I managed to crack my T-34's wing in half (long story) and wanna pylon race safely after re-building, and hopefully win (that part might take a while cuz I haven't ever pylon raced b4) but is there any way to ensure a light but strong bond? on another plane that "cracked" the wing in half I used medium CA and 1in pieces of pushrods, sticking half of the push rod in one side of the crack (into the beam) and the other half in the other, and gluing it in there, I used epoxy around the "main beam" and a thinker piece of wire, it seems to hold well, but I want to know if there is a more efficient method... thanks

What I do for planes that will be subject to high G's is to epoxy the wing halves together, then I glass the center section with a layer of 2 oz fiberglass cloth. For added durability you may also want to put some carbon fiber on the spars and other high stress places. The carbon fiber is very strong, applys easily with CA and is light in weight.

Hope this helps.

yeah that's what I usually do but I hesitate to do the same with a plane I want to race to avoid adding extra weight...

You don't need to use 2 oz. glass on the wing. .5-.75 oz. would be more than sufficient. Especially if you are concerned about the weight. Using carbon fiber is an excellant idea, very light weight, yet extremely strong. To ensure a better bond, use 60 minute epoxy. It takes forever to cure, but the end result will be a superior bond than 30 minutue epoxy. If you plan on racing, than you definitely do not want to skimp in the strenth department. Good luck.