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-   -   Viper RC - (https://www.rctech.net/forum/radio-electronics/455152-viper-rc.html)

smokinu 05-04-2011 08:04 PM


Originally Posted by niner (Post 9063956)
Thanks guys. That must be it. I haven't wired up the motor yet.

the motor is what makes the beep tones NOT the esc.

Fabulous 05-04-2011 08:45 PM

Can the capacitor board be de-soldiered and re-soldiered to the back of the esc?

Dlewis4 05-04-2011 08:50 PM


Originally Posted by Fabulous (Post 9064338)
Can the capacitor board be de-soldiered and re-soldiered to the back of the esc?

Yes.

beazer30801 05-04-2011 09:15 PM

Smokinu I had my buggy geared at 76/30 with the 13.5 and that's how it ran any other suggestions.

Dlewis4 05-04-2011 09:16 PM


Originally Posted by beazer30801 (Post 9064459)
Smoking I had my buggy geared at 76/30 with the 13.5 and that's how it ran any other suggestions.

Drop the pinion more....

try like, 26/27 pinion. Sounds like its WAY over geared.

scootinround 05-04-2011 10:49 PM


Originally Posted by Breeze (Post 9062647)
Whats the weight of the esc's

VTX10 = 47g
VTX10R= 58g

smokinu 05-05-2011 12:09 AM


Originally Posted by Dlewis4 (Post 9064463)
Drop the pinion more....

try like, 26/27 pinion. Sounds like its WAY over geared.

a 13.5 running slow is not over geared its under geared.. try a taller spur..

(sorry dont know kcar spurs off the top of my head)
but the next biggest spur with a 22-24 pinion.

drt_racer5 05-05-2011 12:51 AM

Ok I need some help/ I have a viper 8.5, novak GTB in a sc10. It is currently geared 21/84 and adv the timming to 40deg. it runs at 130 after a 10 min run and this thing is only slightly faster than my balistic 10.5 with same exact gearing, with the adv timing I do love how smooth it is out of the hole. I put in a friends novak 8.5ss geared 18/84 (the recomended starting point for 8.5) and it will shit all over my viper 8.5 with the 21 gear. I started at 18 and it wouldnt out run a 17.5 great temp though it was only about 90 deg after like 15 min. So my 1st question is do I keep gearing with stock timing till I get to like 150 deg? or can I leave tinming where it is add another gear or 2? which is better?

smokinu 05-05-2011 01:03 AM


Originally Posted by drt_racer5 (Post 9065034)
Ok I need some help/ I have a viper 8.5, novak GTB in a sc10. It is currently geared 21/84 and adv the timming to 40deg. it runs at 130 after a 10 min run and this thing is only slightly faster than my balistic 10.5 with same exact gearing, with the adv timing I do love how smooth it is out of the hole. I put in a friends novak 8.5ss geared 18/84 (the recomended starting point for 8.5) and it will shit all over my viper 8.5 with the 21 gear. I started at 18 and it wouldnt out run a 17.5 great temp though it was only about 90 deg after like 15 min. So my 1st question is do I keep gearing with stock timing till I get to like 150 deg? or can I leave tinming where it is add another gear or 2? which is better?

i would run 21t pinion but go to a 87t spur.

Dlewis4 05-05-2011 03:46 AM


Originally Posted by smokinu (Post 9064972)
a 13.5 running slow is not over geared its under geared.. try a taller spur..

(sorry dont know kcar spurs off the top of my head)
but the next biggest spur with a 22-24 pinion.

I'm sorry, but I completely disagree. I ran a K car all last indoor season. You need to drop your spur to like a 72 or 76. I ran stock and then moved to mod and ran same spur.

Sorry Smokin, but it's like the SC10. You have to drop the spur down in order to get anything out of the brushless motors.


Trust me on the K Car. Go to a 72 or 76 and mid 20's pinion.

