runtimes and settings for optimum racing

[johnnygibbon]

ok so i been experimenting with the vorza its esc with castle link and its batteries.to be honest it seems a little slow on 4 cell- especially when compared to my 4wd sc truck ( hobao hyper10sc)witch its nuts on 3 or 4 cell
i no that runtimes of 10 min are needed for semis at 8th meetings wich is no problem on 4 or 6 cell
but its the 20 min finals i wonder about- or is a battery change vrequired /allowed in the pits
i am running 17 tooth pinion wich has improved the pitiful top end but it still tops out on the straight a t our local 10th track. so thinking of switching to a 19 or 20 tooth. on 4 cell that is....
i have a castle link for the esc and have noticed a lot of timing adjustments can be done tweaked these up very slightly and its much better but still new to 8th so dont want to mess up settings before i race.
basically i am wondering what you guys run and how you go about setting em up for racing rather than bashing
also i am gonna make a 5 cell battery that should be ace .
any advice is well appreciated either on batteries pinions or esc setup.
really looking forward to racing 8th. just need a litle help to get moving.
cheers guys:thumbsup:

[DCM]

what Kv motor are you running?

[lgbzone]

Hi

I'll try to help as much as i can, i've been racing my vorza since march.

I agree; 4S just doesn't have the top end speed/rpm for a good 1/8 track, at least not the tracks i race at.

I'm not an electrician but my understanding is that the electric system needs current, a combination of volts and amps, therefore a higher voltage battery will last a little longer than a lower voltage battery of the same capacity. i.e a 6S 5000 mah battery will last longer than a 4S 5000 mah battery because less amperage is used due to there being more volts.

I primarily race mine using 2 * 3S 3700 batteries, because i have lots of them, a couple of things i found out was that like this the vorza is far too powerful, so limiting the travel of the throttle on the transmitter made it far more controllable, and the batteries will last longer. also in the esc i set the punch control to about 75 or 80 percent, now instead of spinning the wheels like made and wasting the battery, the car accelerates very fast in a controlled manner. i also understand that changing the 'motor timing' in the esc from normal (10%) down to low (0%) will save power at the expense of performance, as the vorza is too powerful that shouldn't be a problem but i've never tried it. i have tried using expo on the throttle instead of punch control in the esc, although i do still use a little expo; i prefer using punch control as the trigger travel stays linear to acceleration, also expo wouldn't save power.

i have had 20 minutes like this on an astro track, on dirt i always make the 15 minute final, the other week i lasted 18 minutes of a 20 minute final at pendle, however i don't qualify at the front of the A final, a good A finalist ran my car recently at changed the battery after 13/14 minutes.

i agree 5S is the way to go, remove the limitations of the throttle travel and you have the voltage to out run most, if not all, cars on the track (with stock gearing). also because this would be smaller and lighter than the 6S, you could use a higher capacity such as 5000. i saw an A finalist do a full 20 minute final using 5S 5000 batteries.

I personally wouldn't gear higher than stock, according to the manual, if you do you risk high temps which should be monitored, something i'd rather not have to think about.

I do have some higher capacity 4S and 5S batteries, but only one set of each so i don't really use them, i'd stick with sets of batteries that are the same, otherwise you would need to keep changing the suspension setup of the car depending on which batteries you were using (different weight and placement).

when it comes to getting new batteries i'll be getting 5S with a decent capacity.

DCM; the stock vorza motor is 2200kv

HTH

[johnnygibbon]

thanks igbzone that was spot on i have a few lipos to experiment with now so will post when i work out runtimes with differant pinion sizes. got 15 - 20 so got some messing to do
can gearing up sometimes help runtimes. as the motor is not flat out as much
it has helped in my 1/10th before.
but it sounds like i should manage ok with what batts i got.