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Old 07-25-2008, 10:59 PM   #1
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Default 1/12 Stock Brushless VS Brushed

i was wondering what will be faster a stock brushless (17.5) or Stock Brushed the brushless sounds like lesss work but what will be faster if its brushless what setup is the best to get and if its brushed what motor is goin to be the strongest one
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Old 07-26-2008, 12:58 AM   #2
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With a well and freshly built and fast 27 turn brushed motor I have found the fast lap at the beginning of the run to be a .1 to .2 tenths faster than the average 17.5. However I give the advantage to the BL for an 8 minute 1/12th scale race because it does not fade like brushed motors do towards the end of the run, thus improving its "average" speed over 8 minutes. As for which system is best it seems to be really up in the air. I have run the GTB 4 cell, the sphere and the Speedpassion and they all perform similarly. I prefer the speedpasion for its adjustability and form factor, but I doubt any of those 3 esc's will be what holds you back if this is new to you at all.

As for the car I prefer the rev 5 as it was designed to hold a BL motor and I have found the front end to be VERY durable, easy to adjust (despite how it looks) and easy to drive. You will want to see what others around you are running as well to get help with set up etc.
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Old 07-27-2008, 12:14 PM   #3
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after running a 17.5 all this season and a 27t brushed for the last 18 seasons I can honestly say the 17.5 has the upper hand. On long big tracks you can gear the 17.5 like crazy , and on short tight tracks you have WAY more punch out of the pocket than a 27t. all this year I ran on a short technical track. one thing I ran into was guys gearing with that fast straightaway speed mentallity. You know gear it so it winds out at about the 3/4 point on the longest straight. I found that on a short track if I geared the 17.5 so it winds out at the 1/2 way point of the longest straight I carrried WAY more speed through the infeild tight sections due to having increased torque to get out of corners faster. Gearing down a little actually sped up my lap times by almost 2 seconds per lap . with this mentallity i was gearing at 44/ 78 while others were gearing near 48-50 /78. I must have been doing something right because I tq'd evry week for 3 months solid, and usualy finished the main with at least a lap on the feild.
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Old 07-27-2008, 09:01 PM   #4
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at the carpet nats the 27T was .1-.2 seconds per lap faster than the 17.5. I ran a 17.5 all weekend and could do about the same laptimes from start to finish but just didn't have that extra .2 per lap that the brushed guys did. For club racing I would choose 17.5 over 27T hands down but if you want to cut your motor and rebrush every run the 27T is a hair faster.
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Old 08-15-2008, 01:43 PM   #5
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I was wondering if the 17.5 can be wired with smaller guage wire for the ABC connections? I did this with my brushed stuff to keep the pod freed up. This is my first year running the brushless in 1-12th and would hate to burn it up because of doing something the old way....
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Old 08-15-2008, 06:00 PM   #6
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I'm currently running a CO27 against 17.5's and would say that my motor is a touch faster. I run on a medium size indoor asphalt track. There's nothing special about the motor, either. Red/green springs and F brushes which I change every other or every third race night. I have a fresh cut comm for the night, but that's it. I don't touch it between rounds. Roughly a 49 mm rollout, and I don't notice much fade.
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Old 08-15-2008, 08:14 PM   #7
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Quote:
Originally Posted by scootr117 View Post
I was wondering if the 17.5 can be wired with smaller guage wire for the ABC connections? I did this with my brushed stuff to keep the pod freed up. This is my first year running the brushless in 1-12th and would hate to burn it up because of doing something the old way....
I recently went to 18 gauge on mine. With a dozen packs through it, no problems.
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Old 08-15-2008, 08:39 PM   #8
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Quote:
Originally Posted by Matt Howard View Post
at the carpet nats the 27T was .1-.2 seconds per lap faster than the 17.5. I ran a 17.5 all weekend and could do about the same laptimes from start to finish but just didn't have that extra .2 per lap that the brushed guys did. For club racing I would choose 17.5 over 27T hands down but if you want to cut your motor and rebrush every run the 27T is a hair faster.
How does the 13.5 compare to a 19t?
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Old 08-15-2008, 09:53 PM   #9
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How does the 13.5 compare to a 19t?
13.5 is slower than 19t. 10.5 is the 19t equivalent.
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Old 08-15-2008, 10:19 PM   #10
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13.5 is slower than 19t. 10.5 is the 19t equivalent.
13.5 is the new 19t equivalent. I was just wondering if anyone has done any real testing to compare them. 10.5 and 19t is no contest.
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Old 08-15-2008, 11:45 PM   #11
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13.5 is the new 19t equivalent. I was just wondering if anyone has done any real testing to compare them. 10.5 and 19t is no contest.

We've done lots of testing for 1/12th scale with 13.5, 10.5 and 19t. As with all brushed motors, there is a great range from the fastest 19t to the slowest, but we have found that 13.5 motors are a lot slower than 19t brushed. 13.5 is not the "new equivalent", it is just replacing 19t as the class in between stock and modified (Super Stock)
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Old 08-16-2008, 01:07 AM   #12
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Alot depends on the track layout. On our small track with lots of turns and next to no straights the 13.5 motors are just as fast if not faster then the 19T motors. On a larger track with more straights things will change because the power bands are so much different from brushed to brushless. I imagine stock will be similar between 27T and 17.5.
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