My SP2 gearing
Stock-34/72
8.5- 23/72
13.5 gearing-25-26/72 depending on boost/timing

You don't have to believe me...but I ran this car all winter and it was crazy fast

CraigV 05-05-2011 04:09 AM

Smokinu, I think you have the spur gear size change backwards. If you're undergeared, you want to decrease the size of spur or increase the size of the pinion.

That will give you a smaller final drive ratio and will give you more top end, with the possible sacrafice of some low end.

shawn00sa 05-05-2011 06:03 AM

Any suggestions for gearing. Running a Viper 13.5 system in T4.1 on an average sized but "tight" loamy outdoor track. Any suggestions for a starting point?

CraigV 05-05-2011 06:23 AM


Originally Posted by shawn00sa (Post 9065738)
Any suggestions for gearing. Running a Viper 13.5 system in T4.1 on an average sized but "tight" loamy outdoor track. Any suggestions for a starting point?


For 13.5 boosted, try:
23/72 or 24/75 or 26/81 or 27/84. Basicly, start with a final drive ratio of about 8 and go from there depending on yoru track conditions and such. Be sure to check your motor temps.

http://rcgearhead.com/Gearing/Details/183

I have posted a bunch of gearing suggestions that Weylin has sent me. The site is still in beta, and only seems to work properly with IE9 and FireFox 4.

For those that can't access the site properly, here is what he sent me:
VST 13.5 boosted, VTX10, B4.1, indoor clay track, med/high traction - 29-30/72

VST 9.5 no boost, VTX10, B4.1, indoor clay track, med/high traction - 24/81
VST 8.5 no boost, VTX10, B4.1, indoor clay track, med/high traction - 23/81
VST 7.5 no boost, VTX10, B4.1, indoor clay track, med/high traction - 22/ 81
VST 7.5 no boost, VTX10, B4.1, outdoor hard pack, med/high traction - 23/81 (SRC track - Cactus Classic) 100+* track temp
VST 10.5 boosted, VTX10, SC10, indoor clay track, med/high traction - 20-21/84
VST 8.5 no boost, VTX10, SC10, indoor clay, med/high traction - 18/84
VST 7.5 no boost, VTX10, SC10, indoor clay, med/high traction - 17/84
VST 6.5 no boost, VTX10, SC10, indoor clay, med/high traction - 15-16/84
VST 17.5 boosted, Tekin, SC10, unknown, unknown - 21/81 (lots of boost, little turbo, no timing)
VST 17.5 boosted, VTX10, SC10, unknown, unknown - 26/84
VST 17.5 boosted, VTX10, TQ 2wd, outdoor hard pack, med/high traction - 31-33/72
VST 13.5 boosted, VTX10, TQ 2wd, outdoor hard pack, med/high traction - 27/72
VST 13.5 boosted, Tekin, TQ truck, outdoor hard pack, med/high traction - 26/80
VST 17.5 no boost, VTX10, T4.1, indoor clay, med/high traction - 30/75
VST 17.5 no boost, VTX10, B4.1, indoor clay, med/high traction - 34-36/72
VST 10.5 boosted, VTX10, modified touring car - 7.5 (large) -7.8 (med) FDR
VST 4.5 no boost, VTX10R, modified touring car - 8.3 (large) -8.7 (med) FDR
VST 3.5 no boost, VTX10R, modified touring car - 8.8 (large) -9.3 (med) FDR
VST 17.5 no boost, VTX10, stock touring car - 3.4 (large) - 3.7 (med) FDR
VST 6.5 no boost, unknown, Ofna TT, unknown, unknown - 11/12t pinion

I hope this helps. Again, check out www.rcgearhead.com/Gearing to play around with gearing, FDRs, and top speed. You can post your own gearing recommendations as well.

Craig

Breeze 05-05-2011 06:32 AM


Originally Posted by scootinround (Post 9064791)
VTX10 = 47g
VTX10R= 58g

Are those without wires?

jurquhart 05-05-2011 07:35 AM

does Viper make a motor that will handle the weight of the Losi ScTE 4x4? If so what motor is it


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