Tb-03 fdr

[motorman29]

I have a Ballistic 17.5 and they sugest a 4.0 FDR, my current ratio is 64/22 x 2.438 = 7.09.
What pitch gears do I need, 48 or what? and are my calculations correct?
Thank you!

[motorman29]

If anyone knows the transmission ratio for the tb-03 please let me know, I can't find it listed anywhere.

[akuntze]

This is located on page 17 in the upper left hand corner of the instruction manual. To get the FDR, the equation is (Spur/Pinion) x 2.438 and that will give you your gear radio. The internal ratio (IDR) is 2.438.

See the attached image for the gearing information from the manual.

[motorman29]

Thank you, looked everywhere but the manual :bangin:

[motorman29]

This is located on page 17 in the upper left hand corner of the instruction manual. To get the FDR, the equation is (Spur/Pinion) x 2.438 and that will give you your gear radio. The internal ratio (IDR) is 2.438.

See the attached image for the gearing information from the manual.

Why can't I open the attached image?

[mtaddei]

according same post in other forum it seems that somebody is using a spur 78 tooth/pitch 64 and pinion up to 53 tooth.
I'm going to order a spur of 88 tooth, and using a 51 tooth pinion i'll be able to obtain 4,20 fdr, still to short comparing to other guys that at my local club track are racing with a fdr 3.5 with 17,5T motor :(

[mtaddei]

One question for Akuntze, is possible modify the IDR?, i mean can we reduce such orrible idr of 2,438 to 1,80 or something like that?

Tnks
Max

[mtaddei]

One question for Akuntze, is possible modify the IDR?, i mean can we reduce such orrible idr of 2,438 to 1,80 or something like that?

Tnks
Max

Is Super moderator reading our posts?

[akuntze]

The IDR is fixed with the ring and pinion gears. You can only change your gear ratio with the pinion and spur, but are unable to change the IDR.