Let think about this..... Is there ever REALLY to much power? LoL But seriously you may have to beef up the wing center section with that engine. I have a saito 91 in mine and It's plenty of power.. Will hover and pull out! I'd say go for it just be careful on those downlines.. Also what's the weight of the G-90. Mine came in about a pound tailheavy with the saito so be prepared to shift some weight around. Other than that the tiger is a great plane.