You need to match the fuel pump to the application, such as if your going with 4 x 1000cc your gonna need more than one fuel pump, for example KSP engineering uses a Skyline GT-R fuel pump to fill a catch chamber then has twin Bosch 044 pumps feeding 4x1000 and 2 720cc sub injectors, I will be going with an aeromotive A1000 or twin walbros for my setup which will have 4x 1000cc injectors, For Beau's 20b he uses twin Aeromotive A1000's with 6 x 1680cc.



here is a pic of KSP's Drag FC









althought this may seem like a lot of overkill, believe me you do not want to find out you do not have too small of a fuel pump.

 

Holy ****, can you go into more detail about that fuel setup, I don't understand it all...

 

That setup looks similar to an idea i had..





revvin, i believe that they have a single larger(higher flow)pump that fills a smaller "gas can" or catch can then uses dual smaller pumps to draw from that, this allows fuel to be added to the catch can quicker then the dual pumps can draw it out. This way, the two smaller pumps are never starved...and neither is your engine...



correct me if i'm wrong...

 

I dont understand...If the one huge pump can put gas in faster than the small pumps can take it out, why dont you just run the single huge pump to your engine?...





But to be back on topic, is it true that Walbros are known to fail? Or is it just a nasty rumor?

How much HP is the Walbro good for anyways?

 

Adam I"m still not sure if there are any problems with the Walbro, but I just learned something interesting from Chris Ott at Rotary Performance. He recomends supplementing the ground for the pump. He said to just pull away some of the insulation around the wire and sodder(sp) another wire to it and ground it to the chasis. I'm going to do this in the next couple of days. I'll let you know if it quiets the pump down any.

 

Fuel starvation. That little intermediate tank is always full and fuel can't slosh away from the pump pickup like in the big tank. You can therefore run less fuel in the main tank without worrying about your fuel pumps not being able to send a constant supply to the engine.



Have you ever gone around a corner with the fuel needle on "E"? If you're really low you might get a few stutters and jerks because your fuel system just ran dry. Once you finished the corner the fuel flowed back into a position where the pickup could reach it. Now just imagine doing that at 20 PSI coming at of a corner onto the back straight.

 

BTW, you really don't need a "huge" pump to fill that can. Since it is not pressurized, a small pump can keep up with the 2 larger pumps feeding the injectors.



And that fuel setup in the picture is so far from legal in North American racing it's not even funny. Very purty though

 

Since I wired up the haltech, I did ground the pump to the chasis.

 

Fuel starvation. That little intermediate tank is always full and fuel can't slosh away from the pump pickup like in the big tank. You can therefore run less fuel in the main tank without worrying about your fuel pumps not being able to send a constant supply to the engine.



Have you ever gone around a corner with the fuel needle on "E"? If you're really low you might get a few stutters and jerks because your fuel system just ran dry. Once you finished the corner the fuel flowed back into a position where the pickup could reach it. Now just imagine doing that at 20 PSI coming at of a corner onto the back straight. [/quote]

I see. Thanks for the info.

 

what is in the spare well?