Fuel pump upgrade install (Visconti 290lph)
 

So today I installed a new 290lph fuel pump that I got from Visconti and realised that there wasn't too much information on the subject so I decided to make a small turorial on it.

First of all it's not the most fun modification to do with all the black sticky sealant, tight cramped areas and the effort required not to get fuel all over your seats but all in all it probably took me about an hour. (Also run the car until the fuel light comes on, it will save you getting fuel everywhere)

1. Firstly you will need to release the pressure out of the fuel system by removing the fuel cap and then remove the 10mm bolt holding the left hand side rear seat and fold the seat up out of the way.
http://i213.photobucket.com/albums/c...psf9591cda.jpg

2. Under the seat you will see a cable entering a steel lid that is stuck down with some soft setting sealant, this just pops off with a flat blade screwdriver and a little bit of force.

3. Unplug the connector that supplies power to the pump and the fuel gauge floater and move aside.

4. Next the fun part, remove the fuel line connected to the top of the white plastic fuel pump carrier and watch out you don't get fuel everywhere, wrap a rag around the hose to absorb the fuel. You will also see a big collar holding the carrier in the tank, this collar needs to be unscrewed to remove the carrier, this is nearly impossible to do by hand so I just used a soft hammer and a length of aluminium to tap the collar loose.
http://i213.photobucket.com/albums/c...psbe2b2941.jpg

5. Once that is removed you can pull out the carrier watching out for the float switch as well as anothe fuel line that needs to be disconnected.

6. Once it's been removed follow this link for the fuel pump install in the carrier.
http://img259.imageshack.us/img259/4...stallinstr.pdf

7. It's a tight squeeze to assemble the carrier back together as the carrier actually holds the fuel pump against its seal (2 o-rings).

8. The wires in the carrier need to be cut and soldered then heat shrink applied. Red to blue and black to black.

9. Do everything back in reverse and your done.

10. Enjoy smelling fuel in the car for the next few days :)

Nice write up. I would add to anyone who has never done this, to have a low fuel level and to release the fuel pressure. Fuel system is something you should take extra precautions with.

what would the point of upgrading the fuel pump??? are we thinking higher flow pump get gas to engine faster?

Higher quantity of gas faster. Pumps are rater liter per hour. This pump flows more fuel than the stock pump, required for when requesting more fuel via the ECU when going forced induction.

The pump may pump faster but isn't it limited by the quantity the fuel injectors pump? Just asking.

Oh yea I forgot to add that. Il wack it in now.

Yes. Injectors have a flow rating as well. Once you get to high enough fuel requirements, you will need to replace the injectors so you have more headroom (IDC, injector duty cycle). You'll more than likely run out of pump before injectors, though. Usually both are replaced, but it's much easier to replace the pump. Ran a 240lph pump in WRX before I even considered switching injectors.

does a bigger pump decrease MPG?

Not by itself. That's all in your right foot. Most tunes get increased MPG, but suffer due to how much more they're on the throttle from enjoyment.

thanks for the write-up!

could you pls share detail on the pump itself?

manufacturer, p/n?

why not just take the seat all the way out tho instead of fighting with working with it held up?

You are correct. This mod is pretty much pointless for anyone not running boost or a tune with the larger injectors to take advantage of the higher flow.

It's good to have a sticky on the process to do this.

It's not really fighting it, it's just foam, the amount of time you are holding it up for is much shorter than removing it completely.

You will need a pump when you start to run a bit of boost. I also run 500cc injectors with this pump and together their good for 20psi+ on e85