So. What do I need to do to get fuel from the tank to the engine...???
At the mo, I have a fuel tank on the floor, and some pipes. Any ideas anyone??? *grin*
It\'s been suggested that I run a swirlpot setup. If I do, I\'m intending to place it under the car, as close to the tank as possible. But I have queries.
1 - Stupid question, but did the S3 come with a fuel pump? Where is it then? If not, can I assume I need an appropriate one to supply the swirlpot? And what is an appropriate one?
2 - where would one get an appropriate swirlpot from? I don\'t need one that would run a quad turbo 4 rotor, but would like one with plenty of guts to handle an aftermarket turbo... Any pointers?
3 - then I need the gutsy pump to charge the system... Which one would that be then?
4 - where can I find a schematic for all this so I can understand what I\'m building.... *Grin*
Anything I\'ve missed out here, please do let me know!!
Cheers
OJ
cant answer all of them but yes the gen 1 has a fuel pump under the car (pasenger rear seat) the wiring is under the seat and the pump and filter under the car, if you jack up the pasenger side you will see it just follow the pipes!
ive ordered a fascet red top to run my new set up, sure that would have enough guts, or just strip a gen 2 set up?
Mark
right!
The series 3 runs a low pressure in line pump under the car that is gravity fed from the bottom of the tank. You could either run an intank pump with some decent wiring, something like a Bosch 040 would be fine for 350 rwhp but it needs somekind of swirl tray in the tank to keep fuel at the base of the pump when you go round bends. Or you can use the special foam that race cars have in the tank.
An easy option for stock engine is take the internal pump from a TII or FD complete with mounting plate that bolts straight to the top of the tank and cut the appropriate sized hole in your tank and drop it and screw it down. Again you will need to put something in the bottom of the tank to ensure that fuel soesnt slosh past the base of the pump. FD & FC\'s just have a little 3 inch deep tray with some holes in it that the pumps drops in. You need to attach it to the bottom of the tank.
If you run a seperate swirl pot its just a small 1 or 2 litre tank with 3 pipes at the top and 1 at the base, you then need an in line pump like a Bosch 044 to feed the engine from the bottom pipe. The first top one fills the pot from the tank with the filler pump which could be the stock pump, the second is the return from the engine and the 3rd is an overflow back to the tank when the pot is full which its should be most of the time, Demon Tweaks sell swirl pots or try the tuners above. If the stock pump doesnt fill your swirl pot quickly enough you can easily replace it with a Facet pump that fits straight in but they do Tick when running which can be annoying.
Because the injection system uses a high pressure system you need a suitable feed from the pump to the fuel rail, a suitable return the same size back to the tank or the s/pot. The first gen doesnt use high pressure so you will need to replace the rubber hoses with high pressure ones.
Hope that helps
You could run a parallel fuel setup like the one on the FC3SPro website http://www.fc3spro.com/TECH/MODS/FUEL/fsystem.htm (http://www.fc3spro.com/TECH/MODS/FUEL/fsystem.htm)
This can be fed by 2 stock pumps from a TII / FD or a pair of walboroughs, feeding each leg, and a return pipe back to the tank from the fuel pressure reg. Plenty of fuel for well over 500BHP !!
Every now and again you can pick up the dual intank pumps all ready to go into the tank on eBay. No need for a swirl pot with that setup.
Cheers guys! i\'ll prob go with the surge tank approach simply cos it\'s future proof, and means not cutting a hole in a tank with something like 20 litres of fuel.... *shudder*
Next question - how would one wire this reckless setup together??? obviously we have one feed for a single pump, but now we have two pumps.... wire in a relay with a seperate feed for both pumps???
i would splice a feed from the stock set up to switch a relay with a decent fused power supply to the pump from the battery. Only thing i\'m not sure about is the fact that the stock ecu powers the pump for a second or 2 when you turn the ignition to the first notch to bring the fuel pressure back up but i\'m not sure if the carb\'d model will do this, its not a problem it just may take a couple more spins of the engine to start it as the pump will only pump while the engine is cranking not with the igntion on.
Unless you get clever and use the TII relay and ecu wiring which would also adjust things properly for lowering the fuel pressure at idle as IIRC the TII does. (this would only apply if you ise the stock ECU, FPR and Pump)
What ECU are you using?
Planning to use a Microtech LT10 for this proj...
Cheers for the reply dude!
OJ
ok im lost now but learning on the way!!:Thumbsup!
This is why old skool rules
in that case dont worry about the pump, just give it power, the micro tec can sort the idle out
Hey Mark - Yup, bit of a learning curve here also... *grin*
Ant - I\'ve found a 1st gen specific surge tank on tweakit.net, so I\'m going to get a lift pump (figure the 24 year old one could do with retiring... *grin*), surge tank, bosch pump and fuel rail stuff from Tweakit. Has anyone used Tweakit for bits before? There\'s a a couple of otherbits (radiator the right size for an oil cooler underneath, etc, etc) I\'d like to order at a later date...
Cheers
OJ
yeah I\'ve used them plenty of time .... top outfit and very helpful. Got one of the surge tanks on my 1st gen :D
Has anyone got the link to tweakit???
chers, michael.
I am about to tackle the fueling on the moggy after the exhaust is sorted sothis is really helpfull for me too.
//www.tweakit.net (be warned lots of bits to spend money on!)
oh my god it is as if a hole in my life has now been filled!!!!!!!!!!!!!!
awesome site. Hmmmmmmmmm looks like my trip to oz at the end of the year just ot a little bit more expensive!