nexxa

I actually have an OS.15 CV-A with a Mac tune pipe tune for a 7X7 APC sport prop on my Wonder. Fast but not enough. I prefer it when I put an 8X5 APC prop, less fast but more trust... the acceleration is very impressive... My Wonder is a little bit heavy, ready to fly weight with gas: 3 pound (48oz). This is why I want to run it with an 8 inch prop.

I don't have a lot of money to spend on a new engine.... I was looking to replace in my Wonder the .15CV-A by an OS.25LA without tune pipe and try to run it on a 8X8 APC prop...

I just want to know if the difference between these two engines is considerable... and I don’t want to loose my time by replacing the .15 by .25LA?

My goal, go faster without spending all my money in a new engines. My Wonder is just a toy for me... and a little bit heavy for a 7inch prop