disruptor10
10-04-2005, 10:35 AM
Any one Running a sphere speedo and a stock brushed motor ? Just wondering what the performance was like , thanks
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View Full Version : Sphere running stock brushed motor ? disruptor10 10-04-2005, 10:35 AM Any one Running a sphere speedo and a stock brushed motor ? Just wondering what the performance was like , thanks Bob Wright 10-04-2005, 07:56 PM Corey Heft ran a lap faster at BMS this past weekend by switching from a Sphere to a Keyence with no other changes. SuperXRAY 10-05-2005, 10:25 PM What's that got to do with his question? Besides I think your claim is a load of horse crap. :) He could have 'just ran a lap faster', and it have nothing to do with the speed control. That's a completely unscientific and unrealistic piece of information. But, tell him congrats... Bob Wright 10-06-2005, 07:14 AM I ran the stop watch on both runs,I know what I saw. disruptor10 10-06-2005, 06:44 PM ok now boys no bickering , i was just curious . i'm looking for a new speedo for my CW GBX car that we race on carpet oval and i'm trying to look toward the future Bob Wright 10-06-2005, 07:12 PM From my what I saw I would stick with a speedo for brushed motors if you are running brushed and only use the BL speedo for BL motors if you are looking for maximun performance. disruptor10 10-07-2005, 08:12 AM thanks for your input Bob , appreciate it ...... RULE ENFORCER 10-09-2005, 05:15 AM .......................... burbs 10-09-2005, 05:18 AM What's that got to do with his question? Besides I think your claim is a load of horse crap. :) He could have 'just ran a lap faster', and it have nothing to do with the speed control. That's a completely unscientific and unrealistic piece of information. But, tell him congrats... Isnt performance on the track, ie going a lap faster a good way to tell a speedos performance??? How else would he test it.. Bob is a brushless racer here, and he knows about them.. I wouldnt doubt his comment one bit.. kevinm 10-09-2005, 09:30 AM The Sphere's brushed mode is definitely a compromise in design. It uses one phase's MOSFETs on the (+) side of the motor, and 2 phases on the (-) side. I think they did this to allow reverse for the backyard bashers, without requiring a re-wire job to eliminate reverse for racing. This gives it only slightly less resistance of brushless mode when running brushed. The Novak SS+ and GTB in brushed mode connect all three phases to the (-) and the (+) straight to the battery, which results in 1/6 the resistance of brushless mode. They gave up the reverse function in brushed mode, apparently assuming that the only reason you'd run a brushed motor is if you went to the track and nobody else showed up for the brushless class. Besides, once you've run brushless, why go back to stock? vBulletin® v3.8.7, Copyright ©2000-2012, vBulletin Solutions, Inc.
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