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- เผยแพร่เมื่อ 29 ก.ย. 2024
- When you run a 3-foot-long intake manifold on your minibike
Tested a 3-foot long intake manifold on the Tillotson 212 powered Doodlebug minibike to see if the bike would be any faster with the long intake manifold. Used a 24 MM flat slide carburetor for the test.
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I've literally been waiting watching aaallllll day for this!!!!
LOL Right on!!
@@Black66 I've said it before and stand by it still. This is the best small motor tinker channel of them ALL!! You do more serious work AND fun stuff than the other heavily sponsored channels
@@SDS-1 Thanks man, I appreciate it.
@@Black66 thank YOU Mr.66
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Man, you almost doubled your fuel capacity with that fuel line
LOL yes it did !
Ha, an old Nascar Trick
@@speedfreak8200 Ya'll only restricted the fuel tank capacity, nothing in the rules says I can't run 11' of 2" fuel line. -Smokey Yunick
Insert Days of Thunder tones Harry Hogge : I'm gonna give you an engine low to the ground... extra thick oil pan to cut the wind from underneath you. It'll give you thirty or forty more horsepower. I'm gonna give you a fuel line that'll hold an extra gallon of gas.
Love these videos!
You need to connect the exhaust to the intake. That is how turbochargers work so that will make it very fast.
Check out the new video coming out on Saturday.
I'm only 3 minutes into your video and, personally, increasing exhaust back pressure (BP), and increasing intake restriction will hurt your HP. The expert must have meant every foot will decrease, not increase. But, let's continue. Exhaust is way more complex than I originally thought. True, you want to reduce or eliminate BP but if thats all, use a big diameter pipe. But, that won't work. The right diameter and length exhaust pipe will actually create a vacuum clearing out waste gases from the cylinder. That's if I'm understanding this topic.
What about running an intake facing forward with a wide mouth to catch lots of air and funneling it down? Ram-air?
Put the tube before the carb to let the air ram through the carb vs trying to keep the air fuel charge suspended
I know straight is optimal, but for the massive amounts of hp gain, perhaps a few gentle bends? 🤔 if it fit and didn't cause so much drag.....
This guy lol too dumb
Isn't that the way it is now 🤔
@speed freak no, he has the carb at the far end of the tube... meaning the entire fuel charge needs to stay suspended...by putting it the other way he can possible utilize the intake ad a hermholtz resonator and get a better charge
The decrease in performance was obviously due to the weight of all the zip ties lol. Im actually surprised it ran as well as it did, particularly at low RPM considering the fact that fuel tends to drop out of the air flowing through an intakeover a longer distance.
That is too funny he's dead serious tho thanks for having a sense of humor not like some of these mighty sand crabzzz
The only intake I seen that they claim go gains is the mini bike badass that puts the carburetor on top of the fan shroud with the inlet facing forward,the faster you go the more ram air effect it has! But this deserves 2 thumbs up
Now I'm excited for the upcoming big block Chevy testing.
Definitely love to see a ram air set up! Dual plug cylinder head sounds awesome as well!
A forward facing ram air trumpet for the intake would be cool, also I wonder if running a tiny intercooler on the intake side would do anything. Probably not.
Oh that's simple 😃Pour liquid nitrogen on the pipe while making a pass to cool the intake charge.
Very cool , but i would love to see you do a intake with the tornado type air filter that they did on small block Chevy engines ten years ago. They supposedly made more HP and MPH. Just a thought! Really love your channel and ideas you come up with.✌😎🇺🇸
It might actually do something to because it's carbureted
The long tube in the airstream offset the performance gains you expected. Additionally, the drag was asymmetric so you would be continuously turning to correct, causing further power loss. Try a ram intake that is at or near the centerline of the bike, before the carb.
Ram video coming on Saturday.
Now you gotta run both at the same time.... Lol
What kills me the most is having that fuel cut-off that far from the carb
Holy COW……WHAT IS THAT? FIRST MINIBIKE I HAVE SEEN TAKE AN ENTIRE LANE WIDTH ALMOST.
