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Published On: Jun 29, 2008 11:34 PM
Sun - June 29, 2008
Sun - February 24, 2008
Sun - February 17, 2008
This is hard.
It is difficult to work on a truck when there is
no covered area, the parking area is grass, it rains every third day, tornadoes
are near, it drops below freezing for a few days a couple of times a week, and I
have been sick.
I am trying, believe me.
I am trying, believe me.
Posted at 10:41 PM |
Thu - February 7, 2008
Warm front + Cold Front =
Tornados, some deadly tornados. Luckily, Mt Nebo
had only rain (LOTS OF RAIN) and wind. Atkins
and Clinton AR were hit HARD. Some of the other towns were wiped
out.
It is snowing again on Nebo with Jets flying over low in the sky.
It is snowing again on Nebo with Jets flying over low in the sky.
Posted at 06:14 PM |
Tue - February 5, 2008
BEER!
The ingredients for two batches of beer are on
it's way to me as I type this entry. One batch for St. Patty's day and another
for April Fools day.
My water at the house is currently being tested for the mineral content. Depending on the results, I may not use Hot Springs water. I will keep you posted.
My water at the house is currently being tested for the mineral content. Depending on the results, I may not use Hot Springs water. I will keep you posted.
Posted at 05:00 PM |
Thu - January 31, 2008
Electricity is nice in cold weather
It has been a few days, but the power is back on
at the house. And I have an internet connection where ever i roam! Once the
house warms up and I have hot water, i will post more.
Posted at 07:52 PM |
Thu - January 24, 2008
Fuego would be impressed
For the low angle ropes rescue training, we went to
Mt. Magazine State Park, the highest point in Arkansas. On the first day of
training, the roads were so icy that the Rangers and other staff were sliding
off the road. Therefore, they canceled day one. It has not risen above
freezing since Sunday with this morning temperature registering in at 10˚
Fahrenheit. Mt Nebo has not risen above freezing either, and winter weather
predicted for the remainder of the week.
We may not make it to ZERO, but we could have another round of snow.
We may not make it to ZERO, but we could have another round of snow.
Posted at 07:28 PM |
Wed - January 23, 2008
Freezing fog
I assume this weather phenomenon is the reason
that ice is forming sideways on the trees around here. And the rocks have an
smooth even layer of ice.
Posted at 07:23 PM |
Tue - January 22, 2008
The formula behind carburetion
(CID x rpm x VE)/3456=cfm
CID-Engine Displacement in Cubic inches
rpm-maximum revolutions per minute, or redline
VE-Volumetric Efficiency, how well the engine breathes. Most engines range from 75%-85%.
cfm-cubic feet per minute. How much air the engine pulls through the carburetor.
The closer the engine cfm and the carburetor rated cfm, the more efficient the engine runs.
So, the truck starts here.
I know the displacement but I have to guess at the max RPM and VE.
(250 x 4500 x 75%)/3456=242.
The one carburetor, a Rochester Monojet, originally on the truck has a cfm rating of 210. So even with the conservative estimates on max rpm and VE, the truck was under carbureted.
After replacing the old exhaust manifold with tube headers and the old intake with a more efficient design, the truck does breathe better. I do not know an exact amount, but I will assume at least 5% better then before. The engine was bored out .030 in. when rebuilt, so now it has a displacement of 258. Using the formula again…
(258 x 4500 x 80%)/3456=283
If I use three of the stock sized carburetor, the rated CFM needed will be 630. To achieve this cfm from the engine, I will need to improve the VE to 122% and build the engine to withstand 7000 rpm. The only way to achieve above 100% VE is to install a supercharger or Turbo. Since a both improvements cost a lot of money, I will choose another route.
The Monojet carburetor has a smaller version that is rated 160 cfm, so three of these carburetors handle 480 cfm. Seemingly easier numbers to achieve.
To come close to these numbers I would need to….
Increase rpm to 7500 at 80% VE
Increase rpm to 5500 at 105% VE
Since this is not an exact science and there are factors that I have yet to apply to this formula (actual atmospheric pressure, true increase in VE, temperature of air entering the engine, etc.), I will allow for a margin of error of around 32 cfm.
Increase the rpm to 6500 at 80% VE or
Increase the VE to 100% at 5500 rpm
Now I am off to find the redline of an inline Chevy 250 with stock internals.
