Testing the Turbo Go Kart Engine On the Dyno! (How Much HP?)

[@Countryboy81]

The world needs more kids like these guys. Good clean fun that grows your brain. Been tinkering all my life. It never gets old.

[@65ShelbyClone]

Don't give up on the blow-through yet. You're really close, just need to change a couple things. You need a real fuel pump and boost-referenced 1:1 regulator, which could be used with EFI later. Boost referencing the float bowl was good; boost enrichment can be improved/adjusted with a pitot tube. The carb's fuel control would also likely benefit from a good-sized plenum between it and the turbo. An intercooler would achieve that and improve power. Food for thought.

[@NSXTACY420]

Listen to this guy ^

[@carsonhammond6204]

Upvote this comment. They need to see it

[@eyeballengineering7007]

Listen to all these guys /\/\/\

[@eyeballengineering7007]

The plenum volume would keep the turbo pulsations down (one lung engine issue)

[@chri2halty954]

Why does no one try a draw through system? Literally use a CV carburetor

[@montanawildcat5198]

I'm proud of you guys. First of all, the way all of you work together: Fabulous. Where were you guys when I was in high school? All the kids I hung with were not trustworthy. Seeing this through was a good choice, and it paid off. I suggest you keep improving, simplifying and clean up the design and market it as a one or two piece system. You guys will need the money from marketing this to come up with other things later. While you're young, use that energy and plan for the future. The engine rocks!

[@1977tosh]

Looks like you guys still aren't using a pilot tube. Pilot tubes are important for carbureted turbos, they add a little extra pressure to the float bowls. The extra pressure helps with enriching the fuel mixture.

[@laverncarroll]

Seeing the go cart community come together and working together is very very cool

[@zior8001]

This is what it's all about. In spite of the negative people that would consider it a waste of time. Why not do it this project with those who are just as eager and willing to find out the pros and cons of by actually getting your hands to the test.

[@22steblo]

Was awesome to see you guys work together and get good results, please do an EFI install on this as I'm yet to see it done and know you guys are the right people to learn with, I'd love to see the numbers after an efi as a comparison as well, and think you'd have one hell of a engine out of it

[@bryduhbikeguy]

Awesome guys.Congratulations for proving it's worth to the doubters.I hope the your New Year brings even more success in all you do !Happy New Year to all the fans too.

[@race-all]

Good job on the dyno build.

[@MicahShoemaker]

I’ve got some decent experience with this sort of tuning and building, for a twin cylinder motor you need a minimum pre turbo and post turbo volume of 3 times the displacement of a single cylinder to radically reduce turbo surge or compressor surge, with a single cylinder that volume needs to be about 5 times the cylinder displacement on hot and cold sides of turbo. I’ll post some vids eventually of my turbo Vespa 300 EFI project. Try it, you will need fuel injection or proper blow through setup and tuning but I promise this added volume TRULY helps a LOT.

[@DavidHoskins]

Good job guys! Adding almost 50% more torque is HUGE! Once you get the air-fuel ratio sorted and assuming you removed the governor my back of the envelope calculation says you should be around 15hp. That is better than I imagined this would do so you've taught me something already. I wonder if you'd get more or less power if you were to use a belt to drive the turbo? Regardless great job!

[@black98rt]

I mainly just clicked here so I could laugh at your “dyno”. But after watching the video I’m really impressed with it. I didn’t even crack a smile.

[@quadsman11]

Great work gentlemen ! Great to see a few future gearheads in the making here ! Love seeing you guys actually working on something other than X-Box, etc. ! It's not about the practicality of it, it's proving the end result ! Great job gentlemen !

[@roberthickoxjr]

I would love to see EFI or whatever it takes to get this right. Huge interest. Thank you guys for all the hard work.

[@bighomieJ5X]

Hey bbr thanks for the great vid, dont worry about the negative comments on this, you need good R&D with any build . Now you guys can go back to the drawing board and test out other stuff. Keep up the good vids.

