flat carpet about 150ft, tight corners, 2.2 tires
Thanks guys for the help

43/124 should put you close with those measurements

Wow, that seems like an awful big jump. Guess its a good starting point though. Thanks for the help guys.

flat carpet about 150ft, tight corners, 2.2 tires
Thanks guys for the help


If the car is working about a 2.55 rollout to start. 46/124 should get you close.

Sonny any suggestions for a 4300 120 spur for the birds?

Sonny any suggestions for a 4300 120 spur for the birds?

2.70 is what I plan to start with.

thanks.......

Ok the 124/46 does not give much room for ground clearance.....any idea what pinion to run if I use a 120 spur? My tires right now are 2.0

Ok the 124/46 does not give much room for ground clearance.....any idea what pinion to run if I use a 120 spur? My tires right now are 2.0 but I will most likely run them a little taller........

has anyone tried the freeze machines on the brushless motors ?

Why dont you go to a 104 and get your roll out from that.

Like 2.20 tire 104 spur and 41 pinion is a 2.72 roll out then you can true your foams down to get it to where you want.

tire size x 3.1415 x pinion / by spur gear. (like) 2.20x3.1415x41/104 this is roll out

Jake

has anyone tried the freeze machines on the brushless motors ?

Not really needed with the Sintered rotors.

I used one but the sintered rotors keep it pretty cool. Sonny where's Snoopy and the doghouse avatar

can someone explain the difference between a standard rotor and a sintered rotor and does it increase the over speed?

Sintering is a metallurgy process. http://www.sterlingsintered.com/process/Default.htm (http://www.sterlingsintered.com/process/Default.htm) will give you an example of how it works. Our sintered rotor is made this way. To me, it appeared to have a noticeably stronger magnet base. The output end of the shaft is bigger which is why it requires a different end cap.

In my personal application, it lowered the operating temperature quite a bit which tells me it is more efficient (probably because of the magnets) and because of that, I probably get better battery performance. But as for a real horse power difference, I don’t think it is there. What I think it is doing is either increasing the torque or moving the torque band. I have been able to go up a tooth but I am so new at this brushless stuff that I may not have had the right gear on in the first place so all I can tell you is to try a higher gear and see for yourself.

Is it worth it? I think so. Cooler motor and better battery performance may not be more horse power but the end results equal the same thing.

Here's another short one: http://www.roymech.co.uk/Useful_Tables/Manufacturing/Sintering.html

That is what I needed the formula for roll out......thanks Jake...... Why dont you go to a 104 and get your roll out from that.

Like 2.20 tire 104 spur and 41 pinion is a 2.72 roll out then you can true your foams down to get it to where you want.

tire size x 3.1415 x pinion / by spur gear. (like) 2.20x3.1415x41/104 this is roll out

Jake

Ginsu 3 weeks ago at Minnreg(snowbird 06 track) Most of us were starting at a 2.70 rollout. I was running a 116 spur few others were running it as well. Tires were at 2.18 But 2.13 is my goal to start with.

I like the idea of running a smaller spur....even though it seems it is advantageous to run a larger one with the brushless motors. Thanks...