RE: *** CLUB SUPER TIGRE ***
YOu have to give the Super Tigers a little longer to breakin and get the needles set properly. I like to adjust mine slowly each time I go out to fly it. I do all my engines this way but some will let you know if you go too fast and super tiger is one of them. I believe this gives the engine the extra lubricant and cool combustion flame it needs with a ring to get set properly. Just my opinion but no proof that this is the right way. Just give the 90 more time and you will be rewarded. The Super Tiger is more finnecky to needles being set properly than some engines and to the correct tank planement.
The 90 will swing the fire out of a 13X8 theree bladed prop if you are running one on a plane with limited ground clearance like a mustange etc..