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Post by skuttadawg on Oct 25, 2013 0:08:22 GMT -5
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Post by prodigit on Oct 25, 2013 2:26:55 GMT -5
Way too insane!
A turbo on a 50cc would be awesome, but not on a bike.
A 50cc 4 stroke would already be too fast on a bicycle.
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Post by sailracer on Oct 25, 2013 4:12:49 GMT -5
Yeah THats ok, but did anybody else see the 11 brand new 1975 norton commandos still in crates unassembled?Now thats a find!(on the right under populsr posts about 1/4 of the way down the pagee)
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Post by Deleted on Oct 25, 2013 9:17:24 GMT -5
This thread is useless without video!  Who knows if it even runs? |
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Post by wheelbender6 on Nov 3, 2013 20:37:34 GMT -5
I like the dashboard he attached to the BMX bars. Very clever. I rode a motorized bicycle for 5 years and had a great time. I sold the motorized bike this year and built an e-bike. The e-bike is better suited for commuting to my current job.
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Post by rockynv on Nov 4, 2013 4:44:33 GMT -5
The posted 2 different bikes with the black one seeming to have the a-frame bar removed. Wouldn'y want a 167cc turbo powering that frame especially with bicycle brakes.
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Post by prodigit on Nov 4, 2013 13:07:49 GMT -5
A bicycle would work well with a 33cc 4 stroke + turbo.
A 49cc scooter would work wonderful with a turbo. It could actually make the thing useful in traffic.
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Post by sailracer on Nov 4, 2013 17:34:51 GMT -5
I find it hard to beleive that ANY small displacement engine(less than 250cc) would have the power required to spool-up a turbo in the short length of time required for it to make any appreciable difference in a short race.
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Post by prodigit on Nov 4, 2013 18:44:14 GMT -5
It does, there are turbo's made especially for 50cc engines.  They're quite expensive, but they're good enough to spool up a small turbo. Also, as a turbo spools up, it generates compression, and that compression causes even more exhaust pressure; causing the turbo to spool up even more. |
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Post by sailracer on Nov 4, 2013 19:14:05 GMT -5
Maybe in a long run, but I doubt it in the 1/8 or even 1/4 mile.Turbos are notorious for lag time
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Post by prodigit on Nov 4, 2013 21:40:59 GMT -5
On small turbo's there is no real big lag. On larger turbo's a lot of the lag has to do with the fact that the engine makes lowest torque at lowest RPM. At those low RPMs, the turbo causes drag by kinda blocking the exhaust somewhat, while not giving enough air on the intake.
This is compensated by an exhaust and intake bypass.
An exhaust bypass that allows low amounts of air to bypass the turbo, without the turbo spooling up, causing very little drag from the turbo at low RPM. At higher RPM, the amount of air is too much to go through the bypass, and the turbo gets spooled up.
At the intake, there's also a bypass, with a valve.
That way you can have performance and efficiency of almost that of the NA engine without turbo, at lower RPMS; while still having the power of a turbo at higher RPMs.
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Post by rockynv on Nov 5, 2013 4:49:34 GMT -5
Maybe in a long run, but I doubt it in the 1/8 or even 1/4 mile.Turbos are notorious for lag time The lag would only be in the first second or two by three it would be spooling pretty good. You got to use the correct size and take the time to set it ip right. 1/8 mile on a scooter is what a 15 to 20 second run so the turbo would be there for most of it. |
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