[@alexmarti9011]

Awsome hell yea i dont know if u guys have a efi kit in mind yet but ecotrons is a great setup and i would recommend it bc it is a self learning system.

[@user-neo71665]

I've worked on 2 ecotrons kits and they were both complete garbage.

[@alexmarti9011]

@@user-neo71665 what motor were they on and do u know how to tune

[@stevenmurphree]

I have an ecotrons. I second that it is garbage. Blow through is more likely to work as the ecotrons fuel system is wholly inadequate. I'm comfortable tuning carbs and efi. Avoid ecotrons.

[@ionstorm66]

@@stevenmurphree I had a ecotrons, and swaped the ecu out for a microsquirt. WAY better ecu.

[@jok3yjesu339]

I dont think I have watched a video on this engine but I recommend getting a billet rod because that stock predator rod is weak and adding boost Is not the best and buliding your engine with a just valve springs and a cam would give you 10hp I'm pretty sure so get that air fuel firgued out and that engine will make way more power and honestly if you could find a smaller turbo you could probably get more boost tbh because honestly even tho that turbo is pretty small the exhaust housing mainly needs to be smaller so you can spool it faster

[@rotax636nut5]

Great, keep it up lads, so good to see you young people getting into engines in this way, I was the same when I was young, ended up building the engines for a lot of winning race cars..

[@draconidy]

time to get ecotrons efi kit, comes with self tuning ecu as well and can be tuned further.

[@Mx2J]

need to really get that afr down to like 11 or 11.5 lol yikes... gonna blow that poor motor up

[@mrblue2715]

Lol yep watching airfuel go to 15.xx made me uncomfortable

[@carsonzimmerman]

Im not doubting your understanding of air dynamics but i reccomend for an air cooled engine especially is to find a way to cool the boost (air flow from turbo into intake) which the colder the better with boost plus you know what would happen if you ran a air cooled motor behind you while being boosted for more than 20 minutes

[@marksaxon6577]

Great start, keep moving forward

[@mof4104]

Love the effort...single cylinder turbo is awesome

[@TheGarnerjustin73]

If you guys can get those AFR's dialed in throughout the rev-range, you should be easily pushing 20 horse with a 212cc. But your going to need an ecu, fuel injection and possibly a wideband O2 depending on whether your going to run an open or closed circuit fuel loop.

[@gazvlogs7459]

I'd have a smile on my face the whole time watching that thing swoooosh too

[@frankfitzpatrick5300]

Very nice dyno Grant

[@simplybeanjelly]

Yass I'm excited to see you guys really build this engine, it is gonna freaking rip!

[@christiancopher8356]

What an awesome dyno set up

[@ItsCreated]

What fuel is being used? I’m surprised it didn’t burn up running high 14-15 afrs. You’ll blow the welds off the intake manifold

[@27Zangle]

Perhaps the information was missed since my kids are running around like crazy - was there a stock test since the rated horsepower could be higher than advertised?

[@InsideOfMyOwnMind]

The coolest part was the mini dyno itself. I wonder if any small engine repairers can say they dyno your engine before they hand it back to you.

[@frankfitzpatrick5300]

Grant : Question ! How do you like the TCT Mech. Injection on a PERFORMANCE application ? I was told to stick with a Mikuni. or Tillotson 304. or BORED stock carb. Was told TCT is ok on a stock engine . I'm running 22Mikuni with stock high flowing BSP. JT head. & Isky Black Mamba cam. Any thoughts on that ? Thanks again Grant !

[@RickardsGarage]

Cool!! Where did you get the waterbrake?

