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Old 08-11-2003, 05:55 PM   #1
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Default ESC improve performance??

Will a better ESC improve car/ motor performance?

I used to hav a sanwa ESC and it was broken and I changed to Futaba mc330... my car seems go faster and smoother... Had compared with my fren's car... we r using the same car, gear setting... except the ESC, he is still using the sanwa one... I can easily over take his car in a straight road although his car is 1.5-2 feet in front of mine... Will a better ESC cause so big diff??
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Old 08-11-2003, 08:04 PM   #2
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yes a good speedo is as good as a clean motor and good battary. if you set it up right it will make a bad car drive well or a good car drive like junk.

I try to use the best speedo out there i like novak and lrp i run both when i set my speedo up if the track is slick i start at a slow setting and move up untill it starts gitting out of control and its set

on a tight track i start off at high untill it looks slow and i move it up 10% till its to fast again and then after a few laps it smooths out and im on target and its all to do with my driving.

a good setting on a speedo will save motors and battary and wear and trear on car also.
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Old 08-13-2003, 12:49 AM   #3
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Default Re: ESC improve performance??

Quote:
Originally posted by blixelX
Will a better ESC improve car/ motor performance?

I used to hav a sanwa ESC and it was broken and I changed to Futaba mc330... my car seems go faster and smoother... Had compared with my fren's car... we r using the same car, gear setting... except the ESC, he is still using the sanwa one... I can easily over take his car in a straight road although his car is 1.5-2 feet in front of mine... Will a better ESC cause so big diff??
anybody care to explain how the above happen?

i maen i dont quite understand how Car A is faster than Car B when everything is the same except the ESC

when you floor both cars to full throttle both cars should be just as fast.. how can one be faster than the other just because of the ESC?

if anybody can enlighten me i am willing to learn, thank you.
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Old 08-13-2003, 01:57 AM   #4
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Good ESCs have lower resistance in their FETs (transistors).
Resistance makes the FET heat up when passing current.
An ESC has a "motor rating" worked out by max current it can
carry before the FETs heats up too much.

Better (more expensive) FETs or just using more FETs (in parallel)
gives lower overall resistance... that is why ESCs rated at
"no limit" cost more than something with "20t limit".
The expensive one will have lower resistance & low turn rating.

So passing current through a cheaper ESC is like pushing water
through a tiny hosepipe... water does gets through, but slowly.
When there is "no limit", its like using a big fat fire hose!!

Even if you're only running a stock motor, a better ESC will always
outperform a cheaper ESC as it can carry more current faster.

A lousier ESC starves the motor as well as wasting battery
energy by getting its FETs hot.
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Old 08-13-2003, 07:14 AM   #5
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Quote:
Originally posted by WC
A lousier ESC starves the motor as well as wasting battery
energy by getting its FETs hot.
This is 100% true! I never would have believed it till I saw it myself. The right ESC can make all the difference in the world.

PS: To make sure my ESC is always setup correctly, I always re-program it at the start of each race day.
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Old 08-13-2003, 07:58 AM   #6
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What is the minimum drive frequency possible on the GT7? If you set it on 1 KHz, will it damage a stock motor?

I read that the smaller the drive frequency the more punch you have, is it true?
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Old 08-14-2003, 03:32 PM   #7
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Also just because you guys bought the same gear doesnt mean you got the same gear. If you took all the Monster stock motors trinity makes and ran them head to head you would see a pretty wide range in preformance from the best to the worst. Same with batteries and such. Even the charger used to charge each battery will make a difference, and if its a cheap charger the quality of the charge could varry greatly from charge to charge. Not to say that that car A can be 2x faster than car B, especially around a closed circuit, but in a straight line acceleration test the diference between the motors and batteries would become more apearent. Another factor is maintence. The difference is maintence on each car is probably the biggest player. Even if you both had the same ESC that difference you described between the two cars could still be possible.

But a better ESC will definately make a difference in performance regardless of the rest of your equipment.
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Old 08-15-2003, 01:36 AM   #8
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Hi... yah, its hard to believe for some1 who is not expert (including me)... haha... but its true... the speed btw our cars r not a slight, its a big diff... we may try to ex-change our esc and try again...
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Old 08-15-2003, 01:41 AM   #9
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Out of all the variables mentioned above... yes they all affect
a car's speed on a track. They might not be big effects, but
they all do add up... especially if you're racing a stock class.
(But hit just 1 wall, and all benefit is lost.)


However there's one BIG factor that's been missed... "car building experience".

There are gods who can build any car kit and take such care to
get everything right and running smoothly, their cars will always
go faster than yours.
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Old 08-17-2003, 06:16 PM   #10
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Default Weired!!!

Hi... just some updates after we had tried many method to find out whats the really factor that cause our cars... (from first post)

my fren had borrowed an futaba 330 ESC and tried on his car, then we did a comparison again... his car seems a bit faster, but my car still can easily overtake his car...

then we tried to take out our motor and test our drivetrain... almost the same... cant see which 1 is smoother...

after that we decided to change our motor (tamiya type R)... haha... the weired thing happened... our cars hav the same speed now... same fast...

any1 hav any idea how this could be happened??
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Old 08-17-2003, 09:28 PM   #11
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So its the motor?

Speed of motor can vary a lot... fastest when newly rebuilt
and oiled, then they gradually get slower and slower
until you can't stand it anymore and go rebuild it again.

Could try rebuild both motors together... maybe ask the
hobbyshop (when they're not busy!) to show you how to
do it properly, ask LHS to sell you the needed supplies too.
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Old 08-17-2003, 10:09 PM   #12
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i think it has to do with efficiency, a high end ESC has lower resistence then the cheapter counterpart..your motor will be working at its full potential which translate into speed.
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