RE: Super Tiger G-21-46
Your wasting your time trying to make a performance piece out of this engine. It's timing is mild and will not do much in the speed department. It was highly prized by the c/l stunt community for it's well behaved manners with reasonable power levels and it's ability to deliver a 4-2-4 run. A speed engine it most definitely isn't.
Also consider that parts are getting really scarce for this engine and if your unlucky and break something you just might be out of luck.
Dennis