TA-05 Gearing Question

[Formula Mazda]

I need to know what people are using for gears. I am using the stock 20/70. After this weekend, i was killed on the straight away speed. I was told that a 4:3 ratio is optimum. I was also told to run a 34T pinion.

I have a TA-05 V2. it has the stock 16/36 drive and 20/70. How do i find my ratio?

What MFG are most using? I hear that most have gone from 48P to 68P.

I want to run the most comon gear set so that spares are easy to come by.

[Wayne_NZ]

To get you Ratio first u need to work out your Internal Ratio
I think the TA05 V2 has a 37T pulleys an 18T center pulley
Which will give you 2.055 (Same as the TRF 416)

So now you got you Internal Ratio you can work out spur an pinon EG
Spur Divided By Pinion Time Internal Ratio

So with your 20/70 combo it would be 7.19

Since people normally go 64Pitch the spur an pinion you would want is
90T Spur and 43T pinion that will give you a Flat 4.30 Ratio

Ill Attach a file so you go over the Ratio its for a TRF 416 but the TA05V2 has the same internal ratio as the 416

Hope this helps

Also the older TA05 Was 36T pulleys an 16T Center pulley Which will give you 2.25 internal ratio

[akuntze]

To find the ratio, you do (number of teeth on spur/number of teeth on pinion) x 2.055. The 2.055 represents the internal drive ratio of the car. This equation can be found on page 12 of the manual as well.

So your current gear ratio would be (70/20) = 3.5 x 2.055 = 7.1925. To get 4.3 gear ratio you would need a 34t pinion.

If you want to switch to the 64p or in Tamiya terms, 0.4 module gear, you will need to buy the optional 105t Tamiya spur, found here: http://www.tamiyausa.com/product/item.php?product-id=53857

If you use this spur, you will need a 51t pinion. In you get the Tamiya 105t spur, the Tamiya pinion set you need would be: http://www.tamiyausa.com/product/item.php?product-id=53425

In the Tamiya races, it seems most people are using Tamiya gears as well.

[akuntze]

Here is what it looks like in the manual.

[Rescue]

Well you didn't say what motor you are using.

I run GT2 In TCS Canada so we use black can's but I run a 105Tspur 64p with a pinion of 36 for a 5.99 FDR

if you are racing indoors go 64p and if you race outdoors on ashpalt switch to 48p so you can have the bigger teeth and those little stones wont chew up your gears.

[Raman70]

Here is what it looks like in the manual.

Hi Akuntze,

I was planning on running my 416 in 17.5 stock class with a GTB and need a 3.5 FDR. Does Tamiya make a 0,4 module smaller than 105?

Having owned TA04s, I own a lot of 0,4 pitch pinions

[akuntze]

No Tamiya only makes the 105t spur, but there are plenty of companies like Xenon and Precision RC who make generic spur gears for cars like the 416. Check out SpeedTech R/C: http://www.speedtechrc.com/store/ebproduct.asp?catmainid=392

[Raman70]

These should work right?

http://www.amainhobbies.com/product_info.php/products_id/33516/n/Precision-Racing-Systems-64P-Pro-Lite-Spur-Gear-72T

[akuntze]

Those should work fine!

[rdibley]

So, is 4:3 a good gear ratio for the TA-05 running a GT3 setup?

Other questions were answered, but not the question of the "optimal" ratio.

Thanks

[akuntze]

Each track and each motor is different so there is no "optimal" gear ratio that will work for everyone. That ratio is a good starting point, and just go out to test and see if you need to gear taller or shorter depending on the track, temps, and motor you are running. That's by far the best thing you can do.

[Grizzbob]

So, is 4:3 a good gear ratio for the TA-05 running a GT3 setup?

Other questions were answered, but not the question of the "optimal" ratio.

Thanks

That's because there is no single "optimal" gear ratio, what's right for one track & one particular motor(even of the same type frequently) is not neccessarily right for another track or motor. Honestly, the best thing to do is to ask the local racers where you want to run, as they will have done a LOT more testing specific to that place, & will be MUCH better qualified to help you than someone over the internet who's never raced there....:Tamiya1: