No wonder the fuel tank mounts kept breaking. Shakes like an earthquake from all that horsepower.

Out in the badlands put your windows up over 50mph, I bet you'll squeeze out an extra 2-5mph just cutting down the drag.

Having used an Arduino mega in some initial prototypes , interference causing the Arduino to hang was a persistent issue unless it was fully enclosed in a metal housing and any external connections used shielded cables. Being anywhere near a VFD for an induction motor meant issues were certain, for example. Great video thanks.

My mom’s ‘68 Karmann Ghia did zero to 60 in 30 seconds so your cement-mixer-motor gocart is doing pretty well!

"Anyway, that's enough tech for now" HERESY

Possibly do a 0-30 with 1st 2nd 3rd shift? Just to show the fans lol

Imagine it's saturday afternoon and you're in your kitchen making lunch when all of a sudden you get an alert for robot cantina. Hard to imagine anything better actually...

These are the type of inspiring videos that need to be taught in Automotive/Engineering/Metals classes.

I can't wait till we get that 670 in the machine! ITS GONNA BE EPIC!

Reminds me of the old Dutch DAF cars which had a CVT going to each rear wheel separately, no gearbox.

For your speedometer, get a bicycle one! They sell them for like $12 at Walmart. You attach the magnet to the inside of the wheel, attach the sensor in the wheel well close enough for it to read it, enter the tire diameter in the computer and you get a speed that gets updated every revolution, instead of a choppy GPS signal!

Knowing how well he does with these small gas engines, makes me want to swap a 20hp electric motor in my 84 Ford escort.

I can hear Eric O shouting - "It's got the big 420!"

14:20 - As an outsider your skill and calmness is... well, really it's watching a craftsman do his art. That being said it's crazy to think how hard we are on car manufacturers, they might have a few problems here and there but say even your old 1993 Chevrolet pickup rarely has issues except for wear items. A testament to how many engineers slave on these things to have a good end product.

SUPERCHARGERS!!! Cant wait for the episode of replacing the supercharger pulleys.

I happen to have fresh coffee and about 30 minutes to spare. You're about to entertain me. Thanks!!

Us Men are Crazy! Most of us have 300+ horsepower cars yet we are obsessed with this little 15hp Honda with a cement mixer engine! I Love it!

Absolutely worth getting out of bed for! Thanks.

Yes lets goooo an new amazing video!!!!!!

Its amazing what one man can do with one honda and one piston...

This has to be my favorite series on KZfaq. As someone who claims to be a mechanic, watching these videos has been very humbling and I feel like I'm learning a lot from it! Can't wait for the next video

How this channel ONLY has 66K subscribers is beyond me. I love this!!

That thing gunna run like butter after a table clean up

As soon as the tuning is done I recommend going to as many local car meets or shows as you can. You won't get any head turners over it's looks but people's minds are going to blow when they see what's exactly is under the hood.

IT'S very nice that you place this km/ltr. meaning kilometers per liter in your video for us metric guys BUT we're using Liters per 100km please consider that in upcoming videos...

The Arduino layout is notoriously prone to emi and transients. And a spark plug is noisy emi event. I'd put ferrites and shielding on everything, and maybe look into getting an industrial hardened version. Also maybe a resistor plug to limit noise.

Someone watching this got to 02:00 & is now shouting, "Look! That's my old lappy! I knew I should've asked for more! Mind you, at least it's doing something more than tick-tock."

Thanks for slipping the Nome back in. Great video can't wait to see how the turbo performs!

Supercharger boost formula is pretty simple. It’s the ((air the supercharger makes in 1 rotation / the engine air) * 14.7)-14.7. The air that the sc makes in 1 rotation is it’s capacity * pulley ratio. You can make an excel sheet with different pulley ratios to see what the sc will make.

Oh my god he said supercharger and now I seriously cannot wait every 2 weeks+ for updates. I hope your setup can run 7-9 PSI continuous to push that HP into the 20s! Cus I'm fairly certain that mathematically you're going to need it for sustained highway speeds without RPM/hours related wear issues.

16:18 That's really really really nice to include real units for the metric folks! Most people would want to read 5.3l/100km, though :-) (Which is the more logical way of displaying a fuel consumption IMHO: you need to cover a set distance and want to know how much fuel you'll need. Very rarely do you leave your house saying "I want to use two gallons, I wonder how far I'll go")

This reminded me I left my riding lawnmower outside to cool off. Need to bring into the garage. Thanks

Would be cool to travel around the country with that car to really test its reliability. I would love to watch a video where its just you driving the car for an hour straight. Keep up the good work!

next up, reuse the factory fuel tank instead of the little tiny one, range goes wild.

I love the series, really look forward to new episodes. I dont mean to sound like a broken record, but the cvt is not efficiently giving you power on 3rd gear take-off. Its designed to handle something like the ratio of 2nd gear at most, with that much weight. That is why it undershifts (overrevs,) then overshifts (underrevs.) A bigger torque converter with a bigger diameter secondary could help greatly. Or just a standard or centrifugal clutch, with proper gearing. Sorry for the long winded reply, thanks for the great content!

I have serious respect for your engineering mostly because of this little detail that you are utilizing the OEM transmission which so many people tend to not and I don't understand why it's just another gearbox to change more gear ratios to help you get the vehicle from point A to point B. And when you're utilizing such a small displacement single-cylinder engine any help you can get is very valuable

You got the attention of the guys over at Jalopnik, so I'm looking forward to seeing their comments. lol

A couple things I haven't seen you try yet. AC racing plug, hotter coil, billet flywheel (for higher rpm, stronger magnets, and safer at rpm above 3500). There is flywheel keys in different degrees of advance too. All these are ideas for more HP and MPG.

You could solder or braze a box from copper sheatmetal for the arduino. Put ground on it and isolate everything else from the case. That should do. A few low esr caps behind a big diode on the 5V input for decoupling might help further.

Man Jimbo, your content just warms my cockles! You do a great job all around, I am glad you're doing what you're doing! The "throwback to the episode" pan across the workbench is such a nice touch! Thank you so much for sharing with us!

based on my personal experience from MAP based tuning, I recommend you try hitting some partial throttle points (88 and 80 kpa). That will help stabilize your AFRs during WOT pulls so you get more consistent and smoother acceleration. Drops in atmospheric conditions will have your AFRs all over the place.

Shes getting quick , I remember a time not long ago it struggled to hit 40 mph

As always another great video, always a great watch

Gotta admit that your video editing skills are really getting good. Good job on your video, not to mention the progress on the vehicle.

"I do recommend watching previous episodes if you need to get up to speed" nyuk nyuk nyuk

What a treat. Coffee is made and wife brought me biscuits. Happy me.

Time travel stuff... nice touch :)

Thanks for including Metric conversions, but for fuel consumption, most countries use L/100 km. 45 US MPG = 5.23 L/100 km. Another great video, thanks!

Cant wait for the road trip across america

Now is the time on Sprockets when we dance! Mike Myers SNL

Your videos are very enjoyable... Keep up the good work!

awesome

You'll need to do proper gnd shielding for Arduino to prevent it from being interrupted by ignition system electro magnetic fields, and HV spikes. This is common thing on these. Just connect shield to negative terminal, and move whole thing as far as possible from coil, charging system etc.

Because of you I am putting the same speeduino on my predator 212

This has got to be one of the coolest engine builds on KZfaq.

Thank you for the great work!!

I feel confident that we are experiencing a level if rapid development far superior to Puegot and Fiat engineers. Right behind passing Hyundai; I estimate arrival at the Bonneville salt flats soon. Maybe there was some breaks and noise in the tps wave...wanted to zoom the raster display as fast as possible and had to stop myself from teaching through the screen. OCD&BP. Start with the drive and driven from a known install of course.

great project, I'm really enjoying watching your progress.

No garden gnomes were physically harmed in the making of this video.

For a go kart cvt it actually does a good job of keeping the rpm right around 3600 which most small engines peak at.

Speeduino is going to be how I keep my car going when the ECU fails. But actually thinking about "upgrading" now since it already has issues.

love this series of videos! Make sure you increase the gap on your rings!!!! when you ad boost, it makes more heat and pressure in the cylinder. When this happens the ring gap goes away, rings expand, buckle and break the piston. I have seen this happen,.. very not pretty!!! Best of luck!

Great episode. Seems like all you have left to do is make it faster.

Great videos, good production, thanks.

Yay a new episode

The fact that a power washer engine is pushing a car is just still unbelievable to me

I laughed when Dieter showed up in the section about the Sprockets 😅

Turbo the damn thing all ready.

Good progress. I suppose some power input shielding on the Arduino, some opto isolation on inputs and outputs, and perhaps some RF shielding on the PCB would preclude future corruption. Not exactly industrial grade electronics there, but easy enough to rectify the obvious weak points. Cable routing matters too. CANBUS uses differential signaling for a reason.

this is the best series for any motor enthusiasts what a great content dude

You are doing quite well, definitely on par with my Mitsubishi 2 cyl. 550cc micro van.

I've been driving you crazy about the nitrous oxide since you started it and you finally did it for me thank you!!👍👍👍👍👍😊😘

This will be awesome to see! I can't wait to see the performance improvement!

I've got a built 460cc stroker with billet everything, it's originally was a 420cc engine. I would absolutely love to do an EFI setup.

Should go order yourself an old lenovo t420 off ebay. I use them for tuning microsquirt ecus and they work great. No issues what so ever getting the COM ports to work with the usb to serial adapters either. Love the content man, cant wait to see what this does when you get that AMR supercharger on it!

I really want to do a project like this, it’s so cool and creative

Here's hoping he does a super-turbo setup!

I'm excited to see more! This content is great!

I have an idea. Often on performance videos there are idiots who get all worked up about ram air setups and how it will make 80 HP or whatever. On an engine that consumes all the air it is not much change but if you had a great big scoop... say across the whole front of the grill (i am thinking a big rubbermaid container with a hole cut into it to funnel it to the air intake). If you want to check it before committing much a pressure/vacuum gauge with the hose in the rubbermaid (with no holes) just to see how much pressure is possible at max speed without consuming any air. I think the magic of your experiment is the small displacement might make the dumbest internet or pre-internet power ideas plausible. I like the idea of those fake electric superchargers or the leafblower idea (maybe modify it so it doesnt "stall" under pressure but instead lets the leafblower motor stall). Perhaps even running it on RC car 15% or 30% nitromethane? Or pure methanol. Or Avgas. Or liquid propane. Or hydrogen. Or gasified wood... or gasified keurig cups (which are hilariously called recyclable). Or run on acetylene. Or misting waste oil into it. Maybe even of those atmosphere replacement air superchargers. Perhaps the next transplant idea could be a tiny diesel. If you do some googling of chinese "trikes". They use a diesel hit and miss engine on these ubiquitous farm wagons. With a diesel you could burn almost anything. The speeduino should be able to handle the control just with some creative circuitry to control an injector... maybe just run it by feeding into the intake? In non turbo configuration that should work.

I live to watch this project my favorite vids on KZfaq!!!!

I love these videos man. Keep up the great work, love the progress and all of the knowledge shared.

Also now that you have TS going, you can get virtual dyno to give you a comparison tool for tune changes.

Just an idea for the cvt. A stiffer spring can help kill that high end dip in power to come in a little bit later, and the guides on the rear pulley will help dictate how much of a drop in rpm can occur when the cvt is upshifting. A smoother angle can also help control the drop in rpms so you don't stay out the engines peak range.

These are great videos. I look forward to them!

Man you'll be on the interstate before you know it!! Love the vid and I managed to get it all in before I have to leave for work! 😎

You should use that shaft that hooks up to the front for AC compressor and alternator and power steering I think that shit would be sweet at least looking to it I love your videos

Really some of the best content on the platform

I would make the supacharger spin at 70% of its rated speed at max engine rpm. But a small turbo would definitely rob less power.

Can't wait for the super charger as I was going to order one for my Joyner 650 ... taking my turbo out as it needs rebuilt so was thinking it would put way less heat into the carb

Thank you

The Arudino crashing is likely EMI from the ignition, etc. Shielding (= metal housing), ferrite cores on I/O cables and some filtering on the incoming power should fix that.

(Volume per Rev of SC)* flywheel rpm: Volume per engine rev * FW rpm 1:1=1Bar You need a SC effeciency graph to dial it in.

I love your edits.

Oh and here is a CRAZY idea: put a CVT between the engine and the supercharger for a self balancing ratio

Good fun seeing what the 420 will do! Hyabusa just came to mind for another engine swap😉.

Damn. This is such a good build. I am literally down to see any way you take this. It seems like supercharging is coming next, but if you wanna tweak that fuel map and change sprockets I am all for it. Weight reduction would be cool too. I have yet to see anyone measure the exact weight they took off of a car vs performance gain. Whatever man just keep them coming!!!

16:16 we in Europe measures fuel economy in litres per 100 km (except British they buy fuel in litres but measures fuel economy in MPG but their gallon is little different that US gallon). 45 mpg US is 5.23 l/100km

At 8:55 it is very crucial that you see the content of episode 13 to understand the whole system!

Moving along, so to speak.

Keep up with the content!!