S4 E9. We fix and road test the AMR500 supercharged Kubota diesel powered Honda

[@jeremypilot1015]

This is the fun stuff. Everyone on KZbin wants to build an LS motor. Anyone can obviously do that. These are the real mechanics. How small an engine can we stuff in this tiny car and then send it as fast as we can down the road, whilst attempting to get 78mpg and all with normal tools that normal people own! How are they not at a million subscribers yet?

[@greenbassboosts8872]

Eh he's used some tools that I definitely don't have, and I have more than the typical person

[@miguelgameiro8063]

Because it’s niche everyone likes big power people don’t care for engineering feats like this

[@AutoCrete]

It's all a conspiracy started by tire shops!

[@miguelgameiro8063]

@@dustysanchez-hm6bn quick version is : Mid mounting it

[@greenbassboosts8872]

@@miguelgameiro8063 If people would fund it I'd put a few 49cc pocket bike engines in a car

[@jahlekos]

As a European, I really appreciate the conversion for the rain measurement unit Jimbo!

[@sienile]

Unit? All I saw was "water falling from sky". :P

[@dnktng4722]

These videos have more humor than HP. Perfect!!

[@rjung_ch]

10:34 such references as well.

[@robotcantina8957]

LOL..I didn't know the exact metric conversion for that one...

[@AlienLivesMatter]

Close enough ha ​@@robotcantina8957

[@FarmAlarm]

"What are we fixing today boss?" "The bumps on that *bridge* are starting to *smooth out,* so close it down for two weeks and make it like a ramp for a bicycle!" -D.O.T. workers 😂

[@AutoCrete]

I've unfortunately had to cross train tracks that were rough until they got repaired. Once they fixed it the same rail crossing it gave your shock absorbers a serious workout. Makes you wonder if that rail crossing was sponsored by a shock absorber company.

[@madduckuk]

@@AutoCreteYeah, Big Shock is a pretty cool name though.

[@antoniovillanueva308]

In Wyoming, there is a narrow road that is closed, the only signs are about 1/4 mile from the end of the road. The last exit is about 8 miles from the sign announcing the end. Are they just having fun? Or maybe they worship Satan at WYDOT?

[@photogravity]

⁠@@antoniovillanueva308Do they “worship Satan” ? 😂

[@badscrew4023]

@@photogravityWhy, who doesn't worship Satan?

[@puddin_orc]

That 5psi put in a lot of work, more than I would have guessed! I'm really enjoying this K-swap series

[@ProDigit80]

Unlike the turbo, which made boost at higher rpms, the supercharger made boost even at lower rpms, which didn't raise the hp much from the turbo, but did raise the torque. So most of the gains are in the lower rpms.

[@kensmith5694]

5 pounds of boost is 1/rd more air roughly but I suspect a lot of the improvement was from getting a fast and more complete burn of the fuel when it was shot in.

[@davidjernigan8161]

The county fixed the bumps alright. Those are excellent bumps they installed

[@goosenotmaverick1156]

I also have a local bridge like that 😂 It's deck is more patch than original paving. Lol but at least twice a year they put in a valiant effort to make it better

[@minnesotatomcat]

Cutting 12 seconds off the 0-55 time with only 5 pounds of boost is incredible, I was not expecting that! Very curious to see how the projected 8psi does 👍 always the highlight of my Sunday mornings, this is as close to church and spiritual enlightenment as I get 🤣

[@TykeMison_]

5PSI is a 34% increase in cylinder pressure/air charge and while there are losses, generally converts to a ~25% power gain. For a small output engine strained by a road car, "only 5 pounds" is a lot of power gain. For comparison, a 300hp engine with 5PSI boost would be making 375. 5PSI is a lot.

[@MarkSparks-xd9yy]

Tesla has to use SpaceX thrusters to cut 1measly second off their roadster. They need Jimbo. They'd get there before they started.

