Yes I have a linkage from the bottom of the carb to the distributor. By changing the angular position of the arms I can vary the amount of advance. Right now it is about 15 degrees at slow speed and 35 at high speed.
That is some incredible talent you have. Was this designed in CAD and was a CNC used? The parts must be tiny. Seams like there are a lot of people who would buy these for models.
At the time I built it I had no idea what CAD was no less CNC. It was all done from my own sketches. A number of years ago when I got a CAD program I redrew everything so that I would have a compete set of drawings for it. Some of the parts are small but not excessively.
how much do you want for the palns for this engine the 4 cyland i can also give yoyu some mini chopper plans that you would probaly be able to use the engin in.in return
do you think it would work if you made a reducer the the o.d. of the fly wheel to a 3/4 i nch i d so you could fit a centrifugal clutch on it. if you you could it would work good for a drive shaft to a differnatial on a rc car
sorry if im assuming . and thats a great build. yours may be a little bigger but can you look at the engine on there and tell me the differnce between them
That engine was designed and built by a fellow on the HMEM board. If you go there you will find the complete build, test and refinement of that engine.
Mine is a little bigger but they both have similarities.
@andrewstunna08 This is just fantastic :-) You have done a wonderful piece of work there, I love it. I have been looking for things like this for a while now as i think a possible application these small engines is to place them in the RC construction kits that have working hydraulics.
hi my name is andrew. im gonna be buying a mini lathe. maybe you can tell me what lathe is the best for the projects. and also could you send me the plans for this engine. i would apprecaite it. and i can give you some plans for mini bike builld and 12 differnt mini chopper plans. thanks
When I originally made the engine there were no commercial spark plugs available so I had to make my own. Now there is a company manufacturing miniature plugs but they're quite expensive. I made the distributor. The first one I made had point in it and the one that's on it now has a Hall effect trigger (magnet and pickup).
Yes the distributor is connected to the throttle linkage. By changing the position of the levers I can control the amount of advance the engine needs. The carb is a very simple air-bleed type. It has a needle to adjust the full throttle mixture and and air bleed port to reduce the vacuum signal at low speed so it doesn't go overly rich.
I experimented with several different carbs, mostly model airplane carbs of different designs, some simple some more complex. It took a lot of tinkering to get to where it is today and it's still off a little bit but these things are picky about running well all the time. One day they seem to be spot on the next day they're just not close.
The problem with model airplane carbs is that they're made to run an alcohol, methanol type fuel so the needle valves are a little coarse.
this thing sounds AMAZING!!!!! GREAT work...i want to build just a simple single cylinder 4 stroke...but i only have very simple tools...(no lathe, milling machine, or drill press...) i do however have an old shopsmith. is there a bit or something i could buy for relatively chead that i could use toconvert it to a metal lathe instead of wood?
you could put the engine under load (use some kind of flywheel brake/your fingers?) and rev it up through the range of the engine, i bet it would sound awesome.
The material cost was minimal. The total cost would be for all of the hours it took to design and build it. I estimate that I have around 700 hours of time invested in this engine so multiply that by whatever a good hourly rate would be to determine what it might cost.
The head has no cooling. Just the block. To try and put water through the head would take quite a bit of work trying to get around all the ports, pushrods and studs. With an adequate sized radiator it would run for quite awhile without getting too hot.
They are machined from solid material, aluminum, steel and iron. I designed this engine myself. It has a .75 bore and a .875 stroke. You need a milling machine, a drill press and a lathe to build one. This engine has about 700 hours of building time.
To advance and retard the timing just like in a full sized engine. The faster an engine spins the more (advanced) timing it needs. This engine runs about 12 degrees advanced at slower rpm's and almost 30 degrees at full throttle.
@gbritnell Iget it now. in a full sized engine, there are weights under the rotor of a normal distributor to advance the timing. the body is clamped to the block. you dont have a centrifugal advance in that tiny distributor, correct?
There are 3 stages of advance, initial, vacuum and centrifugal. These little distributors are too small to incorporate these features. Being as the carburetor is in line with distributor it made it convenient to add some linkage to move it.
I use 89 octane pump gasoline. Being that the compression is a little higher I went to that from 87 octane. It's not that I could make out any difference but just thought it might help a little.
i notice the dizzy moves as you rev it? is that how you get the ignition to advance????
BigCarKilla 6 hours ago in playlist Uploaded videos
@BigCarKilla
Yes I have a linkage from the bottom of the carb to the distributor. By changing the angular position of the arms I can vary the amount of advance. Right now it is about 15 degrees at slow speed and 35 at high speed.
gbritnell 4 hours ago
@gbritnell it's hard enough designing it in CAD, the fact you didnt use it or a CNC to create the parts is astonishing...
