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lt1silverhawk 12-21-2011 12:36 PM

Got Smoked
 
1 Attachment(s)
Well, it finally happened.


Got smoked on the way to work today. :mad:


Aside from occasional stop sign to stop sign runs, I don't race much.


Today was different. I was running late to work. (Except I was biking.)


I was biking to work on my beach cruiser, pedaling for all I was wroth in 46 degree weather (which is like hell freezing over by SoCal standards :pain: ). This dude sneaks up behind me on his mountain bike flies past me as if I was standing still. :confused:


Canít even say he had a weight advantage since he had a bigger backpack than me. And he was pedaling oh so casually, thanks to his 20+ gears versus my only one. Man, those overdrive gears do deliver on the efficiency as well as top end speed. He was wearing shorts, which may have given him an advantage in drag. :boxing:


So now, I either buy a more performance-oriented bike. Or its time for some mods. :evil:


My bike is mostly stock, aside from an after-market cable lock and the lowered seat. Clean title, of course. Complete factory foot-injection. Very low miles. :thumbup:


Iíd like to covert my bike to gas, but itís not legal in California due to smog. Yet ironically its not against the law for me to have as many beans I want in order to have enough protein power for my ride and possibly destroy some nose hairs in the process. And Iím sure Iíll get called a cheater from the competition for not being ďall pedalsĒ. :rolleyes:


I suppose I could hide a can of Redbull in my backpack and rig a hose from which I can take a hit when needed. I'll be damned if that doesn't help top end. :evil:


I may have to consider weight reduction, but that can take some time, especially during the holiday season when I temporarily suffer from egg-nog addiction. I suppose wearing only one jacket and ankle-high socks from now on will help some.


Iíd like to get a rear-view mirror to avoid any more sneak-ups, but Iím concerned about its effect on drag.


I think Iím maxed out on the wheel size. At 26 ď. Presently running 30 psi of local atmosphere air (cold tires) for optimal launches. Traction is no issue.


I havenít lubed the chain and sprockets, rotated the tires, nor have I done a tune on it, so that might be an issue.


Can I run a sprocket of a large diameter, while maintaining the same lung capacity I have now, and getaway with it? Maybe a double-roller chain for reduced friction? That should see some gains, I would think... Perhaps drop my ET in the 1/8th mile and bump up the trap speed a bit?


Definitely open to suggestions.



http://www.hotrodders.com/forum/atta...id=60975&stc=1

matts37chev 12-21-2011 02:52 PM

more HORSEPOWER, that fixes everything :thumbup:


if I remember correctly, on that model (and some others) if you run it at full throttle all the time, from now on
the horsepower will slowly start to increase (along with some minor weight reduction) :mwink:

cobalt327 12-21-2011 06:39 PM

There was a long-standing bicycle land speed record held by a doctor, who rode his 1-speed bicycle (the front sprocket was HUGE) behind a hot rod PU truck w/a big wind break strapped to it. He eventually did nearly 140 MPH. He was shown at speed wearing what looked like a cross between a wet suit and a speed skater's outfit in a Hot Rod mag (might have been a yearbook).

He's mentioned in passing HERE, where the record was broken by a newfangled bike.

OLNOLAN 12-21-2011 08:19 PM

ha ha ha har har cough spit
 
Thats about the funniest chit I heard today! Put a two stroke engine on it. 100 mpg or pedal when you run out of gas. There is a guy around here that runs one to the store every day, hauling anus. :thumbup: Nolan

deckofficer 12-21-2011 09:03 PM

Sounds like it is time for a hub motor. There are a lot to choose from, cheap China build to quality USA build. 250 watts to over 3000 watts.

http://www.electricrider.com/crystalyte/

Bob

NamelessJoe 12-21-2011 09:03 PM

maybe you could go electric or look into the 2 stroke front wheel hub motors that run on gas in a bottle holder? you might find something Cali legal?.... or get a 3 speed rear wheel it just has a little toggle thingy that will strap to your handle bar

matt167 12-21-2011 09:24 PM

Theres a guy on Venice beach that builds gas powered beach cruisers with the china engines. They fall thru the cracks. not legal but the engines can be had from a few of the suppliers for california market..


