The 9918 is just the slightly older version of what is now the 9920. The Lehner 1930/5 is a good motor, but I don't know how well it would work in a Revo. Here is something on it though:
http://www.bk-electronics.com/catalo...roducts_id=918
http://lehner-motoren.com/diagram/19....8v/grafik.gif
SH Z-Car, Custom Crawler, 8s Savage,
12s XTM XLB 1/7 buggy,
4wd 4-link rear/IFS Pro4 truck,
Custom Hyper 10 Short Course,
Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz