Episode 25. We take a look at our new speeduino NO2C EFI ecu for the 420 cc street legal go kart

hey welcome back to robot cantina first of all i'd like to thank you for all the comments and suggestions you folks gave on the oil cooling video it's great to have such an active audience so it looks like we're going to be doing a few more experiments in the near future why because experiments are fun and there's always something to be learned now if you haven't seen the last video yet or any of the other 25 videos they're definitely worth watching the premise of this video series is to get our little honda insight to go as fast as possible with cement mixer agent it sounds ridiculous and it is but someone has to do it now let's take a look at what we have in store for today as most of you know we're updating the ecu in our street legal race car with a speed duino ecu but what exactly is a speed duino well let's find out now the speeduino no2c that i chose for this project came from wtmtronix right here in michigan now just as a reminder i'm not affiliated with any of the products i feature and i paid full price for this kit however i will admit since wtm tronics is michigan based i went with them because well michigan and kid rock's also from michigan and who doesn't like kid rock so this is the heart of any speedwino efi system and it's an arduino mega microcontroller this micro has an 8-bit atmel 2560 running at 16 megahertz and it has an enormous amount of input and output ports these micros are very popular in the electronics community because they're inexpensive and they're easy to learn code on now this mega was 15 bucks and that's pretty cheap of course it's a clone and because arduino is open source that's fine now a genuine arduino mega runs about 40 bucks anyway the point is all the complicated stuff is on this pre-built board and the speed duino board is merely a signal conditioning board with passive components anyway wtm tronix offers a full line of speeduino ecu's and you can get them pre-built or in kit form unfortunately the no2c is only offered in kit form and that's fine but if that's not how you roll the ua4c is a little bit bigger and can be had pre-assembled plus you can also get an enclosure for the ua4c now there are of course other speeduinos out there but those are the two that i looked into so i went with the no2c because i like how small it is this ecu will work on one two and four cylinder engines but i don't know if it'll work on a three cylinder anyway this is the printed circuit board and as you can see it's the same size as the mega and that's just too cool now as far as i can tell there is no assembly instructions for this circuit board and they really aren't necessary the board is clearly labeled and all you have to do is grab a part read off the location on the bag and plug the part into that location on the printed circuit board for example these capacitors go in location c11 and c17 so all you do is locate the holes at c11 and c17 plug in the capacitor solder it and then clip off the leads and there you go there's the instructions now there are a few parts like this other capacitor that has to be installed a certain way and that's because this capacitor is polarized the capacitor's polarity is marked and also the circuit board is marked so that helps anyway there's a speed duino forum that can help if you get confused or need help in some other way so this is interesting the speeduno board has a map sensor built right in and this one's rated for boost now i do get comments from time to time and they go something like this jimbo the efi is too complicated and it isn't worth the hassle and yeah i totally get that but we have to look at the big picture and that is we're going to boost the engine with forced induction and yeah it can be done with a carburetor but efi is so much better so this is the little supercharger we're going to use and it's an amr300 and that means it's a 300cc positive displacement roots type supercharger the best part of this little supercharger is it has its own oil supply and that makes all the difference now previously we had planned on using a turbocharger to boost our 420cc engine but we're actually trying to build something that would last longer than a few episodes and the turbo presents too many problems the primary issue is the 420 engine doesn't have an oil pump and this turbo needs oil and yeah i've seen other folks run electric oil pumps but that's kind of sketchy at best and we're not going down that road but jimbo what about the oil pump you used on the oil cooler video nope that definitely is not the right kind of oil pump but keep in mind on the future 670 ccv twin build that engine does have an oil pump and guess what we just might turbo it so once again let's look at the big picture the supercharger needs efi and the supercharger is more likely to survive our shenanigans so we're going to take the path of likely success all right before we move on i just want to reassure some of you folks what this channel is capable of so a few years ago before we started this channel i built a mazda miata an unusual miata to say the least if you ever seen a miata engine you would instantly recognize that this isn't one of them it's a completely custom-built engine that uses mazda ford and kia components this engine gave the miata a glorious amount of low-end torque and delivered 45 miles to the gallon in the daily drive now that's a true 45 miles to the gallon and not one of those numbers folks will quote you if you drive a car a certain way anyway the majority of the development that went into that engine was done on this and that's a completely custom-built engine tuning dyno and yes that was built in this very same garage so is this project in good hands i don't know you decide [Music] [Music] ah [Music] [Applause] [Music] [Music] yeah we got this all right well let's go ahead and take a look at some other parts we'll be using on the new efi system the speed duino has more features that actually work so we're going to start off with a 36-1 crank trigger for the ignition system now this may be overkill for a one-cylinder engine but it's the right thing to do this trigger wheel will mount to the crankshaft in place of our single point trigger system a high-resolution trigger wheel like this guarantees precise ignition