Jan, what’s the length of a string? Well, it depends.
Same with the vacuum. I guess you could calculate it as something like (throttle × rpm × system restriction).
From what I’ve picked up and experienced, cruzing down a flat road at around 2000rpm in highest gear, with a 1/4-1/3 throttle will normally make the the motor pull 5-15 inches on a gasifier depending on the state of the charbed. Total vacuum close to the motor may be 20-100% higher because of filtering and such.
11 Likes
Warmed up to minus 10c so put another 45 miles on the truck, went to town for some birch. Here is a silent longer video of start up and switching to wood gas, I only have gas valve on the gasifier so I have to idle it up when I turn on gas.
Then I pushed it to about 23 inches of vacuum and hit 70mph, didn’t seem over heat or anything so might try to push it a little more next time, seems to run best at about 60 mph pulling about 15 inches.
22 Likes
I really gotta brag about you with that build. Everything looks factory with how nice it sits in that bed. I double like that lever you fabbed up for the gate valve.
Glad we’re starting to stretch our legs with some OBD2 vehicles, hats off bud.
17 Likes
Hello Dean.
Right now you are having to think before making the adjustments but after a while you will make the adjustment and not even realize you did it. Just like riding a bicycle.
Great job and my hat is off to you sir 
19 Likes
Very good video, Dean! Not only does your build look great, it’s a very clean build - to the point where I can understand almost everything I’m looking at.
15 Likes
What happens inside and is hidden from the eyes, and this is essential for good performance, I already wrote once: “precise manufacturing - good performance - more power”. 
15 Likes
Well I put another 30 miles or so on the gasifier and kind of abused it, pulled about 40inchs on it in passing gear and pushed it to 70 mph for a while, I’m gonna do some changes to it to improve some stuff but other wise it’s working good, wife says I’m a pessimist ( perfectionist)and it takes a lot to impress me but I’m gonna say I kind of like how this gasifier is working, and I just wanna say if if it wasn’t for Wayne and this forum and all the contributors Wayne , Tone and his tractor,Cody and Steve and Ben Peterson’s specs I used it prob wouldn’t have happened. Got to go build bridges for a few months now (I’m kind of lazy so I don’t want do do it but they pay me lots of money and I need the money)so I might not be working on it much till spring, might take it to work a couple times if I can chunk enuf wood.
Thanks guys.
Ps
Still will read lots but not post much if I don’t learn anything.
18 Likes
You keep doing that Im going to have to give you a job!!
LOL NIce work and well done!
14 Likes
Well bridge building got put on hold, we took equipment to local OSB mill’s dump site cause it was heating, so I was loading a couple rock trucks for last week and a half and moving and re spreading with cat, the mill guy told me they dump about 8 million kgs of the wafers a year here , what a waste.I took some for kindling ,Here’s a couple pics of the poplar wafers,they are about 4 inches long but only about .040 ( 1mm) thick do you think they would work in
a drizzler style gasifier ?I’m gonna maybe mix a bit in with chunks and try it when I go for a ride.
8 Likes
Hey Matt, is they any way a guy could get these poplar wafers to flow in a normal gasifier?or just some kind of auger and drizzle them in?
2 Likes
No its pretty much waste. You need to size fuel so that gravity can pull it through plus the density charge can not be too much or too little. If say you filled it with pellet fuel it would be way to dense, It will, run cold and over produce pyrolysis gas beyond what the reduction can handle plus not enough heat to crack this abundance of tar. Too large it just wont flow and you will just create Co2.
Judging by your unit you are probably going to need 1 to 2 inch chunks or a very meaty wood chip around 1 1/2 to 2 inches by 1 inch wide by 1/2 inch thick. Those shavings are just not going to flow and more than likely will not work all that well.
11 Likes
Thanks, yes my chunks are are about 2x2 or 1/5 x3 whatever works out to when I cut them …
8 Likes
Nice fire starting kindling.
7 Likes
I’ve logged wood for over 20 years for Weyerhaeuser til 2008 and I often wondered why all the tops which some are 10 inches in diameter weren’t burned for power or cogen in stead of being just burnt in the woods every year, this mill uses about 800,000 tonnes every year and over 25% is tops and limbs that get piled and burned the following year.
5 Likes
Ya I tried it tonight and it lit very fast, gonna grab a few bags to last me the winter.
Ps they dry it to 2% moisture so if you get it before rain or snow it’s dry.
12 Likes
Also I put another 40 miles on truck on Sunday and it worked just fine.I’m still amazed how good it works. Thanks to all the wood gassers who do this all the time.
15 Likes
Thats some pretty looking fuel you got there.
10 Likes
Tell me me again how come our fu#%in liberal a##hole prime minister is good , a straight skoal which I happen to enjoy is 36 canadian dollars and a 26 of cheap vodka is 30 bucks Canadian unbelievable.count yourselfs lucky.
7 Likes
Dean, among my fuel - chips from branches, there are many small twigs, bark and various fragments of wood, when I “pour” such fuel, there is no other difference than that the fuel level in the funnel collapses faster and that it is necessary to remove the ash more often . If I had such an opportunity, I would definitely test my gasifier on this type of fuel. You also have a built-in lower nozzle, which you can “turn on” if there is dusting with fine coal and ash below, or as a safeguard against tar gases.
Greetings
9 Likes