Quarter Scale V8 Engine SCREAMS After Timing is Fixed!

Рет қаралды 921,156

9 ай бұрын

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ENJOMOR GS-V8 Engine Specifications:
Displacement: 78cc
Four-stroke
Bore: 22.9mm
Stroke: 20.00mm
DOHC
Maximum RPM: 9000rpm
Maximum Power: 3.8kw
Water cooled
Independent Lubrication (Oil Pump)
Electric Starter (Brushless Motor)
Electronic Ignition with Distributor
Spark Plug Type: ME8 with 1/4-32 Thread
Ignition Voltage: 10-12V
Starting Power: 24-48V Battery (I used 4s battery 14.8V)
Fuel: 95# Gasoline
Oil: 20W and above, Oil Volume: 50ml
Dimensions: 13.6 x 17.9 x 13.8cm
Weight: 4500g
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Пікірлер: 672

@Duvstep910 9 ай бұрын

i love how this thing has basically the same workings and maintenance requirements as a full size engine

@RedLine_Renesis 9 ай бұрын

As it should

@MattBrownbill 9 ай бұрын

And even emulates a full sized Ford engine's reliability...

@tesmat1243 9 ай бұрын

Because it's an actual engine just smaller

@sharedknowledge6640 9 ай бұрын

If your unreliable full size engine was made in Germany.

@Modna89 9 ай бұрын

More so. You can tell these were designed to be started up once or twice, say "oh cooool!" and then forgotten. There is so much unreliability, i mean the fact that so many of these engines have horrible tuning/timing issues straight out of the box? And shearing off the bolts for the flywheel. It'll be cool to see Q90 get this up to snuff

@johnkilo3 9 ай бұрын

Imagine paying that much for that miniature V8 and the water pump dies, the timing is off, and the flywheel bolts sheer off right out of the box.

@steved479 9 ай бұрын

It's about half what a made in the USA Conley v8 used to cost when you could get them (A decade ago). Pretty good deal considering the work and all; but, it is a cheap Chinese knockoff, ya get what ya pay for. No biggie for someone with a 5 axis mill.

@crissyb00 9 ай бұрын

@@steved479 3k. no biggie? It's pretty lame for anyone that's bought one that doesn't have a 5 axis mill... indeed, why the hell should anyone have to fix it before it works? Shame Conleys are no longer available

@crackedemerald4930 9 ай бұрын

@@crissyb00cus it's cheap

@crissyb00 9 ай бұрын

@@crackedemerald4930 3k may be cheap to you, but it ain't for most

@gummel82 9 ай бұрын

It's chinese garbage. What do you expect

@yankeedoodle7693 9 ай бұрын

$2,800 dollar engine and the flywheel bolts shear off. Excellent review- again.

@andycrask3531 9 ай бұрын

Probably why it was limited to 5000 rpm from factory?

@deckname5794 9 ай бұрын

On the linked website it claims 9000 rpm max

@lastofthebest5102 9 ай бұрын

How is a video of cheap chinese garbage where the "reviewer" doesnt even speak an "excellent review"?

@andycrask3531 9 ай бұрын

@@deckname5794 like they 1,000,000mah power packs and 2,000,000 lumen torches?

@Zairn12345 9 ай бұрын

What’s the stroke? It should be about feet per minute max at what, 3500?

@aerykhurley8236 9 ай бұрын

It still sounds really out of whack.. And all these problems. While its awesome to watch you dial it in, it really confirms that id never buy one..

@yourbigfan1777 9 ай бұрын

However i'd build one myself

@ManiacRacing 9 ай бұрын

That is still a very unhappy engine. The popping through the intake leads me to suspect it still has timing and/or valve lash issues

@tim.garrison 9 ай бұрын

Agreed. I was thinking that it needed some sort of variable ignition timing, like old V8's have. Either that, or throw some sort of electronic ignition on it.

@jdoe9518 9 ай бұрын

It is actually reversion. Which is most likely valve float related

@macedindu829 9 ай бұрын

Man, I thought the exact same thing. It's better for sure, but IMO, it's still clearly off from what it should be. It's a shame it shipped in such a shoddy condition, because it's so fucking close to being truly amazing.

@ManiacRacing 9 ай бұрын

I don't see them that way. Even a cheap chinese product like this has all the basics. Once you get the materials and specific flaws worked out, most china stuff is decent enough, especially at a fraction of the price. Without china, stuff like this would be completely outside the realm of normal hobbyists.@@macedindu829

@kd7cwg 9 ай бұрын

I thought I heard some detonation.

