FUEL VAPORIZATION, DOUBLES MILEAGE

[exxcomm0n]

@ all

Been thinking about this a bit lately (and that's never a pretty thing) and here goes.....

@ Dirt

Been wondering how to reuse most of the fueling system with this concept as my engine resources are not that deep.

The filling neck of the fuel tank is just right for either air filtration for bubbler air in OR fume/vapor out to carb, but could you just hook up air filtration to what used to be the fuel feed line and have that be your bubbler inlet?
Think the diameter of the fuel outlet would pass enough air in?

With enough craftiness and some simple machining a small engine could be switched back and forth without too much hassle.

I understand that the bowl screw is left out for extra air needed for combustion, but could it be filtered too with a PCV valve type breather filter?

How are you thinking of addressing it for the car?
Put the carb on a riser....no wait! Just have a tube from fume production entering through the air filter holder top (difficult, but doable) into the throttle body that's got an O.D. (outside diameter) smaller than the I.D. (inside diameter) of the throttle body allowing filtered air to be drawn on demand by engine vacuum.

I was wondering also if there was a way to (mechanically) cause draw on injector holes to be the same vacuum as air induction from the throttle body for an injector based engine.

One thing that I'll ask you (Dirt) to check out soon (well, sooner than I can) is how fumage induction works when it gets cold as gas has a tendency not to play nicely that way when hitting 0 degrees C and below.

I look forward to the V8 results Dirt, and where's them vids??

[dirt diggler]

Hi Ex,

Thanks for the idea's and the questions, you make some good points, the main one being temp related problems with our harsh winters, it is something we had thought of, and as we see it there are 2 simple ways around it. 

1:  heat duct off the exhaust, we use these on aircraft to supply cabin heat, and carburator heat, with a shroud on the gas tank, to slightly raise tank temp,  or

2:  fuel heater from a modern diesel, plumbed to recirculate the fuel out of the tank, through the heater, and back to the tank.

As far as the plumbing issues on the engine, it has yet to be seen exactly what will be needed.
There are other systems out there that just suplement the regular fuel delivery to increase efficency, but we are trying to do it with no outside source of fuel, so as we see it, all the existing fuel system will be removed from the engine.  This means either removing the injectors(on an injected engine), or at least the fuel line to the fuel rail.
Our plan on the V8 is to pump fuel, from the tank, with the stock pump, to our header tank in the engine bay.  This will be recirculated, with a simple line in, with a larger line out, back to the tank.  This will keep a constant supply of fuel in the tank.  The stock air filter will be retained, with the air being drawn into the sealed header tank, then to the top of the carb, or injector throttle body. On ours we plan to custom make a new tank in the engine bay, but,
as you say, there has to be a way to retroit old cars, and our plan there is to drain the tank, drill 10-20 1/2" holes in the bottom of the tank, and install on way check valves into the holes, with air lines running from those, to an air box and filter.  This way the fuel is drawn in at the bottom of the tank as needed, then just a simple adapter from the fuel gauge sender access cap in the top of the tank for the oulet air to the engine.

Hope you can make sense of my ramblings, I haven't got my coffee yet

ciao,  Dirt

[ramset]

Dirt  have you looked at Geet yet  70 water to 30 fuel same results can be retro    fuel vapor [gas ] can get pretty BUSY  without much help
flight 800 comes to mind [on jet fuel]  Chet

[exxcomm0n]

Heya Dirt,

I'm wish sure and strong caffination @ ya brotha!

The "cold" issue was to bring up the question of how do you use choke w/ fumes?

The heater idea gets back into heat excite we touched upon above, but unless it's like the diesel one, it'll still need boatloads of gas to start and run until heat up.

Careful with using the stock fuel pump as it's used to a specific duty and might overflow your fume generation chamber. Might not too, I dunno.

On the injector thing, I meant replacing the injecter with a straight tube in and then trying to redirect the vacuum to pull on the injector port and throttle body equally (or the applicable amount necessary).

Will using the fuel gauge access cap as an outlet mean you lose that functionality? (fuel level)

Good thinkin so far though Mr.

Kudos!

[starcruiser]

A Thought on this car mod,

How about using the secondary tank as Dirt suggests (I was thinking on this as well for a mod on my lawn tractor) and use an electric fuel pump and an injector to spray the fuel into the secondary tank, have the drain line at the bottom of the  secondary send excess fuel back to the primary tank.

The use of the electric injector would allow finer control of the air fuel mixture especially during demand. The injector could be controlled by a simple 555 timer circuit (pulse train/frequency) put a POT on the linkage of the throttle or on a newer vehicle by tapping the throttle position sensor to send control voltage back to the injector circuit.

What do ya think?