I have a 66cc on a Mountain bike. rode it like it was a dirt bike down in some trails. the straight plug head had developed leaky plug threads and I bought a new cylinder and ported it, and bought the slant head for higher compression. it's still in peices tho

matts37chev 12-21-2011 09:30 PM

or you could start pooling to work, it'll be a little faster :thumbup:

cal1320 12-22-2011 08:02 AM

http://www.hotrodders.com/forum/atta...id=60975&stc=1[/QUOTE]


Invert the handle bars. This will give you a lower profile in the wind.
Loose the front reflector. It's like a billboard. Too much drag.
Mill the thickness down on the pedals. Drag and weight reduction.
Remove reflectors from spokes. This is a *****in blacked out dangerous ride (save the reflectors for some Nancy boy or a peroid correct restoration).
Add a playing card to hit the spokes. I would suggest a face card. Just the noise alone is worth a tenth in the quarter. Vintage wood clothes pins are faster than the new plastic ones.


Oh wait. I just noticed the seat....... uhhh you aint goin nowhere fast if you need a seat that big. :thumbup:

boatbob2 12-22-2011 11:38 AM

Speed.......
 
Buy a HONDA motorcycle,then you wont have to worry about getting passed by a bicycle !!!!!!!!!!!!!

lt1silverhawk 12-22-2011 12:56 PM

First off, my apologies for not posting this under Off Topic like I meant to do. The trauma of losing a race, ya know... :D




Hay Matt,
Quote:

Originally Posted by matts37chev
more HORSEPOWER, that fixes everything :thumbup:


if I remember correctly, on that model (and some others) if you run it at full throttle all the time, from now on
the horsepower will slowly start to increase (along with some minor weight reduction) :mwink:

Well, running at full-throttle from the beginning might've been my problem. I was out of breath and strength pretty quick. :( But I suppose practice does make perfect, and should help improve the power-to-weight ratio in the long run.

Quote:

Originally Posted by matts37chev
or you could start pooling to work, it'll be a little faster :thumbup:

Lol! I'd be in serious trouble if my pooler called in sick!




Hey Cobalt,
Quote:

Originally Posted by cobalt327
There was a long-standing bicycle land speed record held by a doctor, who rode his 1-speed bicycle (the front sprocket was HUGE) behind a hot rod PU truck w/a big wind break strapped to it. He eventually did nearly 140 MPH. He was shown at speed wearing what looked like a cross between a wet suit and a speed skater's outfit in a Hot Rod mag (might have been a yearbook).

He's mentioned in passing HERE, where the record was broken by a newfangled bike.

That was actually a very interesting read. And yes, that sprocket is very large, helps to attain faster speeds with less pedaling I suppose. 140 mph? I can't even imagine that.




Hey Nolan,
Quote:

Originally Posted by OLNOLAN
Thats about the funniest chit I heard today! Put a two stroke engine on it. 100 mpg or pedal when you run out of gas. There is a guy around here that runs one to the store every day, hauling anus. :thumbup: Nolan

Shoot, if I had my way, there'd be a miniature LT1 on it! :P :thumbup: Some of these gas conversion kits I've seen are rated at 40+ mph, so I'm sure it feels fast on a bike. 100 mpg is always a nice bonus.




