mixing brush types

[vegas]

Hi Monty,

I was looking at a Cahoza built motor and noticed something interesting to me. The positive brush appeared to be a Koford, and the negative brush appeared to be a Proslot. Any ideas on this? Something to do with hardness or amp draw? Thanks!

[backintheslot]

Keen observation! Is there a large visual difference?

[vegas]

If you look at where the spring pushes on the brush, they look different. The "Koford" brush has a single slit, and the "Proslot" brush has a cross on it.

[backintheslot]

You are correct! Just ran out and checked............Should of did that in the first place.:rolleyes:

[fxgeorge]

The next thing you know guys will be racing with a Carsteen in their left hand and a Third Eye in their right hand! What's this world coming to?

[[email protected].]

Vegas,

Thats a new one on me... I didn't realize anyone bought complete Cahoza motors, pricy, ya know.

In any case, you don't need to read this forum too long before you realize I use only Golddust brushes, for any motor that takes 36d size brushes. 16d to g7 and everything in between.

[thunderdome]

Cahoza has been doing this for a number years now i don't know why but i have a couple of guys at my Raceway that do it they swear by it in all motors except gp7:confused:

[z-ya]

In ho racing it is fairly common to use one silver brush and one copper carbon brush , silver on the positve side .

[neuspeed1013]

what is the benefit of all this? Does the motor run cooler? last longer? more power?

["Dub" Wade]

Very Interesting, Is there a noticeable difference? Are they mixing spring tension also? Why?

[slotcarboy]

This is very common practise in the UK and Europe
The main advantage is to even out the wear as the + wears faster also it seems to help keep the comm cleaner

[RickB]

That was a common practice amoung group/wing racers 8-10 years ago. I know one of the elite did it all the time...............

[tnttires]

I am always amazed when someone says this is better than that, when there is no way to test these 2 methods under identical conditions. You can not test on the same arm, same brushes and the same comm condition or track conditions 2 different ways at the same time. You might get an idea but never an identical comparison.
Maybe 1 time you try it with the Goldust and it has more or less amp draw than the SBF II, next time different set of brushes different size comm and it is reverse. It is not uncommon to find a set of brushes that runs too hot in a certain setup, change the brushes and it runs cool again. The next time it works the opposite.
What if we run 1 Horizonal and 1 vertical brush which should be positive or run a cut brush in the negative? How about mixing Champion, Koford, Cahoza, Kelly, Pro Slot or Camen springs?
Has anyone beat the Port Jeff Guys consistently in GP-12 or I-15 using this method? Or Beuf in C-12? Rich Curnette in GP-27? Beuf or Chubbie in Opens? I know their method produces these words during the race "I coming up on you".
Scale I don't know about, so I'll leave that to the Scale Racers.

[Martyn]

TNTTires: Utopia doesn't exist in any R&D environment. But if I follow your thought to it's logical conclusion then R&D doesn't exist either. Having said that you just eliminated any reason to test and tune a car. Basically you indicate that the results of any test are not repeatable thus unreliable indicators. This isn't a new thought. The old, "You can't measure the system without affecting the result", thinking in physics. What they don't tell you is that it applies only in the quantum field.

Tossing the top drives into the mix is tossing mud in the water. My Dad use to take money from guys shooting pool with a mop handle for a cue.

This is simple pass/fail R&D not nuclear physics. No need to quantify the result, just better or worse.

[badvader1956]

Hi Monty,

I was looking at a Cahoza built motor and noticed something interesting to me. The positive brush appeared to be a Koford, and the negative brush appeared to be a Proslot. Any ideas on this? Something to do with hardness or amp draw? Thanks!

What are you calling positive and negative on your motors? Is this the same as north and south or which is axle side north? Positive? Thanks

[Fast Freddie]

Just so you'll know the Positive brush is the front brush on a non Hemi motor.