[@mastercricket7626]

My thoughts exactly , and if he had say a flat foot shifting engaged it would really male that thing sing lol ... but I seen some crazy deisel builds b4 that start as basically dbl digits and end up in the quads with deisel , so I would love to see what the full capability of this engine was with a modded fuel rack some ring gap and some big boost lol 😅.. peace and love bro keep it rad stay safe and build on l8z famz

[@minnesotatomcat]

@@TykeMison_ it’s really not, diesels are made for high cylinder pressures. The only reason I said “only 5psi” is because jumbo said that he was shooting for around 8……and 5 is less than 8 ya know

[@kensmith5694]

@@TykeMison_You made the point I was about to but I will add a small detail. When the fuel is shot in at higher pressures, it burns faster and more completely. On an engine what wasn't really designed to be all that clean and efficient this could add more power to the output from the same amount of fuel. Remember his exhaust temperatures were lower. In the opinion of Mr. Carnot, that means the engine part is more efficient.

[@davidbenes580]

Your egt alarm at 1000°F is very conservative. Generally 1200 to 1250 is safe. Diesels like the extra air. Adding more air drops egt's and makes more power due to more complete combustion. They prefer to run lean rather than rich. This is all assuming your charge air temps are not too high, thus intercoolers. Also, diesels are typically the most fuel efficient at about 600°F egt's. For your fuel economy testing try to keep it around that range for max economy. Love what you've been doing with these little cars. It been very enjoyable to see you do these crazy little projects!

[@JoeBManco]

As a small motorcycle rider, I appreciate it when the local DOT takes a smooth road and lays patches over it. Maybe our workers consulted your bridge repair workers since I live less than 150 miles from you.

[@robotcantina8957]

I shouldn't complain too much... I recently moved here from Michigan and the roads here are wonderful... except that that bridge.

[@billharris6886]

It could be worse, when living in southwest Ohio, some of the railroad crossings I encountered were so bad, if you exceeded 5 mph, you would lose your suspension.

[@pontiacg445]

I wonder if you live in the same town I do, the one with the recent "pothole state of emergency." Those patches suck!

[@minnesotatomcat]

Good call preheating that pulley and washer before welding, a lot of people don’t realize how important that step can be…..and then wonder why their welds crack. 👍

[@Wren6858]

PLEASE KEEP THIS CAR Ive fallen in love with it. I will pay you money to keep this thing intact. It deserves to live

[@krusher74]

he has 2!

[@SonicBoone56]

I'd riot if he got rid of either Insight tbh.

[@replikvltyoutube3727]

just let him cook

[@slipperyjk]

Those 3D printed alignment tools are impressive. Very neat build

[@kensmith5694]

Yes, folks with 3D printers often get into the mind set of "I'll just print a thing for that". It is surprising how people get really good at it. BTW: I have the most over designed key-fob case for my car because the factory one broke. The down side is that people often overdesign

[@flb78]

You should enter this car into the 24 hours of lemons race. There's one in Oklahoma in May. You could sell driving time to help fund other projects.

[@therealboofighter]

If you never have to come in for fuel…….

[@JCGver]

@@therealboofighter "I guess we could top off the tank while we are switching drivers, it's not really needed though"

[@therealboofighter]

@@JCGver the only problem is that you won’t improve lap times when the fuel level goes low.

[@spicemasterii6775]

Le Mans => Lemons?? I love it 😂

[@christophercasale7961]

A fun idea, but It's too slow to be safe.

[@fillg]

It's more fun to drive a slow car at 90% than to drive a fast car at 30%. They may be going the same speed but it's definitely not the same driving experience

[@79huddy]

That's why I widen the stance of my MK4 2.slow VW Golf and installed Audi TT brakes it'll pull over 2.2g's on a skid pad and is an absolute blast to drive pinned in 3rd without lifting through some hairy curves I've hurt some feelings in the Golf while acting like I'm rowing the boat while driving with my knees 😂

[@SH1974]

I'm totally with You! Btw: My current dream fun-car is the 85hp Caterham. ;)

[@ElGatoTerco]

100% agree, I've had tons of cars including an e36 M3, e39 M5, c5 and c6 Corvette, '06 GTO, etc. But my all time favorite car was / is the Fiat 500 Abarth. Absolute blast to drive, especially with the 6spd auto. Miss my last Abarth, was totalled by a drunk girl new year's day 2023.

[@donakahorse]

that 0-55 time is about what the original vw beetle did. impressive. looking forward to next weeks episode

[@ProDigit80]

Depends what original beetle. The 1940s versions had a 1.2 liter or smaller, with 20hp, but the newer ones 1.4l had 25hp, probably 30-32hp new. The last model years got a 1600cc, with I believe 40hp. So that's double the power of this engine. The beetles will definitely go faster uphill at 45mph than this.