CID-Engine Displacement in Cubic inches
rpm-maximum revolutions per minute, or redline
VE-Volumetric Efficiency, how well the engine breathes. Most engines range from 75%-85%.
cfm-cubic feet per minute. How much air the engine pulls through the carburetor.
The closer the engine cfm and the carburetor rated cfm, the more efficient the engine runs.
So, the truck starts here.
I know the displacement but I have to guess at the max RPM and VE.
(250 x 4500 x 75%)/3456=242.
The one carburetor, a Rochester Monojet, originally on the truck has a cfm rating of 210. So even with the conservative estimates on max rpm and VE, the truck was under carbureted.
After replacing the old exhaust manifold with tube headers and the old intake with a more efficient design, the truck does breathe better. I do not know an exact amount, but I will assume at least 5% better then before. The engine was bored out .030 in. when rebuilt, so now it has a displacement of 258. Using the formula again…
(258 x 4500 x 80%)/3456=283
If I use three of the stock sized carburetor, the rated CFM needed will be 630. To achieve this cfm from the engine, I will need to improve the VE to 122% and build the engine to withstand 7000 rpm. The only way to achieve above 100% VE is to install a supercharger or Turbo. Since a both improvements cost a lot of money, I will choose another route.
The Monojet carburetor has a smaller version that is rated 160 cfm, so three of these carburetors handle 480 cfm. Seemingly easier numbers to achieve.
To come close to these numbers I would need to….
Increase rpm to 7500 at 80% VE
Increase rpm to 5500 at 105% VE
Since this is not an exact science and there are factors that I have yet to apply to this formula (actual atmospheric pressure, true increase in VE, temperature of air entering the engine, etc.), I will allow for a margin of error of around 32 cfm.
Increase the rpm to 6500 at 80% VE or
Increase the VE to 100% at 5500 rpm
Now I am off to find the redline of an inline Chevy 250 with stock internals.
Posted at 07:16 PM |
Mon - January 21, 2008
The day after
So today, I am having trouble walking. As
expected I guess. Today is the day to start on St. Patty's beer, but the beer
place is closed on Sunday and Monday. Oh well, something will happen, I will
not go with out Homebrew any longer!!
Posted at 06:11 PM |
Sun - January 20, 2008
SOCCER
I am again able to play some soccer in my free
time. Today, we played in freezing weather, and won. Not a pretty victory, but
a victory. I made it through the game with out any injuries. Keep up with the
action on http://www.arkansascentralsoccer.com
Posted at 06:03 PM |
Sat - January 19, 2008
Rescue 911
Today I received confirmation that I will be
attending a Low Angle Rope Rescue class next week. I will learn how to move
injured, or dead, people up and down a modest/short grade. The Park Ranger here
takes the procedure to another level by using the winch on his truck. Instead
of pulling a rope up the hill, he just hooks the the litter to the winch and
drags it up the hill. So when you come to visit I will be able to save you from
drowning, pull you up a hill, and provide extended first aid with duct tape and
a tree.
Posted at 11:48 AM |
Wed - January 16, 2008
She will be missed
Duchess ( aka wiggles, thumper, big girl, slut)
died a few days ago. Duchess was a Black Lab mix that kept Laura company and
wiggled whenever you arrived for a visit. She liked to be smacked around and to
wallow in the dirtiest water she could find. She was a stray that followed
Booda home one day. I do believe she knew she had a good life once she made in
the door of Laura's house.
Posted at 11:01 PM |
Tue - January 15, 2008
The Calendar
A
Calendar of other holiday s for your
enjoyment.
If you have other holidays to add, please let me know. Or other important holidays in future months let me know. This will be a monthly update. I know 'no pants day' and 'talk like a pirate day' are two I want to add, but I don't remember the dates.
If you have other holidays to add, please let me know. Or other important holidays in future months let me know. This will be a monthly update. I know 'no pants day' and 'talk like a pirate day' are two I want to add, but I don't remember the dates.
Posted at 11:09 PM |
Mon - January 14, 2008
Time is on my side
I just have more time since my commute is 2
minutes. I pulled out all the carbs out of the bucket and opened up the
Rochester Carb book. I may have picked the wrong carbs for my project. The
single barrel Solex carb on the boat has 18 pieces. The Rochester MonoJet carb
I am using has 59 pieces. The Monojet is original equipment so it should work.
I just have to figure out how to modify each
carb.
Should I go with a progressive linkage or a uniform linkage?
Should I go with a progressive linkage or a uniform linkage?
Posted at 10:30 PM |