FJSchrank 1 week ago
Very nice A mini version of My 2.5 liter GM engine in My Chevy S-10
chuckbear1961 3 weeks ago
holy crap! the advance is linked to the throttle! nice man! nice
plasticspastic201 4 weeks ago
sounds like a powerful little fcker xD
HitmanContracts57 1 month ago
Haha must pulled that thing outa a Honda, looks about the right size haha.. Just kiddin thats pretty cool
bighunt08 1 month ago
That is some incredible talent you have. Was this designed in CAD and was a CNC used? The parts must be tiny. Seams like there are a lot of people who would buy these for models.
FJSchrank 1 month ago
@FJSchrank
At the time I built it I had no idea what CAD was no less CNC. It was all done from my own sketches. A number of years ago when I got a CAD program I redrew everything so that I would have a compete set of drawings for it. Some of the parts are small but not excessively.
gbritnell 1 month ago
Sounds like it has high compression ratio
guwapo90 1 month ago
Full race engine?
guwapo90 1 month ago
how much do you want for the palns for this engine the 4 cyland i can also give yoyu some mini chopper plans that you would probaly be able to use the engin in.in return
andrewstunna08 2 months ago
@andrewstunna08
I really don't like to discuss business on Youtube. Contact me at gbritnell@yahoo.com and we'll talk about it.
gbritnell 2 months ago
turbo the fucker
iBikeSA 2 months ago
do you think it would work if you made a reducer the the o.d. of the fly wheel to a 3/4 i nch i d so you could fit a centrifugal clutch on it. if you you could it would work good for a drive shaft to a differnatial on a rc car
andrewstunna08 2 months ago
@andrewstunna08
A different flywheel could be made to incorporate whatever type of drive necessary to power an RC car or anything else for that matter.
gbritnell 2 months ago
sorry if im assuming . and thats a great build. yours may be a little bigger but can you look at the engine on there and tell me the differnce between them
andrewstunna08 2 months ago
@andrewstunna08
That engine was designed and built by a fellow on the HMEM board. If you go there you will find the complete build, test and refinement of that engine.
Mine is a little bigger but they both have similarities.
gbritnell 2 months ago
google that and it will bring it up
andrewstunna08 2 months ago
burleighmachine
andrewstunna08 2 months ago
burleighmach
andrewstunna08 2 months ago
there is a website that sells the plans to build this engine on a mini lathe and a mini mill mill machine
andrewstunna08 2 months ago
@andrewstunna08
That's strange because I drew the drawings for this engine and I don't have a website.
gbritnell 2 months ago
@andrewstunna08 This is just fantastic :-) You have done a wonderful piece of work there, I love it. I have been looking for things like this for a while now as i think a possible application these small engines is to place them in the RC construction kits that have working hydraulics.
jules61ryw 2 months ago
kl
andrewstunna08 2 months ago
hi my name is andrew. im gonna be buying a mini lathe. maybe you can tell me what lathe is the best for the projects. and also could you send me the plans for this engine. i would apprecaite it. and i can give you some plans for mini bike builld and 12 differnt mini chopper plans. thanks
andrewstunna08 2 months ago
@andrewstunna08
This engine is not something that could be made on a mini lathe or mill. Some of the parts could be but not the block.
gbritnell 2 months ago
Its water cooled!.... thats so cute!
marek0086 2 months ago
sweet sound!
articberryvodka 3 months ago
Put it under some load :)
0FlyingSwede0 3 months ago
This is by far one of the smoothest running and most powerful sounding model engines I've seen. Looks like you have the tune up just right. Nice job.
lucasoptura 3 months ago
If you could build me one how much would it be?(:
frogugly3 4 months ago
I can't glue 2 pieces of paper together but people can make working miniature engines that look like jewelry.
Jeeebus!
I feel like such a ham handed putz.
hammerogod 4 months ago
is that some sort of advance on the ignition? :D
Iam18yearsolddddd 5 months ago
can u put a carb per piston
96canon 6 months ago
sounds like a motogp
96canon 6 months ago
Cool scale engine and i sounds even very cool. Nice job. Ass a petrol head, it would be so cool to own a engine like that my self.
GTRdeamon 6 months ago
nice sound
lomtafix 7 months ago
i bet this has more power than a Honda lol
VivaLaEvo 8 months ago
you should make a miniature 4 cylinder turbo motor :D
PrestonWolff09 9 months ago
How do you make the ignition work is there spark plugs that small, and how the hell do you get distributors that small? (Please respond!)
MrBugattiw16 9 months ago
@MrBugattiw16
When I originally made the engine there were no commercial spark plugs available so I had to make my own. Now there is a company manufacturing miniature plugs but they're quite expensive. I made the distributor. The first one I made had point in it and the one that's on it now has a Hall effect trigger (magnet and pickup).
gbritnell 9 months ago
@gbritnell~ the dizzy is connected mechanically to the throttle??
Also, does the carb have transient-throttle-enrichment (throttle pump)??
marek0086 2 months ago
@marek0086
Yes the distributor is connected to the throttle linkage. By changing the position of the levers I can control the amount of advance the engine needs. The carb is a very simple air-bleed type. It has a needle to adjust the full throttle mixture and and air bleed port to reduce the vacuum signal at low speed so it doesn't go overly rich.
gbritnell 2 months ago
how did you know witch carb to put on it
123rcflyer 1 year ago
@123rcflyer
I experimented with several different carbs, mostly model airplane carbs of different designs, some simple some more complex. It took a lot of tinkering to get to where it is today and it's still off a little bit but these things are picky about running well all the time. One day they seem to be spot on the next day they're just not close.
