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jhautz · 07:16 AM

P-fade,

I didn't realize you were planning to keep the 2 speed. I run my savage with the 2 speed as well.(most people lock it in 2nd gear from what I have seen) Its a prettty fat boy loaded up with the a123 packs too. BUT, with the 2 speed it makes a hell of of difference in the amount of torque you need to get it all rolling. I run my savage on a Lehner 1940/7(2239kv) and 5s2p a123 and it can wheelie at will up to 25mph or so and hits a gps verified 52mph on the top end and I can run it all day long no heat problems. If you are planning to keep the 2 speed you dont need the big beast 1521 in my opinion stick with the 1515. I would almost recomend getting the 1512. My 1940 is probably a 1512 equivilant. Remember with lower gearing in first gear you will want faster spool up to get the acceleration you want at the bottom end in first gear. The lower resistance of the shorter first gear allows less resistance on the motor so it has less resistance to spinning, but it also means that it takes a bigger motor rpm change to get the mph change on the bottom end. Also motors get hot if they are not loaded enough, and 1st gear on a big 1521 could possible be worse for heat than a smaller motor.

The 2 speed is alot of fun for bashing IMO. You can play with tuning the shift point to get the most out of the setup also. I finaly have mine dialed in just right. It actually pops the front wheels off of the ground when it shifts into 2nd gear now. With the electric setup on the 2 speed you will want to move the shift point higher than it is set for a stock nitro savage or it will be shifting way to early and you will only be using first gear for 10 feet and it will shift.

Only downsides to the 2 speed are you need to keep mechanical brakes , and there is no reverse. But the mechanical brakes are actually good in the case of a heavy savage IMO. Braking that heavy load puts alot of stress on the ECS and getting rid of that load helps keep the esc cool.

What speed control are you planning to use? I personally think that you will have more problems keeping the speedo cool on that heavy truck than you will keeeping the motor cool.

BTW: here is a link to my savage thread in the old temp forum. http://www.rc-monster.com/tempforum/...ghlight=savage
The fan on the motor was put on there before I relaized that I didnt need it so dont let that throw you.

	(#12)
jhautz RC-Monster Mod Offline Posts: 4,217 Join Date: Apr 2006 Location: Chicago, IL	10.11.2007, 07:05 AM P-fade, I didn't realize you were planning to keep the 2 speed. I run my savage with the 2 speed as well.(most people lock it in 2nd gear from what I have seen) Its a prettty fat boy loaded up with the a123 packs too. BUT, with the 2 speed it makes a hell of of difference in the amount of torque you need to get it all rolling. I run my savage on a Lehner 1940/7(2239kv) and 5s2p a123 and it can wheelie at will up to 25mph or so and hits a gps verified 52mph on the top end and I can run it all day long no heat problems. If you are planning to keep the 2 speed you dont need the big beast 1521 in my opinion stick with the 1515. I would almost recomend getting the 1512. My 1940 is probably a 1512 equivilant. Remember with lower gearing in first gear you will want faster spool up to get the acceleration you want at the bottom end in first gear. The lower resistance of the shorter first gear allows less resistance on the motor so it has less resistance to spinning, but it also means that it takes a bigger motor rpm change to get the mph change on the bottom end. Also motors get hot if they are not loaded enough, and 1st gear on a big 1521 could possible be worse for heat than a smaller motor. The 2 speed is alot of fun for bashing IMO. You can play with tuning the shift point to get the most out of the setup also. I finaly have mine dialed in just right. It actually pops the front wheels off of the ground when it shifts into 2nd gear now. With the electric setup on the 2 speed you will want to move the shift point higher than it is set for a stock nitro savage or it will be shifting way to early and you will only be using first gear for 10 feet and it will shift. Only downsides to the 2 speed are you need to keep mechanical brakes , and there is no reverse. But the mechanical brakes are actually good in the case of a heavy savage IMO. Braking that heavy load puts alot of stress on the ECS and getting rid of that load helps keep the esc cool. What speed control are you planning to use? I personally think that you will have more problems keeping the speedo cool on that heavy truck than you will keeeping the motor cool. BTW: here is a link to my savage thread in the old temp forum. http://www.rc-monster.com/tempforum/...ghlight=savage The fan on the motor was put on there before I relaized that I didnt need it so dont let that throw you. I can't decide if its more fun to make it... or break it... Silent...But Deadly Last edited by jhautz; 10.11.2007 at 07:16 AM.