Tuning the NASKART! It’s So POWERFUL!
Vložit
- čas přidán 20. 11. 2019
- Hey Guys, Migs Here! In today’s video, I am tuning the half scale NASCAR on its new set up! This go kart has a 750cc engine in it that was swapped out of a 1980 Honda CB750c. I get it running as good as possible with the new dual 34mm Mikuni carburetor set up and take it for a test drive! Thanks for Watching! Please Subscribe, Like, Comment and Tell Your Friends About the Channel!
- Auta a dopravní prostředky
Your going to need to keep those carbs from hanging just on the pvc manifolds. We added zip ties to help support the carbs. If you over tighten the clamps on the pvc it will cause the pvc to shrink causing a leak. Oh yea mufflers are a must to help with the tuning. Good luck
You guys should put the other snowmobile engine on ugly and then race murry kilowatts vs pugly.
can u guys please step in and help this guy b4 he actually hurts him self dropping the motor out the bottom or getting hit with the chain or somthing silly just dont wanna see him hurt
And change the manifolds to a Y shape so it’ll run smoother
@MotoMigs. listen to Ike he has one and they got plenty of comments about the exhaust causing the 750 not to run. Also to get an accurate measure of what works and what doesnt a road test would be much more helpful. Love the Build and good luck.
you definite need some sort of exhaust , to tune .
One cylinder is getting most of the fuel and the other is being starved. Please center the flow to eliminate that problem. This can peace to big problems if not addressed.
True I was just going to typ that
Yup and the main jet may be too small for this set up. Need to figure out what the 4 factory jets were and calculate what it should be for dual
I said the same thing make a better y style intake with a equal inlet path
For not having a bunch of money good job kido
you saved me from commenting on the same thing
The tensioner needs to be on the bottom because that's where the slack is in the chain when going forward. In reverse the slack would be on the top
Yup hes right
Was going to say the same thing.
Haven’t we had this conversation before.??
@@justhangini6706 probably yea lol
Yes i had to just now come back to make sure this was known
I think your air intake tubes need to be split like a Y instead of them being like an L, basically cylinder 2 and 3 are getting more gas/air than 1 and 4
This!
EXACTLY!
Lol facts
I agree first problem I saw as well
True
Engine nearly came flying off 😂😂 @ 13:40
Jacko lmaoooo🤣🤣🤣
Another reason his chain is falling off
Its not even attached. at 16:09 he pushes the whole motor of to one side.
Josh Willard holy shiii
His engineering skills are lacking compared to his imagination...
Migs goes nowhere
Also migs: oh it’s really fast
Stalled doing 5mph in first ya I'd say it's going to be fast but he dont have room he cant even gass it without being 3 neighbors down before he can hit the brake
@@dustinmiller7278 then why the fuck is he making this over powered thing if he cant even run it?
Migs: stalls engine
Also Migs: YO WHY WE GOIN SO *FAST* !
@@kalefree6007 lmfaoo i know haha i didnt wana say it to keep hope alive but its true haha. Id say... about 10 bucks in scrap here.
He's gotta learn. It'll be ok. I'm sure he wants more tools.
On my motorcycle, as I brake to stop, I simultaneously have to squeeze the clutch or it will stall. It wont keep idling if you leave it in gear and stop. As you start to slow down to a stop, you need to squeeze the clutch all the way to take it out of gear so it wont stall the engine... If you are simply rolling/no accelerating, say at 20 MPH, you don't have to squeeze the clutch but then as you slow even further, you'll need to switch to a lower gear or squeeze the clutch and hold it as not to stall.. GREAT JOB!
That thing looks like a monster also put the chain tensioner under the chain it will work a lot better
You were going 5 miles an hour and you were scared it was too fast priceless
Defo comin along good na fella
Keep up the work n lookin forward to the next video 👍🏻👍🏻
love the welding.. holy moly
Congrats dude. It’s almost there and it’s exciting. Can’t wait till the next video.
Nobody :
Literally Nobody :
Migs : (Going 2kph) Holy this is fast!!
😂😂😂
😂 I felt how how capable it is of being fast once the chain doesn’t slip anymore, I guess I was talking in the future tense but in the present lol
@@motomigsofficial I get ya man, it pulls you right into the seat even at the slightest slip lol. Been there, that sensation is insane.
You need to un-kink the fuel line and get mufflers! I love the build!
Anyone else noticed that the whole engine moves whenever he puts it in gear and lets out the clutch. Probably why the chain keeps coming off. And when he pushes the the tensioner back into place the whole engine move to the side. Needs to check them engine mounts and make sure that beast is snuged down. Great build love watching the transformation!
