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Old 02-06-2015, 09:05 PM   #1 (permalink)
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Vapor fuel continued desscussion!!

Hi everybody, it's been a while since I've been on, but just wanted to share something I found on the web.

Car gets 400+ MPG | Fuel-Efficient-Vehicles.org

I found this to be very interesting, and before you bad mouth it to much I just want to let everyone know that I tried this on my 150 rocketa scooter and had it screaming at 6-8,000 rpm. That was with just throwing it together with pvc pipe and not having the proper components to do a dessent job!! Oh and also I elliminated the carb all together!! I'll let you guys know if I get it to work or not!

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Old 02-07-2015, 08:30 PM   #2 (permalink)
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Commenting to follow the thread. I started skimming about half-way down the page.

If you eliminated the carb how do you throttle it? How do you get sufficient volume without heat or added surface area?
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Old 02-07-2015, 08:59 PM   #3 (permalink)
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Ball Valve!! it had no throttle linkage anyway. Also, I put a tube down into the fuel that allows air to bubble through so that it can help evaporate the fuel faster depending on "throttle" position. I had it running really good today for about 10-15 minutes, but then i decided to try something else to see how it would work and it hasn't run right since.however i do have an idea why, i just need to get the stuff to see if it will work. I'll let you know how it goes!!

Last edited by stovie; 02-07-2015 at 09:10 PM..
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Old 02-08-2015, 12:19 AM   #4 (permalink)
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Ok, i was looking online at other examples of the vapor setup to see if i could get a better idea of what i was doing wrong and found out that i should first use a glass jar so that i can see whats happening(i was using 2" pvc pipe) so i used a quart jar i had available. I then needed to put something in it to absorb the fuel so that it will create more area for the fuel to evaporate, so i used a wash rag. Then i cut a 1 1/8th inch hole for some 3/4 pvc pipe(out to engine) then another smaller hole for 1/4" dripper hose(in) and put the end of it under the wash rag to reduce splashing in the jar. Then it's just a matter of controlling the air intake valve to adjust the throttle. I got it running really good now!! I need to get the throttle setup for riding, right now i have no way of controlling speed.
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Old 02-08-2015, 02:50 AM   #5 (permalink)
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Is the ball valve on the 3/4" side or the 1/4" side? You might want to put a cage around the glass jar so it doesn't get broken. This is a 150cc engine?

From the article; extrapolating up from 4oz of fuel to a gallon is backward; it should be multiple gallons averaged down. However you consume it, calculating mileage is not trivial. It involves headwinds, barometric pressure, etc.
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Old 02-08-2015, 02:59 AM   #6 (permalink)
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It's on the 3/4" side between the jar and the engine. I'm not sure what I'm going to do about the jar yet! 1/4" ended up not being enough for the engine, so i got a large mouth jar and drilled 2 1 1/8" holes for the 3/4" pipes. All i need now is a cable to the ball valve and i can take it on the road to test it's fuel usage and if it runs smoothly or not. So far it's been really easy to adjust the idle speed and rev the motor in the driveway but i'm not sure of it's power yet. It is a 150cc
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Old 02-08-2015, 07:19 AM   #7 (permalink)
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FuelVapor Technologies - fuel efficient vehicle automobile high mileage
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Old 02-08-2015, 11:30 AM   #8 (permalink)
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This car makes a more realistic claim, but for it's size and aerodynamics I think any normal modern 4 cylinder without EPA emissions would get similar results. In the article they talk about the a/f being over 20:1 which is supposedly impossible without "vapor technology". Mitsubishi has a factory lean burn system that goes as high as 26:1. Any car could be tuned to use these kind of a/f ratios especially without EPA rules. That car says low CO2 but how's it's HC and NOX doing?

I still don't get the point of trying to make gasoline into a vapor before the compression stroke on a correctly tuned motor will do it for you. If you want an easy to vaporize, safe proven fuel then why not propane?
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Old 02-08-2015, 02:21 PM   #9 (permalink)
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Quote:
I'm not sure what I'm going to do about the jar yet!

Use a fuel filter (off a diesel locomotive?) and mod it with a float and needle valve from a carburetor.

Quote:
So far it's been really easy to adjust the idle speed and rev the motor in the driveway but i'm not sure of it's power yet.
I was wondering about shifting gears.
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Old 02-08-2015, 06:28 PM   #10 (permalink)
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Quote:
Originally Posted by Hersbird View Post
This car makes a more realistic claim, but for it's size and aerodynamics I think any normal modern 4 cylinder without EPA emissions would get similar results. In the article they talk about the a/f being over 20:1 which is supposedly impossible without "vapor technology". Mitsubishi has a factory lean burn system that goes as high as 26:1. Any car could be tuned to use these kind of a/f ratios especially without EPA rules. That car says low CO2 but how's it's HC and NOX doing?

I still don't get the point of trying to make gasoline into a vapor before the compression stroke on a correctly tuned motor will do it for you. If you want an easy to vaporize, safe proven fuel then why not propane?
Before it died in a flood, my car did 26:1 at cruise. All tuning.

And ditto on propane.

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