16 replies to this topic

[Eddie Fleming]

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?  

[MG Brown]

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

 

[Eddie Fleming]

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. 

[James Wendel]

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

 

http://proslot.com/

[Pablo]

This works fine for me Eddie:

 

http://proslot.com/gearchart.php
 

Also this:

 

http://proslot.com/

[MG Brown]

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

 
The catalog was updated 2/19.
 

[Shruska55]

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.

[Pablo]

   

[Ramcatlarry]

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

[mreibman]

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).

[Pablo]

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? 

[Phil Smith]

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.

[Pablo]

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."   

 

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.

[Zach Holley]

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

[Rob Voska]

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

[MG Brown]

For those who care:

 

 PX Gear Ratio Chart.xlsx   21.34KB   116 downloads

[Shruska55]

For those who care:

 

PX Gear Ratio Chart.xlsx

I care...Thank you for posting this,