[@donakahorse]

@@ProDigit80 and the super beetle got 60hp out of the 1600cc. but I was talking about the original original, and only the 0-55 times, not a sweeping claim about equal performace. lol

[@jimastra8488]

As an arizonan, i really appreciate you clarifying what rain is. I had forgotten.

[@robotcantina8957]

lol...glad to help any way I can.

[@antonhuman8446]

I'm a mechanically minded man. For at least 5 decades +. And now. A mesmerised one. VERY well done!

[@SpencerHHO]

These diesels have very high compression ratios to get the most out of them without forced induction. They tend not to get much from boost above 10psi, well they do but they tend to burn holes through the piston crowns. In Australia and Africa, the Toyota 1HZ is a legendary old lumbering NA diesel used in some small trucks and the Toyota landcruiser. People have been turbocharging them forever and usually 10PSI as a rough rule of thumb seems good. Anything much above that seems to blow the engines up unless they've had stronger pistons put in, usually with a reduced compression ratio of about 20:1 or 22:1 down from the factory 24:1. These kubota diesels are very similar with a 24:1 or 25:1 comp and the same style of fuek injection. If at all possible, now you have 2 of them I'd love to see you try and jury rig a reduced compression ratio, maybe by putting in a thicker head gasket? If you want a very cheap but even sketchier mod. Make a basic water methonal injection system. If you want to go even further you can mix a bit of nitromethane into the water methanol mix lol.

[@bleach_drink_me]

He has a wmi system from a previous build...

[@phillipbrandenburg2105]

I’ve seen the D1105 take 16psi of non intercooled boost in a Kubota rtv that was heavily overloaded with a specialty body on it with tracks, the engine was never turbocharged from the factory but it was kit sold through an aftermarket Kubota catalogue last I saw they had well over 2000 hours on them, whatever pressure that supercharger can make it will take just fine

[@MiGujack3]

He can go even sketchier and remove material from the pistons to reduce compression lol

[@vro1899]

What happens when you give them propane?

[@denisohbrien]

Customer had a landcruiser with a 1hz and an old school greddy turbo kit on it, popped the turbo, I put a modern more efficient (and much larger lol) turbo on. came on boost sooner and harder kept the greddy wastegate and boost control setup, IIRC it was set about 12 psi. Things been around for forever and never skipped a beat. perhaps our cooler climate in scotland helps. I didn want to run the fuel up a bit more, it certainly felt like it would have benefited but the customer was already happy with the increase in usable power.

[@CodyShell]

There's just this mad scientist in rural Kansas creating the most interesting vehicles and electronics known to mankind 👨‍🔬

[@segrez]

"if it looks stupid, but it works, it ain't stupid". Nice job, waiting for the range test!

[@1quickdub]

The sound on the fly by.. who would have thought that little stuporcharged diesel would sound so good! Nice work RC

[@Tibbs_Farm]

It might not be fast, but it looks like a perfect commuter car. It gets you from A to B and saves you money that you can put into a fast car for fun

[@josephpadula2283]

Wide open throttle ? WOT! I don’t even have one to open….. Signed Honda Kubota

[@thatcheapguy525]

for an IT guy you are one hell of a mechanical engineer.

[@NeonDreams7]

You make my Sunday mornings! And this cup of coffee. Thanks a bunch!

[@kaidwyer]

Dude, I was sweating over custom brackets for my supercharger dreams and you’re over here hangin’ your unit like a drawbridge! Genius!

[@StevenIngram]

Can't wait til the next episode. From here, it seems like you're in a good position for tuning and road testing. Can't wait to see it break its time to 55 and its max speed. Also, I love this little car. I live in a city and only drive about 5 miles per day. The maximum speed limit I see is 40 MPH (and due to traffic, rarely exceed 35 actual). This little car would cart me around for an eternity on a gallon of diesel. :D

[@robotcantina8957]

The car would be perfect for city driving for sure.

[@Wes.Crump00]

You have to appreciate the amount of thought and engineering in these projects to make them work imho

[@robertlong9029]

I’m very happy to have found your channel! I love it! Don’t stop.

