Post your DRAG RACE ebike run !!

General Discussion about electric bicycles.
John in CR   100 GW

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Re: Post your DRAG RACE ebike run !!

Post by John in CR » Aug 14 2010 6:18am

Doc,
I think you are in too high a pedal gear if you can assist all the way to 30kph. Where the motor needs the most help is 0-1kph.

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liveforphysics   100 GW

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Re: Post your DRAG RACE ebike run !!

Post by liveforphysics » Aug 14 2010 6:33am

John in CR wrote:Doc,
I think you are in too high a pedal gear if you can assist all the way to 30kph. Where the motor needs the most help is 0-1kph.
I agree. Even with a human body, power is torque x rpm. I would get into a really low gear, maybe a gear where just 10-15kph makes your legs be spinning at peak cadence (if that's possible with the gearing). Then just explode your legs to a blur right off the line for the first ~20-30ft, and once they cant keep up the cadence, just go into a tuck and let the motor do the rest. Just a massive pedaling effort for the first 1-2 most critical seconds, the start.
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Re: Post your DRAG RACE ebike run !!

Post by Doctorbass » Aug 14 2010 11:35am

liveforphysics wrote:
John in CR wrote:Doc,
I think you are in too high a pedal gear if you can assist all the way to 30kph. Where the motor needs the most help is 0-1kph.
I agree. Even with a human body, power is torque x rpm. I would get into a really low gear, maybe a gear where just 10-15kph makes your legs be spinning at peak cadence (if that's possible with the gearing). Then just explode your legs to a blur right off the line for the first ~20-30ft, and once they cant keep up the cadence, just go into a tuck and let the motor do the rest. Just a massive pedaling effort for the first 1-2 most critical seconds, the start.

Yes.. maybe i just miss explained my point..

I mean.. i'm using the low gear for the first kmh.

But what is difficult is to keep the ebike stable while exploding on the pedal

remember it's a DH bike.. not a thin carbon bike.. but probably that stifning the rear suspension will help

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
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D-Man   1 MW

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Re: Post your DRAG RACE ebike run !!

Post by D-Man » Aug 16 2010 8:49pm

Doctorbass wrote:
D-Man wrote:Ok. Did pretty good! That 408 hauls butt.

D-Man, How can you hit 92MPH with... a... 408 ???? :?

and 2.2sec 0-60ft would require incredible power into it!!

It's certainly with a car!!!.. not an ebike!

so what does mean the 408 ?

Doc
Ok, the truth is that it's a 20 year old time slip. Barely readable anymore. I still have the car. A bone stock '70 dodge dart with a 318 and 4 barrel carb and 120,000 miles at the time. Now approaching 200k but I rebuilt the engine about 15 years ago after it got a rod knock. I don't drive it much. It eats gas. At $3.20 a gallon it stays parked. :|
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veloman   1 GW

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Re: Post your DRAG RACE ebike run !!

Post by veloman » Aug 17 2010 1:43am

I think I could hold on to you for the first 10 seconds or so....

What's your time to 30mph? As far as off the line, I know I can reach 16mph in 17 feet. It seems that if you did 60ft in 2.2 seconds, then your 1/8 mile time should be faster...Well maybe not, I guess I was looking at the first run which was much slower than the later runs you posted. What do you feel is the strong and weak points during your runs?


That's definitely not on my ebike though, but on my roadie.


You know, I'd REALLY like to drag race, heading up a steep hill.
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Re: Post your DRAG RACE ebike run !!

Post by D-Man » Aug 17 2010 8:51am

It was the only time I went to the dragstrip. Just something I wanted to do. One thing that was amazing was that the track was so slippery that its like trying to accelerate on a wet road. All the pavement is covered in burnt rubber. Street tires just spin on top of it. You can do a burner almost all the way down the track if you want to.
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Re: Post your DRAG RACE ebike run !!

Post by D-Man » Aug 17 2010 9:15am

Ok. I'll try a 1/4mile run with my ebike. One pedalling+motor power and then one motor power alone. I'll just use my speedometer to measure it and then once it hits .25 mile I will rotate it off the mounts to stop the clock. Then post pictures.
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AussieJester   100 GW

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Re: Post your DRAG RACE ebike run !!

