I was recently very curious about fuel system set ups on high performance cars, particularly Subarus, and so I tried to find some information about the full system. Whilst I had a vague idea of how the fuel system works in a standard car, information about systems in race cars seems to be very sketchy and hard to come across.

After a few hours of research and looking blankly at diagrams with information that meant nothing to me, I managed to come up with this little diagram: (Apologies for the small size, hopefully people can still read it)



Obviously I have very little knowledge of this kind of thing, so I was wondering if anybody could help me out with anything I've missed off, or an overview of how a system would be set up in a race car.

Cheers,
Andy

 

really worth looking in the projects sections on here and on 22b-nearly all of the 480 bhp plus cars will need built fuel systems and its agood way of see,ing how other people lay out and set up their systems.

 

A lot of people when uprating their fuel system use a parallel fuel setup rather than a series fuel setup. To do this your diagram needs to be modified so that the HP pump and filter feed to both rails and the FPR is at the other end of the fuel rails providing the return.

 

Cheers for that, I'll have a look over there.

So in the case of a parallel setup, would the HP pump and the filter be duplicated, or would the feed from the filter instead split into both rails? I'm assuming that the feed out of the rails would both go into the FPR and continue back into the swirl pot from there?

 

The outlet from the filter would split with a T piece through the injector rails then T piece back to the FPR and return to the tank. Fitted a setup to my Bug about 4 years ago.

 

http://www.airpowersystems.com/wrx/m...01_install.htm

This is similar to the system I fitted might give you a bit more of an insight.