RE: need advice for a good engine for 1/4 scale
Andrew66,
Based on the specs for the 60-90 sized GP Cub kit you would most likely by OK. With a wing area of over 1100 sq in and a weight of 9.5-12 lbs you should be able to do it with the 30cc Homie. However, you may want to check some of the kit builder forums to see if anyone else has built one and ask how it balanced. If they needed lots of nose weight then the conversion could be a very good choice. If the balance is the other way around and you still want a gasser maybe you should check out an SPE 26 from BCMA Engines. It is very light weight and has everything you need already on the engine. If you go ahead and buy the leafblower for $139 then add an ignition, prop hub, muffler, new carb, velocity stack and mount you will probably spend more and it will most likely be heavier than the SPE 26. The SPE 26 only weighs 35 oz which is only 8 more ozs than a Super Tiger 0.90.
Have fun!!!