Potential swap - Speed Passion 10.5t brushless motor for 13.5t?

[ThunderDragonCy]

Finally coming to the conclusion that the 10.5t brushless might be a bit much for me and the old Thunder Dragon. It's a Speed Passion motor with the tabs that push into the motor so to avoid any soldering, does anyone have a 13.5t Speed Passion motor which they would like a bit more punch and would like to swap? 

Cheers!

[TwistedxSlayer]

Ive got a Speed Passion 17.5t if your interested?

[ThunderDragonCy]

On 6/14/2017 at 6:40 AM, TwistedxSlayer said:

Ive got a Speed Passion 17.5t if your interested?

Thanks, but don't think I want to back it off quite that much. I run a tble02s esc so have no options to up the punch on a less pokey motor.

[Jonathon Gillham]

36 minutes ago, ThunderDragonCy said:

Thanks, but don't think I want to back it off quite that much. I run a tble02s esc so have no options to up the punch on a less pokey motor.

Is there room for a bigger pinion? If you can get the FDR right then the 17.5T will be plenty fast without boost or turbo. My 17.5T blinky cars are as quick as the TT02B with a 13.5T because I only have a 19T pinion in the TT02B with standard spur but run around 30T pinion in the other cars with similar size spur.

17.5T can run FDR around 5.5 - 6, the 13.5T will be around 7.5 - 8 I think but most Tamiya seem to be about 10, which suggest around 8.5T - 10.5T motor

[Peter_B]

Sorry to go off topic but @Jonathon Gillham where does the info about what FDR suits what motor come from?

[Jonathon Gillham]

Just now, Peter_B said:

Sorry to go off topic but @Jonathon Gillham where does the info about what FDR suits what motor come from?

Someone had a link to a calculator but sorry can't remember who. I have looked into it for racing so from talking to other racers or shops, and some car manuals show it as well. Here in New Zealand classes are 17.5T blinky or mod (open motor and boost etc allowed) for outdoor or 8.5T blinky for indoor hence why i know the 17.5T and 8.5T. 10.5T could probably handle FDR around 8.5-9, I actually had that wrong, thr Tamiyas FDR would suit 8.5T or a bit below

Lower FDR is higher gearing, and higher turn motor has more torque hence lower FDR. This should probably be in another thread rather than for sale/swap! Sorry @ThunderDragonCy!

[ThunderDragonCy]

34 minutes ago, Jonathon Gillham said:

Is there room for a bigger pinion? If you can get the FDR right then the 17.5T will be plenty fast without boost or turbo. My 17.5T blinky cars are as quick as the TT02B with a 13.5T because I only have a 19T pinion in the TT02B with standard spur but run around 30T pinion in the other cars with similar size spur.

17.5T can run FDR around 5.5 - 6, the 13.5T will be around 7.5 - 8 I think but most Tamiya seem to be about 10, which suggest around 8.5T - 10.5T motor

I can go up to a 17t pinion on the Thunder Dragon. Running 14t at the moment. Not sure what size the spur gear or diff are.

[Jonathon Gillham]

On 2017-6-15 at 10:48 PM, ThunderDragonCy said:

I can go up to a 17t pinion on the Thunder Dragon. Running 14t at the moment. Not sure what size the spur gear or diff are.

I see you swapped for the 17.5T, have you tried it yet? Hopefully can get the gearing to work...at least you could enter vintage races down here, obviously worth a trip to NZ just for that!

[ThunderDragonCy]

Motor should be arriving today. Based on some rough calcs max rpm should be similar or a little higher than my 13.5t running 7.2 as I will be running 8.4 on the Thunder Dragon. That will be fine if it works out.

[ThunderDragonCy]

Ran it tonight. Absolutely spot on! Same gearing and everything. Reckon it's a bit quicker on 8.4 than my DT03 13.5 on 7.2 which is perfect. No thermal issues at all despite being very warm evening. Happy days!

[TwistedxSlayer]

Very glad that has turned up. I'll happy deal with your good self again :-). Trusted member :-)

[Dojo Dave]

On 6/15/2017 at 6:24 AM, Jonathon Gillham said:

Someone had a link to a calculator but sorry can't remember who. I have looked into it for racing so from talking to other racers or shops, and some car manuals show it as well. Here in New Zealand classes are 17.5T blinky or mod (open motor and boost etc allowed) for outdoor or 8.5T blinky for indoor hence why i know the 17.5T and 8.5T. 10.5T could probably handle FDR around 8.5-9, I actually had that wrong, thr Tamiyas FDR would suit 8.5T or a bit below

Lower FDR is higher gearing, and higher turn motor has more torque hence lower FDR. This should probably be in another thread rather than for sale/swap! Sorry @ThunderDragonCy!

I think i have it saved somewhere. I look