Hey Bob,
Quote:

Originally Posted by deckofficer
Sounds like it is time for a hub motor. There are a lot to choose from, cheap China build to quality USA build. 250 watts to over 3000 watts.

http://www.electricrider.com/crystalyte/

Bob

Good recommendation, as I did not know these existed. I went to the link you posted and thought the pricing on those units was a bit much. however, I did do a search on Amazon and eBay and they've got much cheaper units for sale. I am quite interested in such an upgrade now, and I would like something similar to the Currie Technologies Power Kit. Its the only complete kit I've found that includes the battery. Top speed of 10 - 15 mph with normal pedaling and max range of 10 -15 miles. $300 isn't too bad. However, the battery is rated at only 200 cycles. Another one that seems decent is Electric Bicycle Conversion Kit SLA.




Hey Joe,
Quote:

Originally Posted by NamelessJoe
maybe you could go electric or look into the 2 stroke front wheel hub motors that run on gas in a bottle holder? you might find something Cali legal?.... or get a 3 speed rear wheel it just has a little toggle thingy that will strap to your handle bar

Using the water bottle as the gas tank? Now that's genius! :thumbup: :evil: I did look up the three-speed rear wheel conversion kit and found only one: Shimano Nexus 3 speed Rear Wheel w/ Coaster Brake 26". I thought it was a bit pricey, a little more than buying another bike.




Hey Matt,
Quote:

Originally Posted by matt167
Theres a guy on Venice beach that builds gas powered beach cruisers with the china engines. They fall thru the cracks. not legal but the engines can be had from a few of the suppliers for california market..

Wow, you know more about my area than me lol! May have to head over to Venice one of these days, visit Muscle Beach, may be a few bike shops. :D

Quote:

Originally Posted by matt167
I have a 66cc on a Mountain bike. rode it like it was a dirt bike down in some trails. the straight plug head had developed leaky plug threads and I bought a new cylinder and ported it, and bought the slant head for higher compression. it's still in peices tho

Dude, you moded your bike motor? Sweet! Put up some pics if you got any.




Hey Cal,
Quote:

Originally Posted by cal1320
Invert the handle bars. This will give you a lower profile in the wind.
Loose the front reflector. It's like a billboard. Too much drag.
Mill the thickness down on the pedals. Drag and weight reduction.
Remove reflectors from spokes. This is a *****in blacked out dangerous ride (save the reflectors for some Nancy boy or a peroid correct restoration).
Add a playing card to hit the spokes. I would suggest a face card. Just the noise alone is worth a tenth in the quarter. Vintage wood clothes pins are faster than the new plastic ones.

You've done this before, havent' you? :evil:

Quote:

Originally Posted by cal1320
Oh wait. I just noticed the seat....... uhhh you aint goin nowhere fast if you need a seat that big. :thumbup:

Hey now, I told you about my egg-nog addiction! :boxing: . To be fair, that is the only factory option for the "interior". After all, it is a big comfy cruiser so its supposed to be that big. :D




Hey Bob,
Quote:

Originally Posted by boatbob2
Buy a HONDA motorcycle,then you wont have to worry about getting passed by a bicycle !!!!!!!!!!!!!

I seriously have been thinking about getting into motorcycles. I unfortunately fell off of one during a simple part of the test at the end of the riding class. Hurt my wrist and never touch a motorcycle again. My commute has been reduced greatly recently so I am again considering buying an older motorcycle. Hopefully insurance isn't too much.




Thanks guys for the laughs and quite a bit of new knowledge. This conversation actually might lead me to a new project!

deckofficer 12-22-2011 02:59 PM

Like I said, there are a lot of hub motors out there. Just remember 746 watts = 1 hp, and P=IxE. Lithium batteries are coming down in price, and unlike the 300 cycles you get from a deep cycle lead acid battery, they will give you 2000+ cycles plus for any given energy storage, are 1/4 of the weight. Some controllers offer regen if you want to stretch your riding range. Don't get crazy like I did, this scooter will out accelerate my Corvette to 40 mph, and if it was a bull in the rodeo, would have a perfect record, 5 riders tried it, 5 wound up on their butts.

