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emaxxnitro
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08.30.2009, 07:50 PM

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Originally Posted by crazyjr View Post
I think it's direct drive verses a gearbox/slipper setups, only thing i can think of. May also be the body is higher and allows more air to cool, Buggies don't have much room for air vents
tranny vs. direct drive?


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starscream
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08.30.2009, 07:56 PM

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Originally Posted by emaxxnitro View Post
tranny vs. direct drive?
The revo's slipper clutch can help reduce the amount of initial current.
Unless you run RCM's slipper diff, then its possible that the buggies direct drive may pull more current than a MT.
The MT's may also soak up bumps better than a buggy which may keep the fans from failing as easily.

The HV needs proper cooling or it will "let the smoke out"


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Last edited by starscream; 08.30.2009 at 07:57 PM.
   
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starscream
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08.30.2009, 07:51 PM

Quote:
Originally Posted by crazyjr View Post
I think it's direct drive verses a gearbox/slipper setups, only thing i can think of. May also be the body is higher and allows more air to cool, Buggies don't have much room for air vents
Sorry for side tracking the thread...

I think you're right. If the fan looses teeth or fails at all the HV will go up in smoke. If any esc requires a fan from "letting the smoke out" then a built-in thermal shutdown should be required as well. Whats funny is that the HV motor has this feature but not the ESC...
I'm interested to see Novaks 8th scale ESC though. I haven't heard anything about it lately though


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BUSAFIED
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08.31.2009, 09:03 PM

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Originally Posted by Ryu James View Post
I keep seeing these posts all the time where people say something to the effect of "i want to run 2200kv on 6s so i can smoke the nitros at the track and embarass them. lol" of course, 6s/2200kv is just an example. the motor and batteries vary but the goal is the same. to beat nitros. when i read these i think to myself, "you are only going to embarass yourself." anyway, in my experience the only time brushless will "smoke" nitros is in a straight line. at least at my track, the nitros go just as fast as any brushless can around the track and we all take turns winning. sometimes nitro, sometimes brushless. i just thought some of the newbs should know that having a faster car does not necessarily mean you will be faster at the track. i know i thought the same thing a year ago when i was getting into brushless. that my cars were just so fast i would definitely beat the pants off the nitros. well, i lost my pants. when it comes to racing, skill is the best way to win. and where is the glory in beating i nitro in a straight line anway? dont get me wrong. i LOVE speed! but i know that my 55mph brushless 8b goes around the track at the same speed as my friend Joe's 40mph nitro 8b. does anyone agree? or are there tracks out there really large enough to open up a brushless motor to 60mph and still keep the car on the track?

my first goal when going brushless was to smoke the nitros. That goal has been accomplished. My truggy has no problems keeping up with the nitros out here or passing them. This is running on a 3S, though. If I end up breaking out the 4S, it's so unfair. 5S is simply retarded...and totally unusable. Then again, my motor plays a big part in that.

After racing, though...it's a completely different story. I agree with you wholeheartedly; you must become a better driver. That's the only way you're going to win a race. However...brushless has distinct advantages on a race track; which is why I'm somewhat curious as to the fairness of brushless running with the nitros.

Before anyone pegs me as being anti-brushless, please bear in mind that BL is the ONLY way that I'll run. I hate having to tune a nitro engine...it frustrates me. And I love the ease with which I can run my BL setups all the day long. The only advantage I see nitro having is that in the really long Mains, all they need to do is gas up and they're off. Much quicker than a pit stop for a BL car, no doubt. That's not enough for me to switch over...sorry. Still gonna be brushless, baby.

If there is one thing that I love about my BL setup: down the straights, I build up an even larger lead. That's one of the things that was killing the other drivers. First one was my consistency...I was rarely on my lid. Second thing was the huge gaps I'd build thundering down the straight.

They're on to me, though. This next race will be tougher for me...I have no doubt about that. I'm almost certain that they're going to step it up several notches...and with my experience compared to theirs, I think I may have a tough time of it. It's a little nerve-wracking knowing that they're gonna be gunning for me, but I wouldn't have it any other way.

Wish me luck.
   
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zeropointbug
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08.31.2009, 09:24 PM

Yeah, no offense, but you have a stupid setup...... I mean that with the deepest respect! You should invest in a 1500Kv. motor and run 6s, you will not want to go back to LV.

Back to thread topic, I have been thinking about this, and I don't know whether I am simply a good driver, or if I am average and the brushless gave me a big lead? Or both? But I find it odd that my first race I nearly got 2nd place, and then my second race I get 1st, by a long shot, left everyone WAY behind, and broke lap records. So what is it? It could be the track that caters to electric power? Could it be the way the truck setup compared to the other trucks? (lowest suspension setting, P3 rockers) Could I have still gotten 1st if I were behind the wheel of a nitro Revo 3.3 setup the same way? Perhaps, I don't know... one thing I do know is.... well, BRUSHLESS ROCKS!


I know I have started a thing with the guys at my track, the fasest guy there converted a 8b to Tekin system, and he wants to do a truggy for next year, along with 2 other guys are on the band wagon to get some BL truggies for next year as well.


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08.31.2009, 10:01 PM

Quote:
Originally Posted by zeropointbug View Post
Yeah, no offense, but you have a stupid setup...... I mean that with the deepest respect! You should invest in a 1500Kv. motor and run 6s, you will not want to go back to LV.

