Quarter Scale V8 Engine SCREAMS After Timing is Fixed!

Рет қаралды 930,766

10 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: 679

@johnkilo3 10 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 10 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 10 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 10 ай бұрын

@@crissyb00cus it's cheap

@crissyb00 10 ай бұрын

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

@gummel82 10 ай бұрын

It's chinese garbage. What do you expect

@Duvstep910 10 ай бұрын

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

@RedLine_Renesis 10 ай бұрын

As it should

@MattBrownbill 10 ай бұрын

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

@tesmat1243 10 ай бұрын

Because it's an actual engine just smaller

@sharedknowledge6640 10 ай бұрын

If your unreliable full size engine was made in Germany.

@Modna89 10 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

@aerykhurley8236 10 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 10 ай бұрын

However i'd build one myself

@Cyge240sx 17 күн бұрын

If that is your thought then it is deff not your hobby. I don't understand why I like to watch these vids but I to would never buy one EDIT: I would assume that for him all the tuning and tinkering is exactly what he likes about it

@aerykhurley8236 17 күн бұрын

@@Cyge240sx Youre welcome to assume that. I have one of the largest RC collections in the world, so this is definitely my hobby.. Maybe thats why i know the quality it takes to make a decent engine? Maybe my comment isnt just some random guy on the internet talking shit, but a lifetime of knowledge and experience talking? These little engines are awesome, but theyre chineseium, and not built well. Cast parts vs machined, etc. Dont believe me? Watch the video again.

@ManiacRacing 10 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 10 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 10 ай бұрын

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

@macedindu829 10 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 10 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 10 ай бұрын

I thought I heard some detonation.

@yankeedoodle7693 10 ай бұрын

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

@andycrask3531 10 ай бұрын

Probably why it was limited to 5000 rpm from factory?

@deckname5794 10 ай бұрын

On the linked website it claims 9000 rpm max

@lastofthebest5102 10 ай бұрын

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

@andycrask3531 10 ай бұрын

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

@Zairn12345 10 ай бұрын

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

@BirbieTheProto 10 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 10 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 10 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 10 ай бұрын

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

@Eian_Anderson 10 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 10 ай бұрын

2800 is for the bare minimum quality

@MilesPrower69420 10 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 10 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 10 ай бұрын

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

@MilesPrower69420 10 ай бұрын

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

@matt-bb2kv 10 ай бұрын

@@lastofthebest5102clown 🤡

@jasonmurdoch9936 9 ай бұрын

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

@schhomeimprovements2517 10 ай бұрын

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

@ElPitch90 10 ай бұрын

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

@JoseSilveira-newhandleforYT 10 ай бұрын

Yep. Possibly fuel issues too.

@lastofthebest5102 10 ай бұрын

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

@chrisarmstrong8198 10 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

@chrismaurer2075 10 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.

@johnayers3583 10 ай бұрын

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

@forbiddenera 10 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!

@dennisdempseyradiooutofcontrol 10 ай бұрын

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

@zedlesshorseman 10 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!

@zzyzx0069 10 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 10 ай бұрын

It'll just break more quickly 🙂

@zadtheinhaler 10 ай бұрын

The MegaSquirt will be bigger than the engine haha

@ethancoy9237 10 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.

@ferrarikingdom 10 ай бұрын

Sounds so much better now . Awesome work as always

@andrewwhite986 10 ай бұрын

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

@barthanes1 10 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?

@willgilliam9053 18 күн бұрын

Ive been having the exact same thought....

@evilroyslade2491 2 ай бұрын

Thanks for the time and energy in making this video.

@Leroys_Stuff 10 ай бұрын

I would be very unhappy great work getting it going.

@petemoss8245 9 ай бұрын

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

@gabrielmerza6904 10 ай бұрын

Good morning from Arizona , amazing work Johnny .

@villedocvalle 10 ай бұрын

One of my favorites on KZfaq.

@russellbautista619 10 ай бұрын

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

@FunnyHaHa420 10 ай бұрын

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

@slucas601 10 ай бұрын

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

@starpuss 10 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!

@brutalseed6643 10 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.

@bobsrc9075 10 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.

@crabmansteve6844 10 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 10 ай бұрын

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

@lastofthebest5102 10 ай бұрын

Protip: dont buy asian garbage.

@nashratify 10 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.

@jerrybomcool 10 ай бұрын

Why was this re uploaded?

@markboniface6579 7 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

@davecaresforyou7606 8 ай бұрын

Man you are amazing at building

@tiporari 10 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 10 ай бұрын

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

@ethancoy9237 10 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 10 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 10 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 10 ай бұрын

@@ethancoy9237what is valve float?

@ellisonlowrimore7751 8 ай бұрын

Awesome work!

@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.

@user-zy3jw3oh9b 10 ай бұрын

Solid! Top KEK! Peace be with you.

@BradynThibeault-dv8qg 10 ай бұрын

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

@PressedSteel1919 10 ай бұрын

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

@wankedah84 10 ай бұрын

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

@poohssmartbrother1146 10 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.

@sargemarine3709 9 ай бұрын

Looking forward too what you put this in.

