I have a quickie 500 with a Webra Speed 40 and a Mac's tuned pipe. The latest prop I have on it is a APC 9x7 prop. It was really fast with this prop... pulling something close to 17K rpm... but I think I could go with a 8.5 x 8.75 prop and really get a screamer... I have a fluttler problem I need to resolve first...
My quickie: