fmp

iTrader: (7)

after a recent track day at Brands, i experienced the dreaded fuel surge!

i have started looking into a solution. i know a swirl pot is probably best, but has anyone used one of these:

01-05 WRX/STI Anti Surge Tank - Internal [HYAST-WRX001] - £190.16 : AET ENGINEERING - AETTURBOSONLINE

if so, what where the results?

And i assume this fits in the fuel tank? did you fit yourself? easy job??

Any and all comments welcome, or suggestions for a better solution with pics and prices!

STiFreak

iTrader: (4)

This is similar to the super expensive one subaru do (in the Spec C iirc).

You can also do a cheap home made version like this.
RomRaider • View topic - Home Made In tank fuel anti surge device

Steve Gibbins

iTrader: (1)

Fitted one a few weeks ago ready for a trackday at Spa this coming Monday, bit of an awkward job, worst part was trying to get the whole assembly back in through the top of the fuel tank.
Obviously don't know the results yet, there was another thread on here and I think the general thought was that it may help a bit but not really a complete cure.

Steve

Butty

iTrader: (2)

Greenwood racing are doing them for quite a bit less.
:: GRD - Greenwood Racing Developments ::

I tried to source the anti surge box as fitted to US STis last year without success. They aren't a separate part number but have to be bought with the fuel pump.

fmp

iTrader: (7)

Thanks for the info guys!

scoobyc

iTrader: (2)

Sorry if this is a sill question.

What is fuel surge and what damage does it cause?

How did you know u got fuel surge?

Will i NEED to do this if im not having any major problems?

Steve Gibbins

iTrader: (1)

Well, just thought I'd let you know how I got on at Spa, fine apart from getting FUEL SURGE coming out of Stavelot bend at anything below half a tank
Only doing it at that one point on the track (a fairly fast right hander) and once filled with fuel the problem went away until back down to half a tank again so I presume it was surge so the Hyperflow kit hasn't helped at all.

Steve

fmp

iTrader: (7)

thanks for the update steve.

looks like the money is better spent put towards a swirl pot etc!

STiFreak

iTrader: (4)

From what I understand, the impreza fuel tank is in two sections, one each side of the transmission tunnel. The fuel pump and therefore the pickup sit in the right hand side of the fuel tank, so when you go around a long fast right hand corner, the G's push the fuel to the left hand side of the tank and the pump starts to pickup air.

The idea behind these devices is to capture some fuel in the box as you turn into a right hand bend and stop it sloshing away from the pickup. The return feed is usually pumped back into the box, which should help a bit too.

A swirl pot is still the best solution, but not always one that people who use their cars as a daily driver are prepared to accept.

No you won't need to do this unless you track the car or are already having fuel surge problems.

Steve,

Have a read of that thread I posted, it seems that fitting the pickup lower in the tank is key to this actually working properly.

fmp

iTrader: (7)

Any idea's on the cost of a swirl pot setup?

STiFreak

iTrader: (4)

Swirl pots themselves are not that expensive ... approx £80, but the lines, fittings and extra in line fuel pump will push the price up. Sure someone who has fitted one will chirp in with the total cost.