Smashrc

Need to buy new battery, want to know is shorty battery has better lap time compare to the same weight regular size battery?

0010

iTrader: (4)

All things being equal, a shorty battery will not instantly improve your lap times. If the battery can provide the same amount of burst current, have a similar discharge curve and similar weight, then the differences are in where you can place the weight.

If your car allows for either a full size or shorty layout, the shorty layout gives you the ability to move the weight around to be more advantageous to your setup and track conditions. But, you have to take advantage of that. If you don't place the weight correctly, you could actually hurt your lap times.

There is also the height of the COG to be considered. A shorty battery of the same voltage and capacity will be taller then the regular stick pack. So, do you need to move the weight forward/backward or do you need to move it lower?

gigaplex

iTrader: (2)

In what kind of car? Stock or mod? How close to the weight limit are you at? What battery do you have now? Not enough info to work with.

billdelong

iTrader: (33)

All depends on the car... back when I used to race Spec Slash, the majority of drivers ran shorty packs to get the best of both worlds, battery placement in the tray to get more rear grip or more steering to suit their needs by sliding the battery forward in the tray. There was no detectable loss of punch due to the 12T brushed motor not really drawing much power compared to modern brushless systems.


In contrast, most modern 1/10 buggies only use shorty packs, but many people will opt for LCG packs which reduce weight and also sacrifice punch. In this case it really comes down to track layout where tight technical layouts with lots of hard acceleration out of tight corners will favor a standard shorty, and a smooth high speed flow layouts will favor LCG shorty packs.


The track in my area runs 8 min mains so standard shorty is more common for 13.5 and mod to make a full main without loss of punch toward the end of the main.

Smashrc

THanks, it is using in 1/10 TC 17.5T 1350g

Roelof

Shorties are smaller and so less weight than a regular size so as mentioned, if you are at the edge of the minimum weight limit you have to add weight and that you can give a better balance if you know where to place it.

But the smaller battery has also a smaller capacity, that will be a disadvantage with the discharging curve. The more capacity the higher the voltage will be at the end of your session.

0010

iTrader: (4)

In touring car, the only advantage of the shorty battery is to move the weight around where you want it. Pretty much any modern TC will need to add weight to get to the 1350 weight limit, so the lighter battery doesn't do anything for weight reduction, it just allows you to put the weight where you want it. But, burst current and a flat discharge curve is what you want in stock, so, get the biggest low profile battery you can. You usually have to add weight to the battery side anyway, so why not let the weight help you, instead of literally being dead weight.

Even with an 8000mah battery, you will probably still have to add weight to get to the minimum, especially if you run a lightweight body.