch 044 HP pump > filter > fuel rail > regulator > return line to surge tank

Questions:

1) The engine makes 270bhp N/A, would a small 1.5 litre tank do the job?
2) Most surge tanks have 4 ports, I can only see me needing 3... why is this?
3) Any tips or guidance in getting the setup right, or is it foolproof?

Thanks in advance

[GreenV8S]

I expect the extra ports would be to accept a return from the engine (so filling the surge tank in preference to the main tank) and an overflow to the main tank that also acts as an ait vent when the surge tank is filling. Remember this is a closed system so for fuel to come in, air must go out.

If you can arrange the filter upstream of the surge tank, that would protect your 044.

I've never used a fuel accumulator, but if there's any way to set up the petrol equivalent of an oil accumulator that would give you similar protection without the complexity of the additional pumps and pipes. I'm thinking of something like Accusump, but for fuel. I have no idea whether that's a thing.

[Partyvan]

Thankyou! A vent of course makes sense!

I can run a second fuel filter pre- HP pump

[stevieturbo]

Partyvan said:

Hi all

I have a K20a powered Honda CRX track car, with a standard fuel tank/pump. On hard left hand corners I get fuel surge.

I want to add a surge tank. My planned system is made using AN6 fittings where possible:

OEM pump > surge tank > Bosch 044 HP pump > filter > fuel rail > regulator > return line to surge tank

Questions:

1) The engine makes 270bhp N/A, would a small 1.5 litre tank do the job?
2) Most surge tanks have 4 ports, I can only see me needing 3... why is this?
3) Any tips or guidance in getting the setup right, or is it foolproof?

Thanks in advance

A 700hp capable pump, seems a poor choice for a 270hp engine. Select a more suitable pump.

Size of tank, depends what sort of duration you might spend at high g's or power that might empty it. IMO, 1.5 litre for such an engine sounds huge...but that could depend on shape/size of that 1.5 litre too. It could be good or bad.

Define what you mean by 4 ports ?

Typically a feed into it, return to main tank, return from engine, and supply to engine pump. That's 4. Some could use more, some could use less depending on configuration

Nothing is foolproof....as there really are some fools out there. And equally there are some terrible designs of tanks out there, and some very good ones.
For simplicity and tidiness, a tank that uses an in-tank pump has a lot of positives.