Homemade Dyno, small engine DIY dynamometer

[@fernandohood5542]

I am good with electronics and programming. I could take what you have there and turn it into a pretty useful dyno.

[@ericthered9655]

Great job. A couple suggestions. I would get rid of the clutch and go with a belt you can lock tight by lever and tensioner. That will be more precise. Also, you might consider setting the fluid to a baseline resistance, and then using a flow sensor to turn flow into a voltage which can then be used in a formula to determine actual power.

[@bottomlinebassin2001]

The Honda GX390 claims 13, alot of people claim it actually only produces 11. Be cool to see that one tested.

[@josephleonard199]

Video is great. I really dug it. I'm not having much luck finding the math needed to turn the numbers in to hp/torque. Any help is greatly appreciated.

[@megoingfast]

It's in the part 2 video, of how to run numbers. ;)

[@cdiperformanceparts4364]

Great video, I am running my Honda clone on high performance cdi ignition system. You can adjust base timing and you have a preset by rpm 20° of full variable advantage . Also the spark duration changes a bit for more performances at higher rpm. I need to dyno my units I have made. Prototype stage but it's a direct stock bolt on with jet and intake kit. I have a channel if you want to come take a look. Cheers

[@maarten_notjustagrip]

I plan to use just such a system to regulate speed on a commercial rail Pedal cart. A kind of "Anti Runaway Brake. I considered a centrifugal clutch as the load, but they are too imprecise and fallible. As a Heli Engineer, this system makes sense. its gonna take some testing to find the right ratios, but hey, that's RnD. I KNEW there had to be a video...haha I wish I could put pedal assist e bike guts on it and use the regen braking, but that would be a powered vehicle and put the cart in another bracket entirely.

[@rafalpysiek]

Do you think that's will be a goood setup for tuning a chainsaws?

[@francoisdelport62]

What is the name of your second video?

[@williamsholders3351]

Did you ever try a larger HP motor on this DYNO

[@jcook8191]

Very cool build 👍🏻

[@bernesesennenhund9364]

Caution, FWIW, the pump's input shaft only has sleeve bearings. Those aluminum pumps are made for in line or face to face driving using a spider coupling. No chain. Aluminum pumps aren't made for side or what's known in the trade as an overhung load, such as your setup. www.hydraulicspneumatics.com/technologies/hydraulic-pumps-motors/article/21883204/dealing-with-overhung-load www.surpluscenter.com/Hydraulics/Hydraulic-Pump-Mounts/Overhung-Load-Adapters/ A portion of the pressure the pump develops will be transferred to side loading it's input shaft because of the pull of the chain by the engine. A lot of use will wear the sleeves and seals out and start to leak in time and the gears inside will start to gall the housing putting metal shavings into the oil because of the close clearances. Side or overhung loaded pumps are available but expensive since they use hydraulically sealed radial ball bearings and accommodation of a drain port. I'd recommend to unload the input shaft and spending the 40 or 50 bucks and turn your pump to face the motor and install a spider coupling or an overhung load adapter. Just my 0.02. Be safe !

[@bernesesennenhund9364]

... Also you could also move the pump back and use a jack shaft arrangement supported by 2 pillow blocks, your sprocket on the input end and a spider coupling on the other driving the pump. This would allow you to use different engines and unload the pump input shaft. I've also seen creatively engineered setups using CV joints from the front ends of cars or ATV's as a flexible way to hook up different motors.

[@Armilite1]

Wouldn't a Direct Drive Cog Belt Drive be Safer?

[@marywalsh9111]

Interested in helping my husband build one. I'm unfamiliar with the parts you use so trying to keep up by writing them is difficult. Anyway you could reply with an exact supply list or does anyone here have a supply list??

[@bosshoggett]

Not the chain stretching, its the clutch slipping. Your applying more torque than the clutch is creating in drag.

[@Armilite1]

What is the HP you can Dyno with it? Singles go up to about 676cc today.

[@megoingfast]

Just above 20 with that pump. Different pumps that can go higher rpm can go higher power but it gets more expensive by a couple hundred dollars or more.

[@Armilite1]

@@megoingfast A Honda/Clone 460 Single with upgrades Dynoed 37.37hp@5000rpm. What Size Pump would be needed for say 45hp.

[@Abricos4440]

Cool...

[@randyreina5704]

How I can calculate the formula for knowing how much hp make

[@darviin9470]

(RPM x TORQUE) /5252

[@coreyhigh6157]

Still, I have no fucking idea. How are you measuring the power limit or level

[@megoingfast]

Part 2 video should explain all details for use. PT 1 was making and part 2 was using. ;)

[@andyxox4168]

Easier to use a small generator and resistive load than mess about with hydraulics ...

[@coreyhigh6157]

What would a small generator apply to apply to a Dino? Because I don't understand how he's measuring the power outlook LO. L

[@andyxox4168]

@@coreyhigh6157 . Measures power, simple!

[@RPmotorcars]

Cool but a briggs or a predator, tillotson, tecumseh ect all rotate in the same direction, clockways if looking at flywheel and counter clockways while looking at crank, there not opposite of each other... 😉

[@NBrogdon45]

Wrong! The video is absolutely correct. I've had several older Briggs and Tecumseh engines that run clockwise from the PTO side 😉

[@pauls5745]

@@NBrogdon45 well we put these with chain coming off the left side direct to the wheel so counter clockwise for most side shaft utility engines

[@TheSkunkhill]

question why a helmut

[@megoingfast]

I have an irrational fear of bees and talking to my neighbors. If I see a bee or neighbor, I close the visor. Problem is I don't know what to do if I get a bee in the helmet with the visor down. Works wonders for neighbors asking questions like why did you put cannons on your go kart or a catapult, or an engine on your wheelbarrow, though!

[@FamilyMotorsports87]

i do love me some edumacation lol

[@coreyhigh6157]

Little diviers, he's not using a pillow up beach and converting it to American mechanical. Horsepower you can get healthy ones for twenty bucks or you can assemble A unit which uses American pieces 30 bucks for the gauge 120 bucks for the box with. Wires and brain intercourse, power source and grounding wires.

[@tat2joeelliott]

WTH is up with the helmet

[@rockwolfdesigns6384]

So what's with the helmet? Are you in witness protection?

[@megoingfast]

They can't protect me from the aliens trying to steal my brain waves. The helmet is lined with lead.

[@glennedward2201]

Little advice in the future don’t waste video time describing parts. Make a list and leave it in description. Keep the video for the actual build.

[@mr.a5147]

What's with the helmet ya dork.

[@megoingfast]

Ever watch the movie "Joe Dirt"?

[@DavidHoskins]

If you're going to wear a helmet so we can't understand what your saying at least complete the look with a set of water wings and a cape!

[@megoingfast]

The water wings make squeeky noises on the video and didn't work out, but I will consider the cape!

[@clort123]

This video is so bad. I'm trying so hard to give you a chance and you just keep listing "NPT blah blah" just put it together and type the list out like a normal person cheezits christ