Quarter Scale V8 Engine SCREAMS After Timing is Fixed!

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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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Опубликовано:

22 авг 2023

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Комментарии : 678

@johnkilo3 10 месяцев назад

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 месяцев назад

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 месяцев назад

@@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 месяцев назад

@@crissyb00cus it's cheap

@crissyb00 10 месяцев назад

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

@gummel82 10 месяцев назад

It's chinese garbage. What do you expect

@Duvstep910 10 месяцев назад

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

@RedLine_Renesis 10 месяцев назад

As it should

@MattBrownbill 10 месяцев назад

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

@tesmat1243 10 месяцев назад

Because it's an actual engine just smaller

@sharedknowledge6640 10 месяцев назад

If your unreliable full size engine was made in Germany.

@Modna89 10 месяцев назад

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

@ManiacRacing 10 месяцев назад

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 месяцев назад

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 месяцев назад

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

@macedindu829 10 месяцев назад

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 месяцев назад

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 месяцев назад

I thought I heard some detonation.

@yankeedoodle7693 10 месяцев назад

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

@andycrask3531 10 месяцев назад

Probably why it was limited to 5000 rpm from factory?

@deckname5794 10 месяцев назад

On the linked website it claims 9000 rpm max

@lastofthebest5102 10 месяцев назад

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

@andycrask3531 10 месяцев назад

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

@Zairn12345 10 месяцев назад

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

@aerykhurley8236 10 месяцев назад

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 месяцев назад

However i'd build one myself

@Cyge240sx Месяц назад

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 Месяц назад

@@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.

@BirbieTheProto 10 месяцев назад

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 месяцев назад

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 месяцев назад

@@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 месяцев назад

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

@Eian_Anderson 10 месяцев назад

@@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 месяцев назад

2800 is for the bare minimum quality

@MilesPrower69420 10 месяцев назад

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 месяцев назад

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 месяцев назад

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

@MilesPrower69420 10 месяцев назад

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

@matt-bb2kv 10 месяцев назад

@@lastofthebest5102clown 🤡

@jasonmurdoch9936 10 месяцев назад

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

@schhomeimprovements2517 10 месяцев назад

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

@ElPitch90 10 месяцев назад

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

@JoseSilveira-newhandleforYT 10 месяцев назад

Yep. Possibly fuel issues too.

@lastofthebest5102 10 месяцев назад

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

@zzyzx0069 10 месяцев назад

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 месяцев назад

It'll just break more quickly 🙂

@zadtheinhaler 10 месяцев назад

The MegaSquirt will be bigger than the engine haha

@ethancoy9237 10 месяцев назад

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 10 месяцев назад

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

@chrisarmstrong8198 10 месяцев назад

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 9 месяцев назад

Good point

@chrismaurer2075 10 месяцев назад

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.

@ferrarikingdom 10 месяцев назад

Sounds so much better now . Awesome work as always

@dennisdempseyradiooutofcontrol 10 месяцев назад

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

@barthanes1 10 месяцев назад

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

@shaun7057 7 месяцев назад

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 Месяц назад

Ive been having the exact same thought....

@forbiddenera 10 месяцев назад

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!

@johnayers3583 10 месяцев назад

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

@zedlesshorseman 10 месяцев назад

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!

@evilroyslade2491 3 месяца назад

Thanks for the time and energy in making this video.

@gabrielmerza6904 10 месяцев назад

Good morning from Arizona , amazing work Johnny .

@petemoss8245 10 месяцев назад

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

@russellbautista619 10 месяцев назад

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

@FunnyHaHa420 10 месяцев назад

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

@villedocvalle 10 месяцев назад

One of my favorites on RU-vid.

@Leroys_Stuff 10 месяцев назад

I would be very unhappy great work getting it going.

@brutalseed6643 10 месяцев назад

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.

@ellisonlowrimore7751 9 месяцев назад

Awesome work!

@PressedSteel1919 10 месяцев назад

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

@therandomman6647 10 месяцев назад

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

@walter9724 10 месяцев назад

They are garbage.

@slucas601 10 месяцев назад

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

@nashratify 10 месяцев назад

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.

@davecaresforyou7606 8 месяцев назад

Man you are amazing at building

@starpuss 10 месяцев назад

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

@markboniface6579 7 месяцев назад

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

@tiporari 10 месяцев назад

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 месяцев назад

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

@ethancoy9237 10 месяцев назад

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 месяцев назад

@@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 месяцев назад

@@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 месяцев назад

@@ethancoy9237what is valve float?

