I have the glow version of the Webra 91 P5 motor and it's very strong. APC 16X6 @ 8900 on 5% nitro. But there is no way a gas version will do that. It has to do better than a ST90 on gas, that's for sure. The BME 90 was down on power, 14X6 @ 9000 rpm. Not impressed.

$550.00 for that 91 is a bit steep, then again the glow wasn't cheap either. I found them for 302 euro or about $450.00 at another site.