Anybody got acceleration numbers?

professor

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How about 0-30?
I don't have any yet (middle of winter). Anyone else?
Can't go on dragtimes.com and look up motorbike stuff.
 
0 to 25 is more fair since around 25 is top speed for those of us without high-rpm engine porting and with stock sprockets. Mine is ported for low rpm grunt but since it has a reed valve, KDX CDI, Dellorto carb, higher compression I'd bet it's not bad at acceleration. I'm just not sure how to test it without a wrist watch. (I've never owned one. by choice)
 
Another question is about starting from zero. Do we pedal or slip the clutch? Slipping the clutch would probably be most fair since we all have different leg strength. Doing it that way it took me around 10 seconds to get up to 25mph but that was just counting, not using a watch. Another way to do it is start the count from a set mph, maybe 10 or so. That way the skil of slipping the clutch and the leg strength are both discounted.
 
Yeah, and probably have different catagories like, straight drive or shift kit.
I don't have a spedometer or decent weather yet.
"Indecent" weather sounds like a topic for the Combustion Chamber.
 
From 10 mph to 28 mph in 5 seconds - about 200 feet - in a test that I did.

I have the GEBE system with a Tanaka 32cc engine. To test how fast it could accelerate, I pedaled at 10 mph with the engine in idle (centrifical clutch not engaged). Then I went full throttle and at the same time I pedaled as hard as I could. I checked my speed at 5 seconds. I was going 28 mph and reached that speed within about 200 feet.

As an old pedal cyclist, that is an incredible acceleration for a bike! I found it thrilling to be able take off like a rocket!
 
So you added Nitrous footside to your motor.......

Nitrous footside - I like that.

Actually, I can be a pretty strong pedaler, at least for a short time. I've tested it on a bike that measures power output. I can put out over 0.5 horsepower for a brief spurt (maybe half a minute).

The Tanaka 32 is rated at 1.6 peak brake hp and 1.1 hp continuous. I think the continuous hp is the number that applies to this test. But the motor delivers 1.1 hp only at high revs and high speed. At low revs, like at 10 to 15 mph, the motor delivers only 0.3 to 0.5 hp. Therefore, when accelerating from a low speed, my pedaling more than doubles the power and acceleration initially.

But after the initial acceleration, the motor totally dominates. I can keep pedaling at 0.5 hp for less than a minute. The motor can deliver 1.1 hp all day long.
 
pedaling is cheating. That throws a variable into the equation. We need a test that is standard and doesn't let the strong legs have the advantage. Start your test from 10mph w/o pedaling and report back. Also let us know if you have a shift kit or if its one speed. Two distinct categories.
 
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