Quarter Scale V8 Engine SCREAMS After Timing is Fixed!

8 місяців тому

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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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КОМЕНТАРІ: 657

@johnkilo3 8 місяців тому

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 8 місяців тому

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 8 місяців тому

@@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 8 місяців тому

@@crissyb00cus it's cheap

@crissyb00 8 місяців тому

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

@gummel82 8 місяців тому

It's chinese garbage. What do you expect

@Duvstep910 8 місяців тому

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

@RedLine_Renesis 8 місяців тому

As it should

@MattBrownbill 8 місяців тому

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

@tesmat1243 8 місяців тому

Because it's an actual engine just smaller

@sharedknowledge6640 8 місяців тому

If your unreliable full size engine was made in Germany.

@Modna89 8 місяців тому

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

@yankeedoodle7693 8 місяців тому

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

@andycrask3531 8 місяців тому

Probably why it was limited to 5000 rpm from factory?

@deckname5794 8 місяців тому

On the linked website it claims 9000 rpm max

@lastofthebest5102 8 місяців тому

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

@andycrask3531 8 місяців тому

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

@Zairn12345 8 місяців тому

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

@ManiacRacing 8 місяців тому

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 8 місяців тому

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 8 місяців тому

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

@macedindu829 8 місяців тому

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 8 місяців тому

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 8 місяців тому

I thought I heard some detonation.

@johnayers3583 8 місяців тому

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

@schhomeimprovements2517 8 місяців тому

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

@aerykhurley8236 8 місяців тому

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 8 місяців тому

However i'd build one myself

@BirbieTheProto 8 місяців тому

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

@blahorgaslisk7763 8 місяців тому

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 8 місяців тому

@@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 8 місяців тому

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

@Eian_Anderson 8 місяців тому

@@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 8 місяців тому

2800 is for the bare minimum quality

@MilesPrower69420 8 місяців тому

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 8 місяців тому

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 8 місяців тому

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

@MilesPrower69420 8 місяців тому

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

@matt-bb2kv 8 місяців тому

@@lastofthebest5102clown 🤡

@jasonmurdoch9936 7 місяців тому

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

@andrewwhite986 8 місяців тому

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

@barthanes1 8 місяців тому

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

@shaun7057 4 місяці тому

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?

@ElPitch90 8 місяців тому

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

@JoseSilveira-newhandleforYT 8 місяців тому

Yep. Possibly fuel issues too.

@lastofthebest5102 8 місяців тому

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

@chrisarmstrong8198 8 місяців тому

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 6 місяців тому

Good point

@chrismaurer2075 8 місяців тому

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.

@zzyzx0069 8 місяців тому

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 8 місяців тому

It'll just break more quickly 🙂

@zadtheinhaler 8 місяців тому

The MegaSquirt will be bigger than the engine haha

@ethancoy9237 8 місяців тому

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.

@russellbautista619 8 місяців тому

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

@FunnyHaHa420 8 місяців тому

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

@Leroys_Stuff 8 місяців тому

I would be very unhappy great work getting it going.

@dennisdempseyradiooutofcontrol 8 місяців тому

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

@ferrarikingdom 8 місяців тому

Sounds so much better now . Awesome work as always

@forbiddenera 8 місяців тому

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!

@justmechanicthings 8 місяців тому

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

@therandomman6647 8 місяців тому

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

@walter9724 7 місяців тому

They are garbage.

@petemoss8245 7 місяців тому

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

@zedlesshorseman 8 місяців тому

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!

@gabrielmerza6904 8 місяців тому

Good morning from Arizona , amazing work Johnny .

@GhostRyderFPV 7 місяців тому

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

@brutalseed6643 8 місяців тому

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.

@villedocvalle 8 місяців тому

One of my favorites on UKposts.

@starpuss 8 місяців тому

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

@bobsrc9075 8 місяців тому

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.

@slucas601 8 місяців тому

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

@jerrybomcool 8 місяців тому

Why was this re uploaded?

@songkrantullachart4472 8 місяців тому

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

@poohssmartbrother1146 8 місяців тому

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.

@MitchSaidFahQ 8 місяців тому

You should make a monster truck for the same scale for that engine

@jimwhite1061 7 місяців тому

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 6 місяців тому

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 6 місяців тому

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.

@PressedSteel1919 8 місяців тому

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

@UQRXD 8 місяців тому

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

@evilroyslade2491 21 день тому

Thanks for the time and energy in making this video.

