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My Quadra
- Thread starter Andyquadra
- Start date
MakeEverything
Active Member
Andyquadra
Well-Known Member
DaveL485
Staff member
Looks like your making good progress. I does help having the proper tools too. Sure I've seen that pump and swirl pot arrangement somewhere
Yes you have, on my car. And we BOTH stole it from the Fuego setup lol
The swirl pot isn't pressurised either, only the pressure pump, line to rail, rail and line out up to the regulator is pressurised. There's less pressurised system in mine and Andy's than there is in yours.
Temperature isnt a problem as the fuel constantly circulates around from tank>swirl>tank and swirl>rail>swirl. It's always cold. Before I fitted mine, anything under about 2 gallons in the tank and under hard cornering right the fuel would wash up the side of the tank and the pump would take a big gulp of nothing, i'd jam my foot down and just get a load of misfiring and popping before it picked up and took off. Very annoying.
Works well, and there's plenty of room inside for the battery. I'd rather have the battery inside than a litre or more of fuel, plus I can reach the terminals to disconnect without even undoing my harness.
Andyquadra
Well-Known Member
Yes you have, on my car. And we BOTH stole it from the Fuego setup lol
The swirl pot isn't pressurised either, only the pressure pump, line to rail, rail and line out up to the regulator is pressurised. There's less pressurised system in mine and Andy's than there is in yours.
Temperature isnt a problem as the fuel constantly circulates around from tank>swirl>tank and swirl>rail>swirl. It's always cold. Before I fitted mine, anything under about 2 gallons in the tank and under hard cornering right the fuel would wash up the side of the tank and the pump would take a big gulp of nothing, i'd jam my foot down and just get a load of misfiring and popping before it picked up and took off. Very annoying.
Works well, and there's plenty of room inside for the battery. I'd rather have the battery inside than a litre or more of fuel, plus I can reach the terminals to disconnect without even undoing my harness.
not that I'm picking
I installed my fuel system 8/8/2009! page 2 and 3 of this thread and yours was 25/5/2010
layful:I'v probably got even less of a pressurised system as well, all I'v got is from the pump in front of the swirl pot, the line to the fuel rail and the rail itself, no more as my pressure reg is bolted to the rail.
DaveL485
Staff member
not that I'm picking
I'v probably got even less of a pressurised system as well, all I'v got is from the pump in front of the swirl pot, the line to the fuel rail and the rail itself, no more as my pressure reg is bolted to the rail.
When did we buy the Fuego again?
Yes, you were second scumbag (and I was third lol)
Andyquadra
Well-Known Member
When did we buy the Fuego again?
Yes, you were second scumbag (and I was third lol)
:witless:
A
administrator
When was the last time it was out ?
MakeEverything
Active Member
Andyquadra
Well-Known Member
At the back of the car, there's a standard cosworth pump filling the swirl pot. Without the second pump kicking in, the first pump fills the pot and once its full the overflow goes back into the main tank, no pressure reg in this part of the system. The second 044 bosch pump, next to the pot, sucks fuel through a filter and pumps it into the rail and pressure reg. The fuel then goes back into the swirl pot, and any overflow goes into the tank. There's 4 pipes on the swirl pot, feed from main tank, return to main tank, feed to fuel rail, return from rail. I guess there's going to be a certain amount of pressure build up in the swirl pot, but its only going to be created by the first unregulated pump filling the swirl pot, so very little.
DaveL485
Staff member
About the last time your five was reliable.
Yes. No point in pressurising it though is there.
A
administrator
I wasnt having a go - genuine curiosity. Would be great to see it. I never have
Haz
Well-Known Member
Was his 5 ever
Regards the pot, it wont have the pressure of the rail but there has to be some to force the fuel through the return and back to the tank. As the hoses are the same size to and from the pot then the pressure will be the same as it leaves the pump round the system back to the tank. So it is pressurised then?
MakeEverything
Active Member
Was his 5 ever
Regards the pot, it wont have the pressure of the rail but there has to be some to force the fuel through the return and back to the tank. As the hoses are the same size to and from the pot then the pressure will be the same as it leaves the pump round the system back to the tank. So it is pressurised then?
But the pressure of the fuel being forced out back to the tank is also lowered by the HP pump sucking it out the injectors and being burned! Pressure in there is negligible, by comparison to fuel systems in an injection car.
DaveL485
Staff member
Was his 5 ever
Regards the pot, it wont have the pressure of the rail but there has to be some to force the fuel through the return and back to the tank. As the hoses are the same size to and from the pot then the pressure will be the same as it leaves the pump round the system back to the tank. So it is pressurised then?
No, I don't count it as a pressurised circuit. Yes the pump runs fuel around the circuit and to move the fuel it technically has to create "pressure" after the pump but very little indeed, probably not even measurable, and there is no mechanism to introduce any sort of stress. It just fills the swirl pot and then pops off down a pipe back to the tank. It's under no more pressure than the return to tank from the back of the reg, on the OE setup.
---------- Post added at 11:19 PM ---------- Previous post was at 11:14 PM ----------
I'd bet a whole pound that the lift pump curcuit sees below 1Psi unless the swirl pot outlet at the top is considerably reduced in diameter to create an almost regulator effect (but why would you, the intention is to keep the swirl pot full so the less backpressure, the more flow from the lift pump.
MakeEverything
Active Member
I agree.