The problem with model airplane carbs is that they're made to run an alcohol, methanol type fuel so the needle valves are a little coarse.
gbritnell 1 year ago
It would be really cool if you find a way to cool it, one of these would be really awesome in a scale model car or truck.
mopar43v3r 1 year ago
it sound like a supercharged bumblebee... haha btw, nice mini engine u made there!!
niceguydudong 1 year ago
this thing sounds AMAZING!!!!! GREAT work...i want to build just a simple single cylinder 4 stroke...but i only have very simple tools...(no lathe, milling machine, or drill press...) i do however have an old shopsmith. is there a bit or something i could buy for relatively chead that i could use toconvert it to a metal lathe instead of wood?
scbjgs 1 year ago
you could put the engine under load (use some kind of flywheel brake/your fingers?) and rev it up through the range of the engine, i bet it would sound awesome.
0FlyingSwede0 1 year ago
The material cost was minimal. The total cost would be for all of the hours it took to design and build it. I estimate that I have around 700 hours of time invested in this engine so multiply that by whatever a good hourly rate would be to determine what it might cost.
gbritnell 1 year ago
How did it cost?
polipochilegge 1 year ago
As a matter of fact it is a pushrod engine.
gbritnell 1 year ago
@gbritnell~ flat plane crank?
marek0086 2 months ago
The head has no cooling. Just the block. To try and put water through the head would take quite a bit of work trying to get around all the ports, pushrods and studs. With an adequate sized radiator it would run for quite awhile without getting too hot.
gbritnell 1 year ago
Sir, that is another impressive piece of handy work. You are an true artisan.
whorayful 1 year ago
now put that in a Baja 5T !
theseanster7 1 year ago
i like how the distributor rotates to advance the spark. cool design :D
jack9102 1 year ago
i love your engines but this engine has the coolest sound of all your engines
nordmensch 1 year ago
that engine sounds amazing! great throttle response too.
master777999 1 year ago
i'd love to build one of these lol!
Gibson299 1 year ago
how do you make theses engines
MOIVGSTER 1 year ago
@MOIVGSTER
They are machined from solid material, aluminum, steel and iron. I designed this engine myself. It has a .75 bore and a .875 stroke. You need a milling machine, a drill press and a lathe to build one. This engine has about 700 hours of building time.
gbritnell 1 year ago
OMG WHERE DO YOU GET THESE
LOL
THESE R SO COOL
Gibson299 1 year ago
why does your distributor advance/retard itself when you rev the motor?
turfshredder 1 year ago
@turfshredder
To advance and retard the timing just like in a full sized engine. The faster an engine spins the more (advanced) timing it needs. This engine runs about 12 degrees advanced at slower rpm's and almost 30 degrees at full throttle.
gbritnell 1 year ago
@gbritnell Iget it now. in a full sized engine, there are weights under the rotor of a normal distributor to advance the timing. the body is clamped to the block. you dont have a centrifugal advance in that tiny distributor, correct?
turfshredder 1 year ago
@turfshredder
There are 3 stages of advance, initial, vacuum and centrifugal. These little distributors are too small to incorporate these features. Being as the carburetor is in line with distributor it made it convenient to add some linkage to move it.
gbritnell 1 year ago
@gbritnell yep. i get it now. thanks for posting
turfshredder 1 year ago
i would like to know ... how you drilled the head, to get the liquid cooling working ... any plans online?
naturalyshocked 1 year ago
@gbritnell hehehehe .... this seams to have much more soul than a pushrod engine.
so responsive
i love it.
naturalyshocked 1 year ago
Angry little beast, very nice.
XELA2T 1 year ago
what fuel did you use?
patie132 1 year ago
@patie132
I use 89 octane pump gasoline. Being that the compression is a little higher I went to that from 87 octane. It's not that I could make out any difference but just thought it might help a little.
gbritnell 1 year ago
D: i wanna make my own 2 cil engine but the carb! i have no idea on how to make one
SthealthRaider 1 year ago
@SthealthRaider
They're not all that hard to make. The size just depends on what the displacement of your engine is going to be.
gbritnell 1 year ago
why cant they put these on rc trucks
kuhndog52 2 years ago
Comment removed
lkwdbusman 2 years ago
Amazing...that micro carburetor is tinier than the smallest Dell'orto moped carb!
What is the displacement?
justdoitasshole 2 years ago 2
It's 1.55 cu. in. .75 bore x .88 stroke
gbritnell 2 years ago
a lot of work in there , my man !
fuicking nice sound , also !!!
24NOTCEN 2 years ago
Fantastic! Sounds like a miniture ferrari GTO engine!
steamwally 2 years ago