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Surge Tanks

r_speedfreak_r
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r_speedfreak_r Proficient

r_speedfreak_r

Posted
Posted

Hey all

Got a quick question for you, yes i know another one lol.

I'm planning on getting a surge tank made up once my engine is built to avoid loosing fuel pressure on track days as i have done in the past. i've been told you need a lift pump but instead of getting a small lift pump can i get a second high performance external pump to use instead? I've only got a bosch 040 fitted in the tank atm and id hate to build up my engine and find out on the dyno that i cant flow enough fuel. Would a big external pump work or am i better off replacing the internal pump with a 044 & buy a lift pump?

If it helps im wanting about 300rwkw. Anything over that ill have to upgrade my clutch lol

Cheers

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R334door Experienced

R334door

Posted
Posted
Hey all

Got a quick question for you, yes i know another one lol.

I'm planning on getting a surge tank made up once my engine is built to avoid loosing fuel pressure on track days as i have done in the past. i've been told you need a lift pump but instead of getting a small lift pump can i get a second high performance external pump to use instead? I've only got a bosch 040 fitted in the tank atm and id hate to build up my engine and find out on the dyno that i cant flow enough fuel. Would a big external pump work or am i better off replacing the internal pump with a 044 & buy a lift pump?

If it helps im wanting about 300rwkw. Anything over that ill have to upgrade my clutch lol

Cheers

I would incorporate your standard pump just to fill your surge tank and use your o4o.The 040 are capable of flowing enough fuel for your 300kw.

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https://www.sau.com.au/forums/topic/161082-surge-tanks/#findComment-2990911
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shanef Grand Master

shanef

Posted
Posted
Hey all

Got a quick question for you, yes i know another one lol.

I'm planning on getting a surge tank made up once my engine is built to avoid loosing fuel pressure on track days as i have done in the past. i've been told you need a lift pump but instead of getting a small lift pump can i get a second high performance external pump to use instead? I've only got a bosch 040 fitted in the tank atm and id hate to build up my engine and find out on the dyno that i cant flow enough fuel. Would a big external pump work or am i better off replacing the internal pump with a 044 & buy a lift pump?

If it helps im wanting about 300rwkw. Anything over that ill have to upgrade my clutch lol

Cheers

you'll find as soon as u add an external pump that feeds from the surge tank to ur fuel rail, the intank pump will be able to flow more, as it isnt under as much pressure. i.e all it needs to do is fill ur surge tank.

for ease, i'd leave the 040 intank and get an 044 external with ur surge tank :mellow:

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https://www.sau.com.au/forums/topic/161082-surge-tanks/#findComment-2990986
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dangerous_daveo Grand Master

dangerous_daveo

Posted
Posted

Didnt we just have a thread on this about posting stuff in the right section!?

As this should be moved I'll still put my bit in. If your getting a surge tank, at least get a decent sized one, something 1L or so isnt really all that much worth it. Its like getting a 1000L water tank, its pointless. Get something decent, its not going to cost you that much more, and bigger shinny stuff is cool.

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NFAA32 Rising Star

NFAA32

Posted
Posted

what you recommend as the optimum size dave?

as i am thinking aboutgetting one for my car.

as far as i know i have an internal fuel pump. and an external one that is located outside the tank under the car (cant make out markings etc).

so pretty much i will use these two pump (as there obviously doing the job atm). and just re position the external.

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https://www.sau.com.au/forums/topic/161082-surge-tanks/#findComment-2993917
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r33_racer Grand Master

r33_racer

Posted
Posted

why does the size matter? At full throttle can your car drain a 1l tank before it can contiually be topped up? Common surge tanks are only 1-2L. You start making them too big it will take longer to keep it filled and you might start suffering from surge in that one. Not only that, it will start taking up more space then you would like.

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femno Grand Master

femno

Posted
Posted

Just use your intank pump to fill the surge. Then run an 044 out the surge and to the rail. Easy as that.

Ive got one for sale; see my sig link.

If you connect your intank and external in series you will get fuel airation because the intank cant flow as much as the external, so the external draws a vacuum if you like -> leanout. Thats why you need a surge for the external to feed from.

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