Your engine is moving on the mounts or they are flexing
Oh my god I love your content!
Liked and subscribed!
Good luck!
Awesome vid man. People severely underestimate the ability to diagnose mechanical problems. Can’t wait to see u tackle some bigger and faster engines!!! Sub’d.
Yes dude that is awesome you don’t know how excited I am for that just hearing it idle was awesome keep up the good work
I feel your excitement too! Lol, Thanks man!
Keep at it kid! You have a long and wonderful road ahead of you, figuring things out, tweaking and having fun. Enjoy it!
This guy is not the sharpest chain in the box...
When you get it right and fix the chain tensioner and brakes, I will cheer you on! You getting better! You doing great!
I envy this kid. Keep up the good work and motivation man!
Dude keep this up thats sick
soooo sick alreay here from 34k subs keep up tha good work
Awesome Job
drives 3mph around lawn. 13:00
"OOOOH OOOH ITS FAST, ITS FAST!"
These engines are setup to run with very particular intake and exhaust designs. Everything is flow matched together. Cams, head design, ignition timing and everything are carefully balanced. Winging it is tough. Check your plugs. They will tell you a lot about how it is running. Fouling, carbon build up, overcooked, etc. May need to open or close the gaps a bit to compensate for airflow differences.
Are we not gonna talk about the huge kink in the gas line
Sounds good mig's sounds real good good job buddy
great job
I love how he kinda panics when he rides it
That how it feels when you put so Mitch work , and at the end you can drive it
Super cool keep up the good work kid
awesome!
Great job
It’s gonna rip once you get all ready.Good job.
That thing sounds like an actual NASCAR in those clips of it running that you through in there early on LOL
Sweet lil car nice biuld
Like yo vibe bro good video
OH MY GOD IT'S SO FAST!! As he's doing 6mph lol.....cool cart though buddy keep up the good work 👍👍
It’s sounds so sick !
Put some mufflers on it theres no back pressure so it wont run properly
oh heel yea ,difference between diamonds and donuts .. . . . . .
Your just wasting your breathe bud. Not to mention flames shooting out badly. He's also doing 3 mph and claiming its fast lol. He obviously has now clue how a carbed engine works lol. Should stick with his efi
@@checkforfleas9452 considering he was in 1st and stalled it at like 5 mph says it will easily do 35 to 40 in 1st so yes it is fast to damn fast for that frame
@@dustinmiller7278 oh no I'm not saying its not. I know what engine can do I have a cb750c
don't you know?....you tubers pay no attention to common sense comments.....besides , you get more clicks when you do absolutely no research to further your knowledge of what your doing , but then tell everyone that you did some research.....this kids a bone head man.
Your engine it's totally loose, consing the chain escaping, recorded this 🙏
First of all, you need a balance tube from manifold to manifold. This will take away the erratic behavior. It balances the vacuum and makes the engine run much smoother. Also the chain tentioner goes on the slack side of the chain (the bottom). Ask your shop teacher about it. Do these things and your ready to rock and roll!
When are you going to run it on the road I want to see how fast it is and how well it handles
Your getting it there, I see Ike (cars and cameras) commented so you have a good support team here to help when you need them but your doing good, it's a trial and error build until it all comes together. Keep the videos coming.
You’re making great progress I’m sure you’re learning a lot definitely drill those jets out even the pilot jets but things barely running when it is. get a hold of Isaac on cars and cameras see what he suggests. keep it up man
I'm at the beginning of the video and if your still having trouble with the pump for the fuel, if you were to raise the fuel tank where it sits higher. Preferable above the motor then it can just be gravity fed and wouldn't even need any fuel pump at all. But I do like how it's set up, or even just for testing purpose only you can un-bolt the fuel tank and just hold it where it's above the carb level and just have a new hose (straight hose) without anything on it. Just from the tank to carbs.
Then you can tell if it is a fuel pump issue (not getting enough fuel) or if the float in the carbs is sticking) or whatever it could be. But that's a good way to do the process of elimination to find out what it is for sure.
Long a waited but worth it
Bro, that's a legit build!
One thing that could lead to not so much a problem but could lead to tuning/inconsistency issues is that your carbs are both directly inline with the 2 inner cylinders while the two outside cylinders basically have 2 90 degree bends to pull air/fuel through where the 2 inner cylinders have a short straight pull from the carb and could be taking most of the air/fuel mix. If it were me I'd try to center each carb between the 2 cylinders and Put a Y in to make each intake runner equal giving each cylinder the same air/fuel intake. Just a suggestion if you run into any hiccups it's something you can look at. The rest of the cart looks sick I like the full cage chassis it looks nice and solid.
