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TSRF question


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#1 BackAgain

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Posted 07 July 2009 - 11:09 AM

Since I don't compete in any organized racing competitions, I enjoy modifying my cars to make them go a little faster or, just to look better....to me anyway. I doubt any of my cars would make it within 20' of the scrutineers table so maybe my opening comment should be reversed.... :blink:
I have Fly cars with Slot.It motors, guides, axles and gears....Slot.It cars with NSR 30 motors, F1 wheels and tires, even a Scaley with an NSR 30 motor....it's going to get a TSRF motor when I can find one....
I have mounted a Slot.It Porsche 956 body on one of my TSRF chassis but I want to fit wider rear tires....and there lies my problem.
I tried a set of Slot.It SIPA 20 wheels and tires but the spur gear hits the track surface. The spur gear seems to be a larger diameter than the Slot.It spur gear....I haven't measured them though....

My first question is, will a Slot.It sidewinder spur and pinion set fit the TSRF or is the motor/axle center distance different?
Alternatively, are there wider wheels and tires (rubber) available for the TSRF that are a similar OD to the originals?....I do have some concern that a smaller diameter tire such as the F1 style may result in the chassis hitting the track.
Thanks....
Paul Tisdale
The problems we face today are there because the people who work for a living are outnumbered by those who vote for a living.




#2 Ramcatlarry

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Posted 07 September 2009 - 11:00 PM

The TSRF gears are 64 pitch common in the USA. You CAN get different ratios that what is offered by checking out the drag gear selection from Sonic and Slick-7. Drag pinions are thinner and lighter also. All 64 pitch in these groups change root diameter with the number of teeth, so if you go up a tooth on the pinion, you go down a tooth oh the spur. This is not exact among the brands and you may be able to get a unique ration with different brands. Fit and backlash are critical.

Since the axles are 3/32" tires can be custom made from a wide variety of 1/24 scale tires if you are running on wood tracks. If running on plastic, stick with silicone type, different rims from SCX and Slot-it among others are 3/32". Some 1/32 rims are oversize 2.5mm (0.098").

Larry D. Kelley, MA
retired raceway owner... (for now)
race directing around Chicago-land

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60+ year pin Racing rail/slot cars in America


#3 TSR

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Posted 08 September 2009 - 09:28 AM

Also you will need to remove a small amount of plastic at the very bottom of the right-side radiator vent on the body to clear the pinion. :)





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