Fuel Cell

[syrushcw]

Ok this might sound a little weird but I havnt read about anyone doing this. Heres my idea Im going to have a tank of gas 93 octane and a fuel cell with 110(simple enough) Im going to run 2 fuel pumps one for the tank and one for the fuel cell duh. and im going to have each pump feed into somehting like this.

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then go to the fuel rail. Electrical is easy have a rocker switch w. enables 1 while disabling the other. The planning where im stumped at is the return line with out getting the gas mixed or actually heavaly mixed like the 110 goes back into the tank instead of fuel cell does anyone have an idea? I figured another y connector but I would feed somehow to block it off which isnt hard but I want to be able to do this all on the fly from the driver seat.
I m thinking make the return line come into the cabin then go to something like this

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where i can just turn around and change it but Id like to keep it all electrical w. a quick switch. Please give me ideas thanks.

 

[awdtalontsi1992]

Well you have a decent idea going but with a couple need safety modifications. You should at all costs not have any fuel lines in the cabin with you. Other wise it seems to be a good idea. The only other problem I see is that if you switch the fuel in the lines and rail will for a short time still be the fuel you are previously running. You would have to let the pump run alittle while till you can have the switched fuel completely filling the line.

As for the y blocks you are seeking I have an idea. Why don't you try the ones used for trucks with multiple tanks.....F-250, Dodge 2500, etc. They can be switched electrically like you pump safety from the cockpit so you won't have to run lines in the car. Also they are designed for gas so they should hold up just fine.

 

[syrushcw]

Well you have a decent idea going but with a couple need safety modifications. You should at all costs not have any fuel lines in the cabin with you. Other wise it seems to be a good idea. The only other problem I see is that if you switch the fuel in the lines and rail will for a short time still be the fuel you are previously running. You would have to let the pump run alittle while till you can have the switched fuel completely filling the line.

Like I said heavly mixed bc it will mix with wht ever is in the return line and I can think of a way around that So ill take a little delution(is this a word? deluted) over alot and Ill look into the connectors for the trucks sounds good

 

[awdtalontsi1992]

You could try putting the tank valves at the fuel rail. Then there would be less area to exhange and cause less delution (yes it is a word). The only downside is that you will have to run two sets of fuel lines. Good luck.

 

[syrushcw]

hmmm that might work the best put the y connectors diretly at the fuel rail but that would involve going to hit the valve switch under the hood. Any one else got any ideas?

 

[syrushcw]

Or does anyone know of an electrical valve? I cant seem to find one

 

[syrushcw]

Now Im thinking the best idea will be 2 fuel rails one for reg gas and one for 110 but the only problem is I have a new JMF intake mani that isnt tapped for a 2nd Fuel Rail wish I thought of this earlier

 

[99gst_racer]

Are you going to use this system enough to justify the hassle/cost of a second fuel system?

It's a neat concept, and it's definitely do-able.
But, if it were me, I'd design a better way to drain the existing tank, so swapping fuels is quicker and easier.

 

[baldur]

I had the idea myself to do this with a second fuel rail and a second set of injectors with their own fuel system just running off a different map in the ECU. High end ECUs allow you to run 2 injectors per cylinder and vary the split between them.

 

[syrushcw]

Well I was just going to turn all the injectors off on one rail. And I think of it this way I can drive to the strip on 93 and then when Im there use 110

 

[syrushcw]

But, if it were me, I'd design a better way to drain the existing tank, so swapping fuels is quicker and easier.

I'm up for any idea's these are the only ones Ive had so far

 

[99gst_racer]

I'm up for any idea's these are the only ones Ive had so far

Well, let's dig into this.

You're ultimate goal is to be able to run two separate fuels on your engine.
The issue is that the car is only currently set-up to run one fuel system.

The major deterrents I see with your original proposal is:

*Cost - Two fuel systems can be expensive. Double the tank/cell, pumps, injectors, lines and fittings, etc...

*Complication - You'll have to figure the best way to 'apply' the second system to the car, have an available engine tune for both fuels, and make it all easily switchable.

*Weight - adding another fuel container full of fuel, plus pumps, injectors, lines, etc... It all adds up. For drag racing, adding weight is never a good thing.


So, if your goal is to be able to easily run two different fuels, then I would recommend setting up the current system to be able to be quickly drained. If you can drain your tank with minimal effort, fill it with race fuel, and have the components (pumps, injectors, lines) interchangeable and large enough to support both fuels, then I would say that you've accomplished your original goal.

Using DSMlink, you can activate the fuel pump with the engine off. That is nice for emptying the tank, but it can be harmful to run a pump dry. I think it would be nice to have some sort of set-up underneath the car with a secondary pump and a pick-up that goes into the tank. You could simply attach a fuel hose that leads to a fuel container, power up the second pump, and evacuate the fuel tank. That way you aren't using your engine's fuel pump to do the work. It would ad minimal weight, and could be as quick as a couple of minutes from start to finish.

Just a thought.

 

[syrushcw]

Cost dosnt matter I rather spend the money the 1st time to do it right.

 

[awdtalontsi1992]

The solenoids to switch between tanks on trucks I described are electric. All you need to do is hook up a switch to them. You would run a wire to them from the switch. The switches are not directly attached to the solenoids.

 

[2gGSX]

Cost dosnt matter I rather spend the money the 1st time to do it right.

I'm not sure you understand just how much cost it really takes to do this correctly. Have you considered the implications of passing tech with a fuel cell? It is a LOT of money to spend just to avoid draining the tank and putting in race gas.

Also, if you have 110 sitting in there for extended periods of time, it will start losing some octane value (granted not as much as regular pump gas because of the lead content).

All in all, it doesn't seem practical. Are you doing this to switch on the fly in case someone pulls up next to you? In that case, you may be better off focusing on building a pump gas monster instead.

Just my .02 of course.

 

[syrushcw]

I think of it this way I can drive to the strip on 93 and then when Im there use 110

This is what

 

[baldur]

Of course, the best thing to do if you don't have 2 fuel systems is to build an engine that can make good power on pump gas. Low compression, a decent ECU and a good map.