Novak Havok 17.5 System in Slash
Novak Havok 17.5 System in Slash
07-06-2009, 05:02 PM
#4
Well, you need to find the smallest spur gear available for the Slash, I may be wrong, but I could swear I saw a 76 or 78 the other day at the LHS. Then find what the SC10 guys are running for 17.5 and figure their final drive ratio out.
Example:
SC10 - 78 spur, 28 pinion, 2.60 transmission
(78/28)*2.6 = 7.24
Slash - 78 spur, 29 pinion, 2.72 transmission
(78/29)*2.72 = 7.31
Get as close to the final drive as possible, then you can move the pinion up or down a tooth or 2 depending on heat and track conditions.
Example:
SC10 - 78 spur, 28 pinion, 2.60 transmission
(78/28)*2.6 = 7.24
Slash - 78 spur, 29 pinion, 2.72 transmission
(78/29)*2.72 = 7.31
Get as close to the final drive as possible, then you can move the pinion up or down a tooth or 2 depending on heat and track conditions.
07-06-2009, 05:08 PM
#5
Traxxas offers a 76. I ordered a couple of those along with a 28, 29 and 30 pinion. I figured I would start out with the 28. I don't want to blow away the Titans on the straight, I just want the maintence free design of a brushless while staying fair. Hopefully the Novak Havoc system doesn't disappoint.
07-06-2009, 05:40 PM
#6
Traxxas offers a 76. I ordered a couple of those along with a 28, 29 and 30 pinion. I figured I would start out with the 28. I don't want to blow away the Titans on the straight, I just want the maintence free design of a brushless while staying fair. Hopefully the Novak Havoc system doesn't disappoint.
07-06-2009, 08:11 PM
#9
I've got one in my Slash. It's my first brushless. I do like it but must say at this point I think my Titan was slightly faster. I'm running 86/25 gears on carpet and that's putting the motor around 160°F after about a 7-8 minute race. I've had a couple ESC thermal shutdowns...maybe I need to look into a fan.
However, the 17.5's in the local SC10's are noticeably faster. I suspect due to lighter vehicle and lighter, more efficient drivetrain.
However, the 17.5's in the local SC10's are noticeably faster. I suspect due to lighter vehicle and lighter, more efficient drivetrain.
07-06-2009, 09:15 PM
#10
I've got one in my Slash. It's my first brushless. I do like it but must say at this point I think my Titan was slightly faster. I'm running 86/25 gears on carpet and that's putting the motor around 160°F after about a 7-8 minute race. I've had a couple ESC thermal shutdowns...maybe I need to look into a fan.
However, the 17.5's in the local SC10's are noticeably faster. I suspect due to lighter vehicle and lighter, more efficient drivetrain.
However, the 17.5's in the local SC10's are noticeably faster. I suspect due to lighter vehicle and lighter, more efficient drivetrain.
07-06-2009, 10:04 PM
#13
its a little faster than the stock slash i had before my SC10. i was running 75/28 on my track and switched to 75/27 because the temps were just a little high for my liking....never a shutdown though. ive not needed anything down to a 24...just have saw others on here talk about running that gearing.
07-07-2009, 07:37 AM
#14
That puts the SC10 @ 7.22, so a 76/28 is 7.38 and a 76/29 is a 7.12....right there for gearing.
Big brute, that puts your final drive @ 9.35, sound like you may be overheating because of over-revving the motor for too long. Try upping the gears some to combat the thermalling.
Big brute, that puts your final drive @ 9.35, sound like you may be overheating because of over-revving the motor for too long. Try upping the gears some to combat the thermalling.
07-07-2009, 11:58 AM
#15
I have a Havoc 17.5 system in my SC10 and it works great. I'm running a 75 spur & 26t (I think, may be a 25) pinion and the truck never gets too hot, even when running around 20 mins.