Jump to content
SAU Community

Recommended Posts

Okay guys.

So I know exactly what a surge tank is, I also know how to set one up.

My question however is WHY install a surge tank?

I mean I always planned to install one as I thought it was just one of those things you are supposed to do, especially if you have a high HP application.

However I have been doing some more research and talking to a number of people with high hp cars and they dont use a surge tank. Hell they look at me crazy for even talking about one.

Essentially the setup is very similar, just without the tank. They use a lift pump to get fuel out of the tank, then have the line running to a larger pump (or 2 pumps) then route it the way you normally would. They completely eliminate the surge tank.

So my question is, if it is not used because that is the only way to supply enough fuel to the system in high hp applications, what is the primary purpose to install a surge tank?

Thanks guys.

-Sayajin

  • Replies 40
  • Created
  • Last Reply

Top Posters In This Topic

so the fuel system doesn't get air in it due to the sloshing fuel in the tank, given the high rates of tank scavenge in big hp applications (and the sorts of driving such cars are used for)

Means there is a constant air free supply of fuel to the pressure pump. When dragging or circuit racing as your tank gets low and the fuel is being thrown around the pump can suck in air.....well thats my understanding of it....

Okay guys.

So I know exactly what a surge tank is, I also know how to set one up.

My question however is WHY install a surge tank?

I mean I always planned to install one as I thought it was just one of those things you are supposed to do, especially if you have a high HP application.

However I have been doing some more research and talking to a number of people with high hp cars and they dont use a surge tank. Hell they look at me crazy for even talking about one.

Essentially the setup is very similar, just without the tank. They use a lift pump to get fuel out of the tank, then have the line running to a larger pump (or 2 pumps) then route it the way you normally would. They completely eliminate the surge tank.

So my question is, if it is not used because that is the only way to supply enough fuel to the system in high hp applications, what is the primary purpose to install a surge tank?

Thanks guys.

-Sayajin

Thank you very much for your question, which is more than wonderful ;) I wish more useful answers!!

oil surge....fuel surge. Both shit things especially in racing. Im surprised you know what one is and how to fit one up but yet not know the purpose behind it.

lol, I'm surprised too. especially since it's name pretty much sums up what it does. anyone (i assume) can see that you want your fuel pump sucking in 100% fuel in a straight line, under braking, around a corner etc ALL THE TIME. with a big arse fuel tank fuel will be moving away from the pick-up under all those conditions hence the need for a surge tank.

You don't need a surge tank if you are going to race (circuit or drag) with no less than 1/2 tank of fuel ALL the time.

The idea of a surge tank (say 3 litres) is so you don't have to carry around an extra 35 litres of fuel all the time.

At an SG of 0.75, that's a weight saving of 26 kgs.

:nyaanyaa: cheers :domokun:

bkc, you're cool dude, but can you please reduce the size of your font to the same as everyone elses and with no bold... My pupils get 5mm wider everytime i read your posts :nyaanyaa:.

thanks.

bkc, you're cool dude, but can you please reduce the size of your font to the same as everyone elses and with no bold... My pupils get 5mm wider everytime i read your posts :nyaanyaa:.

thanks.

When reading his posts I sit further away from the screen.

:domokun: cheers :P

You don't need a surge tank if you are going to race (circuit or drag) with no less than 1/2 tank of fuel ALL the time.

The idea of a surge tank (say 3 litres) is so you don't have to carry around an extra 35 litres of fuel all the time.

At an SG of 0.75, that's a weight saving of 26 kgs.

:nyaanyaa: cheers :domokun:

Yeh or your stupid enough to put a 40 litre fuel cell in the boot which surges no soon as your fuel level drops below 30 litres....*points at self*

This is an interesting topic to me.

Going back you would never even consider trying to run up a gtr with 550rwhp on a single in-tank fuel pump.

Now it gets done all the time.

People used to spend $1000's on over complicated fuel systems that made your boot smell like a BP refinery.

I am wondering now what in-tank options can take you to 700rwhp.

A single intank bosch 044 seems good to about 550 - 600rwhp.

Does anyone know if you can fit Two bosch 044's through that nissan fuel tank hole ?