@user-zy3jw3oh9b 10 месяцев назад

Solid! Top KEK! Peace be with you.

@bobsrc9075 10 месяцев назад

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.

@hkr321hkr 10 месяцев назад

Amazing stuff thanks

@jerry-xi4gi Месяц назад

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

@user-kj1od5ed7p Месяц назад

Thank you for your videos

@sargemarine3709 9 месяцев назад

Looking forward too what you put this in.

@poohssmartbrother1146 10 месяцев назад

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.

@jovanymorales1766 10 месяцев назад

Nice and perfect. Bless

@wankedah84 10 месяцев назад

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

@BradynThibeault-dv8qg 10 месяцев назад

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

@masterSe7en77 10 месяцев назад

I really love your content

@justmechanicthings 10 месяцев назад

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

@billmadle1235 5 месяцев назад

This is totally fascinating😊

@soylentgreen9492 7 месяцев назад

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

@markcanlast12rounds60 10 месяцев назад

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

@joaquinmolina3465 10 месяцев назад

yesss new videoo i love ur content

@GhostRyderFPV 10 месяцев назад

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

@agaldoo 7 месяцев назад

That engine sounds very cool

@Djhg2000 10 месяцев назад

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

@michaelvette7659 10 месяцев назад

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.

@Rick_Dunaway 10 месяцев назад

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!

@jdudb 10 месяцев назад

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 9 месяцев назад

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

@Veridiania 9 месяцев назад

Stormworks 1 by 1 cylinder engines: AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

@JoshiJosho-mf8oi 10 месяцев назад

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

@kelevra558 10 месяцев назад

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

@TexasNEV 3 месяца назад

Amazing how much it sounds like a full size V8.

@shawmarcus1989 10 месяцев назад

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

@jimwhite1061 9 месяцев назад

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 9 месяцев назад

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 9 месяцев назад

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.

@sannyassi73 10 месяцев назад

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

@dz-abouttechnique1849 10 месяцев назад

Cool!

@alparslanalialp3341 10 месяцев назад

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

@jacquesb5248 10 месяцев назад

wonderful machine. how many hp does it produce

@JazzbLu 10 месяцев назад

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!

@american7169 10 месяцев назад

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

@ethanwang2800 10 месяцев назад

Huge project ever

@dboogeman2002 10 месяцев назад

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 месяцев назад

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

@richardcowan996 8 месяцев назад

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

@songkrantullachart4472 10 месяцев назад

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

@ForrestGumpWR 10 месяцев назад

What great videos you have. Thanks Johnny!

@buggerlugz6753 10 месяцев назад

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

@BenKeeneOfficial 10 месяцев назад

Timing Sound very advanced now

@UQRXD 10 месяцев назад

Two finger choke on weed whacker carburetors. Mufflers blowing off, love it.

@Evolyutsiya 10 месяцев назад

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 🤔

@LegendSpecialist 10 месяцев назад

Nice👌

@varqtube 10 месяцев назад

Those headers are absolutely beautiful. 👍👍

@tombrown5755 9 месяцев назад

That's cool

@mikediodato1109 10 месяцев назад

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

@Zairn12345 10 месяцев назад

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.

@jamesgarrard4361 10 месяцев назад

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

@FeralDayASMR 10 месяцев назад

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

@malancaluciano1253 10 месяцев назад

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

@aaronmaharajh441 8 месяцев назад

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

@Bass.Player 10 месяцев назад

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...

@jerrybomcool 10 месяцев назад

Why was this re uploaded?

@joshmanis9860 10 месяцев назад

i wish i had a 5 axis mill and a lathe i used an old air filter adapter my moms dremel tool and my concrete driveway to "machine" a new carb spacer for my intek vtwin forgot to mention i used a old mac and cheese box to make new gaskets and it worked no vacuum leaks

@troywarner9546 10 месяцев назад

it needs a vacuum advance

@RC.Break.Build.Repeat 10 месяцев назад

It still sounds like it has more!😮

@gianttrance5180 9 месяцев назад

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

@crabmansteve6844 10 месяцев назад

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 месяцев назад

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

@lastofthebest5102 10 месяцев назад

Protip: dont buy asian garbage.

@robmadaffari6270 10 месяцев назад

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

@user-be3sb1qs3g 2 месяца назад

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

@owo_dozer3412 10 месяцев назад

NO WAY NEW VID

@bw6378 10 месяцев назад

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.