Quarter Scale V8 Engine SCREAMS After Timing is Fixed!
Vložit
- čas přidán 22. 08. 2023
- ►Stirlingkit Black Friday: bit.ly/3R5Wchv
►Get the engine here➜ bit.ly/3YpMnfB
►Exhaust System➜ tinyurl.com/3ufpe6m4
►Other V8 engines ➜ bit.ly/3ErAduy
►Stirlingkit Flash Deals ➜ bit.ly/3IafXig
---------------------------------------------------------------
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
-----------------------------------------------------------------------------------
►Subscribe! bit.ly/2m1d1y7
►Instagram: johnnyq_90
►Support my videos!: / johnnyq90 - Věda a technologie
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.
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.
@@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
@@crissyb00cus it's cheap
@@crackedemerald4930 3k may be cheap to you, but it ain't for most
It's chinese garbage. What do you expect
i love how this thing has basically the same workings and maintenance requirements as a full size engine
As it should
And even emulates a full sized Ford engine's reliability...
Because it's an actual engine just smaller
If your unreliable full size engine was made in Germany.
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
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..
However i'd build one myself
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
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.
It is actually reversion. Which is most likely valve float related
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.
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
I thought I heard some detonation.
$2,800 dollar engine and the flywheel bolts shear off.
Excellent review- again.
Probably why it was limited to 5000 rpm from factory?
On the linked website it claims 9000 rpm max
How is a video of cheap chinese garbage where the "reviewer" doesnt even speak an "excellent review"?
@@deckname5794 like they 1,000,000mah power packs and 2,000,000 lumen torches?
What’s the stroke? It should be about feet per minute max at what, 3500?
Sounds a lot better then before, 2,800$ sounds too much for the water pump and the flywheel bolt to fail like that.
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.
@@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
@@blahorgaslisk7763 You can buy an actual full size V8 from a junk yard for that price
@@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.
2800 is for the bare minimum quality
I feel it has more to give ... keep tweaking
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
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.
Until you can spell which* and construct a coherent sentence I am thinking your opinion is irrelevant.
@@lastofthebest5102 ah nice pointing out my dyslexia, you must be fun at parties! uhm ACKTUALLY
@@lastofthebest5102clown 🤡
That looks almost exactly like the carburetor off my 2-stroke 25cc Echo weed eater
It still sounds like it could run even better if you could dial the phase even more precisely
Yep. Possibly fuel issues too.
Or throw that pos in the trash and build a new engine from scratch.
For next video series, you should install electronic fuel injection and electronic control ignition. Then we can see the real performance of this engine
It'll just break more quickly 🙂
The MegaSquirt will be bigger than the engine haha
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.
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!
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.
Good point
I feel like this needs to be the powerplant for a scooter. A V8 scooter just sounds too cool.
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?
It sounds like a bag of nails. English expression to say it sounds like it's f**ked 😂
Great work brother! Every adjustment is making it better and better👍👍
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!
Sounds so much better now . Awesome work as always
I would be very unhappy great work getting it going.
Thanks for the time and energy in making this video.
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.
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.
still a good idea to check everything you get. Helps you understand how it all works too
Protip: dont buy asian garbage.
I would love to see that motor in a quarter scale RC wood speed boat.
I want to see it put in a Power Wheels car.
keep on it. Love to see working out the problems and issues as it goes.
One of my favorites on CZcams.
Good morning from Arizona , amazing work Johnny .
Tuned perfectly. The sound of the machine is very smooth 🤤
Waiting for the “1:1 Scale V8 Engine” video😂
looks real cool & fun...... good job.
Man you are amazing at building
Excellent work so far, but it seems like there might be a bit more joy waiting for you find in this thing.
Awesome work!
Can i hear some ping after advancing timing? Or is just the exhaust
That engine sounds very cool
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.
Why was this re uploaded?
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.
Solid!
Top KEK!
Peace be with you.
Looking forward too what you put this in.
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.
Seems Like they always have a LOT of Bugs to work out....
Do they not Expect people to run the engines or? what LOL!
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
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.
After the first couple of revs and hearing it break up at higher RPM that was my gut reaction.
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.
@@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.
@@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.
@@ethancoy9237what is valve float?
Thank you for your videos
Amazing stuff thanks
This is totally fascinating😊
Dah boleh masuk kat moto dah ni..v8 padu bohh
I really love your content
carb jettings might need some adjustments but holyyy this is dope!
I still find it funny that it uses the same carburetors as a Poulan leaf blower
They are garbage.
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.
Amazing how much it sounds like a full size V8.
So good to see the engine getting the love it deserves still got a way to go but its getting there
Huge project ever
Please vicariously send me just a tiny amount of your patience and perseverance.
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.
I love how you visibly see the v8 engine drinking fuel like a fish, just like a full scale model 😆
Awesome job. Im wondering whats the lowest rom you can idle it... the lope would sound cool
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!
wonderful machine. how many hp does it produce
You'd have the most badass weedeater in the neighborhood with that!
Nice and perfect.
Bless
Those headers are absolutely beautiful. 👍👍
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
Would be awesome to have a collaboration with the Speeduino team, imagine this with a computer ignition timing map!
Are the inlet valves closing at the right time still?. Looks like its spitting back into the carbs as you rev it.
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.
Good point. Who knows the float point of those itty-biddy valves
Timing Sound very advanced now
yesss new videoo i love ur content
I wanna see this engine in a bigger scale car model...
Awesome Work
What model is that CNC you're using for the Delrin milling?
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
What great videos you have. Thanks Johnny!
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...
AFAIK antifreeze has poor cooling properties. As there any point in using it if the engine is always indoors?
I want 4 of these to put in my vehicle- one for each wheel and the equivilant to a full V8!
Amazing what a few degrees of ignition timing can do to the range of an engine
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
I just wish i had the time this guy does to do projects... Maybe my sandrail would be finished by now...
Fantastic video project , well done ,i like the phenolic spacers on the carbs , try using less glycol for better water cooling !!
If Toyota produced a mini UZFE I would buy it in a heart beat. Man I love this, the sound melts my heart.
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 🤔
Does the distributor have centrifugal weights to establish a timing curve relative to the piston speed?
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!
Hey Johnny, you ever considered putting ITB's and a proper electronic ignition system on it?
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
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!
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.
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.
it needs a vacuum advance
Imagine if this could fit in the 5t, that would be so cool
Has this motor been sorted yet ? as one other said, carby not quite right for application and, perhaps more timing advance and and, i had a v8 sprint car back in the s
day, it wouldnt rev. turns out too much fuel.
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.
Banging limiter now!
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🤷🏽🤟🏼
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
Im waiting for someone to make a scaled down version of the Lexus LFA engine. That would probably sound amazing.
What is that rattling after timing adjustment at 5:40. Is it too far advanced, because it almost sounds like it pinging.
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.
Could you make a roots style supercharger for this one?
What type of oil are you using brand and viscosity
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
It still sounds like it has more!😮