Great job ole Dale would be proud. Ok my question what brand carbs are those and where can I order 2 from
I love your Pasion for this lil kart I live in Vermont I noticed your hoodie are you in Vermont or just like it here? any way love the build keep pushing foward and Ty from Sean in Vt
One) Isaac of it'll be fine is reaching your way- reach back; he and John just learned a bucket about the Honda CB 750 engine, and are running the same PVC manifold you are- the short legs are minimizing the flow difference between the inside cylinders and the outside; a bigger performance would result form a "balanced design"- later, Two) the tuned exhaust would be very helpful, particularly on a two stroke engine- the CB 750 is a four stroke engine; as long as all the cylinders have equal length and bends, out to about 30" length you should be on solid ground- go to a "bricks and sticks" MC performance store and measure several CB750 header designs- the pipe length from the engine to the larger collector point is what you are going for; four stroke motors are not nearly as fussy about short pipes; if noise is a problem, get some tips for an older air cooled VW; JC Whitney of Chicago used to mail order these, Three) You are on point re the very stable, stiff clutch cable system and you are dead on about brakes, Four) I am not sure, but the motor may well be moving when in gear- more solid, and more of engine mounting may be necessary, Five) The comments about the chain tensioner being on the wrong side are right- it should be on the slack side of the chain and not on the load side.
Don't sweat it- for a "self taught" mechanic, with a strong jones to make it quick, you are doing great- several of my early projects (in the late '50s) were much less safe, and had much 'teething" before I could get to the "fast, faster, fastest" part. You will get there! And we will all be eating popcorn. watching!FR
Hey buddy, you've got the right concept for the dual carb conversion, but with the intakes being 2 separate lengths the the cylinders will be running half rich half lean, because they are unequal length intakes. Your best way would to do even Ys for either side..
Id look at making an intake manifold that flows more even there's a lot of turbulence going on
I'm here before 50 views good job keep up the good work
Those lil brakes you put on awhile back were cute but ummm yeah, thankin might get beakes off an old golf kart, cheap and easy... good luck ,, can't wait till your rippin!!
This literally looks like a slow version of a micro sprint car
Carbs have a direct path into one cylinder while the outer cylinders have the 90 and longer indirect path. If you used 2 90's into a (T) then carb off center of the (T) it would have even pathways. It may help. Intake signal has to even to all 4 cylinders two outer cylinders are leaning out inner 2 are fueling rich.
i didn’t just wait 2 weeks for this
yes you did. and unfortunately, I did too.
Right lol
Dude you gotta get a crossplane R1 engine and get it together for this car in a future. Remember that R1 engines sound literally like NASCAR.
👍👌, go you.
How'd your tests go?
U are doing good man u will get it fine tuned. Than can clean a few things up after
Idk if any else has mentioned this yet, but what do you think of the idea that you need to group together cylinders 1-3, and 2-4 instead of the 1-2,3-4. It has to do with the pulsing of the intake of air through the carbs makes the air flow more evenly.
If the tensioner is on top, it gets the torque of the engine. The bottom of the chain is output and it doesn’t pull as violent
IDLER PULLEY (TENSIONER) MUST BE ON THE BOTTOM BECAUSE THAT IS WHERE THE SLACK IS, THE TOP CHAIN ALWAYS STAYS TIGHT BECAUSE THAT'S WHERE THE MOTOR PULLS AND KEEPS IT TIGHT.
Has there been any other problems with the jack shaft
probably break off in the future
There were in the past, but ever since I reinforced it, I haven’t had any issues at all, and hopefully it stays that way!
Some advice,
Get rid of those pvc intake pipes. That configuration is starving the two outer cylinders. The intake needs to be split evenly like a "Y" to run just two carbs. Or you can go back to four carbs.
You should also finish the exhaust and mufflers, it will affect how it runs.
If you have to choke it to get it to run, it's not getting enough fuel.
Get it professionally tuned before you burn a piston from being too lean or you wash down the cylinders from it being too rich. Either scenario will ruin the engine.
You should just take it up and down the street to test it properly
Nice one. If you wear your helmet back to front, it'll protect your face from the screen rail when you have a shunt.
you have a kink in the fuel line running to your fuel pressure regulator
Cars and cameras crosscart benefitted greatly from mufflers I wonder if this one might be a similar situation?
An engine DOESNT need air filters or mufflers to run right as long as the carb is properly tuned without air filter and open headers. If you need to keep the choke close to make it run half descent, that means you need more fuel! (bigger jets).