Post by AussieJester » Aug 17 2010 9:32am

D-Man wrote:It was the only time I went to the dragstrip. Just something I wanted to do. One thing that was amazing was that the track was so slippery that its like trying to accelerate on a wet road. All the pavement is covered in burnt rubber. Street tires just spin on top of it. You can do a burner almost all the way down the track if you want to.
...D-Man...they ain't spinning tires coz its 'slippery' its because they are producing alot of power and
trying to get it to the ground, you probably noticed them spraying the track? Thats VHT Track Bite it
increases the traction. I definitely wouldn't call a drag strip "slippery"
not any i been to anywayz, they must be different in USofA Luke? :mrgreen:

A dragstar couldn't get down the 1/4 mile in under 6 seconds if it was slippery buddy ..although
they often do spin their tire a considerable length of the track if they dont get clutch settings right LoL


KiM

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liveforphysics   100 GW

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Re: Post your DRAG RACE ebike run !!

Post by liveforphysics » Aug 17 2010 10:16am

D-Man wrote:It was the only time I went to the dragstrip. Just something I wanted to do. One thing that was amazing was that the track was so slippery that its like trying to accelerate on a wet road. All the pavement is covered in burnt rubber. Street tires just spin on top of it. You can do a burner almost all the way down the track if you want to.

Every track I've ever been to is crazy sticky. Sometimes so sticky they pull your shoes right off if you try to take a step. When cars break on the line, trying to push them backwards by hand takes about 3-4 guys to get them to roll off the track, then one guy can push them fine back to the pits, because normal asphalt isn't sticky.
Each carcinogen vapor exposure includes a dice roll for cancer.

Each mutagen vapor exposure includes a dice roll for reproductive genetic defects in your children.

Each engine start sprays them into a shared atmosphere which includes beings not offered an opportunity to consent accepting these cancer experiences and defective genetics life experiences.

Every post is a free gift to the collective of minds composing the living bleeding edge of LEV development on our spaceship.

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Re: Post your DRAG RACE ebike run !!

Post by D-Man » Aug 17 2010 10:32am

The track was Firebird in Arizona. My first run was just a burner for like a 1000 feet. Even my roommate with a 17sec car did a 500 foot burner. Just street tires. Non-posi rear ends. They probably don't put the vht on the track unless its a major event. Maybe they want to save money. I don't know. :?:

Anyway, I did my 1/4 mile runs! They suck! But I hope you guys like my participation.

Motor Alone:
Last edited by D-Man on Aug 17 2010 12:04pm, edited 3 times in total.
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Re: Post your DRAG RACE ebike run !!

Post by D-Man » Aug 17 2010 10:35am

Motor plus pedalling:

Minus off 1-2 seconds for .26mile!
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Doctorbass   100 GW

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Re: Post your DRAG RACE ebike run !!

Post by Doctorbass » Aug 17 2010 1:22pm

I m preparing a secret weapon to place the bar very HIGH on the ebike drag race! :twisted:

S O O N :mrgreen:


Guess what it is...

( i preffer specifying right now.. IT S NOT A BOOSTED FLUX CAPACITOR !! 8)

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
YOUTUBE---https://m.youtube.com/user/Doctorbasss
http://twitter.com/DocbassMelancon
I speak FRENCH and english

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Re: Post your DRAG RACE ebike run !!

Post by D-Man » Aug 17 2010 1:28pm

Ok. I need to practice my holeshot. I started in the wrong gear and missed a shift when pedalling. I have to be careful not to pop a wheelie or I loose traction. I'll try again soon.
408 front hub
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5 tires worn out

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Re: Post your DRAG RACE ebike run !!

Post by Doctorbass » Aug 17 2010 1:37pm

D-Man wrote:Ok. I need to practice my holeshot. I started in the wrong gear and missed a shift when pedalling. I have to be careful not to pop a wheelie or I loose traction. I'll try again soon.

Great!! keep us updated!!! :mrgreen:

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
YOUTUBE---https://m.youtube.com/user/Doctorbasss
http://twitter.com/DocbassMelancon
I speak FRENCH and english

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Re: Post your DRAG RACE ebike run !!

Post by D-Man » Aug 19 2010 10:22pm

Since there's no other entry's, I get second place! I guess people can't do a quarter mile with a CA. That sucks. :lol:
408 front hub
21000+ miles on many sla's.
5 tires worn out

John in CR   100 GW

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Re: Post your DRAG RACE ebike run !!

Post by John in CR » Aug 20 2010 1:32am

Doctorbass wrote:I m preparing a secret weapon to place the bar very HIGH on the ebike drag race! :twisted:

S O O N :mrgreen:

Guess what it is...

( i preffer specifying right now.. IT S NOT A BOOSTED FLUX CAPACITOR !! 8)

Doc
2 wheel drive?

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Re: Post your DRAG RACE ebike run !!

Post by Doctorbass » Aug 20 2010 9:37am

John in CR wrote:
Doctorbass wrote:I m preparing a secret weapon to place the bar very HIGH on the ebike drag race! :twisted:

S O O N :mrgreen:

Guess what it is...