@BirbieTheProto 9 ай бұрын

Sounds a lot better then before, 2,800$ sounds too much for the water pump and the flywheel bolt to fail like that.

@blahorgaslisk7763 9 ай бұрын

So buy a better alternative engine then. Can't find one? Well there's your problem! This is a vanity engine. It's not supposed to actually be used. The fact that it works at all is supposed to be enough. As a curiosity item that's what most buyers will be expecting. And the price? Well there's not much in the way of competition and the production volume is extremely small so there's a lot of manual work and few standard components used. This makes it expensive already at the BOM, add the limited competition and the price just goes up.

@cDog8766 9 ай бұрын

@@blahorgaslisk7763 For $3K, I'd expect even a "vanity" engine to not rip itself apart just running without a load. Buuut, if you like wasting your money, I guess you do you bud

@J-1410 9 ай бұрын

@@blahorgaslisk7763 You can buy an actual full size V8 from a junk yard for that price

@Eian_Anderson 9 ай бұрын

@@blahorgaslisk7763 you are sort of talking down to someone for having different market expectations from you. Some want more for their money, I imagine you do as well.

@wololo10 9 ай бұрын

2800 is for the bare minimum quality

@MilesPrower69420 9 ай бұрын

the fuel level dropped only after cutting the throttle, those pulse type carbs are meant to have a very distinct pulse from a single cylinder engine witch makes the diaphragm in the carb pump the fuel. a proper carburetor setup with a float would be substantial

@iancarney3082 9 ай бұрын

I was thinking the same thing. It sounded like it was getting some pre detonation at the higher rpm. The pulse pump carbs are a likely culprit combined with the increased timing.

@lastofthebest5102 9 ай бұрын

Until you can spell which* and construct a coherent sentence I am thinking your opinion is irrelevant.

@MilesPrower69420 9 ай бұрын

@@lastofthebest5102 ah nice pointing out my dyslexia, you must be fun at parties! uhm ACKTUALLY

@matt-bb2kv 9 ай бұрын

@@lastofthebest5102clown 🤡

@jasonmurdoch9936 9 ай бұрын

That looks almost exactly like the carburetor off my 2-stroke 25cc Echo weed eater

@schhomeimprovements2517 9 ай бұрын

I feel it has more to give ... keep tweaking

@dennisdempseyradiooutofcontrol 9 ай бұрын

Great work brother! Every adjustment is making it better and better👍👍

@ferrarikingdom 9 ай бұрын

Sounds so much better now . Awesome work as always

@evilroyslade2491 2 ай бұрын

Thanks for the time and energy in making this video.

@ElPitch90 9 ай бұрын

It still sounds like it could run even better if you could dial the phase even more precisely

@JoseSilveira-newhandleforYT 9 ай бұрын

Yep. Possibly fuel issues too.

@lastofthebest5102 9 ай бұрын

Or throw that pos in the trash and build a new engine from scratch.

@zzyzx0069 9 ай бұрын

For next video series, you should install electronic fuel injection and electronic control ignition. Then we can see the real performance of this engine

@dav1dsm1th 9 ай бұрын

It'll just break more quickly 🙂

@zadtheinhaler 9 ай бұрын

The MegaSquirt will be bigger than the engine haha

@ethancoy9237 9 ай бұрын

Idea is cool, but this engine is far too small, well tuned carbs of decent quality will provide as much performance and throttle response as fuel injection, main reason it's used in modern cars is fuel economy and emissions, as for ignition, the distributor is fine it just needs proper adjustment to get the correct timing, it also likely doesn't have spark advance so that's why it idled higher after adjustment but could rev higher over all.

@andrewwhite986 9 ай бұрын

It sounds like a bag of nails. English expression to say it sounds like it's f**ked 😂

@barthanes1 9 ай бұрын

I feel like this needs to be the powerplant for a scooter. A V8 scooter just sounds too cool.

@shaun7057 6 ай бұрын

Cool and scooter are two words that definitely don’t belong together! You know what they say about fat chicks and scooters don’t cha?

@gabrielmerza6904 9 ай бұрын

Good morning from Arizona , amazing work Johnny .

@zedlesshorseman 9 ай бұрын

It still doesn't sound right after your timing fix. I could be really wrong, but the timing might be able to be further dialed in on it. I really enjoy your videos! Thanks for sharing stuff like this!

@johnayers3583 9 ай бұрын

Waiting for the “1:1 Scale V8 Engine” video😂

@chrisarmstrong8198 9 ай бұрын

High inertia flywheel driven by 4 little screws located close to the rotation axis. They were bound to loosen and eventually break when the engine was repeatedly accelerated and decelerated rapidly.

