Are Zippy Lipos safe with a Castle MMM Speedy?

Originally Posted by fastbaja5b

So based on what is being said here, one should be fine to run it on 6s with the 20t pinion and if anything it should be easier on the system than running on the 25t pinion

so why are we being told that to run on 6s we must run the 25t pinion as is the feedback here:
http://www.ausrc.com/forum/showthread.php?t=15868

Where the blame has clearly been laid on the user running the 20t pinion and not the 25

If anything, if you're going to change gearing shouldn't it be down to like a 15/16t pinion?

And I still haven't had a reply from castle support, been what, 3-4 days now? :( not cool!

guys this is math higher voltage needs smaller pinion larger spur = less current = cooler esc. start with a smaller pinion like 18t and see what the temps are like then go up and see where things are. if you want to go 60 things are going to break. better to gear for 40's and things will last and you can focus on driving vs repairing

[fastbaja5b]

Originally Posted by alangsam

guys this is math higher voltage needs smaller pinion larger spur = less current = cooler esc. start with a smaller pinion like 18t and see what the temps are like then go up and see where things are. if you want to go 60 things are going to break. better to gear for 40's and things will last and you can focus on driving vs repairing

I agree, if I run 6s I want to gear at 17/18 t pinion but what we are being told here by HPI is that the ESC blew because the user ran the 20t pinion and not the 25t.

That is my point.

We all agree you should gear DOWN for more volts, but HPI is saying gear UP for more volts, and in the continued absence of a reply from castle creations on this matter, I want to be able to stay within warranty. Based on that, I need to throw out all the conventional logic and follow the manual, increase the load and gear the hell out of my motor on 6s?

[Lee Estingoy]

Originally Posted by fastbaja5b

I agree, if I run 6s I want to gear at 17/18 t pinion but what we are being told here by HPI is that the ESC blew because the user ran the 20t pinion and not the 25t.

That is my point.

We all agree you should gear DOWN for more volts, but HPI is saying gear UP for more volts, and in the continued absence of a reply from castle creations on this matter, I want to be able to stay within warranty. Based on that, I need to throw out all the conventional logic and follow the manual, increase the load and gear the hell out of my motor on 6s?

No. Increasing the load along with the volts is not a recipe for success. Decreasing the gear ratio (more motor turns for fewer wheel turns, or making a smaller fraction, for example: 1-50 instead of 1-20) is needed when increasing input voltage while holding the KV constant. That's true no matter what any manual says.

Thanks,

Lee