Max Torque Mod
 

I just completed a mod that I will call "MAX TORQUE". This mod is to raise the current limit to the motor. There are two resistors (R2, R21) that are on the bases of the transistors that drive the motor. The stock ones on my Honda Civic where 220 ohm. I replaced these with 100 ohm resistors to increase the maximum torque available to the motor. It now takes off faster and doesn't get stuck as easy. Give it a try!

Hi Tony,

A few questions for you...

1. Where'd you get the 100ohm resistors?
2. Do you have a clearer picture, the current one is blurry?

thanks.

The resistors that need to be changed are marked in this picture.
I don't believe you can get SMD (Surface Mount) resistors at radio shack, you would have to find an electronic supply store. They are very inexpensive.

Alright then, where'd you get YOUR 100ohm resistors? Do you have a link to an Electronics Store?

thanks.

any drawbacks noticed so far? shorter run times? More motor heat?
Thanks

From my experiments with those resistors, I found that current continued to increase to the motor the smaller resistors I used. Actually, I shorted them and I didn't notice any negative side effects (other than only 4 minute run time) and I would have left it that way but I replaced the transistors with mosfets. The voltage from the IC dropped when I shorted the resistors and hence didn't destroy the transistors. In any case, that 100ohm mod is much better than leaving the 220ohm resistors.

I got my resistors from an old hard drive.

Tony, you mind if I stick this in the FAQ?? I'll wait until a few more people try it before it goes in though, we need some more results.

That would be cool.
 

Sounds good to me

Alright, I'll probably try this out this weekend. I'll just jumper mine though, as putting a new resitor in goes against my philosophy of "Cheap, easy and fast".

I shall retun with pics.

http://www.markhannahsurplus.com/resistor.php

they have them, they are number RK73H2A1000FT

cost each is $0.02 and they have 3500 of them.

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http://www.electronics-plus.com/Merc...ry_Code=NT1206

They also have them, at about $0.89 each

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good luck all.

2 cents? Sheesh, that seems excessively cheap. Why not just order 50 of them then and not bother with the change?
:D

is this for a zip or a bit?

ZIP

You said that the smaller resistors you use the better the results(speedwise only). I was wondering, what if you just leave them out. Will it work still?

Thanks

If you leave them out the car won't run. If you short them out (ie 0 ohms) it will run but there may be risk of burning something out.