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1800kv too slow on 4S in truggy?

1800kv too slow on 4S in truggy?

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Old 10-31-2010, 03:08 PM
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Exclamation 1800kv too slow on 4S in truggy?

Anyone ever try running a 1800kv motor on 4S in 1/8th truggy?

I hopped on the Castle motor deal and I'd like to run it, but I'm worried about top end or having to gear it sky high. I'd like to stick to 4S because thats what I run in my buggy too. I'd rather prefer not to buy a separate 5S or 6S pack.
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Old 10-31-2010, 03:23 PM
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I got same motor from Castle and 4s seems not enough. I'm using in my buggy but I think I need 6s.
I was using 2050KV/4s in my Losi 8ight-Te back in Summer. 2050KV+4S+Truggy=Fine.
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Old 10-31-2010, 04:48 PM
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1800 is generally for 5s. 6s usually uses 1350-1600kv
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Old 10-31-2010, 06:22 PM
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How much kv u need will also depend on how big yr track is. FYI, Tekin RX8 ESC has adjustable functions that you can use to tune the power output. Go read up in the Tekin thread.

*Note: A lower kv motor consumes less kv compared to a higher kv one. It tends to generate less heat which is good. My views.
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Old 10-31-2010, 06:28 PM
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I ran a 4 pole 1850 motor and it had plenty of power. I geared it down to keep it nice and cool and had plenty of power to spare on 4s. I ran it on about 80 percent to have the speed and be in control. You will be happy.
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Old 10-31-2010, 06:30 PM
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???? I run a 1580 on 5s and it pulls everything on the straight
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Old 10-31-2010, 06:32 PM
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If you plan on running the 1800kv on 4s I would say as long as temps allow just gear w/ a 15t spur/bell depending on your setup (2t bigger than what you ran w/ the 2200). 16t max. I run on a pretty big track and have always used 12t and 13t setups in my 8ight-t on 4s lipo, 1y(2200) setups. I snagged one of those 1800kv's as well and plan on trying it out next season, I'm thinking it will be nice to get an extra few minutes of race time on the longer a-mains when I'm racing vs nitro's. Time will tell.
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Old 10-31-2010, 06:38 PM
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in my ae I run 14t and it is cool and can run 20 mins easy and still be cool, but like I said running on 80% so the tires dont just spin.
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Old 10-31-2010, 06:42 PM
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I'm using the 1512 1800 on 4s in my buggy on a fairly large outdoor track. I geared it for just under 40. The speed is great until you get down toward the end of the pack and it starts to slow down just a little too much. Temps are usually around 150-160.

Depending on the size of the track you will probably be ok.
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Old 10-31-2010, 08:24 PM
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Hey get back to us on what u think after you run it.
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Old 10-31-2010, 09:12 PM
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Ostach, I noticed you ran it in an RC8T. What spur tooth are you running with your 14T pinion?

I have a Tekno RC8T conversion on mines so I can afford to be creative with gearing since I run mech brakes and takes a good load off the motor.
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Old 10-31-2010, 09:47 PM
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running a 1700kv Tekin on 4s with a 16T pinion...same speed as the others on the track....
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Old 10-31-2010, 11:03 PM
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well currently i have a RC8T-CE converted to Electric,havent got my "Other Car Yet"
however what i can say is for me i use a Tekin 1700Kv(Truggy)
motor in mine on 4S and i can say i have no problem with it being as fast as anything else on the track?
i do have it geared at 18/50 as for heat?
it gets to about 130+/- 3 deg at a place we race at called "Revelation" and it's about 200 feet by 100 feet pretty big with massive jumps,and for Indoor i'll use the same at a track called
West-Coast R/C inoor and a smaller but dosent get that much more hotter? bout 145 on "Average"
had a 2250kv in it before, it was just "Over-Kill" was great for flat out "Speed" even the 2000kv was allot, the brushless motors of today develop so much power almost no need to get a insane motor? if not racing? a big motor is COOL! can just get wild on the speed runs and having fun, if "Racing" depepnding on the "DRIVER"
some will like the Over power motor? some may not?
but to be able to "Lay-Down" the power is the "Key"
even with a 1700kv the front end still pulls off the ground with no problem. but once again, this is for me? some may not like a smoother "Power Band"
i would say "Start" with a 2000kv type motor a shorter motor can
(usually around 65-68mm) are the buggy ones,
longer cans (usually around 71-74mm) are Truggy ones,longer can "More Tourqe"
hope some of this can help.....
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Old 10-31-2010, 11:37 PM
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Thanks for the info and feedback guys. I'm encouraged to hear that there is a bigger sweet spot in terms of kv motors and gearing.

I think I'll pick up a 16T or 17T pinion and try it out. My track is fairly medium sized. Wouldn't say its as big as Revelation, but there are a few tight spots too. Tekno long shank pinions are $15 a pop plus shipping, plus they only work on Tekno conversions, so I just wanted to make sure.
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Old 10-31-2010, 11:37 PM
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I run the 1800kv short can NeuCastle in my RC8Te on 4S geared 46/18 and it's perfect. I get lower 40's MPH with lots of punch and it runs very cool. I have my mamba set at 30% punch control and the timing at 10.

I also run the 1800kv in my buggy on 4S, My Eight E is geared 45/17 and is a little faster than the truggy due to the diff ratio.

Last edited by CarlCrocco; 03-16-2011 at 04:11 PM.
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