@jimwhite1061 8 ай бұрын

Good point

@petemoss8245 9 ай бұрын

keep on it. Love to see working out the problems and issues as it goes.

@crabmansteve6844 9 ай бұрын

Protip: Disassemble any machinery or tooling you get the comes out of Southeast Asia or China. About 97% of the time you're going to find grinding dust or lapping compound in everything, ready to destroy the machine or tool you just bought. If you're buying tooling or machinery from USA, Europe or Japan you dont have to worry about this.

@kahlzun 9 ай бұрын

still a good idea to check everything you get. Helps you understand how it all works too

@lastofthebest5102 9 ай бұрын

Protip: dont buy asian garbage.

@villedocvalle 9 ай бұрын

One of my favorites on KZfaq.

@PressedSteel1919 9 ай бұрын

looks real cool & fun...... good job.

@slucas601 9 ай бұрын

Excellent work so far, but it seems like there might be a bit more joy waiting for you find in this thing.

@forbiddenera 9 ай бұрын

5:57 kinda sounds like detonation at full revs after fix.. hard to say for sure on an engine so small, the fundamental feels like 2 octaves too low but otherwise really feels/sounds like it!

@chrismaurer2075 9 ай бұрын

When I was a jobbie at GM Powertrain design there was a machinist that was into miniatures and he made an actual 350 1/4 scale that ran .This guy made a lot of miniature things like cars and airplanes so when it came time to think about retiring him and his wife went to Disney Land or which ever is the one in Florida , and applied for a job . When he got home he sent them a video of all the miniatures he had made and they hired him right away.

@Leroys_Stuff 9 ай бұрын

I would be very unhappy great work getting it going.

@ellisonlowrimore7751 7 ай бұрын

Awesome work!

@brutalseed6643 9 ай бұрын

There should be competitions with these engines on who can create the most power from one. Or maybe that will happen in the future, it would be so cool to watch.

@davecaresforyou7606 7 ай бұрын

Man you are amazing at building

@russellbautista619 9 ай бұрын

I would love to see that motor in a quarter scale RC wood speed boat.

@FunnyHaHa420 9 ай бұрын

I want to see it put in a Power Wheels car.

@nashratify 9 ай бұрын

Sounds much better. You have found some great secrets in this motor. The radiator set up is boss.Thirsty little thing! It sounds to me some valve over lap and or just a bit loose.

@user-zy3jw3oh9b 9 ай бұрын

Solid! Top KEK! Peace be with you.

@markboniface6579 6 ай бұрын

Hey there Johny Q I find watching your videos truly mesmerizing , any chance of a workshop walk around as I see new machines and tools on every videos and as cool as the end build is I find the reengineering side of it just as interesting cheers Mark from NZ

@user-kj1od5ed7p 6 күн бұрын

Thank you for your videos

@sargemarine3709 8 ай бұрын

Looking forward too what you put this in.

@hkr321hkr 9 ай бұрын

Amazing stuff thanks

@BradynThibeault-dv8qg 9 ай бұрын

So good to see the engine getting the love it deserves still got a way to go but its getting there

@markcanlast12rounds60 9 ай бұрын

carb jettings might need some adjustments but holyyy this is dope!

@masterSe7en77 9 ай бұрын

I really love your content

@billmadle1235 4 ай бұрын

This is totally fascinating😊

@wankedah84 9 ай бұрын

Dah boleh masuk kat moto dah ni..v8 padu bohh

@agaldoo 6 ай бұрын

That engine sounds very cool

@Djhg2000 9 ай бұрын

Would be awesome to have a collaboration with the Speeduino team, imagine this with a computer ignition timing map!

@alparslanalialp3341 9 ай бұрын

I wanna see this engine in a bigger scale car model... Awesome Work

@therandomman6647 9 ай бұрын

I still find it funny that it uses the same carburetors as a Poulan leaf blower

@walter9724 8 ай бұрын

They are garbage.

@jovanymorales1766 9 ай бұрын

Nice and perfect. Bless

@songkrantullachart4472 9 ай бұрын

Tuned perfectly. The sound of the machine is very smooth 🤤

@malancaluciano1253 9 ай бұрын

Can i hear some ping after advancing timing? Or is just the exhaust

@poohssmartbrother1146 9 ай бұрын

Needs vacuum advance like a real carb and classic V8 would have. Electric Ignition and Fuel injection would really give you lots of options, and more data to adjust things with.

@starpuss 9 ай бұрын

Seems Like they always have a LOT of Bugs to work out.... Do they not Expect people to run the engines or? what LOL!

