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Setup the board again today
I do need to cut that aluminium fork shorter on the rear still 
Now it’s setup as short as it can be without getting wheelbite on my shoes at full lean, ended up with a wheelbase of 113.5cm / 44.7 inch. Not terribly long but not short either. Running 40/15 angles and the same bushing setup I used to run since esk8con. I also bedded the bushings (is that a word?) sanded down the base of them so it’s actually flat. And axle is perfectly inline with standing platform. No reinforcement against flex, so there’s definitely a bit of flex in it but didn’t feel like too much.
Then went out today for a T-race session.
I actually didn’t start with enough preload on the bushings and did have a wobble which I managed to save. It was definitely much more saveable than the Pitland wobble but not as easy to save as earlier wobbles? It was triggered by spinning both wheels on the front so I guess that’s a fair way for a wobble to be initiated.
Torque felt great with the gears lubed up.
This is also confirmed by the tracking data from the session. I did have a bit less torque than usual but motor amps are configured to 180 for a bit less volatility in the D100Ss and heavier tires and 5% higher geared speed so 5% additional torque loss… I reach 57 in the straight now instead of the 59 on the supernovas.
Here’s a couple laps of footage:
Conditions weren’t great, 13C ambient. Tires got to 35-40C depending on how much I was pushing and with how many breaks. And I was collecting all the pebbles:
Having the full 33 degree lean feels so nice and with these angles and deck flex it turns crazy well despite the longer than normal wheelbase. And not hitting full lean under any condition is also refreshing.
I managed to match my record of 12.82 toeside
Also did a 3 lap toeside PB: 12.98+12.88+13.05=38.91
I did manage to slide them today multiple times as much up to temp as I could get them. The amount of pebbles on the track was crazy today though.
There’s a bit of time still, but not much left in the current setup unfortunately unless I have better conditions - less pebbles and more ambient temperature. The tires are definitely better than Linns and feel about on par to the hard supernovas in similarly bad conditions - the catch is these are 5 year old production (hence the huge discount I bought them at) and were supposed to be medium compound actually. I’ll give it maybe 2-3 more toeside sessions to see what I can do on them before I start focusing on my heelside which is a fair bit slower right now.
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Do you think doing burn outs would be good to get the tire to heat up fast instead of heating up by riding?
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Do you ever scrape the sides of the deck on the ground?
No, the deck remains stationary. The Earth rotates until it hits it instead.
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It’s banned at some of our tracks. Plus it only gives the surface a little bit of heat, whereas with tire warmers I would warm the tire’s core also, so that would be more effective. Tire warmers are the medium term plan.
Also burning rubber with burnouts is not something that I want to subject my D100Ss as I don’t trust them to not blow up. And burnouts would also mean I’d go through tires quicker.
Overall it does work in a pinch but it’s not ideal.
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On 150/160 mm tires I was scraping. Then when I setup the kart wheels and stood below axle I set that up to just about have clearance and not scrape.
Now on the kart wheels (260mm) and standing inline with axle, there’s plenty of clearance at full lean, so it’s nice not having to worry about it.
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Yesterday I broke my record on T-race: did 12.54 toeside
The weather was 25C/ 77F which certainly helped.
Though the middle of the contact patch still looks like it’s operating below it’s ideal temperature. Also looks like I have a bit too much pressure in there, which is technically true, but I’m worried that heating would be even slower at lower pressures.
Now I’m 0.10 away from claiming the fastest lap for myself! Hopefully next session.
The setup does have the ability to be quicker. I had a lap with a really damn great start, but messed up the second half quite hard - still did 12.58.
I am now consistently doing 12.xx, pretty much all of my hot laps were 12.xx and hit 12.5x multiple times and 12.6x many times.
Once I have 12.44 or less and hold the fastest lap, it will be time to focus on my heelside, which hasn’t seen pretty much any attention this year yet.
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Aaand today I’m back on the T-race podium. Went out today for a short heelside session where I did 12.96.
Mario is 0.35 ahead, Reggie is 0.54 ahead still. Not stopping until I have that 1st place though!
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Hammer it bence 
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Today I had a heelside session, and while no single lap record, I did have a 3 lap record that bumps me up to 3rd place on the 3 lap leaderboard. Also had a lap just 0.01 off my single lap record.
13.09+12.98+13.32=39.39
Interestingly I was quick even on a basically empty battery - this shows that power isn’t worth as much as you might think if you don’t have the skill to put it down smoothly, without it messing up your line. So far I only really have the skill to benefit from full power toeside. My heelside needs more work.
I also found out that I really shouldn’t do full battery sessions on this poor 21S4P P42A pack, the BMS got to 74C which sits on top of the cells. Meaning the cells likely got to around 80C.
And I was even considering raising battery amps a bit for some more power toeside where I might actually benefit from it. Well that’s not gonna happen.
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I also put my ESC inside my battery case, but I have a layer of rubber between my ESC and battery so I’m hoping the heat doesn’t transfer.
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I’ve got some foam inbetween and the ESCs have a huge heatsink with fins that have access to fresh air below the enclosure… I think the ESCs are cooled of fairly well. So the battery itself must be generating a significant amount of heat too! Which is totally understandable since I am running 180A discharge 180A regen into a 4P of P42A… That poor pack is abused really hard
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Any plans for a Tabless 21s4p?
Battery heating was a limiting factor for me.
Recently Built a BAK45D pack and it runs at least 17C cooler, riding harder for longer, and the BAK45D runs hotter than the other Tabless cells.
Maybe Nkon will have the EVE50PL available in the not too distant future.
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Need to decide what the next ESCs will be and design the swingarm chassis before I decide on what the new battery will be, but some upgrade is planned for sure. Thinking about 100-120 tabless cells. Also gonna build a config that I don’t have to charge to full so a lot regen amps hopefully isn’t as harmful. I think by the time I get to it nkon will have 50PL which would be perfect
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I am looking forward to seeing this!
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G300 and Tronic had been tested for esk8 and they seem to work fine. G300s is prob better if you want to go <21s and they’re cheaper, but @tuckjohn had issue with them where some parts came loose. Tronic has higher voltage options, but you’re prob not gonna need the 30s option (unless you’re powering a go-kart, oh wait…). Plus I only heard of maybe 2 or 3 people had included them in a build.
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Imo, I did tighten it kinda hard, I think.
Probably user error.
I wholeheartedly recommend G300s, they’ve been great.
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Ash been putting his through the paces and so far they seem to hold up. And I think you can just run the G300 in the rear for power and whatever up front for braking, unless you need G300 in front for even more braking. 
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