Why do you never see people do this? It shouldn't be too hard with an EMS with map switching to have 1 map for pump and 1 map for race, and have the EMS switch to the race tank when maps are switched.

What I'm thinking of doing is having a second fuel tank, maybe abould 2 gal. to keep weight down to do this. I would think this tank would have its own pump and seperate lines T-ed in along with the regular system at the fuel rail. Ideally I'd like to have it set up for 1 button map switch, fuel tank switch, boost control switch and open an electronic cut out. This way you could run full exaust w/ cat, pass emissions (F Con Pro), and be quiet. If you flip the switch though you switch to VP-import, open exaust, high boost and haul ***.

It seems as if this would be a killer set-up. You don't have to worry about the dangers of meth or the availability of E-85, plus you can be stealth with the full exaust and OBD2 of the F Con.

Would it work, and if so why isn't it being done? Sure the tank, pump and lines, not to mention the EMS would make it more expensive than meth or E-85, but it seems to me that it would be worth it. Are there any holes in this system that I'm missing?

 

What about FPR's and fuel return?

 

Because the fuel system would be much more complex then you think.

You forget the fact that many fuel systems use a return line to dump unused fuel back into the tank. So you would need 2 valves that had a delay timer so the second, smaller fuel cell would not become contaminated with lower octane fuel.

 

Complicated yes, but doable right?

 

sure, but will it be effective in the way that you want it to be.

If you want to use it as a secondary fuel tank at the track... sure! But then you have all the extra weight.

If you want to use it at the drop of the hat (ie: on the street), no... will not work that way due to the delay you will have to make it safe.

 

Do-able yes if you have the time and $$$$$$$$

 

With seperate lines, pumps etc and the systems only comming together at the rail, wouldn't you only need minimal switch over time, say a few seconds? I'm not planning on using it like a nitrous button or scram boost (while under heavy load or WOT), just regular driving with pump, then switch over to race when I wanna have a little fun(no tracking except maybe a 1/4 once in a while), then be able to switch back when I'm done.

 

it would not be wise to plumb the system together. How would you seal them from each other with out the fuel systems cross tank feeding? It would be far easier to keep them totally separate and run 2 rails with separate injectors. Double rail/injector intake systems already exhist.

 

Will cost you 3-4k.

You need two pumps, two feed lines, two returns, its messy, expensive, heavy.

Scorke

 

Wanted to keep the stock look with a Wilson manifold, but if a seconday rail and injectors were called for those guys could probably do it.

 

sure, and using manual valves would make it 10x more easy.

Key is finding valves that will hold up to fuel and pressure... then never making a mistake with opening and closing them properly...

Oh yeah... and you would need another way to monitor fuel levels.

 

I see but i don't think a fuel pump (off) will create the seal needed to "T" the systems together. fuel pressure from either system would back feed right past the pump into the others tank. only way around that is to incorporate some sort of 2 way solenoid that switches with the pump activation and make that your "T" (which doesn't look stock either). See how this is getting complex fast

 

thats one of the easy things.

 

yep, There have been plenty that have thought about it and if you think long enought you see that its not worth it.

Better off buying a drum of race fuel and keeping it in the garage

 

I keep it by the 5gal can.