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That's interesting, I have noticed that my batteries seem to be near storage voltage after my Xmaxx hits LVC. I haven't checked what the LVC is set for yet. Is that what you mean? I have 2 of the Firma 160's, the original (orange) that came in my K8, and a v2 (black) that I bought from a fella over on AF. New take-off. The v2 is in the Xmaxx.
Ay, disregard, I found your thread from 2021. Reading now.. my initial thought is perhaps the cheaper batts triggered LVC sooner due to voltage sag? Not sure. But thank you, I'll be sure to read through.
Could very well be. Maybe try setting the LVC to a lower setting. As Grey mentioned, he noticed that too I believe, because the Firma doesn't have actual voltages you can set. It's like low, medium, high right?
Correct, and even with the same battery packs it seems to trigger differently each time. Sometimes its about the same, other times, not so much.
I admit, I haven't even plugged in a program card on the v2 yet, dropped it in, programmed throttle range and sent it. The v1 I have adjusted punch on, initially I cranked it up since I felt the K8 had some lag. Worked, too well, started heating up the esc, so I went back to stock. I run quite a few different brands of batteries, essentially whatever's cheapest when I'm shopping. With that, I should be able to see what you're referring to being I have a smorgasbord here.. I just haven't been paying attention apparently, but will start doing so. Dang, and I was really digging the Firma 160, LOL. Sometimes not knowing is bliss, but in this case I'd really rather not be ruining batteries prematurely. Thanks guys.
Its not a huge problem or anything, I'm just picky. It annoys me personally when my LVC kicks in at 3.3V/C one time and 3.6V/C another
If it runs a high dollar pack like SMC down to the point of damage (or potentially) I am concerned. I have not seen anything that caused me concerns as of yet from either of the Firma 160's, but I'll try and watch for variances. These 8s rigs need at least 8ah to get a decent run time out of them, well my idea of decent run time. This of course is affected by quality of the batteries as much as anything else. I have a pair of 6.5ah that I only use in the X, though I did run them in the K8 once, I know the K8 is pulling down more amps with the bigger motor and heavier vehicle weight so I try not to use "questionable" batts in it. They're Sypom brand, $60 for the pair from amazon over a year ago. Junk to some perhaps, but I've had plenty of good times from them.
Somewhere, I missed if you got this cogging issue fixed. I have similar gear set up, only 24/35 Mod 1.5. Initially for your cogging issue, I would have went down to a 19t pinion to start with. Well, I had the Max 6 but it would overheat with this set up, so a Max5 G2 fixed that. I don't have something set right as mine will not do standing back flips either but she sure is a ripper otherwise!
If your rig doesn't do standing backflips then your gear ratio is too tall. Drop pinion sizes until it will do them.
Hey brother, so yeah this is my first xmaxx and I was already heavy into rc hobby. Basically went bought new xmaxx ultimate and didn't even run it once, immediately stripped the whole truck down did treal upper front and rear bulkheads to mount up to the front and rear aluminum trx diff covers. M2c flex drive shaft, m2c chassis brace bar similar to your pnw brace, then carbon fiber battery tray conversion, all the captured hinge pins, bowhouse motor mount with new max6 and 5690 motor 1250kv, hyperflow dual 4s fans in the nice hyperflow 3d printed housing mount system, fly sky gyro reciever matched to my fly sky nb4+ radio, vitavon pinion and spur 20/35 mod 1.5 with the vitavon shaft with the extra big bearing on the end. And took it out for few rips although it is fast at 50-55 mph I felt like it hesitated on low end torque. Definitely cogged at a stand still when I tap full throttle. I was under impression that I could do standing backflips with all this power and mods. Batteries are innovation rc 10,000 mah 100c by cnhl and brand new on 8s. Freaking kevin talbot gets a stock xmaxx with only a max6 esc to do standing backflips on stock motor! Wtf am I missing here? So since that result a week ago I did purchase a brand new max5 esc and a new 56118 motor 1100kv. Was going to swap that into my xmaxx and see how it handles, what do you think?
What you're missing is the fact that Talbot (according to what you're saying, I haven't seen the video) is running stock gearing which is much shorter than what you're running. Stock gear ratio is 3.00:1, so run an 11T/12T pinion and I bet you can do standing backflips too.
Hmm, this has got me thinking you may be correct sir. That would make more sense as to how he's doing standing back flips. 3 to 1 ratio is stock? I need to figure out what my ratio is. Any recommendations on good calculators to determine ratio and max speed ect....?
I explain how to calculate all your gear ratio stuff here:
