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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: surge tanks: a few questions.
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Fri, 11 March 2005 00:15
 
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i dont remember who exactly it was i was speaking to who was witness to some tests performed on the dyno with different fuel temperatures.
Basically the result was that on the street and on the dyno, you will never reach a problem with fuel temperatures that are worthwile considering cooling your fuel supply or changing the design of your fuel system.
Now... i'll be nice  When you have a look at the pimp on the weekend eddie you will see how i have done my fuel system. Visual inspection is much easier to follow, and i have proven this fuel system to work VERY reliably and never surge, have heat issues etc.
I use an old primus gas cylinder with fittings braised onto it. I think volume is around 1-1.5L from memory.... big enough for when fuel levels are low but small enough that fuel is still circulating...
From my fuel tank....it goes
# tank outlet -> carby fuel filter
-> low pressure pump (above diff)
-> factory fuel supply line
-> top of surge tank (in engine bay)
-> Bosch 240 EFi pump
-> 300ZX style inline EFI fuel filter
-> Fuel rail -> Fuel pressure regulator output
-> base of surge tank (refills it, entering at the top would be better)
-> surge tank overflow outlet -> stock fuel return line.
soooo... in answer to your questions directly.
1. 1-1.5 litres
2. Return fuel from fuel rail goes back into my surge tank. This makes sure the surge tank is always full
3. No problems at all. Except when that earth wire came loose... 
4. Low pressure carby pumps are used to supply the surge tank because they can "suck" fuel out of the tank... most EFI pumps lack the ability to suck, they can only push and be fed by gravity. Make sure you use a low pressure HIGH FLOW lift pump.
5. Your existing in tank pump??? By this i guess you are suggesting that you already have an intank EFI fuel pump. If so, then why do you want to use a surge tank? THere is no real need and it would only create more work and extra headaches which are not required. If you think your current intank pump is not up to the job... simple, replace it with an intank 255L Walbro pump from Importbitz at a VERY nice cost. NOWHERE NEAR as much hassle and awesome results.... without all the surge tank ugliness 
That's what i would have done.... but heinsight is a wonderful bitch.
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| | Subject | Poster | Date |
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surge tanks: a few questions.
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Big T | Sun, 06 March 2005 11:18 |
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Re: surge tanks: a few questions.
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-==L=a=N=c=E==- | Sun, 06 March 2005 11:26 |
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Re: surge tanks: a few questions.
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THE WITZL | Mon, 07 March 2005 01:13 |
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Re: surge tanks: a few questions.
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Big T | Mon, 07 March 2005 08:40 |
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Re: surge tanks: a few questions.
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Rallystanza | Mon, 07 March 2005 08:52 |
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Re: surge tanks: a few questions.
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-==L=a=N=c=E==- | Mon, 07 March 2005 08:52 |
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Re: surge tanks: a few questions.
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Sam_Q | Thu, 10 March 2005 21:35 |
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Re: surge tanks: a few questions.
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Big T | Fri, 11 March 2005 09:14 |
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Re: surge tanks: a few questions.
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THE WITZL | Fri, 11 March 2005 00:15 |
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Re: surge tanks: a few questions.
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Big T | Fri, 11 March 2005 08:14 |
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Re: surge tanks: a few questions.
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Sam_Q | Sun, 13 March 2005 14:37 |
