No,if i were you id get a west 50t1. i know there 160 odd quid, but there well worth it. Power to weight is not an issue with any plane when this engine is instaled.

O'yeh, that includes a very high quality throttle pipe. I have a 13x4w prop spinning at 13'000rpm

An irvine 53 will swing a 12.25x3.75 at around 11'000rpm

See the diference

ian