[@dustinmiller7278]

Are y'all going to eventually put a EFI system on it would probably make at least 10+hp

[@boostedraptor]

Not trying to be rude, just want to help this work. A plenum, Airbox, whatever you want to call it, helps imensley with single cylinders, particularly a cone to cylinder to come shaped plenum right before the carb. The people saying this can't spool the turbo are wrong. The compressor side of the turbo is a bit small for this motor, but the exhaust housing is definitely to small. I have found a hybrid turbo with an exhaust side rated for double your wanted horsepower with a compressor rated for your wanted horsepower works best. It actually spools quicker without all the back pressure from the small exhaust housing, believe it or not. Do you guys run a fuel pump, regulator, pilot tubes, or any of those items? You could get it running great without efi.

[@mGMe-ti6km]

I noticed that the intake temp. got very high (250) causing the air to be less dense. The whole point of the forced air pressure is to make the air denser when entering the head to be compressed. I didn't notice an intercooler to cool the intake air from the turbo. Did the turbo engine ever get one? Good job though on the tests.

[@wheeln24-79]

I wonder what horsepower a built motor would make compared to how much that turbo cost. That would be a neat comparison! Maybe build another motor for that or test the motor on the c10 bike. Like if you agree. Cool project though guys! It's cool seeing you guys do stuff like this! That dyno is awesome!

[@BuzzLOLOL]

Built 212's make 15 - 20 HP...

[@mtnsleder2829]

Built + Supercharger = 40 hp on a 212

[@OFFPlaNetGaMeGeAr]

Is it ok for these small engines to reach that high of temp? Legitimate question.

[@andrewt9204]

I get this turbo project is more for fun than anything and to see what you can come up with (which is fun), but it would be so much easier to spend the $700 for the V twin and make a super offroader! Plus you get the sweet sound of a V twin. I know that's a lot of money, but it has like 20 hp stock, you wouldn't have to spend much, if any, money on upgrades.

[@doug12382]

So it's a waste of time when you can buy a tillotson 212 10HP for $180

[@BuildBreakRepeat]

Douglas Bigblock haha yeah...but it might be worth it on a fully built engine. We were just surprised that it made any power at all.

[@BuzzLOLOL]

Yep, 6 1/2 HP+ at governed 3600 RPMs stock... so would expect this much ungoverned HP (7-8) stock at higher RPMs without the turbo !!! www.harborfreight.com/65-hp-212cc-ohv-horizontal-shaft-gas-engine-epa-69730.html 15 lbs. of boost should give about 13+ HP...

[@KartFab]

@@BuzzLOLOL IIRC it wasnt going over 5 pounds of boost, it was lean, and its basically bone stock with heavier springs in it. I have other naturally aspirated engines that have made more than that on the water brake, but they had significant head work, carb, exhaust port matching, balanced, high compression, nice cam etc. The only other person that I have seen that actually tested his engine on a "dyno" with a "turbo" was warped perception, and he lost hp. I suspect it was jetting and just not enough exhaust flow to spool the turbo.

[@evilbeetlekustomscreations4965]

I'm going to waste money on a turbo kit to make that kind of power when you guys are proving the point let's just take a predator and run it on a blend of nitromethane and hydrazine😂

[@user-neo71665]

On fleabay you can pick up an electric start duromax 440cc (18hp) right now for $96 shipped.

[@nathangresell1534]

Goodness that thing went past 300 degrees!!! Let it idle after the run! That’s pretty dangerous but congratulations on the power though!

[@TurboVisBits]

Can do ecu with speeduino.com/wiki/index.php/Speeduino

[@TheMailmanOfSteel]

You should run the carb through the turbo inlet, would be easier to tune that way. Then you can just run a hard pipe directly from the turbo outlet to the intake manifold.

[@chloehennessey6813]

Oh my! I remember tinkering in my uncles garage on my first go kart! It had like 2HP and I could go maybe 5 to 10 mph. I was like 6. When I turned 10 my uncle got me an engine from a wrecked Yamama 125. It was a 2 stroke but it was quick! Especially because I only weighed like 80 pounds 😂 Now that I’m 16 my kart has a rebuilt Rotax 670. I think I’ll put my new welder to use and find a decent motorcycle engine. Maybe a Honda CBR 1,000RR engine. Hayabusa kart?? Prolly be like $2k just for a Busa engine tho.

