I'm sorry to say that I can't respond to this. I gave the plane, engine, etc. to my grandson to build and fly. We ran out of flying weather early this year, and he shelfed the project until Spring. I do believe that the Mag. .91FS will pull that Tiger around veery well, and should be enjoyable. Recently I bench broke another one of these engines and once again am very impressed with it. It will be installed in a GP Tiger Moth. I have this same engine in my H-9 P-51 and it does a fine job. The mustang weight is 8 lbs. It has a lot more drag than your Tiger, and is heavier than the Tiger by far. Therefore, that tells me that you have made a good choice. Have fun with your Tiger, and please let us know how it flys!!!.........Cheers