fuel pump

**pauldarcy** · by **pauldarcy** » Sat Oct 16, 2004 3:13 pm

i have a spare fuel pump. could i use this one as well as the one already on car instead of buying a higher flow one ?if so will this in turn make injectors flow more

Stupink · by **Stupink** » Sat Oct 16, 2004 3:26 pm

Yes and no,
Install it in series is easy first pump feeding the second, will ensure a good high flow assuming sufficient voltage/ampage (suggest re-wire heavy duty cable)
but no, it won't flow more unless the current pump is not capable, the fuel pressure regulator shoult sort it all out.. uprated pumps/double pumps etc just ensure good supply [img]/smile.gif[/img]

**pauldarcy** · by **pauldarcy** » Sat Oct 16, 2004 4:18 pm

cheers stu, do you know if the relay will need replacing/ or need additional one?

Stupink · by **Stupink** » Sat Oct 16, 2004 4:32 pm

Sorry, dunno the rating of the pump or relay, but it barely manages one pump, so i wouldn't suggest running two off of it, perhaps a quick email to bosh to find out the rating of the pump. I run a 30amp feed for the 909 I installed, that should be ok with good wiring i would have thought.. but I dunnooooooo [img]/smile.gif[/img]

**jonnyboy** · by **jonnyboy** » Sat Oct 16, 2004 5:13 pm

Have a look on the EDS web site, I read about having two pumps in series, I think it might tell you what to do, and it has pictures too!!

**jonnyboy** · by **jonnyboy** » Sat Oct 16, 2004 5:15 pm

woops

Stupink · by **Stupink** » Sat Oct 16, 2004 5:50 pm

<a href="http://www.eds-motorsport.de" target="_blank">www.eds-motorsport.de</a> click the english flagg at the top, then under tips and tricks and then under the one next to the melted piston.

few ideas there but no guides im fairly sure.

**samy** · by **samy** » Sun Oct 17, 2004 2:43 am

The standard fuel pump is designed for 3bar fuel pressure, it don't flows very much at high pressures. If you run a setup with very high fuel pressure f.e. 5bar (without vacuum) and more then 300ps then you better put them in series. If you want an efficient way then use two pumps parallel with two feed lines to the engine (keep fuel pipe diameter big to keep pressure loss on the way as small as possible). And use bigger injectors that you can run the same fuelflow on lower fuel pressure then you can run over 400hp or if you install two complete stand alone systems (two fuel pumps, two feed lines, eight injectors, two telescopes in the tank) you can run 600hp.
But a much easier way is to run one single fuel pump on applications with up to 400hp above that better use two fuel pumps to keep some safety fuel flow that its all time enough available on the injectors. Pumps thats good enough for the most applications Bosch 909 (198l/h) , 910(200l/h) or better 053 (228l/h).

________________________
Greeting Samy - <a href="http://www.vmax.de" target="_blank">http://www.vmax.de</a>
<a href="http://www.vmax.de/html/evo650_c20let_vmax.jpg" target="_blank">654hp/740nm [img]/smile.gif[/img]</a>

fuel pump

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