4 Cylinder OHV Engine
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- Опубликовано: 22 авг 2024
- A short video showing the new stainless collector/header that I made. I had wanted to do this for some time but didn't have much luck bending the tubing. I built a tubing bender and finally made the parts. It is silver soldered together. The sound has changed somewhat but the video doesn't do it justice. This movie clip is from the carburetor/distributor side of the engine. You can see the distributor advance when the throttle is opened.
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.
@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When I originally made the engine there were no commercial spark plugs available so I had to make my own.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).
Nice that the timing is adjusting while you open the carburateur. Nice work all over the engine! TOP
The cool thing with machining parts from bar stock is that you get as many tries as you want in order to get it right. "We learn from our mistakes" takes on a significant meaning when you are teaching your self to make good parts with a lathe or mill. My second engine was a four stroke and I had more success with it than a "simpler" two stroke. I"m of the opinion go for the project that most motivates you, and you are more likely to get it done...eventually.
i love your engines but this engine has the coolest sound of all your engines
Sir, that is another impressive piece of handy work. You are an true artisan.
amazing sir, it's people like yourself that made America great. a hard working man with a great mind can make amazing things happen. thank you sir.
The distributor moves when you rev it. Torquey little 4 banger heheh
@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.
What a beautiful engine!
Love this little 4 cylinder Mr Britnell, I’ve watched this vid a dozen times, haha
-jon cook
that engine sounds amazing! great throttle response too.
Man if you are skilled and wise enough to build that engine, then you should try to put a supercharger on it.
George could build a supercharger easy ….but why....in the same amount of time he could build another engine he likes & add it to his collection.
Sounds bloody awesome
@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.
@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.
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.
Yes sir, all of my engines were machined on manual machines, mill, lathes etc.
still makes more power than a civic
you posted the same comment on the last vid i watched pmsl ....
What does that engine work in???
@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.
Everything was made by hand, by me. The parts were all machined on manual machines, not CNC. Contact me for the available drawings.
On this particular engine I have a linkage from the carburetor to the distributor. When the carb is opened it advances the timing. Base timing is about 14 degrees and full timing is about 28 degrees.
@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.
No, it has a set of points in the distributor. They trigger a small electronic ignition powered by a 6 volt battery.
It's not the cost of the material that makes them expensive but rather the time involved. In this engine I probably have no more than $200.00 in material cost, aluminum, steel, gears and spark plugs but I have around 800 hours of design, drawings and building so multiply that times whatever hourly rate that would be reasonable and you get an idea of the total cost.
To answer your second question, yes, it would fit in a large RC truck.
@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.
@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.
Yes, the carb linkage is hooked to the distributor to give me advance.
Look at that tiny carburetor!
Yes they could be sold or rebuilt but the many hours it takes to build one makes it very costly. I have about 700 hours in this one. The only way that the time and cost could be reduced would be to program and cut the majority of parts with CNC, which I don't have.
bad ass man. Thing sounds awesome.
@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.
@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.
Fantastic! Sounds like a miniture ferrari GTO engine!
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 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.
it sound like a supercharged bumblebee... haha btw, nice mini engine u made there!!
Very nice A mini version of My 2.5 liter GM engine in My Chevy S-10
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.
A hit and miss engine running in the background LOL
@gbritnell hehehehe .... this seams to have much more soul than a pushrod engine.
so responsive
i love it.
@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.
Great Job and sounds asume.
Alec Ryals
awesome sound man
nice sound
a lot of work in there , my man !
fuicking nice sound , also !!!
Very nice.
super cool man good job.
This is amazing!
Would you ever sell these? Or build one and sell it? I find these very neat and I would like to have one.
incredible...
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?
I would love to see this in a go kart, I wonder if it would be more powerful than a normal 1 cyl ohv engine typically used for karts
Being that these engines are generally one off creations the cost would be whatever someone is willing to pay for it.
Thanks!
I have since changed the ignition and carburetion so that's why the increase in rpm.
@SthealthRaider
They're not all that hard to make. The size just depends on what the displacement of your engine is going to be.
love this
wow thats impressive!
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.
Amazing sound :-)
11,000 rpm.
Awesome👌
@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?
Ideal marine engine
Damn, everyone thinks they can just buy one of these. First, if you can, they are extremely expensive, and second, usually they are not for sale.
You know, i'd like to build my own from scratch but i have minimal machine working experience and i would not be able to machine out all the parts for such a project. I've been searching for a kit of sorts for something similar to this but no luck.
@gbritnell yep. i get it now. thanks for posting
Sound lovely, crossplane crank?
I still don't understand why they didn't put crossplane cranks in commercial 4 banger cars like "civics"...
@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.
The problem is that this engine and most like it are all scratch built by their constructors. There are few, if any, companies that machine and build these miniatures because the market just can't justify the cost of building them.
As a matter of fact it is a pushrod engine.
love your vids 30GB
You should build a turbo and intercooler for it!!!!!!
that engine sounds so angry
It was made from bar stock. No castings.
So you did this all on a manual milling machine?
@andrewstunna08
That's strange because I drew the drawings for this engine and I don't have a website.
I meant to reply to "doruxlakers" comment about searching for a kit.
It's 1.55 cu. in. .75 bore x .88 stroke
i would like to know ... how you drilled the head, to get the liquid cooling working ... any plans online?
Could you change the crankshaft and the camshaft out for a 90 degree (not 180) V8 design?
i notice the dizzy moves as you rev it? is that how you get the ignition to advance????
Hey im very interested in building one of these. Where did you get the materials; pistons, heads, crank,cam ..etc?
Haha must pulled that thing outa a Honda, looks about the right size haha.. Just kiddin thats pretty cool
still more horsepower and torque than a civic.
Sounds like it has high compression ratio
Do you the plans available for this 4 cylinder engine? Or where can I buy the plans? I have a mini machine shop and I would like to try to do this challenging project.
you should make some cherry bombs for the 302
Are you still sell plans for this engine? I tried to message offline, but either RUclips has taken away that capability, or I can't find it. Thanks.
Jim McCorison yes I still sell them. Contact me at gbritnell@yahoo.com
Does it have an advancing distributer?
Were do you get plans to build something like that?
is that little lever right beside the carb for timing advance?
Hi George, do you know what the idle rpm is?
Hi there, I really love the look and design of your engine. Do you have any drawings that youd be willing to give to someone wishing to build this engine?
It can be used in RC models?
Just curious, were did you get the from. I would like to have one for my apartment.
how big is the displacement on this
great job btw
does this have a magneto
sounds like a powerful little fcker xD