Brushed motor equivalent size

Somebody knowledgeable please tell me roughly which brushless inrunners and also which outrunners with about 2000 to 3000Kv would be equivalent in power and torque to a Mabuci RS550 brushed motor ? Or is power and torque 2 separate questions ?

Yep, that's similar. Not sure what the PC/VC variation difference is. This is the standard RS550 ;
http://www.trossenrobotics.com/store/p/5152-RS2-550-Motor-12V.aspx
I'm designing an electric start for a 40cc gas (petrol) engine and these are used to start slightly smaller engines so it's my starting point.
I'm trying to find out what would be a similar Power & torque in a Brushless inrunner. I'll adjust my gear ratio to match the RPM of the brushless. Am I correct in saying that Brushless motors have lots more
power & torque for the same physical size & weight ?
So is there a (say) 25mm or 28mm brushless inrunner with this power/torque ?

Thanks airwave. Sure powered through an ESC.
Cooling won't be an issue. A starter only runs for 5 seconds or so.
At about 500W that looks much more powerful than the Mabuci RS550 ? Am I correct ? How do I compare the power ? How do I compare the torque ?

i take it you are looking for a ~100-150 watts??the problem with the smaller ones they are low pole count and this makes them high KV.
here is a link to the page Small
I don't know of any that are beafy to use as a starter drive,maybe a long shaft that you could place bearigs on both sides of the shaft and pionon gear.

ps the power is the load you can run a 500 watt at 100

this one is 24mm and 350 watts
24mm motor
all most 2 x the kv you asked about ~46,000 rpm at 12 volts

Edited by airwave - 03/Sep/2012 at 5:58pm

1) yes the rs550 is a 100 watt motor,it will stall at 5596 g/cm@85 amps
2)a free runing motor will not make power,you can load a 500 watt to 100,200,300 ECT watts up to 500 max it may put out more for a short burst.if 300 watts is all that is needed to start the motor than it will make only 300 watts. the PC/VC is voltage spect on the rs550.
3)if you cick on the "motor type" link in the top right corner you will seee a red PDF logo it will open a full size page for the motors.

Edited by airwave - 04/Sep/2012 at 6:25am