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

Season 4 Episode 9. Jimbo makes the necessary changes to the AMR500 supercharger instillation on the 719 cc Kubota diesel Honda. Will these changes help the car accelerate? Tune in and find out.
Hi Ya folks! Beware of a GIVEAWAY SCAM. This channel is NOT doing a Giveaway and we are NOT asking for personal information. If you get a message asking for info, please ignore it.
Jimbo
Robot Cantina
207 S. Sedgwick Ave
P.O. Box 28
Haven KS, 67543

[@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?

[@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.

[@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

[@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

[@TheBeerBox80]

Whoever gave you that extra engine saved you a ton of work.

[@robotcantina8957]

Yes, Jason from Texas is my Hero!

[@andydufresne3635]

​@@robotcantina8957I'm a Jason in Texas. Just not that Jason in Texas 😂😂

[@robotcantina8957]

@@andydufresne3635 LOL... There are more than one Jason's in Texas?

[@flanhed]

I'm a Jason, not from Texas, and I approve this message.

[@robotcantina8957]

@@flanhed It sounds like all the Jasons from Texas are awesome!

[@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!

[@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

[@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. 👍

[@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!

[@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

[@smn368]

Morning nerds😂 welcome to the church of Jimbo. May we all aspire to be as great as he. Let us take 20 minutes of silence

[@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.

[@jasondreams202]

Favorite car channel by far. ANYONE can dump half a years pay into cookie cutter builds, but this is the type of ingenuity and creativity that actually is interesting to watch. If you could just get this to normal car level of speed it would be fascinating, and if it can maintain substantial fuel economy it might just become a popular build that others would try and emulate.

[@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.

[@thatcheapguy525]

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

[@CodyShell]

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

[@jimastra8488]

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

[@robotcantina8957]

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

[@josephpadula2283]

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

[@segrez]

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

[@NeonDreams7]

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

[@antonhuman8446]

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

[@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

[@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.

[@julianwinn4502]

Very interesting. I supercharged a friends 602cc Citroen 2CV6 with an AMR300 sucking through an SU carb. I saw similar improvements in acceleration. Had to play around with pulley ratios and ignition timing to avoid "pinking" but got there in the end.

[@henrik6727]

That is also a very interesting project.

[@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

[@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.

[@a-k-jun-1]

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

[@1quickdub]

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

[@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

[@richardschaefer3889]

Asmr..hilarious. Jimbo killing it on the Tube, every week. Thanks for letting us all pop our heads in the shop, and see what you're doing.

[@kaidwyer]

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

[@endangeredmarmot4518]

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

[@mightyfinejonboy]

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

[@histriamagna1014]

Hello from Slovenia Jimbo ! ❤🇸🇮

[@robotcantina8957]

Hello!

[@raleighparker7046]

It’s looking like when you DO bite the bullet and remake the crank pulley to get that proper SC drive ratio, looks like you’ll be right at the target boost numbers, exh temp should be more where you’d want to see it, and the little bugger is gonna have a cool little blast from the pipes upon acceleration. Can’t wait to see what’s next 👍🏻.

[@andrewwhite986]

Let's hope the extra torsional load on the spaced out supercharger pulley does not cause premature bearing issues.

[@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!

[@guillaumecouture7449]

you should do inbetween pulley ration, you went from 1.4:1 to 1:1, I think you should try 1.2:1 that would make aprox 8-12 psi of boost ! I love your video, keep up your great work !

[@Spudz76]

Remember, the 1.4:1 was erroneous because the mockup engine has a different crank pulley size than the installed engine.

[@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!

[@nelsondavis4310]

I like your Grassroots Motorsports sticker on your welder, it is a great magazine.

[@robotcantina8957]

Yes, I used to post there all the time.

[@leifhietala8074]

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

[@TSRGarage]

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

[@PetesCreativeRecycling]

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

[@granitecolorado]

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

[@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 ✌

[@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.

[@ryandavis4863]

GOOD MORNING JIMBO>>>!

[@geoffburrill9850]

Back with answers to questions you never ask. Love the language.

[@markmonroe7330]

Excellent presentation. Thank you. Really enjoying the updates.

[@Jayf1981]

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

[@dereinfallslose9665]

I just love to see your channel grow more and more. Keep up the great work Jimbo. Watching your videos became a sunday ritual

[@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.

[@willitbutter234]

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

[@SonicBoone56]

I was NOT expecting that huge of an improvement from that amount of boost. Definitely looking forward to future videos even more now.

[@douglasmayherjr.5733]

Pretty impressive for the first Supercharger testing. Looking forward to seeing the future developments. Thanks for the videos.

[@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.

[@hackofalltrades5256]

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

[@ddutton0]

This has to be one of the most underrated channels on KZbin!

[@54mgtf22]

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

[@livinlikelarry8782]

Bravo on your machining skills you made this all exceptional

[@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.

[@armedinbama]

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

[@rsquared9703]

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

[@SirOsisofLiver]

Man, I love this channel. Great work Jimbo!

[@rodneyross5282]

You are getting it done for sure. It will be interesting to see 8lbs of boost and the times then. Time for another cup of coffee. Normally will not last this long but this is just so interesting to watch. Have a blessed week.

[@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!

[@rubinthomas8586]

Brother, your level of positivity is inspiring 👍🏼

[@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!!

[@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 …..

[@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

[@fahb68]

As always the Best video on a sunday mornings, thanks

[@seekerofthetruths]

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

[@steelwheels327]

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

[@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!

[@MikeZ32TT]

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

[@dillpickle7468]

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

[@robertadams2161]

Extremely cool!! Can't wait for more!

[@137loller]

One of my favorite channels, Thank you!

[@ladatransport344]

Hello Jimbo, something I noticed in the video, you are helping the environment, less black smoke and more speed.😊😊😊

[@ericlondono4251]

Thanks for the video this week Jimbo. Great as always.

[@andrewweltlich9065]

This is still the most interesting series on KZbin.

[@thesylvanshadow4223]

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

[@mike_oe]

Nice work with great results. Already looking forward to the performance review episode!

[@xxbambamxx7261]

A good mechanic make use of what ever is at hand, and make it work ✌️ Looks awesome 👌

[@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

[@hackitgarage6503]

Your problem solving skills are impressive

[@user-ru3rq4jv3f]

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!

[@MarkSparks-xd9yy]

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

[@kansasadventure1831]

That was awesome! Im stoked to see how more boost does, and more data!

[@jhuntosgarage]

Nicely done, Jimbo, as always.

[@replikvltyoutube3727]

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

[@spacepope-1]

You are an inspiration! I need a decent sized shop to get to work on my projects... And time. Need the time

[@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.

[@yodasbff3395]

Another great video, Jimbo, thanks for sharing your videos.

[@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!