@soylentgreen9492 6 ай бұрын

Please vicariously send me just a tiny amount of your patience and perseverance.

@shawmarcus1989 9 ай бұрын

Awesome job. Im wondering whats the lowest rom you can idle it... the lope would sound cool

@jerrybomcool 9 ай бұрын

Why was this re uploaded?

@TexasNEV 2 ай бұрын

Amazing how much it sounds like a full size V8.

@gianttrance5180 7 ай бұрын

Are the inlet valves closing at the right time still?. Looks like its spitting back into the carbs as you rev it.

@JoshiJosho-mf8oi 9 ай бұрын

You'd have the most badass weedeater in the neighborhood with that!

@jacquesb5248 9 ай бұрын

wonderful machine. how many hp does it produce

@tiporari 9 ай бұрын

Nice fix. I wonder now at 6500RPM if you're starting to get some valve float. The cam grind is probably a compromise to give acceptable idle and throttle response, but has too much lift for high RPM operation. Wonder if you add some cam phasers to give it some more advance at higher RPM. Might only tolerate a few degrees, but it would be an interesting engineering challenge. Same potential on the ignition timing. If the distributor or ignition control doesn't have timing advance that would be a worthwhile upgrade to improve starts and high RPM performance.

@TehCheezMan 9 ай бұрын

After the first couple of revs and hearing it break up at higher RPM that was my gut reaction.

@ethancoy9237 9 ай бұрын

Not quite how that works, lift won't be the issue, that'll only help with performance, spring strength, cam duration and overlap will be bigger factors, that and ignition not having spark advance.

@TehCheezMan 9 ай бұрын

@@ethancoy9237 right.... Spring strength, cam duration.... Which will directly improve/affect VALVE FLOAT hahahahahaha xD. Given the quality of the rest of this motor it wouldn't be the least bit surprising if the valve springs are not very strong in this case.

@ethancoy9237 9 ай бұрын

@@TehCheezMan Yeah no shit, it's Chinese made and barely runs out of the box, thing that was being said was ways to improve that, increasing valve spring strength and more duration, of which won't directly cause valve float, rpm will cause that as a result of the power band being changed and peak power being higher in the rpm range.

@ostelo84 9 ай бұрын

@@ethancoy9237what is valve float?

@JazzbLu 9 ай бұрын

Do you happen to have a timing light? I know very little about mini engines, but a full scale V-8 should be conservatively around 30° advance before top dead center at 3 to 5 thousand rpms. For performance (possibility for knock) 45° advance. It still doesn't sound as healthy as it should be, but great job so far tuning!

@muttbone01 Ай бұрын

What model is that CNC you're using for the Delrin milling?

@Rick_Dunaway 9 ай бұрын

It still seemed to be “loading up” if anyone asks me. Are you certain that you didn’t have a hole out? Anyway I think it’s a wonderful project and you have done great with it and these videos. Bravo!

@jamesgarrard4361 9 ай бұрын

Fantastic video project , well done ,i like the phenolic spacers on the carbs , try using less glycol for better water cooling !!

@varqtube 9 ай бұрын

Those headers are absolutely beautiful. 👍👍

@sannyassi73 9 ай бұрын

I want 4 of these to put in my vehicle- one for each wheel and the equivilant to a full V8!

@jimwhite1061 8 ай бұрын

Can't imagine who, and how, someone machined a crank, a cam shaft, and a block with tolerances to be accurate enough to not only enable that engine to run but to not vibrate right off the table. Can't imagine the skill it took to make the heads with valves making that engine run pretty darn good. Bravo!

@blfun3535 8 ай бұрын

I was thinking the same thing except I will add that he paid $2800 and it came with 2 weed eater carburator's and runs like shit. I've always wanted one untill now.

@MrJamesBanana 7 ай бұрын

Those engines actually don't have that close tolerances by the looks of it, and with modern CNC equipment keeping decent tolerances isnt that difficult. I work at a large engine plant, and we need to keep tolerances within thousands of a millimeter on some machined parts, and castings within a tenth of a millimeter before machining. For a model engine, I'm pretty sure sure most things have at least 10x those tolerances.

@kelevra558 9 ай бұрын

You should try to merge the exhaust. I had dual all the way back unmerged and I made an x pipe out of a 5 inch piece of vibrant exhaust tubing on my 2016 mustang gt. She made an extra 51 ft lbs and 19 hp at the wheels. It also sounds a thousand times better. Try it

@michaelvette7659 9 ай бұрын

It still has a timing issue. Problem being is its basically statically timed. You advancing it helped, but what it needs. Is either a vacumm or mechanical advance. Which advances the timing progressively, with RPMs. You may be able to run the spark, through a ignition module. Similat to an MSD unit, but with not that type of voltage output.

