Coelacanth

iTrader: (2)

Not to take the O.P. lightly, but this certainly isn't the first time someone got the idea to make the world's fastest/best/whatever without fully appreciating the myriad technicalities required to get there. It's not just a matter of slapping the biggest motor/ESC one can find in an RC chassis. People who've actually built cars that challenged for the "fastest" title have spent thousands of dollars--if not tens of thousands or more--to do it properly.

crazyslashman

yes i understand
but im going to try to make with the actual slash chassis and same design
but thankyou anyway for the reply

crazyslashman

so yeah
the snowplow front wing works but i need a new idea that works better
i also have a new uncut bodie

burnineyes

iTrader: (17)

Ah yes, but where did every one of them get started? They got started by slapping way too big of a motor in a car! Its not that expensive if you are willing to put in some elbow grease and think outside of the box. He said worlds fastest Slash, so I doubt he is aiming for Nick Case in this project. I say go for it and be careful! That thing will do some serious damage at stock speeds, scary to think of it losing control and causing serious harm at the outrageous speeds you are likely to see.

crazyslashman

thanks burn
here let me get some links up to what im going to get

crazyslashman

http://www.hobbypartz.com/96m214-3674-2800kv-6t.html
thats the motor
i have a 100 amp esc

fredswain

iTrader: (1)

Youtube has several videos of 2WD Slash's topping 60 mph with at least one over70. There is a video of a 4wd Slash topping 90 mph and that was with a 6S Lipo!

crazyslashman

yupp this one needs to be fast
thanks for the reply
does anyone have any suggestions on what i should put in it?

fredswain

iTrader: (1)

You are wanting to run a big motor for a 1/8 scale car. However look at the kv. It's low. This means that all that power will be at low rpms. More power at lower rpms is higher torque and torque is what kills gearboxes. You're going to tear it apart. You'd be better off using a 1/10 scale motor with a high kv rating. More rpms with the same amount of power is less torque on the gearbox which means less stress on the gears. Strange but true.

crazyslashman

i have a 4300 540 size
what should i go for like a 7800?

fredswain

iTrader: (1)

Instead of trying to just go at this all at once, you need to work your way up to it. Run what you've got as it is and clock the speed. Then change the gearing, repeat. Go up to a 3s or 4s Lipo if your esc can handle it and record the speed. Change the motor, etc. You get the idea. You'll learn alot this way and may find a bunch of problems that you weren't away of. If you go all out at once you'll never know if your combo was truly good or not since you've got nothing to base it off of. Real land speed record vehicles get there in steps through testing and you should too.

crazyslashman

thank you
my esc does 3s but not 4
i have 2 2s batteries i could run in series so i wouldnt have to buy batteries
i could go all the way up to 5s
what esc would you recomend that will do up to 4-6s?

tsan

It doesn't work that way... two 2s packs run in parallel is still going to be 2s. (the 's' stands for series) You're just going to double your capacity.
Basically, that's just going to give you more run time. (something that shouldn't be of much concern when going for top speed) Running a 3s and 2 s in parallel won't give you any more juice than a 3s on it's own. Again, it would just add to your run time. (although, I'm not sure if combining a 2s and 3s together will cause any weirdness)

fredswain

iTrader: (1)

If he wires them in series he'd be fine.

crazyslashman

sorry meant series