Love it ! Cleanest cable and fuel line routing ever . Can't stop laughing
Before I'd go machining the head for another spark plug, I'd figure out a way to put an accelerator pump near the engine to clear up that 0 to 5 mph lull while the engine is waiting for the "jump to light speed" that is quite clear in the first 0 to 30 run.
Use a push pull throttle and make push cable release a spring loaded (jet-able) accelerator pump. Fine tuning will be required.
Should bring you into the 3.0's so hold on with both hands. ;)
I think the low end lag is the time it takes the small engine to draw a vacuum on that long intake pipe. He could put a 90 deg, forward facing with a scoop to help or maybe a 90 deg up so the charge falls towards the engine. Got to get the fuel/air charge to the engine faster at low rpm. Maybe a smaller diameter pipe too that's a big intake. Like you said it probly needs more fuel on takeoff too.
@@williamrosenow6176 At idle before the run, the entire length of the manifold has the maximum vacuum the engine can produce, but the lowest velocity it can produce.
When the throttle is slammed wide open the engine will get a massive gulp of air (with idle richness fuel already mixed in) but then the manifold has almost no vacuum, but atmospheric pressure helping to fill the void while the engine is waiting for the now open main jet's fuel rich mixture to finally reach the combustion chamber.
Notable improvements would result from fattening the idle richness until it was on the verge of fouling the plug, but who wants to sit on a minibike in a black cloud of poisonous gas? Not to mention when all your buddies go rippin off and you stall just as you hit the gas.
That being said, a tiny squirt of fuel just as you dump that massive gulp of air into the cylinder would be just the ticket unless you are holding a camera in one hand ... The bike will leave but you will not.
Another good option would be a vacuum operated carb that will maintain intake velocity for you even if you slam the throttle plate WFO.
They have an accelerator pump as well.
No no no. What you need is a couple jegs and summit stickers on there. 😂 Hey what was that minne bike expert doing with a chop saw in his hand? He's not divulging all his secrets.
Can only make left turns, but hey power is power!
"the long tube will cool the intake charge" lmao you're a savage bro. A+ for this science backed trolling. Reminds me of all the exhaust back pressure arguments that used to float around the forums back in the day.
Oh thank God. I'm new here and I thought homie was being serious. Absurdity aside the claims of gaining 10hp off of what I can only assume is a 6hp motor had me all like O_o.
On the bright side it’ll take you 15 minutes to realize that you ran out of fuel.
I don’t even know how you come up with all these ideas it’s looking good though
I had an exhaust pipe my friend Aric an I made that was about 24" long, I named it EVEN-FLOW. I used it on my Baja Viper with a 212cc Predator.
I heard you can use a smog pump as a supercharger for these small engines.
You need to taper the intake down, to increase fuel velocity, before you double plug it.
Been waiting since the last vid dang boss that mini bike expert he is one smart fella
9:51 Close Captions think intake sound is Foreign Language
I know its a piss take for entertainment purposes... but dont try fitting a another spark plug. raise the compression ratio to 13:1 instead, and go back to the GPS manifold and put a long forward facing snorkel on it with a massive funnel on the end and RAM that air in there (very high compression ratio and positive air pressure, what could go wrong?)
without a gear change not sure what you expected? max rpm is max rpm more power wont increase speed without more rpm....change the rear sprocket to a smaller tooth count....
Check out this video on minibike gear ratio! th-cam.com/video/xV8i59aGUao/w-d-xo.html
One of my favorite channels . Thumbs up for science
Actually betting that a 10-12 inch long smaller-diameter intake tube would increase bottom end torque and drop 0-30 times without dramatically hurting the top speed. The old Chrysler long ram 413 achieved over 100% volumetric efficiency naturally aspirated at low RPMs by creating a "ram" effect in a narrow RPM window, and many modern engines employ that tech.
Volume all but gone. Otherwise a good video. It may be You tube that's doing it. I've noticed the last 3 months that video volumes are very very low. My equipment works fine. P.S. I would run the intake along the froma and up the rear of the bike so you can effectively lean your bike in turning.
