Good G80T-G35E explination ClusterWiz. G80T= speed and a lot of coast, but that rocket doesn't have the weight to coast as far as a G35E or F10T will take it during their burns. This is because those motors use their burn for altitude rather than speed. That's why you don't really need an excessively long delay on the G35...a 10 is plenty for an altitute bird. This is because it's a long burn motor, and it doesn't have the power to let it coast for too long after the burn- it already has most of it's altitude from during the burn. With a G80T, though, you would need the longest delay possible (which happens to be a 10) because the rocket gains altitude from a G80T during the coast phase...it feeds off of the power provided in 1.5 secs of burn. And as I said before, you get the bulk of the altitude during the long burn of the G35. You still have a bit of coast with these, but the motor doesn't have the thrust behind it to make it coast near as long as a G80 (over two times the average thrust) would. The G80 is actually reverse of this... a bit of altitude during the burn, and a lot during the coast. Yeah, yeah...I know...I use too many ...'s and I end up writing so much because I repeat myself.
Anyways...a rocket to fly the motor in. As someone mentioned before, a mod'ed Estes Big Bertha works great. I flew mine on a G60-12, and then lost it on an Ellis G35-10. AWESOME high, neck popping flights. And it hit the top and traveled down a bit before ejecting, btw. So your delay is fine.
Whew.