What are the options for up to about 320 BHP on a MY00? I gather the fuel pressure can struggle on the standard one. I would like to reduce the injector pulse widths for a given amount of fuel and not have the fuelling struggle in demanding conditions and remain consistent. Any links on installing one - I know on I-club there were some dodgy connections and arcing with misfit plugs. Any other issues?

 

http://www.powerstation.org.uk/News_Page.html at the bottom of the page

Walbro seem to be mentioned a lot by folk. Any stockists?

http://www.jdsperformance.com/index....=245&fcmd=item A lot of the I-club people are using this - would it fit in a UK?

[Edited by john banks - 5/5/2002 11:13:12 AM]

 

FSE are apparently the best?

I got my local scooby dealer to do it for me - they hid it amongst some warranty work for me - they struggled a bit to make it fit (slightly bigger than standard pump) but with some carefull bending of pipes it should be ok to get it wedged in the sender unit.

Initially I didn't want to try and do this myself cos it sounded really hard but seeing what they did it actually looks quite easy!

Chris

 

check out http://www.turbotrix.com/parts/255pump.shtml
http://www.fuelsystem.co.uk/
http://www.gnttype.org/techarea/fuelsystem/walbroflow.html
http://209.43.1.245/Online%20Catalog/Buick%20Performance/fuel&cooling/fuel_parts.htm

A few links on the pumps.

 

John,

I would be interested in your findings.

FSE as Chris said offer an Impreza Turbo upgrade pump for £145 - I don't know how this compares with the other pumps offered....

Thanks

Gavin

 

Thanks guys. FSE it is then.

 

john, email mark (R19KET) on m@rk-a.com
hes got some walbro pumps for sale cheap

mikee

 

John....

Mail me direct I have just bought some bits that you may be interested in the details for... See pics in my other thread.. Also fuel lines arent up to the job.. andy says that you can get a 6psi drop across the standard lines...

David

 

Thanks, I've sorted one from Mark.

 

Thats what I was going to suggest.

David

 

That pump that Mark has, pumps a lot more fuel With an adjustable regulator (FSE) I was able to increase fuel pressure at full load by up to 2 bar !! The standard pump was struggling to maintain the pressure at anything over 5000 rpm.


Andy

 

Anyone know how easy it is to fit into a wagon?

Thanks
Richard

 

Easy as thats what Ive got... If you give me a few weeks Ill take pictures whilst I do it...

David

 

Is there any differences in fitting the uprated pump to a WRX or UK car compared to a U.S. one ?

http://www.i-club.com/mods/fuel_pump.htm

Thanks

Gavin

 

Thanks!

Richard

 

Is it a good idea to replace the standard pump as a matter of course?

I`m running about the 320 mark on a UK car, with no fuelling problems at the moment...however car is only 1.5 years old!

If I replace the pump, will the regulator simply maintain the same pressure as before? ie the new pump gives a safety margin in terms of pressure suppled to the regulator? So no remap required....

Cheers!

 

I got mine today from Mark - thanks. I gather from him that the pressure can suffer on modded cars with the standard pump, and this could manifest in poor atomisation of the fuel and effective lean spots, but still a high lambda reading as fuel is dumped out the exhaust. He cites several cars which were struggling for fuelling, and I am already pushing 85% duty cycles over a fairly wide range - I want consistency and plenty of reserve in my fuelling, and any drop in duty cycles is welcome since I am getting a remap I can work around that.

 

So better pump with std regulator = no change at injectors & no chance of regulator pressure supply falling off?

 

James,
That's correct and better pump + uprated regulator = increased fuelling throughout the rev range therefore unless you utilise some form of fuel management system (Apex'i AFC for example) you will run incredibly rich all over.

What some of the Evo guys do is run the Apex'i AFC to increase the boost level at which the fuel cut occurs (by 'fooling' the ECU into thinking there is less air going into the engine) and then run with an uprated pump and regulator to provide the extra fuelling that you need because the ECU is reducing the injector duty cycle.

Andy

 

Good stuff. Cheers!

 

Can somebody point in the direction of a decent & reasonable priced uprated fuel pump, Its rather urgent as mine looks to have given up the ghost.

Mark A

 

Did the pump upgrade about six months ago... nice improvement in throttle responce and in low rpm situations. I installed a Bosch pump, part number 0580 254 910. This is the same part that AVO use in their Pump upgrade kit. It is conciderably taller and required the feed pipes to be shortened. I would also reccomend replacing the fuel tank rubber gasket, as my tank leaked after the swap. I'm still running the standard regulator and fuel lines... but will change to the split rail system soon !
>Mark.