( i preffer specifying right now.. IT S NOT A BOOSTED FLUX CAPACITOR !! 8)

Doc
2 wheel drive?
no.. it's something else :twisted:

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
YOUTUBE---https://m.youtube.com/user/Doctorbasss
http://twitter.com/DocbassMelancon
I speak FRENCH and english

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Re: Post your DRAG RACE ebike run !!

Post by Doctorbass » Aug 14 2011 11:26am

13 august 2011


KMX typhoon
5304 on 20"
28s A123 and 233A burst 82V min
total weight 250 pounds with me

BEST SCORE DURING THE DAY ( not on the video):
Best 0-60ft: 2.5sec
Best 1/8 mile time: 12.3sec
Best 1/4 mile time: 21.9sec
Top speed 46.79MPH (75.3kmh)




My time slip:
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
YOUTUBE---https://m.youtube.com/user/Doctorbasss
http://twitter.com/DocbassMelancon
I speak FRENCH and english

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wojtek   10 kW

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Re: Post your DRAG RACE ebike run !!

Post by wojtek » Mar 12 2012 4:58am

that is insane!!! :D but i bet you would get to 2.4sec wearing lycras!!!

no clips shoes? :o
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Re: Post your DRAG RACE ebike run !!

Post by ZOMGVTEK » Aug 29 2012 9:34pm

Image

First and only run. I was 'bluetee', 'whitetee' was my friend with a 1000W GM @ 24S.

We attempted to go back for another run, but the bicycles were too fast and they wanted us wearing riding gear.

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Re: Post your DRAG RACE ebike run !!

Post by Doctorbass » Aug 29 2012 9:57pm

ZOMGVTEK wrote:Image

First and only run. I was 'bluetee', 'whitetee' was my friend with a 1000W GM @ 24S.

We attempted to go back for another run, but the bicycles were too fast and they wanted us wearing riding gear.

Aaaaaall riiiiight!! :wink:

I see you beat my KMX for the 1/8 mile , congrat :mrgreen: The 0-60ft is still really good too!

I think i will try my kelly and 125Vdc on my 5302 on 20" on my trike:twisted:
Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
YOUTUBE---https://m.youtube.com/user/Doctorbasss
http://twitter.com/DocbassMelancon
I speak FRENCH and english

ZOMGVTEK   100 kW

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Re: Post your DRAG RACE ebike run !!

Post by ZOMGVTEK » Aug 29 2012 10:07pm

That was with a 12 FET at roughly 8kW, massively phase limited, and a pack charged to only 96.xV. With 100V on the pack, and the 24 FET thats sitting around, I should be able to shave quite a bit of time off. Trap speed won't change much, this bike barely creeps past 50. I was topped out halfway down the 1/8th.

I have a not that exciting video.

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veloman   1 GW

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Re: Post your DRAG RACE ebike run !!

Post by veloman » Aug 30 2012 12:17am

What is your speed at the 60ft mark? I don't have a timing system but I can compare speeds at certain distance markers.
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Re: Post your DRAG RACE ebike run !!

Post by ZOMGVTEK » Aug 30 2012 8:17am

veloman wrote:What is your speed at the 60ft mark? I don't have a timing system but I can compare speeds at certain distance markers.
All I know is what's on that time slip. Compared to when I was running only 50 more phase amps, the bike feels slow at the low end. I'm running the little 12 FET harder than it probably should be, and it's lasted me a while without blowing up. When I first put the bike together, I popped FET's twice at only slightly higher phase currents, and it was a wheelie machine at low speeds. Currently it has no hint of lifting the front tire at all, even if you lean back a bit. The controller must really be limiting things, since acceleration really picks up once the bike gets moving. I can probably get quite a bit more out of this motor with a bigger controller, but I'm happy with that time as is. The bike almost feels slow and boring right now, but 12.2 sec in the 1/8 is a second or two better than I expected. I see slow cars or trucks run high 11's to 12's all the time, usually at higher traps. I should note, this was done at a 'cruise night' type of deal. They intentionally don't prep the track at all, so the kids willing to redline neutral drop or clutch dump a DD don't snap axles all night. Traction is worse than the street, but the bike of course had no issues. The rear wheel is heavy and bald.

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Re: Post your DRAG RACE ebike run !!

Post by teslanv » Apr 05 2015 12:15am

Time to revive this thread...

Here's my Track Slip:
Track Slip 60.2MPH.jpg
Track Slip 60.2MPH.jpg (87.74 KiB) Viewed 1742 times
And here's the video:

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