[@wizard-ew5ze]

You guys need to put on billet parts , from the bottom end up through to the flywheel , get a Woodruff key for the flywheel to advance the timing , get stronger valve springs so you can rev higher without it going pop . Then work on the turbo side of things , getting the fueling right (run it rich) , I'd also recommend doubling up on the head gaskets to lower the stock compression.

[@UnTamedMustang]

He has a Mod2 cam in it, so... yeahhh... Pretty sure they "Belletproofed" the internals as well.

[@dieseldemon8562]

They REALLY don’t want to advance timing at all. It’s pulling good, and so far there hasn’t been any dropped spark from the increased cylinder pressure. Advancing timing with a lean AFR will send the cylinder temps high and lead to knock and / or a burnt piston. Getting the fuel trim correct will be the next big hurtle. Right now, they are barely pushing the turbo. Get the AFR down to a steady 13.5 - 13.8:1 and go for a WOT pull to 6500. 👍

[@UnTamedMustang]

What are they running, a 5.4:1 gear ? They wont build boost with that anyways. I know . My twin turbo car wont with a 4.56gear but will with 2.73

[@johnconner3901]

So from what I've been reading is you need to seal off fuel bowl and pressurize it and you need 7psi of pressure higher than boost

[@JonLasaga]

You guys should get a stage 2 kit for the engine and remove the governor then you will be making some real power

[@lucerofam5]

Good job guys!!!

[@NeoIsrafil]

Hmm... i really wanna see it make big power. Ive seen 212s running 20hp NA. Is there any way we can start putting down the big numbers? :(

[@xFourTwenty117]

should be more in the range of 11:1 AFR not 15-16 yikes. That engine was prob detonating like mad. Surprised it didnt melt or chip a piston.

[@nicolalio4633]

To fix fueling, use a modified car fuel system, a fuel pressure regulator with a boost refference. Block off the bowl breather and ensure you have a fuel pressure gauge.

[@Yfz450rider2007]

It would boost way more easier without that restrictive exhaust... fab an open 2’’ shorty straight exhaust and you’ll be happy

[@mustafaYkhan]

I really like your intro

[@Nunya_Bidnez]

Dope as FFFFFFFFFF. Great build and vid BBR...

[@stefandwoodham]

Single cylinder engines need some tweaking to get the turbo to work on it

[@jeep2003]

Did he test a stock predator on that dyno or are those just factory numbers?

[@KartFab]

i tested a stock predator on my dyno and it makes 6.5 hp on it. harbor freight advertises it as a 6.5 hp engine as well.

[@jdmjedi777]

So if you could put a cvt on that motor that holds it right at the rpm for peak torque and boost that thing would move!!

[@eyeballengineering7007]

+ actual tune

[@mtnsleder2829]

jdmjedi777 stage 4 first

[@ECAConcepts]

This is what you call traumatic bonding.

[@RydogGaming2002]

This is pretty cool just for being different but a stage 1 kit will make the same amount if not more power than this, if you have a fully built stage 4 engine then you might be able to get it working, also I would try a draw through carb

[@JP3_Miller_CriPPs]

nice, thats where its at guys.

[@ians1464]

I didn't know Will Ferrell could tune small engines

[@jwacker6590]

I'm kind of confused by this. The motor always has run like crap with the turbo. Why put it on the dyno before it even runs correctly. Gonna have to go with fuel injection to get it right. It might make a little more power than stock, but it's completely unusable.

[@zezeNoPro]

Totally agree

[@finnhalewood2419]

J Wacker it’s just for fun

[@gavincline209]

it’s run like crap but still has more power then stock. Plus to get actual proof of gains every step of the way has to be tested and verified for comparison

[@eyeballengineering7007]

Because it's a learning experience.

[@mtnsleder2829]

J Wacker grants bored

[@azzacc]

Try a pull through set up with your carb. Carbs aren't designed to have air pushed through them; they're designed to pull air in. Put the carb before your turbo. And jet it bigger. Or get a bigger carb. And build your valvetrain.

[@richb.4374]

I applaud the effort but a turbo on these small engines seems to be a waste of time. Many have tried it on KZbin and I have yet to see one actually run good with a turbo on it. Perhaps a belt driven supercharger would work better?

[@Namesakes.unit-x-10sq10]

There are several groms making good power with turbos on KZbin, several pitbikes and one in particular has a 150cc pit bike that spools up at a low 4000rpm, and reaches 10psi at 6000, making the useful part of the powerband 5k rpms! (11k rpm limiter)

[@Splungers]

The testing is the early stages. I predict triple the horsepower when all tuned in.

[@kevinardron2601]

Can detonation cause a two stroke engine to seize up?

[@UnTamedMustang]

You may not see "Boost" but if you make the jet bigger you will get a boost in power until it leans out again.

[@stevie9361]

Don't a stock hemi 212 make around 8hp?

[@didyliduu]

Put the carb before turbo and tune it properly with lambda. Runs poor in low rpm but on boost, probably blows up :)

[@gokarting1018]

The question is is if u just put the headder and the mikuni on the predator how much power would it make

[@ctrlaltstartx7113]

Late to the party, but I bet you can get that bad boy registered as an Energy Star Certified lawn sprinkler.

[@thibo2107]

But why would you do that for only 8.5 hp when a dirt bike 125 cc makes 30 hp and has gears

[@zachbeaty4360]

I stuffed a vtwin 22 hp engine on my mini bike. Yall should turbo one of them

[@eyeballengineering7007]

60hp I bet

[@mtnsleder2829]

B Curtis twin charge it 100 hp!

[@zachbeaty4360]

Never dynoed it. Had plans to but a rod went full send

[@mtnsleder2829]

Zach Beaty never remove the governor unless you plan to build the internals

[@oliverscorsim]

much better guys but still don't see a pitot tube you need that to get those afrs down as boost comes on

[@jblev]

There's no replacement for displacement !

[@gregclayton8831]

Great content thanks!

[@drewalsup9200]

Now i would try moving the turbo setup over to a fully built motor and really seeing its potential and then bullet proof it and make the most powerful 212 gokart ever, and put it on something with atleast a solid axle not one wheel peel

[@talanpeterson6882]

do that with a 670cc predator. not 212

[@rncboy2]

Definitely change the main jet or move the needle up a clip also take jets with you if you guys go back and do ot again I'd keep trying tell you get it. Or then do efi. I'd still try and make the carb work!

[@300zxdriver]

Kylee Bates Moving clip on needle only affects mid range. When your wide open the needle is all the way out of the main jet. Main jet affects wide open throttle a/f ratio.

[@jamiefultz5937]

The dyno is pretty cool

[@inhumantreatment]

seriusly? dont kidding me dude.

[@mtnsleder2829]

Kartfab fab it him self

[@Epiphalactic]

So this compared to say, buying a wrecked r3 and putting the motor on, stock. The r3 itself gets about 41 BHP. On a lighter chassis, no gearbox, with more traction, I'd assume you'd get more out of it. And you still havenlots of room for performance upgrades.

[@zezeNoPro]

Guys, it's a good build but engine doesn't work properly. You should either try an efi or make it draw through instead of blow through. Check my videos if you like. On a much smaller engine, 100cc, the same turbo but draw through setup, runs so smooth and gives up to 5 psi.

[@edwardchance2543]

Cool video thanks

[@sixxgunz3774]

It loves that 5000 rpm range

[@RaisingLionsNotSheep]

My stock predator with a carb upgrade made more power then that lol. I would like to see that thing around 30hp

[@joseandony4416]

Where u guys get that little turbo???

