Baja Champ Pinion

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Paul Malam - 12 Dec 2003 11:05 GMT

Hi there, I have a ballraced Baja Champ, with an MTroniks 20 turn ESC and a
Tamiya Sport Tuned 540 motor (23 turn).

Wanting some advice on changing the pinion for better performance. Would
like more speed, but dont want high battery drain.

I think the TL01B chassis only has three pre drilled settings fro motor, so
think I am limited.

Question is, I think a 19t pinion will fit, but what benefits will it show?

Any other help much appreciated

Thanks

PaulJMUK

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dg - 12 Dec 2003 17:09 GMT

How many teeth does the pinion have now?

--Dan

> Hi there, I have a ballraced Baja Champ, with an MTroniks 20 turn ESC and a
> Tamiya Sport Tuned 540 motor (23 turn).
[quoted text clipped - 12 lines]
>
> PaulJMUK

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Paul Malam - 12 Dec 2003 19:23 GMT

Think its 25 or 27

Will dropping to say a 19 cause fast battery drain?

> How many teeth does the pinion have now?
>
[quoted text clipped - 19 lines]
> >
> > PaulJMUK

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Jamie Garofalo - 12 Dec 2003 19:05 GMT

I'm not 100% sure if it will fit. I used to have a Tamiya Blazing Star
buggy and I think the smallest was a 20.

A smaller pinion is going to get you off the line quicker and reduce
top end slightly. Then again, it might be a HUGE difference if your
jumping 2-3 teeth at a time.

NOTE: Tamiya cars use a "metric" pinion. A standard 48P or 32P will
not work and cause the drive train to bind and click.

-Jamie

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Mike - 12 Dec 2003 23:20 GMT

Hi Paul,

I also have a Baja Champ, I purchased it in September of this year. My
car came standard with a 19T pinion gear... I think the other two
options (being limited by the mounting system) are a 21t and 23t
pinions. I replaced my motor with a Trinity P2K2 and (for now) kept
the 19t pinion... performance definitely improved.

My other mods to this car are: Futaba 230(?) ESC, full ball bearings,
and I have a set of Tamiya mini-shocks on order. (These are
oil-filled, as opposed to the 'friction' type that the kit comes with.

Anyway, I'm pretty sure that a 19T pinion is standard, I might go up
to either the 21 or 23 (probably the 23)

Mike

> Hi there, I have a ballraced Baja Champ, with an MTroniks 20 turn ESC and a
> Tamiya Sport Tuned 540 motor (23 turn).
[quoted text clipped - 12 lines]
>
> PaulJMUK

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Paul Malam - 13 Dec 2003 09:15 GMT

Sounds like I've been mistaken. I thought going down in pinion size
increased performance.

Presume mine has a 19t too

> Hi Paul,
>
[quoted text clipped - 29 lines]
> >
> > PaulJMUK

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!bungle - 14 Dec 2003 01:06 GMT

I find this way to remember the relationship between pinion/spur size and
performance helps me:

As you increase the size difference between the pinion and spur gears your
top speed will decrease but your low-end acceleration will improve.

As you decrease the size difference between the pinion and spur gears your
top speed will increase but your low-end acceleration will worsen.

Think of the front chainring and rear sprocket on a mountain bike. You
accelerate best with a large chainring and a small sprocket, but you run out
of breath easily. If you shift until your sprocket is closer to the same
size as your chainring you will be able to reach much higher speeds, but if
you try to accelerate in that gear from a standstill you will barely move!

HTH,

Signature

Dirk
(aka "!bungle")
'96 LS650
(aka "Rhino")

"Well, you may be a lover but you ain't no d-d-dancer"

> Sounds like I've been mistaken. I thought going down in pinion size
> increased performance.

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Model Forum / Radio Controlled / Land Models / December 2003

Baja Champ Pinion