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Old 08-07-2006, 03:47 PM   #16
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Originally Posted by bxpitbull
I guarantee the individual you ran against had it geared incorrectly. My 4.5 is a rocket and there is no way on the planet someone with anything less than a 7x2 roundwire keeping up with me. An 8 single doesnt spool hard enuf to hang with a 7x2 and most certainly cannot hold a can of dog piss next to a 4.5. But, you are there and I am here, so I guess we will never kniow. Bu that being said, when people run open modified (pros) I see more 4.5's, 7 doubles and singles.....no where in the pack is a 8x1 mentioned.PLEASE man.

i can assure you that he had it geared as novak recomends. my shock 8x1 is not exactly stock. i have it in a 19t can which gives it more torque and power. this is run with about 18-20 degrees timing depending on the layout and ambient temp. his car with the 4.5 gets me out of the hole but my car has superior speed. i run matched 4200's ,brand new, and his are newer 3800's.

but each to his own.
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Old 08-07-2006, 04:05 PM   #17
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interesting Z. Just for kicks and giggles, I put an D5 8x1 with a Dually and 7 cells in my TC3. Geared it at 72/21 (48p) FD of 8.57 and went up against a friend of mine driving my Pro 4 on 6 cells with the GTB 4.5, geared at 98/24 (64p) FD of 9.95. He smoked me every which way but lose. Out-cornered, straight aways, in the sweepers you name it. Other than the fact one is a AE and the other HPI, they are both my cars and set up with pretty much the same roll-out, tires and wheels. Same servos. Only difference being, he ran IB 3800's in the Pro 4 and I ran MATCHED GP 3300's. Now, I know the IR in the 3800's is way lower, but the extra cell by theory, shouldve given me the extra RPM's. UH UH! NOPE! With the 4.5, better run time, way more punch and I got beat by my own car. So..........
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Old 08-07-2006, 04:08 PM   #18
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Originally Posted by G2B Anthony
Hi bxpitbull

LRP 4-Star (5.5 turns) - Similar to a brushed 10T motor. <-- is it correct?
From what I've seen, more like a 7 turn. Still cant hold a can of piss next to the GTB/4.5. Trust me, I had the neo one 3 star and once I got the GTB/4.5, I traded the Sphere/3 star for a micro RS4..ROLLING CHASSIS! I put a mamba 8000kv in that though
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Old 08-07-2006, 04:09 PM   #19
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Yo Z, you know, not for nothing New York isnt that far from Ohio........
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Old 08-07-2006, 06:00 PM   #20
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http://www.evilmadscientist.com/arti...HomopolarMotor
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Old 08-07-2006, 06:18 PM   #21
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Default Expectes Top Speed For a TC4?

What kind of top speed can be expected from a Novak 4.5 brushless system on a TC4? I want to build a rocket parking lot basher due to the fact that I own another one for competition. I am not worried about rules.
Godspeed
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Old 08-07-2006, 06:21 PM   #22
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syndrome's bl/brushed equivalents are more accurate
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Old 08-07-2006, 07:11 PM   #23
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Quote:
Originally Posted by bxpitbull
interesting Z. Just for kicks and giggles, I put an D5 8x1 with a Dually and 7 cells in my TC3. Geared it at 72/21 (48p) FD of 8.57 and went up against a friend of mine driving my Pro 4 on 6 cells with the GTB 4.5, geared at 98/24 (64p) FD of 9.95. He smoked me every which way but lose. Out-cornered, straight aways, in the sweepers you name it. Other than the fact one is a AE and the other HPI, they are both my cars and set up with pretty much the same roll-out, tires and wheels. Same servos. Only difference being, he ran IB 3800's in the Pro 4 and I ran MATCHED GP 3300's. Now, I know the IR in the 3800's is way lower, but the extra cell by theory, shouldve given me the extra RPM's. UH UH! NOPE! With the 4.5, better run time, way more punch and I got beat by my own car. So..........
after looking at your roll out on the tc3 and the pro 4 i came to this conclusion.

the tc3 is rolling out at .8940944" assuming you are using 62mm. rubber tires.
the pro 4 is rolling out at .7703082" also under the assupmtion you are using 62mm. rubber tires.

this is a differnce of .1237862" between the two roll outs. depending on the track layout, ambient temp, and how hard you goose the throttle, the brushless motor WILL beat you out of the hole and for the brief straight after a turn, but with your roll out on the tc3 ( brushed motor ) you should eventually catch and pass him, this is assuming there is a straight large enough to accomodate the top speed of each car.

also is your brushed motor is its peak preformance? i.e. is it cut? new brushes? timing adjusted for max. speed and amp draw? these are things you must consider before you even attempt to compare a brushed motor and a brushless motor.

at my track (smooth, fast european style horsepower track ) the average driving line is approx. 630-645 ft. drivig line, full throttle half of the time. in my conditions and temp. the 8x1 WAS faster by about .4 tenths of a second per lap, and 2-3 m.p.h. faster than the 4.5.

also my motor was cut, rebrushed and retuned after EACH run to assure peak preformance from my 8x1.

those were my test controls
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Old 08-07-2006, 08:14 PM   #24
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I think it's safe to say that the exact numbers are subjective, and predicated upon a number of external factors such as track type, car type, etc. This has always been the case with motors, and the trend continues with brushless. Plus, since the motors are a lot more flexible with how they can be geared, it's very difficult to make a direct comparison. As such, giving a range for brushed equivalency is probably the best bet.

As always, it's important to use the right tool for the right job, and that applies to motors as well. With the versatile range of brushless motors now available, it's safe to say you can find a brushed or brushless motor that's right for your situation. You just can't make direct comparisons between them, because they're different. Very much like how you can't make direct comparisons between two motors of the same winding from different manufacturers. The Reedy Quad mag vs. a KD, for instance. Same class, very different motors, each with its proper place.
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Old 08-07-2006, 08:17 PM   #25
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very true syndr0me, thank you for ending that pointless, acomplishmentless bickering.
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Old 08-07-2006, 08:31 PM   #26
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Syndrone - With you all the way.
Thanks for the FAQ. I think a lot of BL first timers will find it very helpful indeed. Would be nice to start a poll somewhere to graph what people thought the relative brushed equivs. are.

But for all purposes and intents - good job!
Not sure what all that SNAFU was about comparing a non-standard 8t to a 4.5 came from.. but meh.

I'll point a few ppl this way. They're love it.. CHeers!
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