You need to put the tensioner on the bottom because all the tention is on the top from the drive sprocket trying to turn the big sprocket and leaving the slack on the bottom
Carsandcameras has a similar 750cc setup and similar issues and they turned out doing the same carburetor swap you have. They had all sorts of issues but finally fixed it. They replaced the coil, wires, and plugs, but also put on a full exhaust and now it runs great. You might send them message to see what they think. They might be able to tell you how to tune the carburetors better. I think lean runs hotter exhaust, so exhaust temps might help you balance them. Put a real exhaust and muffle on it though. All you are doing is pissing off your neighbors running straight pipes.
I've had several 80's CB Honda's...My 900 did not like cold weather with short air cleaners...It needs more throat to run correct unless you change the air fuel mix adjustment.
U need those carbs supported other than With pvc pipe😉 And a carb sync would help the cutout a lot😉 awesome project btw!
Looks to me like the center two carburetors would be pulling most of the fuel, as its a straight line to them, and the outside carburetors have to go around a 90° bend. When you give it gas there is more suction so they level out. JMO. You need more of a Y from the intake to the carburetor.
that might be true if all carbs was sucking at the same time. But all cylinders have different fireing order. if the heads where off you could see that all the pistons dont move identicle. So if one cylinder is sucking in fuel, the other has the valves closed. Dont now if that is the case on this engine(that migs paird up the right 2 cylinders) but if done right that bend should not be much of a problem.
I really need some of these for my AirPods tbh 1:21 😂
Good vid
The chain tensioner on the motor needs to be on the bottom. The top of the chain gets tighter when you are driving and it makes slack on the bottom. Put the tensioner on the bottom with a spring and you won't have no more problems. And fix the intakes. If you want to use PVC you have to have 4 tees and have the carbs on the ends. if not get two more carbs and dumb them down a little.
Valves, bigger tank, fix motor mounts and put your chain tensioner on the bottom. A better exhasut might help also
You’re chain tensioner is going to bend and break like that. Put it on the bottom of the chain so when you hit the gas it’s not putting force on it. I build stuff like this all the time so from one maker to another there is some good advice
*goes 3mph* "WOOOOH WOOOOOOOH OKAY ITS FAST ITS FAST"
Can you take some of the slop out of the chain with a half link?
You put the chain tensioner on the bottom because the force and direction the chain is moving wants to straighten out on the top half of the chain and the bottom half gets all the slack you would do it for both chains good work man just trying to help a bit have fun and keep building
When your pulling out the motor is lifting up .You should stiffing it up more that might have something to do with the chain popping
did you sync the carbs?
You should put the tensioner on the bottom of the chain because that’s where the slack is the top of the chain pulls tight when there is a load on it
It's your inlet manifold on each carb you've got a short and long inlet try and make them the same length
Right!!!
Hey why don't make gearshift on steering like on gokart? Whit 1000cc engine?
Definitely need a battery and bring it to the track to get a smooth ride and to ride out the gears!!!
2 more videos and he's done with the build series
Hey you gotta fix that engine mount. The engine moves a lot when you put it in gear
i noticed that every time you engage the clutch to move the whole engine rocks like the mounts broke
i live in finland and our wintter can be lower -30 celcius and still i have not got issues to start my bikes/mopeds if you tune your stuff right its start in every time
Nice carbs
You gotta get yourself some carb tuning equipment buddy. It will help you more than you can imagine. Especially with multiple carburetor set ups. You have to be able to know your mixtures in order to achieve maximum efficiency. A 1 or 3 bar wide band set up would be a inexpensive and accurate way to go. I run AEM in all my stuff they make an excellent wide band. Then your only issue is synching the carbs. It could be difficult with an older engine because youre dealing with wear and tear but honestly that thing sounds pretty stout i doubt youve lost too much compression. Remember, you should never tune a carburator at idle by ear, unless you have 20 years of experience and really really know your shit all youre doing is basically walking around in circles. This is the first video ive seen from you and im impressed, you remind me of myself at your age. An aspiring mechanic/fabricator need only worry about one thing, tools. If its a tool you constantly use (1/4 drive sockets, ratchet wrenches) spend the money and get snap on or mac or matco. If its something you dont use very often, harbor freight specials are just fine. Build your arsenal bud, ive never typed up a resume in my life, my tools are my resume. Every single good mechanic i know is the same exact way. Keep it up man, you have a really good future if you continue to listen and keep the mentality of a noob. Meaning never ever assume, always, ALWAYS confirm for a fact whatever procedure or specification youre dealing with. Then youll never blow up a $25,000 engine on the dyno because you thought you knew.
ooohhh i stalled