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Old 06-15-2022, 12:04 PM   #1 (permalink)
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Fuel drop size pic 45mpg visualization

I was wondering what the amount of fuel would look like on my 2.0L engine while getting 45 mpg. This is for one cylinder, one cycle.

Pretty darn crazy how small it is.

This weekend I'm going to test what the amount of heat it takes to get full atomization on my fuel generator.

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Old 06-15-2022, 12:18 PM   #2 (permalink)
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Seems like a lot. How much does it weigh?
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Old 06-15-2022, 12:40 PM   #3 (permalink)
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Seems like a lot. How much does it weigh?
Crap nice catch that was the wrong pic lol
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Old 06-15-2022, 01:03 PM   #4 (permalink)
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Nice wood finish in the background.
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Old 06-15-2022, 05:23 PM   #5 (permalink)
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Now I can see that being less than 15:1 of the air in a 250cc cylinder at around 1/2 atmospheric pressure.
1L of air weighing about 1gm, but it's only half an atmosphere, each cylinder is 1/4 that, should be looking at about 0.008gm or less of fuel there.
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Old 06-15-2022, 09:11 PM   #6 (permalink)
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Nice wood finish in the background.
LMAO
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Old 06-15-2022, 10:36 PM   #7 (permalink)
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Quote:
Originally Posted by oil pan 4 View Post
Now I can see that being less than 15:1 of the air in a 250cc cylinder at around 1/2 atmospheric pressure.
1L of air weighing about 1gm, but it's only half an atmosphere, each cylinder is 1/4 that, should be looking at about 0.008gm or less of fuel there.
Here is the math I used.


33:1 AFR
100kPa Intake pressure
4.75 lbs/min total air
0.144 lbs/min total fuel or 65.41 grams/min total
65.41 grams/60 to get seconds = 1.09 grams/sec total for all four cylinders

2800rpm/2 = 1400 cycles per minute
1400/60 = 23.33 cycles per second
1.09grams/sec / 23.33 = .0467grams for 1 cycle all four cylinders
.0467grams/4cylinders =.0117grams for one cylinder and one engine cycle.

I then used a calc online for compounds and it converted .0117grams to 0.01 milliliters for petrol. I then looked up IV gtt numbers and found that 11 drops = 0.55ml.

I tried to simulate the IV drops so its probably not to the gnat's ass lol
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Last edited by pgfpro; 06-16-2022 at 12:50 AM..
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Old 06-16-2022, 12:11 AM   #8 (permalink)
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Quote:
LMAO
I was completely serious. The 'wrong' picture had a black finished frame. This one has a really tight miter joint.

If you zoom in and fill the frame I'd be less likely to go off topic.
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Old 06-18-2022, 01:31 PM   #9 (permalink)
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Quote:
Originally Posted by pgfpro View Post
I was wondering what the amount of fuel would look like on my 2.0L engine while getting 45 mpg. This is for one cylinder, one cycle.

Pretty darn crazy how small it is.

This weekend I'm going to test what the amount of heat it takes to get full atomization on my fuel generator.
Well just finished my fuel atomization test. I used 87 pump E10 gasoline. At 120*F full visible droplets right side pic. At 252*F no visible droplet or even fog left side pic, so I would say it's in a gas state.

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Last edited by pgfpro; 07-02-2022 at 02:48 AM..
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