timing because the ecu doesn't have to guess if the engine has slowed down between crank trigger events and that's actually really important when running boost for the ignition system we're going to go with a coil unplug system this coil is from ford product and it's not known for its longevity but they are common and you can get them at any store now being that only has two wires means that it's going to require igniter because this beduino cannot directly trigger this due to the power demands i guess there's all kinds of igniters available but once again i went with something somewhat common and this is an igniter or sometimes known as an ignition control module anyway this was made for an older general motors high energy ignition system so it should be able to handle the demands of our ford coil let's see balkan road yeah where do they come up with these names now for the ignition module i picked up a nice looking aluminum enclosure because while i like to make stuff look nice plus the modular really ought to be mounted to something to dissipate the heat the spidwino no4c doesn't have a suitable enclosure available unless you 3d print one so i went with an abs plastic enclosure because 3d printing enclosures always end up taking too much time however i'm not opposed to 3d printing a mounting base for the arduino mega so let's do that alexa 3d print an arduino mega mounting base no i work for amazon i kind of noticed my echo dot has picked up an attitude and let's just say we had a talk and it would be a shame if that power cord got disconnected wow i can really get used to this modern technology so here's what one looks like up close let's see if it fits not too bad so through the magic of editing i went ahead and assembled the speedwino and how long did it take good question well i queued up the latest episode of vice grip garage and i had the circuit board done before derek had the 71 buick rolling so if you have time to watch vice grip garage or putin's fab shop then you have time to build one of these so let's see how this fits in the enclosure not too bad i'll have to do some trimming but it looks like it'll work just fine so far we addressed most of the issues that we'll encounter when changing over to the speed duino ecu i think for now we will probably retain a few items that came with the original efi kit like the fuel pump the throttle position sensor and the engine temperature sensor well actually the fuel pump will stay for now but we'll probably end up ditching it in the near future personally i like the fuel pump but it has an integral fuel pressure regulator that's reference to the atmosphere and that may cause tuning issues with the supercharger i guess we should also do something about the fuel injector well the fuel injector that came with the efi kit flows at a ridiculous 300 cc's per minute but keep in mind the ecu can more or less keep the injector in line but i think we really ought to do something about that unfortunately the injector is also part of the throttle body so that makes changing the injector a big problem and the way it's set up it ain't gonna work with the supercharger you see the throttle body needs to be mounted before the supercharger and the injector needs to be mounted after the supercharger so in order to relocate the injector i picked up this injector bung from do it yourself efi now the idea is to leave the 300cc injector in place on the throttle body but not use it basically it's just going to fill a hole in the throttle body and then we'll mount a new injector near the intake port on the engine so this bung is made for an ev1 type injector and there's plenty options when it comes to ev1 injectors so that'll make things a lot easier the top of this gadget is threaded for a barb nipple and that will allow us to connect a high pressure fuel line directly to the injector of course with such a major change to the electrical system we're gonna have to rewire some of it you know the cheapo efi system was a disappointment but the one thing it had going for it was it came pre-wired and that goes a long way for some people now i reckon some of the harness can be salvaged but not all of it will be compatible with our new system so this isn't my first rodeo and i've found deutsch type connectors to be ideal for wiring efi systems now deutsch stuff is expensive but there appears to be a knockoff brand called jr ready that's available at a reasonable price the problem is the crimping tool runs a little less than 200 bucks and that's actually cheap when compared to a genuine deutsch crimping tool like this one like i mentioned earlier the no2c board was easy to assemble but i do have an electronics background so keep that in mind the capacitor c7 and c4 are these two gumdrop looking thingies now they're polarized which means they're installed a certain way and both the board and the capacitors are marked there's plenty of resistor networks on this board and they all have a line printed on them and that line will match up with the square on the printed circuit board of course all the diodes and ics go in a certain way and that's about it it's easy peasy oh and one more thing i constantly get interrupted and that's not really good when you're putting electronics together so everybody has a system and if you don't here's one you might want to try now this bag had quite a few capacitors in it and as i installed each capacitor i put a little tick mark on the bag now i know it seems simple but trust me it helps so i could probably go on for hours but i reckon i need to actually put all this stuff together and get our street legal go-kart back on the road again so i guess it's time we wrap this up and i'll see you next time [Music] you

Channel: Robot Cantina

Views: 67,399

Keywords: $99, 212 cc, 420 cc, 420 hemi, alternative transportation, custom, cvt transmission, diy, documentary, efi, electric car, electric vehicle, engine mods, engine swap, fabricate, fuel economy, fun, funny, go cart, go kart, gocart, gokart, golf cart, goonzquad, great idea, gx390, hack, hand made, harbor freight, hemi, hho, high performance, home made, homemade, hp, hybrid, lada, lawn mower, lawnmower, modification, modify, motor, motor swap, motorcycle, mpg, predator powered car, Fuel injection, fart

Id: ICMYxJxGr0E

Length: 13min 18sec (798 seconds)

Published: Thu Jun 17 2021