[@kennedy796]

That's a good thing that the engine got a linear power band! For real usability this is a fantastic trait

[@endangeredmarmot4518]

This little thing is a completely reasonable city car, now. Amazing how much a little bit of boost can do!

[@johncrawford6571]

The dial up internet sound a few shows back was a hoot!!!!!!

[@robotcantina8957]

LOL... I wasn't sure anyone got that one.

[@johncrawford6571]

Sly fellow you . . LOL!@@robotcantina8957

[@a-k-jun-1]

I caught those "6 million dollar man" sound effects there 😂

[@gregholloway2656]

Fun video, Jimbo. Before you increase the boost, how about adding the intercooler? Might provide more performance than 3 more lbs of boost. Keep up the great work!

[@mightyfinejonboy]

add a vv turbo off a vw after the supercharger with a manual pull cable to alter the vanes.

[@putinslittlehacker4793]

First I wanted to say your work is genuinely quite good. In retrospect it may have been an easy idea just to induce a boost leak. Start with a small hole and increase it untill you got the boost you wanted. Though this is a much better solution. Knocking off 12 seconds is crazy, I wonder how much a little more boost will increase it.

[@mastercricket7626]

Dude , that is a rad differance In acceleration considering the engine, displacement , and over all packaging .. man that's sweet and I can't weight to see what more boost does .. and you are teaching me deisel rbh I'm a full petrol head and have only ever touched a 89 vw jetta deisel on any deisel engine and I think it's way different but idk ... but yeah man I have a speeduino running my whole car and it's a forged bored over miata with big turbo on 30-35psi and the big turbo is leggy so I got the speedyino ran to a monetary switch on my shifter to engage launch control and or flat foot shifting , and it makes a insane differance on flat foot when driving and keeping boost into next gear , I brake traction but I feel it would be perfect for this build .. and I know u are definitely more than smart enuf there Jimbo my friend ... anyways I lo e the content as I love tinkering myself so I bid u adue until next vid /weekend . Much love and respect to you and yours jimbo . Stay safe and have fun brotha ✌

[@johnsmithfakename8422]

I was expecting this setup to have more low end power, but 12 seconds off of the 0-55 AND the supercharger was under preforming. Color me impressed. This is why I am interested in Supercharged Diesels. The high RPM performance may be questionable, but low RPM performance is impressive.

[@AnalogDude_]

maybe the wrong pulley and blow off valve setup

[@leifhietala8074]

The Sunday morning RC vid drop is just about my favorite part of Sunday.

[@hackofalltrades5256]

Stupidcharger gave a outstanding result 12sec faster in acceleration @5 psi 👍👍 a liitle more fuel consumption is minor 😊great work 👏

[@IgniteLight]

Fantastic! I keep forgetting this no longer has a CTV. "Why is he starting off in 1st gear? Oh. Yeah." Keep it up Jimbo!

[@robotcantina8957]

Yeah, on this build we have a real clutch and a 5 speed.

[@Spudz76]

Constantly Transmissioning Variable?

[@IgniteLight]

@@Spudz76 haha. Good catch. I'll start calling it that!

[@kender1412]

If I'm married to a certain boost pressure, a pulley makes sense. I rarely am and sometimes want to have different settings for different situations. For instance, I ran 17 psi on the street (which arguably made it too fast for the street and made torque steer a mother lover, but didn't blow stuff up on pump gas) and 30 psi when running race fuel on the track with my weekend racer. A diverter valve is almost as cheap and gives me options in the future without having to source and buy different pulleys in the future.

[@TSRGarage]

Answering questions we never asked. Thats what I am here for. Nice work.

[@PetesCreativeRecycling]

5psi is impressive. 8-10 should be mindblowing!

[@ArmedAndIndigenous]

I was fortunate to catch the beginning stages on this project when you started. Now it's got boost. Awesome videos and top grade quality.

[@granitecolorado]

Your channel inspired me and I put nitrous on my lawnmower for the patches with very tall weeds.

[@ilovehappyemos]

Running a longer belt and using the tensioner to hold it onto the pulley will give you better belt wrap and make belt slip way less likely. May not be an issue, since the blower isn’t very big. Just something to consider. Good content!

[@billharris6886]

Wow Jimbo, your proficiency for improvising car lawn mower power plants has come a long way since that 218cc Predator build! Your refinement level has risen exponentially. Now you are on-par with a Citroën 2CV, with exception to the broom handle shifter.