Back to thread topic, I have been thinking about this, and I don't know whether I am simply a good driver, or if I am average and the brushless gave me a big lead? Or both? But I find it odd that my first race I nearly got 2nd place, and then my second race I get 1st, by a long shot, left everyone WAY behind, and broke lap records. So what is it? It could be the track that caters to electric power? Could it be the way the truck setup compared to the other trucks? (lowest suspension setting, P3 rockers) Could I have still gotten 1st if I were behind the wheel of a nitro Revo 3.3 setup the same way? Perhaps, I don't know... one thing I do know is.... well, BRUSHLESS ROCKS!


I know I have started a thing with the guys at my track, the fasest guy there converted a 8b to Tekin system, and he wants to do a truggy for next year, along with 2 other guys are on the band wagon to get some BL truggies for next year as well.
whaaat? Why, I never! Bollocks, sir...pure and simple.







just kiddin. :)

Hmm...yes, well, I have been told that several times. The 1.5D is stupid on 4S...and on 5S it's not even anywhere close to a matchup. I was supposed to to do the 2.5D, but when I was ordering the motor, I had two in my shopping cart...and I inadverdantly cancelled out the 2.5D and instead bought the 1.5D. Didn't find out until later (and after they had shipped the motor). Great.

Oh well...perhaps in the future I'll get a lower KV motor and get off the LV wagon, but a couple things keeps me on it:

1) I'd have to buy another motor. Don't think I want to starting spending thousands again to get another good setup

2) battery collection. The highest voltage batt I have is a 4S. If I were to switch out to a HV setup, that means I'd need to replace the current battery collection, which is already sitting at about $1500 bucks (more if you count the batts that sacrificed themselves in the conquest of power).

And then, I think I'm awfully spoiled by this monster of a motor. It's so insane I just absolutely love it.
   
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brushlessboy16
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08.31.2009, 10:36 PM

Power delivery is the main thing.. my track is hard packed and bumpy. I simply cant put that much power down... throttle control and finesse are you friends with overly torquey cars. but being able to do the "over the top" pass on a nitro over a triple is always fun


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08.31.2009, 10:41 PM

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Originally Posted by brushlessboy16 View Post
Power delivery is the main thing.. my track is hard packed and bumpy. I simply cant put that much power down... throttle control and finesse are your friends with overly torquey cars. but being able to do the "over the top" pass on a nitro over a triple is always fun


yup. and boy is there torque. 11t pinion and the ferris wheel spur of the X1-CRT makes fer some interesting times. Most especially for the drivetrain.

Last edited by BUSAFIED; 08.31.2009 at 10:42 PM.
   
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brushlessboy16
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08.31.2009, 11:11 PM

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Originally Posted by BUSAFIED View Post
yup. and boy is there torque. 11t pinion and the ferris wheel spur of the X1-CRT makes fer some interesting times. Most especially for the drivetrain.
My old cen matrix did that one better.. 66t spur gear.

sorry for the OT


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Ryu James
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09.01.2009, 01:13 AM

i saw on of those old x1 crt's at the track recently. what is with that huge spur gear?? is there an advantage to that?


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09.01.2009, 02:25 AM

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Originally Posted by Ryu James View Post
i saw on of those old x1 crt's at the track recently. what is with that huge spur gear?? is there an advantage to that?
I have no clue. Maybe it's to help with the engine temps and to make it quick out of the corners.

I think with the exception of the Cen BB16 was talking about, it's one of the bigger spur gears out there. I think the next closest one is a 56 or 58.
   
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_paralyzed_
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09.01.2009, 02:38 AM

Quote:
Originally Posted by Ryu James View Post
i saw on of those old x1 crt's at the track recently. what is with that huge spur gear?? is there an advantage to that?
they had buggy diffs and needed the huge spur for proper gear reduction IIRC


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09.01.2009, 02:22 AM

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Originally Posted by brushlessboy16 View Post
My old cen matrix did that one better.. 66t spur gear.

sorry for the OT
another ferris wheel. talk about a gearing nightmare.
   
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SpEEdyBL
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09.01.2009, 02:52 AM

From my observation the Tekin 1900 (or a 1512 1.5Y) on 4s w/ zero degrees of timing is a hair more in power than the nitro engines. On 5s it just blows them away.

IMO, it's really runtimes that are the issue especially when the mains are 20 or 30 minutes long. I was running a 20 minute main at a large outdoor track, which I was leading for the 14 minutes by more than a half lap. But when I decided to change my pack at that point, it of course dropped me to second, almost third, and it was hard to adjust to the higher voltage of the fully charged pack. It's difficult because 4s 5000 mah charged to 90% (4500 mah) gives me 19 minutes of runtime geared 14/46. One tooth lower could probably give me that extra minute but it's risky.

One may say to get a bigger pack or go up in voltage and less mah, lower kv motor etc, but I don't really want to add the weight of a higher capacity pack, or have to deal with the higher center of gravity of a pack with more cells. The 1900 on 4s has proven to be a VERY efficient setup with VERY wide gearing range.


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kalbien
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just my 2cents - 09.02.2009, 08:57 AM

Well so far I can say is, that top speed is not that important on track. I saw one track that is tuned for 1:6 2wd cars that allowed me to hit full throttle for more than 2second. What is important and what makes huge difference is how fast you will get to top speed. Nitros are accelerating way slower so if they need to clear longer jump, they have to come at high speed before it and that could be tricky and can cause errors. I can simply come at normal speed, hit full throttle 2meters before the jump and clear it with no problem, therefore less risk, less mistakes, better times.

however without slipperential, my car wasn't smooth as nitros and I did not liked it. Now it's perfect.



p.s. if you are beating nitro truggies with brushless e-revo, it's in hands of pilots. truggy, no matter what powered, will eat revo in corners. or that track is full of jumps after 2meters of straights and nitro truggies cannot clear jumps and you just own them because of that.

Last edited by kalbien; 09.02.2009 at 08:59 AM.
   
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