Is their a pump that can be mounted in-tank that flows more then an 044 ?

Edited by Butters
This is an interesting topic to me.

Going back you would never even consider trying to run up a gtr with 550rwhp on a single in-tank fuel pump.

Now it gets done all the time.

People used to spend $1000's on over complicated fuel systems that made your boot smell like a BP refinery.

I am wondering now what in-tank options can take you to 700rwhp.

A single intank bosch 044 seems good to about 550 - 600rwhp.

Does anyone know if you can fit Two bosch 044's through that nissan fuel tank hole ?

Is their a pump that can be mounted in-tank that flows more then an 044 ?

In tank, 2 x 044 mounted one above the other, the top one simply has a longer pick up hose to the strainer. Been done before.

:P cheers :banana:

This is an interesting topic to me.

Going back you would never even consider trying to run up a gtr with 550rwhp on a single in-tank fuel pump.

Now it gets done all the time.

People used to spend $1000's on over complicated fuel systems that made your boot smell like a BP refinery.

I am wondering now what in-tank options can take you to 700rwhp.

A single intank bosch 044 seems good to about 550 - 600rwhp.

Does anyone know if you can fit Two bosch 044's through that nissan fuel tank hole ?

Is their a pump that can be mounted in-tank that flows more then an 044 ?

You could put as many fuel pumps in your tank as you want but all it is reliable for is on the dyno or sitting still....

Start drag, circuit etc etc and see how well it works....and you cant say 'ill keep the tank full' cos it aint gonna happen with 700rwhp and a couple of laps.

Yeah fuel hose 'breathes' but if you run braided stuff it minimises the smell - to a point.

It's all braided. I realise that fuel hoses 'breathe', but the in cabin smell is unbearable even after 15 or 30 mins of parking car with windows closed, engine off. Open the door and you could almost pass out from the vapours. Luckily I don't smoke :P

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • The 296mm rotors are the R33 turbo brakes. The 310mm rotors are the R34 turbo brakes. The calipers are nearly the same, but not. They're the same caliper but the R34 caliper has longer legs so that it sits out far enough to go over the rotor. The pads are the same for both. When you say, "I bough tsome EBC"....did you just mean pads? Or rotors? 310mm rotors fit under 17" wheels. There may be some wheels without enough clearance though. I can't fit my fingers between the barrel of my wheel and the "corners" of my R34 calipers, but there is plenty of room behind the spokes. This is on Enkei RPF1. You can fit 324mm rotors inside a 17" wheel, but I'd be willing to bet that it would be close to impossible with the Nissan/Sumitomo caliper (using an adapter, of course), because the Sumitomo caliper is fatter than the Brembo caliper that is supposed to go on the 324mm rotors.
    • Hi. Can someone tell me what brakes(and mainly WHERE) can i buy brakes on R34 GTT? I bought some EBC which SHOULD go on my car(i have GT but it has GTT brakes) but it does not fit, Brakes are "too" small(296mm) Are 310mm be good or? I have 17 inch wheel so no "big boys" but for me driving i just need one that fits and i can get here in EU/Czech.
    • Since winter isn't that harsh anymore in Poland, i will definetely drive it 365 days a year 😉. But if the snow hits i will try it for sure and let U know. Only swap i am planning to do is of course R34 GTR front 😍.
    • Hey. Very valuable information about pitwork, I will pay attention when buying any consumable parts 🙏 As for the carpets - I got a handful of information from nengun, from which it appears that indeed the carpets for the driver's side are OEM. They are not able to show me any pictures due to the long chain of different sales entities but after I place the order, as soon as the goods arrive at the nengun warehouse from which they will send the shipment to me they can send me photos and if my purchase differs from OEM I can immediately return it / cancel the purchase. I think I will give it a try 😉. Of course i'll let you know what's what as soon as i get them P.s. I know the topic is not relevant to the thread, but both nengun and amayama have these SICK 😍 trunk room lamps available. Do you know anyone who ordered them? I need to have one in my car
    • I've managed to find this: Nissan_Stagea_AutechVersion260RS (1).pdf
×
×
  • Create New...