Gearing the Novak 17.5 compared to a CO27
#1
Gearing the Novak 17.5 compared to a CO27
Well were going to go up for the Novak race and my son will run in the sportman class with the 17.5.
Couple of questions about the 17.5 gearing:
1) Do I gear about the same as I do for a starting point brushed and brushless?
2) Once I use the gearing as a starting point. Do I use the temp gun to try and obtain about 170 deg motor temp as I am with the 13.5?
The track is about 90 x 48 in size indoor carpet.
Thanks..
Couple of questions about the 17.5 gearing:
1) Do I gear about the same as I do for a starting point brushed and brushless?
2) Once I use the gearing as a starting point. Do I use the temp gun to try and obtain about 170 deg motor temp as I am with the 13.5?
The track is about 90 x 48 in size indoor carpet.
Thanks..
#2
Tech Master
Sup Big Dog!
Rodger at Trackside did a lot of testing with a 17.5. He found that he had to gear the motor STUIP tall. Much taller than our 13.5. So i would somewhere around a 4.0 ratio.
Hope that helps.
Rodger at Trackside did a lot of testing with a 17.5. He found that he had to gear the motor STUIP tall. Much taller than our 13.5. So i would somewhere around a 4.0 ratio.
Hope that helps.
#3
I believe there will be a limit on the gear ratio at the Novak race for sportsman class............I don't think it has been determined yet but I will try and find out and get it posted soon
also keep an eye on Trackside.com for rule updates
also keep an eye on Trackside.com for rule updates
#5
#8
Tech Master
iTrader: (26)
In my 12th scale I ran it at a 2.95 rollout. It made it near impossible to keep it rolled out as the tires got smaller. In my rubber tire/carpet TC, I run it at around 4.2 final drive. I can go lower and will be soon. It's a great "stock" motor. Finding the room to roll it out is a pain. Welcome to the land of big pinions/small spurs.
#9
Tech Adept
For 1/12th run something over 3.00. More in the range of 3.18. I have no problem staying with the co27's. Sportpak needs to try harder. You need a 78 spur. You will not be disappointed unless you race sedan then everything is disappointing.
#11
Tech Master
#12
Tech Master
iTrader: (35)
well,he's not asking but alot of people are going to want to know.Our local track last year allowed me to test the 13.5 in 1/12th and decided it was too fast for the stock motors in the class. This year the allow 17.5 in 1/12th. According to CRC (my conversation with John) Franks gearing with the 17.5 was 43-76. I'm geared at 42-92 (which worked well last year for the 13.5) and it ain't fast enough.