Technical Turbo Guys... What fuel pump?

sei16v · Jul 21, 2009

Can anyone tell me what fuel pumps you are using for your turbos? As im after something that can supply me with over 3bar fuel pressure... Will be running 10mm copper flow pipe, and 8mm return, but need to know how to get around the pump on the seicento sporting.

Im sure someone on here has had to uprate their pump, either be it for the 1.4 turbos...

fingers99 · Jul 21, 2009

There's at least one pump that pops straight in the Sei tank (uses the Sei carrier, etc.) as J333EVO used on Blue.

Can't find the build book ATTM, but a search fot J333EVO and fuel pump should throw it up.

sei16v · Jul 21, 2009

searching now

sei16v · Jul 21, 2009

ah looks like the punto75/85/GT pump is also 3bar..and fits right in (quoted from ARC)... Cheers

fingers99 · Jul 21, 2009

It is, but I doubt the delivery rate is up to red top.

sei16v · Jul 21, 2009

looking at the cossie one mentioned in the post, it seems to look completely different. Think i will remove the pump once ive finished the welding and see what can be knocked up.

fingers99 · Jul 21, 2009

Here you go. Don't forget that delivery rate is different from pressure. The one from Glencoe is an RS2000 pump, so should be up to a Red Top.

fingers99 · Jul 21, 2009

Oh pooh. The RS one will be a return style pump. The Sei one will be returnless. :bang:

Worthwhile seeing if a Cinq pump will fit the Sei tank (if so, the S one will) and modify the plumbing to include a return (will depend on the ECU, too: the returnless ones use the ECU to control fuel pressure).

sei16v · Jul 21, 2009

hmm the vauxhall uses a fuel return, and a pump is usually in the fuel line just outside the tank. It looks as if i have 3 pipes from the fuel tank in my sei, i assume i have a fuel flow line, return line and a vent pipe (that goes to the thing under the wing)... is this correct?

fingers99 · Jul 21, 2009

Sounds right.

There should be no return unless (ta -da!) it's SPI. In which case, I betcha the pump is the same as the Cinq 1108, in which case the Fraud pump will be fittable in tank and the Red Top ECU should be fine.

sei16v · Jul 21, 2009

ooh will have a look.... should have really checked note to see what engine i had, whats the difference between the spi and the mpi looks wise, as i know one is single point and the other is multi... should the mpi have 4 injectors and the spi just the one (i know im sounding really stupid about now lol)

sei16v · Jul 21, 2009

ah looks like i had the pre facelift sei engine (has the same air feed as the cinq) so hopefully ive fluked that, making the fuel pump a lot easier to sort out

StoneNewt · Jul 21, 2009

The obvious one is the SPI has a metal intake manifold and the injector is in the throttle body & the plugs leads are easy to route behind the cam cover. The MPI has a plastic manifold with injectors near the head & the fuel rail makes it a bit of a pig to get the leads behind the cam cover.

Oh I just use an external high-flow racing fuel pump rated to some silly bhp at 10bar fuel line pressure.

sei16v · Jul 21, 2009

StoneNewt said:
The obvious one is the SPI has a metal intake manifold and the injector is in the throttle body & the plugs leads are easy to route behind the cam cover. The MPI has a plastic manifold with injectors near the head & the fuel rail makes it a bit of a pig to get the leads behind the cam cover.

Oh I just use an external high-flow racing fuel pump rated to some silly bhp at 10bar fuel line pressure.

If i could get away with an external pump id rather that as i can then fit the pump that is matched to my redtop. What do you do with regards to the existing pump in tank?

sei16v · Jul 21, 2009

ooh and can the vent pipe be blocked off?

fingers99 · Jul 21, 2009

Why would you want to do that?

Neatness aside, the advantage to the external pump is that it would make a swirl pot much easier. (And it would cost you not.)

Don't put a MIG to the old tank, though!

StoneNewt · Jul 21, 2009

I made a plate up that mimics the top of the stock fuel tank I has a connector for the new fuel pump & a pipe that is fed to the bottom of the fuel tank.

The vent out pipe needs to be open & connected to a one way valve to let pressure out else you get positive pressure in the tank & when the tank is low this can have explosive problems in the worst case.

PS. Anyone thought about having a kevlar fuel tank make up, you could have a higher fuel capacity & make is more resistant to fuel starvation, not that I've had this problem my self.

sei16v · Jul 21, 2009

StoneNewt said:
I made a plate up that mimics the top of the stock fuel tank I has a connector for the new fuel pump & a pipe that is fed to the bottom of the fuel tank.

The vent out pipe needs to be open & connected to a one way valve to let pressure out else you get positive pressure in the tank & when the tank is low this can have explosive problems in the worst case.

PS. Anyone thought about having a kevlar fuel tank make up, you could have a higher fuel capacity & make is more resistant to fuel starvation, not that I've had this problem my self.

So is it possible to leave the existing pump in place and just disconnect the motor leaving the feed pipe to sit in/near the bottom of the tank, then put an inline pump in? Saving welding issues....

StoneNewt · Jul 22, 2009

Not a clue, may get away with it if it's a centrifugal pump.

randomizered · Jul 22, 2009

My tank breathes to the atmosphere, rahter than having a charcoal cannister and solenoid. I ran it sealed for a while, but as said, positive pressure can force fuel right past the filler , even at half capacity!

Breathing to atmosphere on new cars is a potential MOT fail though.

I am workign on a different setup now though. Not all cars run fuel recovery soleniods though, and not all ecu's have provisions to drive then (then only open during overrun conditions afair

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