Bob

http://i1236.photobucket.com/albums/..._21200x900.jpg

A 500 lb battery trailer being towed by the scooter.
http://i1236.photobucket.com/albums/...green/605d.jpg

http://i1236.photobucket.com/albums/...021200x900.jpg

nine4gmc 12-22-2011 03:21 PM

this thread went from one of the funniest posts I have read, to the fastest electric scooter I have ever seen in 1 page, WIN!

deckofficer 12-22-2011 03:39 PM

The controller in those pictures was only a 400 amp rated for 1 minute. Unlike gas and diesel engines, electric motors are capable of a huge peak output for 5 seconds. The Etek PMDC motor I'm using is only rated at 5 hp continuous, 15 hp for 1 minute, and for 5 seconds, what ever your controller and battery can muster. Since the AGM batteries can crank at 680 amps for 10 seconds, it was time to upgrade to a 700 amp controller. I'm still at 48 volts, but could push to 72 volts. At 48 volts X 700 amps = 33,600 watts / 746 = 45 hp for 5 seconds. You have to remember that on an electric motor, all torque is available at zero rpm, that is why even with a thorough pre-flight, everyone that tried to ride it lost control. At 72 volts (if I upgrade) it would be 72 X 700 = 50,400 watts / 746 = 67.5 hp on a scooter that weighs 113 lbs.

lt1silverhawk 12-22-2011 10:05 PM

Quote:

Originally Posted by nine4gmc
this thread went from one of the funniest posts I have read, to the fastest electric scooter I have ever seen in 1 page, WIN!

That's the beauty of this forum and its members! :thumbup: Lots of humor and lots of knowledge!




Quote:

Originally Posted by deckofficer
Like I said, there are a lot of hub motors out there. Just remember 746 watts = 1 hp, and P=IxE. Lithium batteries are coming down in price, and unlike the 300 cycles you get from a deep cycle lead acid battery, they will give you 2000+ cycles plus for any given energy storage, are 1/4 of the weight. Some controllers offer regen if you want to stretch your riding range. Don't get crazy like I did, this scooter will out accelerate my Corvette to 40 mph, and if it was a bull in the rodeo, would have a perfect record, 5 riders tried it, 5 wound up on their butts.

Bob

Quote:

Originally Posted by deckofficer
The controller in those pictures was only a 400 amp rated for 1 minute. Unlike gas and diesel engines, electric motors are capable of a huge peak output for 5 seconds. The Etek PMDC motor I'm using is only rated at 5 hp continuous, 15 hp for 1 minute, and for 5 seconds, what ever your controller and battery can muster. Since the AGM batteries can crank at 680 amps for 10 seconds, it was time to upgrade to a 700 amp controller. I'm still at 48 volts, but could push to 72 volts. At 48 volts X 700 amps = 33,600 watts / 746 = 45 hp for 5 seconds. You have to remember that on an electric motor, all torque is available at zero rpm, that is why even with a thorough pre-flight, everyone that tried to ride it lost control. At 72 volts (if I upgrade) it would be 72 X 700 = 50,400 watts / 746 = 67.5 hp on a scooter that weighs 113 lbs.

Is that your father beaming proudly in the first picture? :D


I very much appreciate you breaking down the math for me on this since my physics and math aren't all that strong. Now I have a better understand of the numbers when I look up the conversion kits. :thumbup:


So, is there anything you haven't hooked up a battery to? Lol! :D That scooter looks killer! 45 hp on that little thing? Yikes! :sweat:




Quote:

Originally Posted by matt167
Theres a guy on Venice beach that builds gas powered beach cruisers with the china engines. They fall thru the cracks. not legal but the engines can be had from a few of the suppliers for california market..

Is this the guy you're talking about: Venice Motor Bikes




On a related note, I have been looking for more information on these gas conversions being illegal. Turns out they are legal because they qualify as mopeds, which require a simple application to be submitted. Cops on the other hand may not be up to date on this, judging from this thread: "CA Laws"


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