[@robotcantina8957]

Some day I want to drive a 2CV ...just for the shifter experience.

[@Bigshooterist]

AWESOME! Love the boost 🔥 videos. The performance gain this time was great. Now, I have to imagine that more boost = even more performance? I'll be watching again next week. Thanks again!

[@rsquared9703]

This man correctly using the word fixture the entire video. Respect…

[@r0ckworthy]

My 1991 Honda Civic 4-door, manual transmission car got 47 mpg on the highway as long as I kept it at or below 55 mph, with the tires inflated to sidewall-max PSI. And that was all-stock, no modifications. And I took very careful, manual MPG records.

[@Jayf1981]

Wow, from the proper perspective, that's an impressive performance; Jimbo, congratulations!

[@seekerofthetruths]

Keep the supercharger boost level where it's at. Now add the turbo back for compound boost top end.

[@MikeZ32TT]

CD rom center punch. I love it. Another reason I watch. No need to spend money if you dont have to. Nice work.

[@B0RN2RACE100]

There was testing in the early 90s about supercharging diesel for improved efficiency and reduce soot. Theoretically, under boost, diesel engines are more efficient but turbos are always behind the fueling. Maybe with low boost there might be an MPG improvement, but at higher boost levels the parasitic lost of the amr500 might overcome the benefits. It’ll be fine to see where the balance of power and efficiency flips with different boost levels.

[@willitbutter234]

Always the best content on KZbin. Keep up the great work!

[@josephpadula2283]

Next project ? You use the jacket water heat and the exhaust to make steam and use it to run a modified old impact gun to give it Water Gas Nitro effect ! WGN. Can also be done using an engine air starter used on diesels …..

[@armedinbama]

"Cheap is small and not too steep. Best of all, cheap is cheap!" - Ray Davies 🤘😁🤘

[@mtttony]

Love the show been tuning in every Sunday, If you don't mind for me its like a grown up version of the wonder years from all those years ago!! Thanks!!

[@IJ-E36]

That's probably the single best performance increase out of anything you've done to date Jimbo, brilliant result! (and why I went blower on the Panda)

[@PhilTgaming11]

Thanks jimbo! You have given my dad and i some ideas for putting a turbo on my bike from how you do all of these. Been with the channel since the efi kit install on the insight. Keep up the work!

[@histriamagna1014]

Hello from Slovenia Jimbo ! ❤🇸🇮

[@robotcantina8957]

Hello!

[@rus0004]

I was expecting a lot more noise from the blower, as evidenced by the handful of videos of supercharged diesel pick-ups sounding like air raid sirens as they putt about the suburbs. That might drive me crazy after less than a day. Now looking at this, instead of using my spare M90, I might have to pick myself up an AMR500. Great job Jimbo. 👍

[@BurnerJones]

I'm not sure I could resist the urge to crank up the boost. Extremely cool project.

[@UpAndRunning-xz6er]

Great stuff! FYI. Kubota makes a front crank pully with 3 bolt holes that allows you to easily 'stack' multiple pulleys. 4pK and 6pk pulleys are also available.

[@GordonWillis-z8t]

Very interesting results. It was really surprising to see the improvement in performance. But I still haven't seen any baling wire and/or sealing wax. Keep up your cheap magic tricks!

[@CharredSteak]

Gotta be honest, wasnt expecting this to work as well as it did, props to y'all. Would imagine the supercharger gets rid of all the boost threshold issues this build had

[@sienile]

13 seconds is what the last Chevy Cavaliers did 0-60 in (PCM locked, could not make it go faster without tuning), so that's pretty dang good.

[@mexicanhalloween]

I never would have thought you could source hardened steel rods from cd-rom drives, good to know!

[@Wil_Liam1]

Almost 13 seconds quicker to 55 is amazing. Now imagine testing with the original boost numbers and seeing how much better she accelerates,and if there's any top speed gains...

