Originally Posted by
YoDog
Ok, for starters, you should not be gearing a 10.5 and a 5.5 the same. We need to know what brand and model of 5.5 you are using. (very important) Normally you should not boost a 6.5 or lower motor without experience in doing this. It sound like you are way over timing the motor along with too much gearing to boot. Typically a 5.5 turn motor should be geared in the 8.0 - 9.0 FDR range without boost. If you want to boost, you should be over 9.0 FDR and only apply a little boost. (depending on how much static timing your motor already has) This is why knowing what motor you are using is so important. Some have up to 30* already built in.
I'm surprised your motor hasn't burned up yet. Update to the latest firmware then find a mod setup from Speed passion and only apply half of the boost suggested in the setup to start. work your way up till the speed is good and the temps are manageable.
It's a sakura zero and hardly getting warm. Others at the track run 7.7 to 1 ratio and are about 30-40 percent faster down the straight. I started at this ratio but it was slower than the 10.5 so I lowered the gear ratio to what the 10.5 was running and it runs cooler at that gear rate than the 10.5 does. Something is not right.
Ok so I have just regeared it to 7.7:1 which is what the club recommends for our large scale high speed flowing track.
Turned off the lipo cut off and the temp cut out then advanced the bellend timing to max (10 deg as it is a speed passion v3) and it appears as fast as with the lower gearing previous. Wont be able to tell until I get a new front drive belt and test it on the road.
I see the new mmm motors come preset in about the 15 deg position (as they have a different sensor board factory 11-20 deg) maybe I should put a 11-20 deg sensor board in? how much timing does everybody else run? Theres no adjustment on the esc, maybe because it is boosted?