miNI sCaLe RAciNg saTurDaY!

**Gary** · #1 07-18-2006, 05:30 PM

Got all this wiring figgered out on my M18. Speedo set up, batteries are cycling now, motor broken in, just a couple of things left to do, and the

" Biff Mobile "

will be ready to race!

Look out Trey!

**madf1man** · #2 07-19-2006, 06:28 AM

I ain,t to skeered!! See ya then

**Gary** · #3 07-19-2006, 06:21 PM

Trey, you use a Quasar right? What settings are you using? Especially the cut off for charging.

Well, the car is allmost ready. The M18 is uncharted water for me and was a little tough getting wired up. Not alot of room. LOL Took my first test spin and now realize the diffs are way too loose. I got alot done in the last two days, Ill deal with that tomarrow.

**madf1man** · #4 07-19-2006, 08:06 PM

Charge rate anywhere from 2 to 4 amps depending. The lowest peak detect there is, 3 mv I think it is. 5 cell setting of course and what ever your capacity is 1100 to 1400. Discharge at maybe 2 amps or a little less.

**justinspeed79** · #5 07-19-2006, 10:18 PM

0.9 volts per cell is a good cut-off voltage for 2/3a NIMH cells. You can go down to 0.8 or even 0.7 if you want to squeeze some more run-time out of them, but it will reduce battery life. I alway discharge at a higher amp than I charge. I usually charge at 1C, and discharge at 2C. So for 1100mah cells I charge at 1.1 amps, and discharge at 2.2 amps. Sometimes if I am in a hurry I will up it to a 1.5C rate for charging and a 3C rate for dis-charging, but I alway keep the rate proportionate to the way I cycle my packs. Using a higher discharge rate will increase the power output of the cells, but decrease run time. I know alot of people like to run higher amps when charging and dis-charging, but I find that even hi-performance batteries tend to overheat at higher amps. I use 6mv per cell peak sensitivity.

That's how I do it.

**LoneSA_MiniZ** · #6 07-20-2006, 09:47 AM

Yes I heard also that 1c was better for the smaller NiMh cells, keeps them new longer

Have fun racing!!

**madf1man** · #7 07-20-2006, 12:39 PM

The batts we,re using seem to take the higher charge rates just fine. Its not like we're burning up an 80 dollar race pack if they do cook!!! Thank goodness

**LoneSA_MiniZ** · #8 07-20-2006, 03:44 PM

I had a customer pop a LiPo at 1.5C! It was a cheaper brand, and his son put it on the charger without knowing the dangers of LiPo's. So thank goodness NiMh does not make nasty flames and hissing sounds. Altough the bubbling sound when you vent a pack is pretty cool!

**Gary** · #9 07-20-2006, 04:08 PM

Christian said 5 1/2 amps for charging. I think thats too much for budget racers who wanna save their batteries for a long time. They warmed up quick. LOL

**LoneSA_MiniZ** · #10 07-20-2006, 04:41 PM

LOL, way too much for tiny NiMh's. Sounds like sprite!