This might sound like a joke but how do I supercharge or turbo charge my bike

Well the most important thing to going faster is to install a hydraulic braking system. When it comes to going really fast, stopping becomes the top priority.
 
I suggest you get one of these. They're normally at least triple the price. I have one modified for my avenger.
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Hey @TYDYLWAVE1 what engine do you have? A little bit of port work would wake it up if you're comfortable with that. Porting, however, takes alot of time to understand. I fortunately have about 5 hours per day that I do nothing with at school and was able to research porting a ton. None of it really makes sense until you start doing it, but then it all hits you like a brick.
 
I like where your head is at but you are barking up the wrong tree: Crank case inducted two strokes are already supercharged
by the fundamental design. The crankshaft and fly wheel are a supercharger. You can't really shove more in with an external compressor. There are two stroke diesels, but again the supercharger is integral to the engine.

Two strokes are mechanically simple but very complex in design and engineering. You need to deal with constantly variable harmonics and pressure differentials based on rpm, pipe heat, engine heat, intake. There is a lot.

If you had a 4 stroke, it can be done but to my knowledge there are no easily available superchargers that will work for an engine small enough to fit on a motorized bike. If youre creative and have good fabrication and CAD skills you can adapt a small air compressor and use a "blow through" system but you will need to ensure the engine can handle the increased pressure without knock, or mechanical failure. Those both require some professional engineering skills or very deep pockets and a lot of time for building and testing.
 
cloakedvillain said:
I like where your head is at but you are barking up the wrong tree: Crank case inducted two strokes are already supercharged
by the fundamental design. The crankshaft and fly wheel are a supercharger. You can't really shove more in with an external compressor. There are two stroke diesels, but again the supercharger is integral to the engine.

Two strokes are mechanically simple but very complex in design and engineering. You need to deal with constantly variable harmonics and pressure differentials based on rpm, pipe heat, engine heat, intake. There is a lot.

If you had a 4 stroke, it can be done but to my knowledge there are no easily available superchargers that will work for an engine small enough to fit on a motorized bike. If youre creative and have good fabrication and CAD skills you can adapt a small air compressor and use a "blow through" system but you will need to ensure the engine can handle the increased pressure without knock, or mechanical failure. Those both require some professional engineering skills or very deep pockets and a lot of time for building and testing.
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yeah im pretty good with CAD but not a professional, I saw a 1/5th scale supercharger someone is selling and I also saw someone turbocharge their 2 stroke bike but again these also probably arent good.
 
TYDYLWAVE1 said:
yeah im pretty good with CAD but not a professional, I saw a 1/5th scale supercharger someone is selling and I also saw someone turbocharge their 2 stroke bike but again these also probably arent good.
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Don't get me wrong, hard and expensive are not reasons to stop, just make sure you know what you're getting into. I have a crazy build: 2hp 4 stroke, drive by wire, custom controls using an ebike torque sensor. It works well, but is heavy and ugly. While it cost less than an equivalent range ebike, it still cost a lot more than just using the throttle. But I wanted it, and I had the professional skills to build a working prototype. I have fun riding it and a had a lot of fun building it. It was good practice for mechanical design and coding.

Look into pneumatics and real figures on engine air flow. You need way more than you think, but still less than commercially available for automotive use. I have seen a turbocharged 53 cc huasheng, but only heavily modded at only getting real boost at very high rpm, 7-8k.

Build break fix did that build but he didn't document it very well. You have to scrounge around on his channel, and comments on like 10 different videos and shorts to get a rough idea of how he did it. Off the top of my head he had a lot trouble with boost over 10 psi causing catastrophic failure of the engine studs, he had to make a pneumatic diaphragm pump for get oil to the turbo, a lot of exhaust and intake work. Getting it to fit was a job and a half. I imagine it would work better with a 4hp lifan stationary engine, or 125 CT clone engine.

Tiny turbo: https://www.ebay.com/itm/354380678143

Look into custom pipes, and port work. AuMechanic has a lot of videos and a free calculator program to find good baseline dimensions for a custom pipe, and porting as well. Getting a good carb tune and your clutch adjusted will go a long way, but you're ultimately limited by the material and design of the original engine. The clutch can only really handle 5-6hp.

A stout frame, good brakes and a phantom 85 are the best I think you can economically get without being a welder or machinist. Past that and you are spending used 125cc money on something that is nowhere near as reliable or useful. Again, not a problem so long as you know that's what you want and you have the resources and willpower to do it.
 
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