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Post by jackrides on Oct 3, 2023 11:22:33 GMT -5
Wrap copper tubing around intake pipe (flattened on contact side), brazed together if materials permit. Use small electric pump for coolant to radiator. Fan optional. Where is the carb/efi going to be?
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sinfull
Scoot Enthusiast
Posts: 413
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Post by sinfull on Oct 3, 2023 14:59:04 GMT -5
Other thing is the supercharger can be moved forward of the engine, like in front of the valve cover, just longer belt and charge tubes,
Internal oil so hopefully orientation is open. 3 drive possible location, either side of crank and maybe off of axle, axle would be interesting, zero off the line but built boost as speed increases like having a larger engine, power would not immediately hit but grow, sounds interesting actually
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Post by rollingbender on Oct 4, 2023 23:35:28 GMT -5
After studying this supercharger in particular and the whole world of superchargers in general, I think I will return this one. In its place, I believe I can make one that is more appropriately sized to the 139QMB platform.
In related news, I have resigned from my position at city government and to fill in the money gap whilst I figure out my next career move, I have been keeping busy by picking up some overflow work from a local machine/engineering shop. They are keeping me and my CNC machine busy making parts for them. While the machine is running and I am waiting to change out parts, I realized that I could copy this pump but scale it down to a manageable size and a more “scooter friendly” configuration.
The pump pictured previously is an AMR300. Stated specs are 300cc/rev and they say it is good for .5-1 liter motors. 50cc is .05 liters so it really is way too big for this application. I can make the cases and the impeller blades on my machine. I can design it around some standard off-the-shelf gears, pulley, bearings and seals and the shop I have been making parts for can turn the shafts for me.
Sounds easy enough, doughnut?🧐🤪
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sinfull
Scoot Enthusiast
Posts: 413
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Post by sinfull on Oct 5, 2023 2:12:11 GMT -5
I will volunteer for beta testing 😀
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Post by aeroxbud on Oct 5, 2023 2:54:33 GMT -5
If you just take the path of least resistance, and fit a V8 to the scoot. It will bolt right on.  |
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Post by rollingbender on Oct 22, 2023 0:30:29 GMT -5
I studied the math and design on the impeller lobes for about a month… it took me a half hour to draw it up and animate it!
The tolerance varies a wee bit depending on position but I have it within 0.01mm difference overall with an average gap of 0.07mm. I think I’m ok with this. We shall see what those tolerances do when it is machined, assembled and tested.
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Post by jackrides on Oct 23, 2023 17:23:48 GMT -5
How about an electric supercharger? Ryobi (HomeDepot) now has variable speed handheld 18 volt 'leafblowers'in at least 2 CFM sizes. Obviously the CFM is too high, but a chamber, after the blower, with a pressure relief valve like a single petal reed valve could moderate that. Mounting could be anywhere. The low price of the blower merits consideration.
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Post by rollingbender on Oct 24, 2023 13:31:39 GMT -5
Thinking of maybe using this bad boy as the platform for this build rather than the one I posted earlier. This one already has a title and it is the styling I am going for. I can basically remove the plastic panels one at a time and duplicate them in aluminum.    I’d change a few body lines here and there to accommodate lowering and stretching the seat but the basic skeleton is there. Plus… I believe the TNG engines are known to be a bit higher quality than most Asian scooters. |
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Post by rollingbender on Oct 24, 2023 23:17:33 GMT -5
So… what is this engine anyway? From all outward appearances, it looks like a standard 139QMB but it wears a different code.  Google has not been my friend on my quest for answers to this question. |
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Post by rollingbender on Oct 25, 2023 23:47:33 GMT -5
Did some playing around with the semi fenders… I rolled the cut edge a bit using my shrinking stump and English wheel. The aluminum that these fenders were made from is dead soft… wonderful and forgiving medium for learning the art of panel shaping. Now tell me this doesn’t look like a scooter front panel!!!  Also did some more CAD work on the super charger and I have ordered the stock for machining of the case and impellers. I took the measurements of my CAD drawing and made a styrofoam mock-up of the blower and set it on a sample 139QMB engine for reference. In the mock-up photos, I have used a 150cc carburetor because I figure that this is the size carburetor that would likely be used if I do not pony up the big bucks for an EFI system.   I’m liking how everything is fitting in the space available. It’s looking like a breather box will be able to be fabricated or modified so that everything will have a stock appearance. Still seeking knowledge regarding the TN’G engine code…  |
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Post by polypheides on Oct 27, 2023 0:59:19 GMT -5
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Post by rollingbender on Nov 9, 2023 21:42:35 GMT -5
A few weeks ago, completely out of thin air, I came up with a brilliant design feature to incorporate into this build. Today, while surfing the interweb for scooter porn, I stumbled across this…  Some jerk got into my head, stole my idea, traveled back in time and then built it. That was my idea, dammit!!! I’m extremely angry😡 |
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Post by rollingbender on Nov 23, 2023 15:45:55 GMT -5
I have the model all drawn. Now to make some chips!!!
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Post by rollingbender on Dec 7, 2023 18:06:36 GMT -5
New video detailing the supercharger design…
Please like, share and subscribe.
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Post by rollingbender on Dec 20, 2023 13:45:07 GMT -5
Part 2 of supercharger build rotors for the supercharger.  |
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