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When 3s for 4x4 SCT?

When 3s for 4x4 SCT?

Old 11-28-2015, 05:09 PM
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Default When 3s for 4x4 SCT?

With the heavier sct's in 4x4, isn't it time for 3s batteries? 2s may be fine indoors, maybe, but outdoors in the summer is way different. I mean 8th scale is running 4s, and if you weigh a 2wd sct, a 4x4 sct, and an 8th scale, there is a weight progression that shows 3s should be used for 4x4 sct. Time to move up and make it right!
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Old 11-28-2015, 05:39 PM
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Originally Posted by platgof View Post
With the heavier sct's in 4x4, isn't it time for 3s batteries? 2s may be fine indoors, maybe, but outdoors in the summer is way different. I mean 8th scale is running 4s, and if you weigh a 2wd sct, a 4x4 sct, and an 8th scale, there is a weight progression that shows 3s should be used for 4x4 sct. Time to move up and make it right!
maybe its a way to keep folks closer to spec while racing. I had my short coarse truck that I was thinking of getting into the local club racing class. Not me,, all I seen that they are running is any thing and everything , up to 8th scale 4X4 buggies with short course bodies on them.
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Old 11-28-2015, 05:48 PM
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Not gonna happen, if you race at a non-roar place maybe you can do a 3s/low kv setup..will give you the same speeds and should be more efficient. 2s is just as fast as a 4s ebuggy.
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Old 11-28-2015, 05:54 PM
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Originally Posted by NitroLuver View Post
Not gonna happen, if you race at a non-roar place maybe you can do a 3s/low kv setup..will give you the same speeds and should be more efficient. 2s is just as fast as a 4s ebuggy.
Maybe the newer 550 can motors are as fast as the ebuggys but my SCTE doesn't hold a candle to the amount of power my Ebuggy has.
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Old 11-29-2015, 06:25 AM
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Like I said earlier, look at the weight these are pushing, not that much lighter than an e buggy, and really, the power is no where close. I really don't need more speed, just an easier system on the batteries that would be capable of longer run times, and not chance swelling. Everyone gets stuck on the power issue for some reason, I want an easier system on the electronics.
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Old 11-29-2015, 06:52 AM
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I did some home work on running weights and this is what I came up with, 2wd sct between 4.5 and 5 lbs. rtr, 4wd sct between 6.5 and 8 lbs. rtr, and e buggy 8 lbs. rtr. So the ebuggy can run 4s at 8 lbs but the 4x4 sct is limited to 2s, really? So lets figure out which system's electronics are being abused here! Lets see, 2wd sct 5 lbs/ 2s, 4x4 sct 7 lbs/ 3s, and 8th scale 8 lbs/ 4s, makes sense to me.
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Old 11-29-2015, 07:07 AM
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http://www.rctech.net/forum/electric...y-why-not.html
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Old 11-29-2015, 07:09 AM
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I checked out Roar rules to see where they are on this, they list 2wd sct at 3.75lbs min. and 4wd sct at 4 lbs min. They also list e buggy as 7 lbs min. Todays 4x4 sct are 6.5-8 lbs. Roar needs to get with the program here, as today's 4x4 sct are 8th scale based for reliability.
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Old 11-29-2015, 07:36 AM
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Originally Posted by NitroLuver View Post
Not gonna happen, if you race at a non-roar place maybe you can do a 3s/low kv setup..will give you the same speeds and should be more efficient. 2s is just as fast as a 4s ebuggy.
There is your answer. ROAR has never been concerned with things like "will my equipment last", but if your track is non-ROAR, then talk to the Race director and have at it. If other racers worry about people over-powering their truck, maybe propose a rule like "Only 3s with motors 2500kv and lower in can size 3660 or smaller" or similar. What is the old line about "be the change you want to see"

Along a similar note, and for about the same reasons, several racers at my local track running 1:8 e-bug have started experimenting with 6s and 1500kv motors. Speed / power is very similar, batteries are smaller, and everything runs cool.
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Old 11-29-2015, 07:50 AM
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I really don't know why some are worried about too much power, the tires limit how much power can be used, really simple. For outdoor tracks 3s should be allowed. You can run a much simpler and less expensive system with 3s. Make the e buggies go to 2s since it is such a great thing, they weigh the same as 4x4 sct these days. Lets face it, the manufacturers run Roar. If they could make more money off 4x4 sct 3s system, it would change.
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Old 11-29-2015, 08:33 AM
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My Tekno SCT weighs the same as Teknos version of their ebuggy that runs on 4S. Our outdoor tracks are fairly tight so running a 5500kv motor 550 can in a SCT or a 2650kv motor on 4s will yield slow lap times. I scratch my head as to why we can't run open batteries and systems... 2S is inefficient and more costly as one can compromise batteries and electronics more.....but if roar says so all the lemming race directors follow the herd...
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Old 11-29-2015, 04:27 PM
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All 1/10th RCs should be allowed to race with 4S: higher efficiency means less heat, and a lower amp draw (for same amount of power) means you don't need to be chasing high C ratings on your lipos - hooray for cheap batteries!

Weight isn't an issue: you can buy 4S lipos that are the same size as 2S stick packs: if 4S got ROAR approval you'd see 4S's available in all current sizes almost overnight.

Companies like Traxxas and ARRMA are shipping 4S/6S 'basher' systems: hopefully this nudges the industry forward from 2S.
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Old 11-29-2015, 04:47 PM
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So have you guys bothered asking the race directors if you can run 3s/low kv setup? Again if you don't race at a roar facility who cares, Run what you brung
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Old 11-29-2015, 05:00 PM
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Give me list of rc companies that distribute hardcase three celllipo batteries.
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Old 11-29-2015, 06:24 PM
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Originally Posted by Keith B View Post
Give me list of rc companies that distribute hardcase three celllipo batteries.
Smc, their 5000 mah 3s is only 1oz heavier than their 7200 mah 2s.
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