Gear Ratio Enquiry

If I use

- LRP SXX V2(Setting: 0-3-2-0) with 3.7V Lipo
- SP 3.5R Motor
- Pinion Gear 20 with Spur Gear 90
- Rear Tyre Diameter 43mm

Do u think the Gear Ratio & ESC setting are too aggressive?

Thanks All !!

Your rollout is around 30, it is normal.
Rollout = wheel diameter x 3.14 x pinion gear no. / spur gear no.
For rollout no. from 30 to 35 is also acceptable, but it really depent on the setting of your esc , the track layout and also your driving style............

回復 billy54321 的帖子

Thanks a lot !!

Tried 35mm at TRC seems to work quite good with LRP 3.5T + 12.25mm rotor.  But must use Turbo as it will be quite slow on the straight without it....  BTW: Using HW 1S ESC and I set my turbo slop to almost highest and turbo timing to around mid level.  Still testing it now.

rollout 30 is fine, but you can try to increase turbo to get faster straight line speed

1cell 3.5T 如同跑stock.....LRP 無Turbo包你輸3條街...

LRP 用 boost (setting 1,3,5,0) is ok

pcm118 發表於 2011-5-30 00:19

                               
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LRP 用 boost (setting 1,3,5,0) is ok

一定吾夠HobbyWing off 曬boost + max. turbo 快!!!

回復 Tinng 的帖子

yes, took the LRP out and replace it with HW 1S.  Huge different.  Especially with new 3.0 firmware.

jf813 發表於 2011-5-30 09:20

                               
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回復 Tinng 的帖子

yes, took the LRP out and replace it with HW 1S.  Huge different.  Especi ...

sounds interesting! let me get a HW 1S and try it out!

thanks ching

jf813 發表於 2011-5-30 09:20

                               
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回復 Tinng 的帖子

yes, took the LRP out and replace it with HW 1S.  Huge different.  Especi ...

Absolutely agree!

I tried the following setting @ TRC last week

- LRP SXX V2(Setting: 0-5-2-0) with 3.7V Lipo
- SP V2 3.5R Motor
- Pinion Gear 18 with Spur Gear 90
- Rear Tyre Diameter 43mm

The speed is ok la. The temperature of ESC is around 80 C & the temp of motor is around 90C. I felt the punch is not enough & can be more aggressive.

Anyway, I'll try to use hobby wing 1s later on.

Thanks All !!

yokomo 發表於 2011-5-31 15:34

                               
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I tried the following setting @ TRC last week

- LRP SXX V2(Setting: 0-5-2-0) with 3.7V Lipo

I did almost the same setting except the pinion gear is 21T in JV....corner handling is good but lost a lot in straight road ( increase boost can have more speed in straight road but lost handling in corning)...beside the energy distribution is bad that the speed trigger is pull 90% in the corner exit and lost more in straight road after 3~4 mins run... replaced the HW 1S, off the boost/punch for better corner handling and make over 80% turbo will bring u crazy speed in straight road thru out 8 mins!!  I am quite sure HW ESC is the only way to beat down the 4WD touring!!

回復 Tinng 的帖子

C Hing,

Actually, I am still learning how to play 1/12. That speed is still acceptable there.

Thanks All !!

回復 yokomo 的帖子

wor, motor very hot wor!!!  I run at TRC too and normally motor is around 50-60 degree.  ESC is hot around 70......  sorry can't remember the gear ratio but rollout as said earlier around 35......

回復 jf813 的帖子

Yes, the temp of my 3.5 is quite hot there. I am still thinking how to fix it.

Thanks All !!