[@finnhawkings2486]

It doesn't matter if it had a turbo or not. It has the gouviner pulled out and a good card and some other things. The turbo is doing nothing

[@DangerDavefpv]

Does it even have boost?

[@Dontgetenslaved]

Just get you a zx6 motor and turbo it. Then youll have power for days and speed upwards of 160+mph on a kart. Just make sure to put some ultra fat tires on it.

[@trentdawg2832]

Do you have videos on the build.....I wanna put a turbo on my son's gokart...it's gotta taotao110cc.....that's gonna be my next project but I have no clue on which way to go....

[@mtnsleder2829]

Trent Robey he dose but that engines real small for a turbo

[@jacob2996]

What happened to the 2 stroke kart, did you guys sell it?

[@BuildBreakRepeat]

Jacob Miles We did sell it, but we have a few videos of it and another kt100 kart we bought, we will release those after the rally kart.

[@jacob2996]

Build Break Repeat ok, well I’ll be looking forward to watching those when they come out

[@oscarzt1652]

if you make 8.2hp at 3900 rpm, why rev it out to 6000? because the connecting rods are suicidal?

[@mtnsleder2829]

Oscar Thorpe yes and it’s running lean and could blow up

[@user-neo71665]

The reason you don't see successful small engine (5-6.5hp) turbo engines is because there isn't a cost effective easily accessible turbo small enough for them. Unless something has came out in the past few months the smallest turbos are for japanese kei cars and those engines are 360cc and up. EFI will help some but it will never idle or run right at lower RPMs. The engine trying to spool the too large turbo up is robbing too much power down low. I wasted untold amount of time looking into this and even the popular VW/Porsche smog pump supercharging before I just gave up. The amount of time and money trying to get a 212 to make bigger gains isn't justified by the cost of just replacing with a larger more reliable engine.

[@jasondominguez8434]

That is pretty dope, But it’s probably better to just grab a bigger engine

[@stevebarnette]

Around the 5 minute mark, I was going to comment that the engine sounds way lean, but at 6:08 the dyno guy says the same thing. Do you guys have a plan to fix this.

[@stevebarnette]

After continuing to watch the video, I heard you say you will be going EFI. You have been doing an amazing job on this build. It’s also great to see you collaborate with another KZbin. Can’t wait for what’s next!

[@mtnsleder2829]

It only takes 10 mins to drill the jet bigger😂

[@adolfodiaz8110]

What you guys need is a 308 Dyno cam 32 lbs valve springs and put a arc Billit rod with weisco piston be in it be under 300 bucks and rejet the carb I can see this thing in the 16 to 18 hp we race predators on karts were I from we are pushing 15 na hp

[@ryancurrent2718]

Love your channel, just a question, what is your intro song called

[@matthewdesrochers5126]

I was just gonna ask the same question

[@damon3903]

Its jimmi by andrew applepie

[@mcpeake78]

Moto Migs needs your help with doing a turbo build.

[@alltheboost5363]

Who really cares about the horsepower number that torque number is really good and since you know the torque is there if you can get the RPM up while making the torque.... it'll make an equal or better horsepower. the lean AFR caused it not to make the horsepower. I'm really surprised you guys didn't melt a piston or valve with that Lean of an AFR or that hot of combustion.

[@eyeballengineering7007]

Exactly. You know it works with that much torque down low when they can get it to run at all. It would pull surprisingly good I think with a good afr

[@icantcomeupwithaname8925]

Im guessing the point was to just see if the turbo makes any power, rather than trying to actually get good power out of the motor?

[@WhisperWisdomHub]

Good job guys ..can any one build for dyno for 10 kw engine ,,need only measure torque and power

[@zippyoya]

Could I do this to a 150cc 9.5 hp engine?

[@zippyoya]

Lassi Kinnunen ah thank you