20s Little FOCers on stooge SRB v5#1

Theoretical is 73.9mph with that setups yes on the BRP 150mm wheels. Definitely agree with all of what you have to say in terms of gearing and cost. An investment for sure. But there are cheaper high current escs like the Makerx G300 on the market too.

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Not sure which version little focers you have, how many battery amps can they support?

7PM
Joint i2s OC and i2s SD event. I’d expect there to be stuff up on instagram today/tmr

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I believe 100 Batt Amps but I honestly cannot confirm that as Idk where the older version spec sheet is. I believe they are 3.0 @shaman would you by chance have specs on them?

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i had mines set to battery 95 per esc with no issues (not that i ever got it that high)
also only maxed out at 197a @61v for 12kw

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Gotcha! That would put me to 123 mph gearing with 78T on the 10" gokart tires I’m planning for after esk8con :sweat_smile: So adding to the cost would be 4x custom spurs well over 100T, at which size stock would be iffy as well

The G300 are a nice alternative for sure and it’s very reliable as well unlike the D100S which no longer has a spotless reputation… But it’s still like 1400$ of just ESCs for 4WD. I would definitely consider them if I were doing a 2WD build, but I like 4WD so much more as I mostly race short track.

Besides, I honestly doubt I could actually put down more than the 22kW or so the reacher setup maxes out at, especially short and medium track, no tef1.

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For short track yes, but I definitely found this not the case geared for anything more that 60km/hr. Switching between the v5 and my 4wd made the 4wd feel very underpowered for long track even with the 4wd geared 30km/hr lower. I did run 85’s up front for a short time but found it pretty pointless when the traction isnt there and I prefer a rear bias for braking.

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If you were to run the same split as me (it’s actually quite preferential) you’d max out the rear batt amps for acceleration and the front batt amps for brakes. Then run 35-50% of these values to the other side depending on preference. With battery amps I am okay with up to about 50% of the rear values in the front and vice versa…

If it’s 100A each then spec the battery for 300 total, if it’s 80A only then spec for 240.

You’d ideally not go over 50A per cell, so I’d say 6P is the minimum you want to run to not overstress cells. And higher P is reducing sag so even though you are pushing the same amps you gain power (although less and less). Tbh I’d start with thinking about what you can fit without it getting in the way when you lean forward for acceleration and back for braking, and what fits without making the battery awkward to build.

6P should be fine for acceleration but the reverse sag might bite you if run the same amps for braking, not sure how much sag they have exactly and how happy the focers are with some spikes. So if it’s easy to fit more P I’d say feel free to go for it.

Yeah, probably is a skill issue with me :stuck_out_tongue:

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I’ll believe it when I see it. I’m not ready to call bullshit on the hobbywing ratings because they do have the low end torque. @sugandese out-accelerates my 6495 setup by a mile and I’m geared to less speed than him. We don’t really do long track, and his temps are still way less than mine…

The theoretical just doesn’t stack up here for us.

Oversteer bias gang :sunglasses:

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I know if you’re braking it straight lines a front bias is going to be more effective. I always felt like I was fighting heavy steering or understeering trail braking with too much stopping power up front though.

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only way i’ve seen vesc be even comparable to the 56118 and 70125’s is on awd with hv batteries

me too, with the reacher motors running higher than 10k rpm. That overheats a lot faster :smiling_face_with_tear:

The 2000A and 1600A ratings are definitely bullshit, but it’s possible that it might do like 7-800A - at that point it’d be heating up for sure though. I’m definitely not believing any more than that.

My 2WD 6495 setup when geared to about 65 km/h just spins pretty much any 6" tire up to about 30 km/h where the limit starts to be the 13kW battery… How many phase amps are you running? Some data, measured 1.09 sec to 20mph at around 85% throttle. That was about 170A each, and grip limit. If I could put down 100% throttle of that power that’d be enough for 1st place in the drag times. I think the absolute max I got the motors up to was around 85C, so still had 15C headroom. Granted that was 20C ambient.

Heating is iron losses on reachers. Gotta gear so they don’t bite you in the ass as easily and gotta have enough amps to compensate.

Ur Tires would literally Explode at 800A @Dinnye

I’m not sure the spinning tyres thing is a real flex. Id say most of us are fighting traction issues

i think the point he’s trying to make is that he doesn’t have enough traction running 6495’s at full power to justify the 56118’s at more amps

Haha yeah I think he’s referring to the gearing not actually spinning at that speed.

right i did NOT read that Correctly @sugandese