Thanks Michael. Here is the info from the Capital RCMB Club website. This is a great starting point. Thanks Chilli!!!
9. FE P-Limited Rules:
A. Motor Specifications
The intent of the P-Limited Motor Specifications is to define motors to be used in Limited class racing. Motors in these specifications shall be based on readily available parts from past, current, and/or future Ready-to-Run offerings by various manufacturers. Only motors on the approved motor list shall be allowed. Motors are intended to be used as they are supplied. Therefore, no alterations or modifications are allowed, unless specifically stated in these rules. Motor shall be directly connected to the output drive shaft, no gear/belt over/under drives will be allowed.
B. Approved Motors:
The motors approved for P-Limited racing are:
ProBoat - PBR3310 A3630-1500 4 pole brushless motor (BJ26, Formula FastTech, Miss Elam FE)
AquaCraft - AQUG7000 L36/56 7.2-18V 6 pole brushless motor (SV27),
AQUG7001 36-56-2030 6 pole brushless motor (UL-1 Superior)
C. Cooling:
Motors and ESCs may be cooled as desired. Water jackets, cooling plates, electronic fans, etc., may be added as desired, so long as they don't perform an otherwise illegal function.
D. Contacts and Wiring:
Originally supplied contacts may be replaced. Wire length on the power and phase leads may be altered to facilitate installation. If lengthening the original wires, additional wire may be added to the factory supplied wires. If shortening the original wires, the final contact to the Motor or ESC must be made using the original wiring. The intent of this rule is to prevent the removal and replacement of the original wiring in its entirety, by requiring that the final contact to the Motor or ESC be made by the original wiring.
E. Capacitors:
Extra Capacitors may be used to protect the speed controller from ripple current.
F. Battery: Voltage limits and battery specifications will be in accordance with the P class located in the IMPBA rule book, Section J.
G. Hull:
Length restrictions shall be in accordance with the P Classes in the IMPBA rule book.