[@ekner]

That's awesome! I'm so happy it works. Like I said before, turbo lag on small engines seems so bad, the supercharger might make more sense. And apparently it does! Crank that boost up :D

[@54mgtf22]

Jimbo is that guy everyone needs as the friend who helps you with that left field stuff. 👍

[@turdferguson5300]

I hear Toyota is looking for a smaller engine for their fake line of trucks. When you get this thing perfected they maybe interested. They'll find a way to make it use more fuel but that's just Toyota. Can't wait for the next video. With so much going on in the world it's nice to see a story where no one is mad or hurt. Thank you

[@MarkSparks-xd9yy]

my dad used to chew backer but he never got fancy & used any plate like you Kansas fellows

[@dillpickle7468]

This was exciting! Well done R C. Imagine how fast it would be with 10psi!

[@ryandavis4863]

GOOD MORNING JIMBO>>>!

[@figureofstick]

I'm super excited to see all the juicy data with the new supercharger, I also can't wait to see it with an intercooler and that special fuel rack doohickey you were talking about. So pumped

[@jram7047]

I like the stuff you do, I think it's time to find the right car and create a budget build that can do hwy speeds , has ac and basic car functions work. Something worth keeping on the road.

[@jwoody8815]

Yes!, your videos are the most exciting ones so far. Elegant Improvisation is the key to many very cool car projects and the original idea behind hotrodding.

[@rubinthomas8586]

Brother, your level of positivity is inspiring 👍🏼

[@replikvltyoutube3727]

Excellent work Jimbo, pre-liked this episode as I knew it will be good!

[@steelwheels327]

Can't say enough ...this is the best channel

[@justinsavs]

This is pretty awesome. I’d say that alarm likely wouldn’t have tripped if you were running that boost through an intercooler. Seems to me that the car is pretty drivable around town.

[@thesylvanshadow4223]

Shop class with Jimbo at Robot Cantina is always a highlight of my week. Thanks Jimbo!

[@Lss1six962]

Keep up the good work! I always enjoy watching your videos on Sundays. You might want to put the intercooler/ aftercooler back on when you get the boost where you want it. But I'm sure thats your plan in the long run. A general guideline for a diesel is for a 1 degree increase intake air temperature will increase the exhaust temperature by 3 degrees.

[@laynehorbal2017]

I stumbled onto this by accident, I'm a big Saturn fan. I'd love to see more of how you mated this engine to that Saturn MP3 transmission. I'm going to look at more of your videos after I finish watching this video

[@iceman45ification1]

That was rather interesting. 🤔 I would've thought it would've produced more boost on the top end after making the pulley smaller. Either way, not too shabby. It definitely looked like it liked the stupidcharger more than the turbo. Can't wait to see what she'll muster up next week. Nice work, Jimbo!! 💪 🔥

[@benterry6463]

You really have considering putting one of these into my 51 jeepster always wanted a supercharged Willy's LoL

[@chaseychaseum5366]

For a split second, when you said this "ain't Dodge Charger Hellcat Red Eye Fast", I was wondering if Dodge has released yet another variant... Called the FAST! Oh, well.... Great video as usual!

[@fahb68]

As always the Best video on a sunday mornings, thanks

[@wadet73]

Bionic sound satisfaction achieved ❤ great results

[@BlenDeR619]

First time coming across your channel through this vid. Love the narration, presentation and content of your video, especially the Bionic Man effect😄. Liked & subscribed! Can’t wait to explore the earlier videos of this build, keep up the good content!

[@ggginforlab]

17:12 What a beast! I love that sound!!

[@darwinskeeper421]

I love you including that Six Million Dollar Man sound effect while you were bolting the stupidcharger pulleys together.

[@Infernostar18]

shes coming along well. i say if youre still getting over 30 mpg its a win no matter what you lose over N/A compared to boosted. If you throw just a tiny bit more boost at it, you should be in the ballpark of where you want to be with this.

[@dingdingdingdiiiiing]

If I heard that car, I would think it sounds terrible, until I'd be told it's a Kubota engine, with that in mind, it sounds beautiful!

[@andrewweltlich9065]

This is still the most interesting series on KZbin.

[@hyattbusbey3563]

I've got a lot of interest in the 4cyl version of this engine. Love how this project is coming along.

[@bobirving6052]

Nice! Make it last 👍 WOT everywhere and no speeding tickets 😄

[@robotcantina8957]

That's the plan!

[@DeadKoby]

Neat stuff as always. Hamster sized motors maxed out in cars is always interesting.

[@cedhome7945]

I probably wouldn't have gone to all the trouble and just tested the supercharger as is , but then this would not be a Jimbo production without all the attention to detail 👍