0:28 the length of the exhaust tubing will change the pulse width of the exhaust charge exiting the pipe to achieve a boost in power/smoothness response at a SPECIFIC RPM called ( coming on the pipe ) commonly used to describe 2 strokes engines powerband where pulse width it is more dynamic and more commonly optimized, LONGER = lower rpm & SHORTER = higher rpm,
god dang, send that shet!!! got my own build and its been fun I just need the money and time for it haha
Dude, love your humor crackin up over here
Awesome application of pseudoscience! Everybody knows the best way to add horse power is by simply adding decals. LOL More please!
I say you need to redo it all because you gotta gear higher. The exhaust video you were Tapped out limiter. But this video it seems you lost higher speed, you didn't tap it out. That intake really didn't do justice at all. Just real goofy looking and fire hazardous 🤣
Mind hump for you. My minivan has has a factory 4-5’ of intake 🤣 (Toyota previa). Mid engine but the air box is under the hood…
Well...at least it makes wrapping your bike around a telephone pole wayyyyyyyy easier.
I'm upset. The exhaust is shorter than the original test...
🤣🤣🤣This was too funny....It's like Bubba J on Jeff Dunham, you can only make a left turn! 🤣🤣🤣 Glad to see you are having fun and still testing at the same time! Good video, can't wait to see what's next! BTW...I like that mini bike expert. 😘
Hell you might as well Add a Side car on your bike that your Intake can slide Through it Somewhere not in the way ???
Could you not Bend your intake pipe for a Less Danger of Whacking something with it ?
I'm surprised you can ride local Street with police problems testing minibike
I just love it when good people do this stuff! For what it’s worth man, I think it’s awesome!👍
Spool it and add some fins to dissipate heat. Might become a cold air intake. New idea = RICH!
What if you coiled the exhaust and intake and maby made them bigger ,then they wouldnt stick out as much? Just a thought
I think the resonance of a 3 foot intake on that motor would favour around 2300 rpm
What if you cut little hole all along the last foot of intake and wrapped carbon felt around it. And just put a small air filter on the end?
Fabricate a duct from your fan shroud that you hook to your carb to force air through from the fan. Be like a super charger..
That long intake should theoretically help torque, which might help you on the hills.
I used to love my minibike. I built it from scratch. I registered it for road use too.
Not noticing a sign pole on side of the road makes it turn HARD right ( wing..😂)
Does it have to be straight,or could it be a hey Carl hey Carl could it be in a how about a curl shape
😅😅😅😂😂😂 this shit is too good stage 147 Optimus idiot GPS special 😂
I think you should try the intake strait shot to the head and put a bolt in the end of the exaust to help with harmonic reversion
How I wish it had gears and you could shift it would be an awesome rap Tilla
Hell bub you go to the right in a corner you will rip the carb off. But its different
Can't find x18 wheels nowhere because u got them all😂
A little rough in City traffic you think.... AIN'T IT JUST AIN'T IT 😜 lols..... Brother that baling wire got you a SUBSCRIPTION..... I love it prototypes are never Sexy... What is that carburetor Type....😎 Watch out for tumble weed cacti and sharp turns..... needs a slight bend up and back .... too modify the prototype.....Oh also watch for dogs and stray animals....
Thanks! Check out the video on Saturday. New prototype. Easier on animals lol
I'm surprised that it even turned on, we'll see what's next.
When the intake valve closes it makes a bounce back, Honda would measure the area and shorten the intake or ?
I love this “series”
Copper exhaust pipe makes green flames and 25% more power.
Put a turbo charger on it and you'll gain tons of hprse power.
Now put a " Spiral " inside the tube to aid vaporization of the fuel.....the spin helps drop the vacuum lever....would be another fun simple test.....bx cable casing might work ! ..cheers : )
Check out the video on Saturday.
Subscribed 👍
maybe the intake was too long looked like it was a foot longer then the exhaust
interesting longer intake(to a point) should give more torque not as much Hp. Top speed would need to adjust gearing because rpm would be your limiting factor. I always thought length on an exhaust would not be a factor on a 4 stroke. 2 stroke different story with sound waves... Anyways keep testing
I have a new video coming out on running the long exhaust and long intake.
