30 Torque Converter Speed Gain Myth Mini Bike Drag Racing
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- Опубликовано: 8 сен 2024
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VEVOR Torque Converter, 30 Series
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As a long time RUclipsr it's always funny to me what video triggers the Keyboard warriors. Most people use a torque Converter with a MOD2 Cam or better. A rattlesnake is bellow a MOD2 in every way. But do to the duration better than stock. That means all the other videos are guys getting 800 more RPM than me easy LOL. Now on the driven pulley yes I can move the spring back to gain some top end and we might in the next video :) Have fun and thanks for watching!
The mod2 is a stock lift cam. The 252 has more lift. The only way I would get a mod2 is if I planned on using ratio rockers which isn't going to happen. I have Champion rockers on my three builds.
The CL series are very good stock lift economy cams. All of them can be run with stock valve springs. My mildest built 196 has a CL1 original. Nice cam for any mild build.
There's no myth about the torque converter. What you are experiencing is the difference in gearing. Here's an easy example. If I have a 100% stock Coleman 200 it's top speed with the jackshaft is around 20 mph. Now add nothing more than a cheap 30 series. The bike will now do 35 mph. The difference is gearing. The bike is faster with 4.5:1 (OD) gearing than it is with the 10:1 jackshaft gearing max governed to 3600 RPM.
I like the 6:1 gearing range with a torque converter. I use a yellow spring in the driven in the tightest hole to delay the belt shift under full throttle. This allows me to take advantage of the 4K RPM range instead of belt shifting at 3300 RPM or less with the stock gearing. You are using a 40 tooth and the stock driver which is not good for acceleration. The belt shift is happening at a much too low RPM. If you want to stay with a 40 tooth then get a Juggernaut driver.
When I started my quest to build the ultimate minibike I did a lot of research on mods. There is a lot of info out there to look up. I ran across a thread one evening where a member responded to a question that said simple you can not build a street, race, or trail out of one minibike. You have to choose which one to build and lean in that direction. This got me thinking about my build. The reason I wanted with the tav30 was this, I wanted to ride at low speeds when necessary, such as parades. A clutch's drawback is that at a sustained low speed it tends to burn up. This setup is much better suited for more open areas where you can get it stretched out. The tav30 is better suited for offroad/street applications, in my opinion, as it is practically an automatic transmission. This makes offroading and street use a blast. I believe after that it is pretty much up to the person building the minibike. With this awesome build, congratulations.
Thank you John for doing the camera work and the pit crew thank you for some awesome racing
IDC about what YT says. I work on every type of mechanical vehicle in racing from land to air to sea... I think GEARING is your answer. Your rear sprocket is pretty small. Go up from 40T which I think you mentioned, try something close to 60T... My 212 runs with the vevor and JUGGERNAUT with a 62T rear. I get close to 60mph within an 1/8th mile. And the 212 is just a header, intake and jet. I don't know what the bike will top out at because its completely rigid and over 55mph feels darty and unsafe. Rear sprockets are cheap.
That doesn't sound right. On how tall of a tire?
you need to tune the converter, it's locking up too soon, if you were turning 6k before the converter install but can only hit 4k after converter install than obviously the converter is what's holding it back
i have the same vevor tc and the issue with knock offs is they're hit or miss on the spring strength for the driver and driven pulleys that's why some people will have a big gain in top speed and some wont. you can change the stiffness of the driven spring by changing what hole it goes in or you can get springs from comet and they'll fit in yours and depending on what color you get will determine what stiffness the spring will be. i have a Baja worrior with a stock 212 hemi with the governor and the same vevor tc with a 60T rear sprocket and i got lucky on my tc because my bike moves.
Yah been reading up on this. If the holes are at the top the front is torque the rear is top speed. It's a changeable thing on the bike without much effort so we might do a few engine upgrades then track change it to see a difference. Seems they make a Yellow for top speed but the reviews are fan boyish at best unless your engine is well built.
You have to adjust the driven torque converter also you're only going to get so far with a stock torque converter you usually have to upgrade to a juggernaut to give you more RPMs with a torque converter
Couldn't tell if the rear pulley was getting smaller when it needed too could change the rear springs slot and the color of spring they are very adjustable same with the stall but you do loose and or gain some topend speed same as a clutch setup. Personally don't think the tq converter is faster then a 2 or 3 disc clutch. For a 6000 rpm engine it's considerable with a stock rod. More time consuming trying to get the things set up right for what distance you run. A clutch definitely kicks in better at the desired rpm then a torque converter. Torque converters usually rob power up top hence the reason they stop roughly at 6,000 rpm and doesn't gain anymore. With these little engines every 1/10 of a hp is a must. Personally wouldn't of used the torque converter. Yet you are showing the know it alls that a torque converter is really only good for hills and not drag racing. Very interesting video series!!!
What "know it alls" are you talking about? No know it all is drag racing with 4:1 gearing against a 19" tall tire with a torque converter and an 8 HP small block. The guy in the video is just starting out at a certain level of racing.
Torque converter don't like 40 tooth sprocket. I run a ghost with torque converter and factory rear sprocket and almost doing 60 with 200 lbs rider
This has been one of my debates. I have a 50 tooth we might put on to see if that changes it.
with a cam, arent you supposed to switch up to a juggernaut driver. So you dont get limitied to around 4000 rpm range?
He's only running a rattlesnake 252 cam not enough to worry about a juggernaut. I'm running a 292 with a tav2 9200rpm around 83mph an no juggernaut
@@MarkLoomis-y7o This was my understanding as well. I have one but see no reason to run it unless I start eating belts or clear 8k.
I think it’s time for a nitrous kit
How do you like those tires?
Love them. I ride the bike on gravel to get my mail 3 times a week. But will say they are worthless in sand or mud.
I wanna know wtf is wrong with your motor because my 212 with the clutch flip, a homemade header and a air filter made out of a mayo jar did 55.
Tire size was 20x8x8 gear ratio was 4.8:1 and im 238 pounds.
Also you could just cut the tabs off the jackshaft backing plate and swap the jackshaft and bearings from the tc plate into it and not have to lift the engine
You should do a amr supercharger on something