Viper RC -
#1400
#1402
#1403
Tech Regular
iTrader: (15)
Joined: Mar 2009
Posts: 297
From: KTown, AZ
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?
#1404
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?
#1405
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
#1406
Tech Regular
iTrader: (1)
Joined: Nov 2008
Posts: 476
From: Ontario, Canada
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.
That will give you a smaller final drive ratio and will give you more top end, with the possible sacrafice of some low end.
#1408
Tech Regular
iTrader: (1)
Joined: Nov 2008
Posts: 476
From: Ontario, Canada
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



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