@hkr321hkr 10 ай бұрын

Amazing stuff thanks

@user-kj1od5ed7p 26 күн бұрын

Thank you for your videos

@therandomman6647 10 ай бұрын

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

@walter9724 9 ай бұрын

They are garbage.

@jerry-xi4gi 15 күн бұрын

great video work, great lil engine..!!!

@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

@shawmarcus1989 10 ай бұрын

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

@markcanlast12rounds60 10 ай бұрын

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

@justmechanicthings 10 ай бұрын

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

@agaldoo 7 ай бұрын

That engine sounds very cool

@jovanymorales1766 10 ай бұрын

Nice and perfect. Bless

@Djhg2000 10 ай бұрын

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

@billmadle1235 4 ай бұрын

This is totally fascinating😊

@soylentgreen9492 6 ай бұрын

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

@Zairn12345 10 ай бұрын

With that cubic inch motor, 4.75 inches, I estimated a 10cfm head flow through those heads, with a 100% efficiency, the calculator I’m using says the engine should be able to reach 21,946 rpm, or basically 22k. More research is needed, but such a tiny motor should spin WAY higher than its big counterparts. Another Calc I used showed a max piston speed of under 4000, so you would need forged internals for that, but it indicated a max rpm of 19,500. Similar to my estimation above. With those two stats combined, I don’t think I’m far off.

@jdudb 10 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

@Rick_Dunaway 10 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!

@masterSe7en77 10 ай бұрын

I really love your content

@malancaluciano1253 10 ай бұрын

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

@jacquesb5248 10 ай бұрын

wonderful machine. how many hp does it produce

@alparslanalialp3341 10 ай бұрын

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

@kelevra558 10 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

@JazzbLu 10 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!

@songkrantullachart4472 10 ай бұрын

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

@troywarner9546 10 ай бұрын

it needs a vacuum advance

@jimwhite1061 9 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 8 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.

@Guns_N_Gears 9 ай бұрын

Before i started repairing small engines decades ago, an old man small engine mechanic once told me 99% of carburetor problems are actually "ignition issues"

@TexasNEV 2 ай бұрын

Amazing how much it sounds like a full size V8.

@muttbone01 2 ай бұрын

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

@buggerlugz6753 9 ай бұрын

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

@JoshiJosho-mf8oi 9 ай бұрын

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

@varqtube 10 ай бұрын

Those headers are absolutely beautiful. 👍👍

@dboogeman2002 10 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🤷🏽🤟🏼

@Effi1 10 ай бұрын

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

@richardcowan996 8 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

@ethanwang2800 10 ай бұрын

Huge project ever

@jamesgarrard4361 10 ай бұрын

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

@genefogarty5395 9 ай бұрын

PRC junk, my '80's Conleys run like Swiss watches. Valve springs need constant checking for seat pressure because the material loses its memory so fast due to its lack of size from heat, but when they're new, they run, they run beautifully.

@robmadaffari6270 10 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.

@joaquinmolina3465 10 ай бұрын

yesss new videoo i love ur content

@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!

@gianttrance5180 8 ай бұрын

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

@american7169 10 ай бұрын

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

@BenKeeneOfficial 10 ай бұрын

Timing Sound very advanced now

@king_br0k 10 ай бұрын

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

@glenhar1225 10 ай бұрын

They probably limited revs intentionally to keep it from being a grenade. They dont seem to made to specs to actually use as real powerplants, but rather semi-working display pieces

@jiviteshpandab6194 10 ай бұрын

great, maybe there is some room for perfection, after that, you can add some sort of forced induction and intercooling if needed, I think that would be great, tbh Ive never seen someone supercharge or turbocharge and add an intercooler

@Evolyutsiya 10 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 🤔

@carbonEYE007 6 ай бұрын

Those are 2cycle carbs so you needed to lean the high speed out quite a bit from a 2cycle setting.

@mikediodato1109 10 ай бұрын

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

@borderm3 10 ай бұрын

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

@aaronmaharajh441 7 ай бұрын

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

@CaptainCraigKWMRZ 13 күн бұрын

I learned about cars and engines by holding the light while my father cursed and beat his knuckles up! 😅

@171apples171 10 ай бұрын

Im reading the comments and apparently this thing cost around 3 grand? I collect small engines(old horizontal shaft stationary stuff) Dont get me wrong, its badass.. and im always happy to see someone enjoying a project. Youve done really good work with the improvements. But i gotta ask, do you know how fast you can go with 3k? Like 200mph if you spent it on a crotch rocket (and with the right gearing). For 3 grand, you could go pick up a small block chevy and a project car and actually do some burnouts. The "bang for buck" on this little motor is not very much.

@Bass.Player 10 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...

@FeralDayASMR 10 ай бұрын

so its a reupload? what i said in the now not existing video those model engines seem to often be very troubled with pumps and carbs

@Veridiania 8 ай бұрын

Stormworks 1 by 1 cylinder engines: AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

@bw6378 10 ай бұрын

It would probably run even better if you could rig it up to rotate the distributor for more advance with throttle position, basically the same as how old outboard motors do it.