Maybe try smaller diameter to keep the velocity up
The top speed is generated from pulley sizes,right?
Does your throttle stick? Just curious on your super dramatic wrist flick forward thingy you're always doing? Who makes your throttle?
The throttle on the long intake is two cables put together . It's not the most responsive throttle setup. I try and be as consistent as possible when doing 0 to 30 testing . This is why I turn the throttle on and off as quickly as possible the same way every time . To get the most consistent results.
I wonder what the drag coefficient is on that intake with all the junk on it and sticking way out there. Try a trumpet end on the exhaust to help scavenge and curve the intake tube around the back and come back up front with it. Put a funnel stack on the carb to force more air in. After you get the results from that, install a blower driven by the chain at 10% overdrive. If you still have a running machine after all that, I can come up with more ideas, like nitrous.😅
Here is the video on the RAM AIR intake, th-cam.com/video/9KE9e-3KHrU/w-d-xo.html
Check the carb and verify Full Throttle opening when you have Full Throttle on the twist grip.
Oh you forgot to put the earth magnets on the fuel line 😂😂😂
You CAN TRY WITH THE CARB ON A INTAKE THAT IS ANGLED 35 DEGREE UP WARD BEND SAY WITH 1/2 THE LENGTH MOUNNT CARB AND THE OTHER 1/2 STRAIT UP WITH A 45 DEGREE AIR INLET FACING THE FOWERD INCOMING AIR CHARGE ADJUST A FUNNEL OPENING TO CACH HIT OR MISS WHAT SIZE WILL BE APTIMULL HOTTER IGNITION COIL LARGER GAP 40.THOU.
Check out the video coming out this Saturday. Ram air set up.
prolly Had to refuel twice before gas got to the carb 😭
Would it make difference if intake is coiled and pvc pipe?
That's gonna take a hot minute for that gas to reach the engine and
better have plenty of gas ..you shouldn't have your throttle cable twisted up like that ..
I guess you do have it a little bit loose
It actually runs surprisingly good! Check out the other videos with the 7-foot exhaust and the 3-foot intake running separately!
Bravo.....I though it was a weed wacker .....cheers
You should wrap that pipe around your ankles my bad I mean the frame be safe remember your helmet gloves boots bubble wrap like in Empire starts back bubble wrap on a spacesuit
I will ask the minibike expert about this...
I'd try running the intake pipe vertically as there is less chance of the fuel falling out of suspension. Use a smaller diameter pipe to keep the air velocity up and maybe rejet the carb.
Check out the video on Saturday .
My vote is for forced induction and nitromethane.
tuck your knees and arms in and tuck your head on take off
Sooo......... get this..... you should try sending the intake thru the middle of the exhaust. Have it y out at both ends but have the intake tube inside the exhaust tube!!
But make sure that the carb has at least 3-4" run before it enters the exhaust pipe
Looks like the offspring of a mini bike and crop duster! How about a leaf blower forced induction??
Great idea! Ram air video coming out on Saturday.
Hook him up with the , " Dumb n Dumber ", dudes !
Knowing what I know about thermodynamics I would suggest preheating the exhaust with a bronze ematic
drag coefficient saps 9-12hp
All I’m seeing is a huge pipe that laughing gas can go into
Must be losing that +10 hp with wind drag.
man tou could cook about ten hot dogs at a time!! sweet!!
Could you not make the intake pipe into a smooth S shape so it could run parallel to the frame? Would be considerably more practical.
Ram air video coming out on Saturday
So why not put a u bend in the intake so the carb comes out between the forks and through a velocity stack for a little ram induction?🤔
Ram air intake video coming out on Saturday
now measure the gas milage at lets' say 40 mph ! : )
You can expect to double your hp if you point your intake and carb forward like a ram air joust.
You need to add fuel to compensate for the ridiculously long intake runner it's probably running a touch to lean
Yes! Good point. Check out the video this Saturday
. I use a different intake on it.
a spiral tube up to 5 feet might do even better ! : )
You need a training wheel on that carb. How long did you have to crank it before it started?LOL
Great idea! It took quite a few pulls. Once it started the first time it was ok...
Looks like some air o dine negatives that way