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  #21  
Old 14-Mar-2005, 23:08
Felix Felix is offline
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Originally posted by rob41b
...and how many pulses per rev of the sensor (if you put it on the gearbox O/P) is a simple calc on the 15/41 (or whatever) ratio of the final drive...

Erm, actually, no. It's only the size of the rear sprocket that matters. No calculation required. Think about it.
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  #22  
Old 14-Mar-2005, 23:38
cmoss cmoss is offline
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Sorry Guys not a clue, but they tune the Ducati's for the Monster Mob Team.
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  #23  
Old 14-Mar-2005, 23:43
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Is that, or wasn't that slingshot racing?

Jim Stock etc?
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  #24  
Old 14-Mar-2005, 23:51
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Simon Reed Simon Reed is offline
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no,its FW developments,frank wrathall,ie Dynojet uk !!!,jims nothin to do with them at all.he sells race bikes !!!
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Old 15-Mar-2005, 00:05
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Originally posted by Simon Reed
no,its FW developments,frank wrathall,ie Dynojet uk !!!,jims nothin to do with them at all.he sells race bikes !!!

....Errrr and sets up the Monstermob bikes for Birdy
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  #26  
Old 15-Mar-2005, 17:54
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Quote:
Originally posted by Felix
Quote:
Originally posted by rob41b
...and how many pulses per rev of the sensor (if you put it on the gearbox O/P) is a simple calc on the 15/41 (or whatever) ratio of the final drive...

Erm, actually, no. It's only the size of the rear sprocket that matters. No calculation required. Think about it.

Felix, Go on then, I'll bite. If your using the pulses on the front sprocket as the speed input, why don't you need to do the math? The speed the front sprocket rotates compared to road speed, is goverened by tyre circumference and final drive ratio. Eg. a tooth of the back means more road speed for same front sprocket rotations.

Rgds, Rob
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  #27  
Old 15-Mar-2005, 18:39
Felix Felix is offline
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Mood: Is 112 dB loud enough?? What??
One revolution of the rear wheel equals the number of teeth on the rear sprocket, which is also that many links of chain travel. What your measuring is chain links, even when the sensor is positioned on the front sprocket. I know it seems counterintuitive but that's how it works.
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  #28  
Old 15-Mar-2005, 19:13
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Ah, different approach. You mount the sensor on the front sprocket, but tell the dash, logger, whatever, that it's a 41 tooth and is equivalant to x meters of travel. Got ya.

Rgds, Rob
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  #29  
Old 15-Mar-2005, 22:55
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Regardless of all that, spoke to Translogic today and they reckon it won't work with their dash. Not sure why, but looks like I'll be putting a couple of ferrous bolts back into the rear disc.
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  #30  
Old 16-Mar-2005, 00:04
Felix Felix is offline
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Hard to believe, that.
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