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#1 Eddie Fleming

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Posted 28 June 2020 - 03:25 PM

What is the status of Pro Slot? The link i had for the gear chart has not worked for some time and I am not finding then on the net. Some motors seem to be available but are they still in business?  


Eddie Fleming




#2 MG Brown

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Posted 28 June 2020 - 03:36 PM

Nothing can be depended to be on-line forever or at the same location.

 

Save a copy of this. Storage is cheap.

 

http://www.proslot.com/gearchart.php

 

Screen Shot 2020-06-28 at 3.35.59 PM.png


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#3 Eddie Fleming

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Posted 28 June 2020 - 03:45 PM

Thanks, MG, for the link that works.

 

I have that and on paper for a few tire sizes, but am still wondering about the company. 


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Eddie Fleming

#4 James Wendel

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Posted 28 June 2020 - 03:48 PM

Their website appears untouched for two years. Perhaps you could give them a call on Monday.

 

http://proslot.com/


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#5 Pablo

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Posted 28 June 2020 - 04:38 PM

This works fine for me Eddie:

 

http://proslot.com/gearchart.php
 

Also this:

 

http://proslot.com/


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#6 MG Brown

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Posted 28 June 2020 - 04:59 PM

Their website appears untouched for two years. Perhaps you could give them a call on Monday.

 
The catalog was updated 2/19.
 
Screen Shot 2020-06-28 at 4.57.59 PM.png

“A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.” - Douglas Adams


#7 Shruska55

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Posted 28 June 2020 - 08:01 PM

Living in an iffy world of rural TX cell and internet reliability, it would be slick if this was downloadable to use offline.

 

Or, if some programming whiz could create a mobile app, I suspect I wouldn't be the only one to have it on my phone.


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#8 Pablo

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Posted 28 June 2020 - 09:17 PM

:shok:  :o 


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#9 Ramcatlarry

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Posted 28 June 2020 - 09:54 PM

Links all work for me. A race proxy series is having their first race at Pro Slot in August (Vetro Jaildoor/Retro Can-Am).

Larry D. Kelley, MA
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#10 mreibman

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Posted 29 June 2020 - 08:12 AM

Living in an iffy world of rural TX cell and internet reliability, it would be slick if this was downloadable to use offline.
 
Or, if some programming whiz could create a mobile app, I suspect I wouldn't be the only one to have it on my phone.


If you use Excel mobile app, you should be able to set this up. The gear ratio is gear teeth / pinion teeth, and the final drive ratio is (gear teeth/pinion teeth)/tire diameter.
 
For instance, 10-25, would be 2.50 gear ratio, but 3.27 final drive ratio with .765" tires.
 
I would be more than happy to modify my gear ratio sheet with the calculation and post it, but it's not worth writing an app for this. (I don't write apps anyway).

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#11 Pablo

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Posted 29 June 2020 - 08:49 AM

This is really tripping me out.
 
- Everything on the Internet is downloadable. Look at post #2.
 
- Formula for final drive ratio:
Gear ratio divided by rear wheel OD.
Example: .750" wheels, 13/36 gears
36/13 = 2.769
2.769/.75 = 3.692 final drive ratio
 
I find the Pro Slot chart very handy, but do you really need an app for a simple math equation?  :o
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#12 Dallas Racer

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Posted 29 June 2020 - 10:48 AM

I've never had any idea what gear or drive ratio I'm running. On any slot car I've ever owned. I just run whatever makes the car go the fastest without overheating the motor. And I start with whatever everyone else is running and tweak from there. Usually I end up running what everyone else is running.


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#13 Pablo

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Posted 29 June 2020 - 02:32 PM

I do something similar, Phil. I just ask Bluecars what pinion he's running (we run about the same size wheel) and go from there. He won't lie to me because he knows he will always outdrive me anyway. And I'm fine with that.

 

There is always the Pablo Flexi Gearing theory for throwaway motors - "Increase pinion size tooth by tooth until you cook a motor. Then back off one tooth."  :D  :good:

 

Where FDR comes in handy is building custom cars with different wheel sizes. Example, JK Hawk Retro runs good in Retro racing at about 9/28 with .820" wheels = FDR 3.79

 

If I put one in a car with .750" wheels, I'd use maybe a 9/26 = 2.9 / .75 = 3.85, which is close enough.


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#14 Zach Holley

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Posted 29 June 2020 - 03:08 PM

What is the ideal gear ratio you would be shooting for? 4:1?



#15 Rob Voska

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Posted 29 June 2020 - 04:59 PM

Spoke to John about a month ago. Reduced hours but open.



#16 MG Brown

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Posted 29 June 2020 - 05:11 PM

For those who care:

 

Attached File  PX Gear Ratio Chart.xlsx   21.34KB   39 downloads


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“A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.” - Douglas Adams


#17 Shruska55

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Posted 29 June 2020 - 05:50 PM

For those who care:

 

attachicon.gifPX Gear Ratio Chart.xlsx

I care...Thank you for posting this,


Scott Hruska
East Texas





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