@jdudb 8 місяців тому

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 6 місяців тому

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

@malancaluciano1253 8 місяців тому

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

@user-zy3jw3oh9b 8 місяців тому

Solid! Top KEK! Peace be with you.

@tiporari 8 місяців тому

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.

@tehcheezman7471 8 місяців тому

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

@ethancoy9237 8 місяців тому

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.

@tehcheezman7471 8 місяців тому

@@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 8 місяців тому

@@tehcheezman7471 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 8 місяців тому

@@ethancoy9237what is valve float?

@michaelvette7659 7 місяців тому

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.

@shawmarcus1989 8 місяців тому

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

@sargemarine3709 7 місяців тому

Looking forward too what you put this in.

@soylentgreen9492 4 місяці тому

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

@jovanymorales1766 8 місяців тому

Nice and perfect. Bless

@ChuckWood 8 місяців тому

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

@yankeedoodle7693 8 місяців тому

$2,800 dollar engine

@fry.master 8 місяців тому

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

@Zairn12345 8 місяців тому

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.

@king_br0k 8 місяців тому

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

@robmadaffari6270 7 місяців тому

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

@JoshiJosho-mf8oi 7 місяців тому

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

@alparslanalialp3341 8 місяців тому

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

@markcanlast12rounds60 8 місяців тому

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

@jacquesb5248 8 місяців тому

wonderful machine. how many hp does it produce

@mikediodato1109 8 місяців тому

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

@BradynThibeault-dv8qg 8 місяців тому

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

@Effi1 8 місяців тому

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

@borderm3 8 місяців тому

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

@varqtube 8 місяців тому

Those headers are absolutely beautiful. 👍👍

@crabmansteve6844 8 місяців тому

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 8 місяців тому

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

@lastofthebest5102 8 місяців тому

Protip: dont buy asian garbage.

@dboogeman2002 8 місяців тому

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🤷🏽🤟🏼

@Djhg2000 8 місяців тому

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

@hkr321hkr 8 місяців тому

Amazing stuff thanks

@nashratify 8 місяців тому

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.

@SpeedyMercer 8 місяців тому

Need to make timing marks and use a timing light or dial indicator to set the static timing.

@thepain353 7 місяців тому

Could you make a roots style supercharger for this one?

@Bass.Player 8 місяців тому

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...

@RC.Break.Build.Repeat 8 місяців тому

It still sounds like it has more!😮

@masterSe7en77 8 місяців тому

I really love your content

@mrsaizo0000 8 місяців тому

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

@jSHKR 8 місяців тому

would you consider doing Pocket NC V2 CAN tutorials?

@davecaresforyou7606 5 місяців тому

Man you are amazing at building

@ethanwang2800 8 місяців тому

Huge project ever

@glenhar1225 8 місяців тому

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

@shehlabashir5296 8 місяців тому

What type of oil are you using brand and viscosity

@ellisonlowrimore7751 6 місяців тому

Awesome work!

@lilydafoxchan 8 місяців тому

Thing sounds like a voodoo 5.2 v8 at high rpms xD

@Debi2137 8 місяців тому

Can you build proper turbo for this?

@american7169 8 місяців тому

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

@buggerlugz6753 7 місяців тому

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

@jamesgarrard4361 8 місяців тому

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

@joaquinmolina3465 8 місяців тому

yesss new videoo i love ur content

@ForrestGumpWR 8 місяців тому

What great videos you have. Thanks Johnny!

@sannyassi73 7 місяців тому

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

@markboniface6579 4 місяці тому

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

@kakswell 8 місяців тому

ide love to see you dyno these engines somehow and put them to work somehow

@KevinPlays244 8 місяців тому

One day we r gonna get a small working prototype in a small scale❤

@mala7794 8 місяців тому

where did u get the thermal camera for your phone?

@Guns_N_Gears 7 місяців тому

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"

@MrXhandsome 8 місяців тому

This engine will fit perfectly in a Power Wheel.

@detaart 8 місяців тому

I don't know what detonation should sound like in a small engine like this, but i'm pretty sure i heard it pinging.

@MFToes 8 місяців тому

what therrmal imager instrument do you use?

@cymaz100 8 місяців тому

Where did you source the ignition please

@Rick_Dunaway 8 місяців тому

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!

@charlesball6519 7 місяців тому

Is that ice forming in the carbs?

@genefogarty5395 7 місяців тому

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.