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Speed Runners ~ How Fast Did You Go Today?
- Thread starter Mr.Duke
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had a pretty successful day out but no new pb unfortunately with the dual motor car.
At least I matched my previous 191mph pass twice today tho.
Road was really dirty and I almost had a very bad wreck on the third pass, car did a full 360 in the road when a tire blew but was able to almost keep it on the road.
It jumped the curb and busted a shock and ripped two motor wires.
80% throttle input on 8s-
90% throttle input:
95% throttle input but bad tire blowout
I seem to be stuck at the magical 191mph with this damn car, I know there is more in it tho
At least I matched my previous 191mph pass twice today tho.
Road was really dirty and I almost had a very bad wreck on the third pass, car did a full 360 in the road when a tire blew but was able to almost keep it on the road.
It jumped the curb and busted a shock and ripped two motor wires.
80% throttle input on 8s-
90% throttle input:
95% throttle input but bad tire blowout
I seem to be stuck at the magical 191mph with this damn car, I know there is more in it tho
You’ll get it dude. Getting where you’re at isn’t easy. Getting faster than that is even harder. If it was easy everyone with a few bucks would be putting up those numbers. Glad the crash wasn’t that bad.
Should be a typo. Pretty sure all the SRD packs are 8g. They better be. I just ordered a couple of those for warm up passes. Couldn’t pass them up at $80 each.
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Went out searching today for a longer road for my 4S build (Limitless V2) but had to settle and run it on a shorter road before I lost too much light.
Setup:
- XLX2, 1721-2400kv, 4S Parallel, Yokomo V4 gyro and Perfect Pass, 34t spool and 39t pinion
Some weird stuff with log, it climbed over 17v but I didn't over charge the batter past the typical 4.2v/cell
I did 121mph in about 1200ft
Setup:
- XLX2, 1721-2400kv, 4S Parallel, Yokomo V4 gyro and Perfect Pass, 34t spool and 39t pinion
Some weird stuff with log, it climbed over 17v but I didn't over charge the batter past the typical 4.2v/cell
I did 121mph in about 1200ft
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The Fat Rock is just stupid fast. From when you the dash cam hit 15:31:25 to the crash at 15:31:28 it looks faster than 78. Don't even blink...
There 10g.
Diem Turner
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My SRDs are 8AWG. I have two of the 6500 3S packs.
I'll have to snap a photo. Mine has 10g on it.
Well I'm more confused. Got an 8000mah otw regardless though
Diem Turner
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Weird. I would expect nothing less than 8AWG on high performance lipos.
Disregarde I thought it was the packs that I had. My 3s packs don't come in until today. But hopefully 8g
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Notoriousone
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Its a mistake, I don't see SMC putting out SRD pack's with 10 gauge wires.. The earlier versions all had 8 gauge wire, no reason why the new packs would be different
dk10438
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new PB yesterday. Finally broke the 100 MPH barrier. A couple questions though.
Running
X8S
CC 1650-1717
32T Pinion
34T spool
Limitless V1, otherwise stock
CNHL 6.2A 90c 3S in series
no cap pack.
on a 27T pinion I was able to ht 94 MPH so I was thinking that a 30T pinion would get me to 100 and to give me extra headroom, I bought a 32T pinion so I was a little disappointed that was only able to hit 103 MPH.
On the gearcalc app it calculates 124 mph @3.75V/cell 37,000 RPM with a 32T pinion. However, I only hit 103 mph and 33,500 rpm. I usually take into account voltage sag and assume I'll get about 91% of what the calculator states. Am I missing something? Voltage sag should be about 3.4V??? Or is this the "expected" speed for the above set up?
Running
X8S
CC 1650-1717
32T Pinion
34T spool
Limitless V1, otherwise stock
CNHL 6.2A 90c 3S in series
no cap pack.
on a 27T pinion I was able to ht 94 MPH so I was thinking that a 30T pinion would get me to 100 and to give me extra headroom, I bought a 32T pinion so I was a little disappointed that was only able to hit 103 MPH.
On the gearcalc app it calculates 124 mph @3.75V/cell 37,000 RPM with a 32T pinion. However, I only hit 103 mph and 33,500 rpm. I usually take into account voltage sag and assume I'll get about 91% of what the calculator states. Am I missing something? Voltage sag should be about 3.4V??? Or is this the "expected" speed for the above set up?
Last edited:
Diem Turner
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Set your KV value for about 80% of the actual KV value (1320 in your case) to account for load. Should get you in the ballpark.
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My V1 SRD 3S 8000s have 10AWG
Without seeing the logs, it’ll be a bit of a challenge to see your issue.
My guess is it has more to do with the distance of your run. You’ll need to be on full throttle for a longer bit of time to reach max RPMs.
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dk10438
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Yeah
I think run length is the issue since I don’t actually hit full throttle until it’s about 50 feet from me and I’m confident it won’t get airborne and hit me. As I gain confidence I’ll stay on the throttle longer. Car and electronics are setup the way I want it so I’ll see if I can squeeze out a little more speed…