@ForrestGumpWR 9 ай бұрын

What great videos you have. Thanks Johnny!

@bobsrc9075 9 ай бұрын

you can pull bank 1 cylinder head and see with a dial indicator absolute tdc of #1cyl. and set timing advance from there. then you will have total over all timing gain and not just a 8-10 degree operating window. but be aware it will very easily over rev. it sounds like she has way more in her.

@GhostRyderFPV 9 ай бұрын

I felt what you felt when you popped the fan shroud on the radiator/heater core. Yes, it's going to work, it's been engineered to do so.... But Oh Gawd those poor fins, lol

@dboogeman2002 9 ай бұрын

This is so cool. Is there an actual output shaft on this motor? I would love to see it in action, possibly installed into a Barbie jeep🤷🏽🤟🏼

@american7169 9 ай бұрын

I just wish i had the time this guy does to do projects... Maybe my sandrail would be finished by now...

@robmadaffari6270 9 ай бұрын

If Toyota produced a mini UZFE I would buy it in a heart beat. Man I love this, the sound melts my heart.

@ethanwang2800 9 ай бұрын

Huge project ever

@justmechanicthings 9 ай бұрын

I love how you visibly see the v8 engine drinking fuel like a fish, just like a full scale model 😆

@buggerlugz6753 9 ай бұрын

Hey Johnny, you ever considered putting ITB's and a proper electronic ignition system on it?

@Effi1 9 ай бұрын

Amazing what a few degrees of ignition timing can do to the range of an engine

@richardcowan996 7 ай бұрын

Keep tweaking with it brother maybe a different carburetor intake setup it is definitely cool. After you get it running good would be cool to install it in some type of vehicle

@Evolyutsiya 9 ай бұрын

It still sounds like it's fight to rev, I'd be curious for you to check how many degrees your at. Is there any you can dyno that thing? Maybe hook up a small generator to it and add electric load 🤔

@Bass.Player 9 ай бұрын

It looked like the water pump shaft/shafts were damaged where they fit into the rear bearing? You may have to run a lubricant in the cooling system...

@BenKeeneOfficial 9 ай бұрын

Timing Sound very advanced now

@aaronmaharajh441 7 ай бұрын

Imagine if this could fit in the 5t, that would be so cool

@borderm3 9 ай бұрын

Does the distributor have centrifugal weights to establish a timing curve relative to the piston speed?

@jdudb 9 ай бұрын

Be careful at full throttle, it sounds like you are getting massive valve bounce. It may be that the ignition timing was set to limit RPM to protect the valves.

@jimwhite1061 8 ай бұрын

Good point. Who knows the float point of those itty-biddy valves

@mikediodato1109 9 ай бұрын

Im waiting for someone to make a scaled down version of the Lexus LFA engine. That would probably sound amazing.

@king_br0k 9 ай бұрын

What material did you 3d print the radiator shroud from?

@rootbeer666 9 ай бұрын

AFAIK antifreeze has poor cooling properties. As there any point in using it if the engine is always indoors?

@Gerry-K 2 ай бұрын

What is that rattling after timing adjustment at 5:40. Is it too far advanced, because it almost sounds like it pinging.

@ChuckWood 9 ай бұрын

Man, that motor is a piece of junk. Breaks after every 5 minutes of run time.

@yankeedoodle7693 9 ай бұрын

$2,800 dollar engine

@fry.master 9 ай бұрын

Well every component is sintered chineseium, and every fastener is borrowed from the same bin for the marital aids….

@joaquinmolina3465 9 ай бұрын

yesss new videoo i love ur content

@P_double_H 9 ай бұрын

This engine will fit perfectly in a Power Wheel.

@RC.Break.Build.Repeat 9 ай бұрын

It still sounds like it has more!😮

@mrsaizo0000 9 ай бұрын

That "Pocket CNC", do you have that at home??

@thepain353 9 ай бұрын

Could you make a roots style supercharger for this one?

@Debi2137 9 ай бұрын

Can you build proper turbo for this?

@user-be3sb1qs3g Ай бұрын

What is the speed on the motor is awesome project for speed boat's and car racer be safe God Bless you and your family

@troywarner9546 9 ай бұрын

it needs a vacuum advance

@shehlabashir5296 9 ай бұрын

What type of oil are you using brand and viscosity

@bluecollar58 7 ай бұрын

How many hours will these small engines last ? They must use bushings. Very cool.