im going to be using a gt35/40 turbo with 870cc injectors and rail do i need a surge tank and what pump(s) do i get to handle this

just a bit off topic which intake plenum will you be using with the setup?

mos likly just a plazaman plenum with the 72mm throttle body

In short, no you do not NEED a surge tank. If you plan on doing any circuit work or competition drag racing, then a surge tank is a must.

I'm running the stock intank pump which feeds a surge tank and then a bosch 044. Before I fitted my surge tank the bosch pump would make all sorts of weird noises (like it had bubbles in it) and the fuel pressure would vary depending on how much fuel I had. I fitted the surge tank and all the problems stopped.

and if i dont get a surge tank what pump do i use also if i got a surge tank where is the best place to mount it without bringing attention to the boys in blue

You might be able to get away with getting a new stock internal pump. Best hiding place would be under the car. Their more expensive than the normal ones. You could put it in your boot like this http://www.calaisturbo.com.au/showthread.php?t=164412 and get a sub box, sheet of mdf to hide it.

interesting, i was told by my tuner to get a 044 and leave the std in tank one which i think is a 040??? only got gtr 444cc injectors but got t4/t3 with .63 housing an ETM man and XF tb. havent run it yet but....

so what use my standard stock internal pump to pump the fuel to the surge tank and then a 044 to pump it from surge tank to engine

The way I have mine is the intank fills the surge tank and the surge tank goes to the bosch 044 to the engine. the return line goes to a T piece which goes back the the surge tank and the fuel tank.

ok cool well when i get it i will speak to some of my mates they would know how to set it up the T piece part is confusing me thats all i may be purchasing the surge tank in one of the previous posts in this thread the one in the link so that would be the setup ill most likly use

u don't need the t-piece. just run ur return line to the surge tank

you dont even need a surge tank if its just a street car.

yeh like a baffled sump....only for extreme g's of circuit/race/drift i've just got mine going from the intank pump into the 044 like originally they have installed but with the 044 instead.

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Quote: Originally Posted by obseshn im going to be using a gt35/40 turbo with 870cc injectors and rail do i need a surge tank and what pump(s) do i get to handle this Most tuners recommend a max of 80% duty cycle on your injectors. So 80% of 870cc = 696cc (per minute) 696cc x 6 injectors = 4176cc/min = 4.176 lts/min An 044 will be just shy of this i think. The above assumes you want to make full use of the injectors.

Quote: Originally Posted by airbagsVL you dont even need a surge tank if its just a street car. Will the factory swirl pot handle bigger injectors and say an 044 or some other bosch pump feeding the rail? How many pulls before it runs out and you lose fuel pressure and the engine goes pop? What if you have under a 1/4 of a tank will it still keep up then? will it be effictive enough to scavenge the tank when it is that low? Do you really want to risk these things when your foots buried to the floor and your approaching 6krpm and 20+psi of boost?

cheers heaps guys well i want to use it at the drags to without having fuel surges so i may put one in for that sake Quote: Originally Posted by MonstaS4 Most tuners recommend a max of 80% duty cycle on your injectors. So 80% of 870cc = 696cc (per minute) 696cc x 6 injectors = 4176cc/min = 4.176 lts/min An 044 will be just shy of this i think. The above assumes you want to make full use of the injectors. so what fuel pump would you reccomend then?

twin 044's. How much power are you wanting to make?

Quote: Originally Posted by ijd twin 044's. How much power are you wanting to make? so what twin 044 one intank and one from the surge tank hoping for around 500+